module PostgresTests

open Expecto
open BitBadger.Documents
open BitBadger.Documents.Postgres
open BitBadger.Documents.Tests

(** UNIT TESTS **)

/// Unit tests for the Parameters module of the PostgreSQL library
let parametersTests = testList "Parameters" [
    testList "idParam" [
        // NOTE: these tests also exercise all branches of the internal parameterFor function
        test "succeeds for byte ID" {
            Expect.equal (idParam (sbyte 7)) ("@id", Sql.int8 (sbyte 7)) "Byte ID parameter not constructed correctly"
        }
        test "succeeds for unsigned byte ID" {
            Expect.equal
                (idParam (byte 7))
                ("@id", Sql.int8 (int8 (byte 7)))
                "Unsigned byte ID parameter not constructed correctly"
        }
        test "succeeds for short ID" {
            Expect.equal
                (idParam (int16 44)) ("@id", Sql.int16 (int16 44)) "Short ID parameter not constructed correctly"
        }
        test "succeeds for unsigned short ID" {
            Expect.equal
                (idParam (uint16 64))
                ("@id", Sql.int16 (int16 64))
                "Unsigned short ID parameter not constructed correctly"
        }
        test "succeeds for integer ID" {
            Expect.equal (idParam 88) ("@id", Sql.int 88) "Int ID parameter not constructed correctly"
        }
        test "succeeds for unsigned integer ID" {
            Expect.equal (idParam (uint 889)) ("@id", Sql.int 889) "Unsigned int ID parameter not constructed correctly"
        }
        test "succeeds for long ID" {
            Expect.equal
                (idParam (int64 123)) ("@id", Sql.int64 (int64 123)) "Long ID parameter not constructed correctly"
        }
        test "succeeds for unsigned long ID" {
            Expect.equal
                (idParam (uint64 6464))
                ("@id", Sql.int64 (int64 6464))
                "Unsigned long ID parameter not constructed correctly"
        }
        test "succeeds for decimal ID" {
            Expect.equal
                (idParam (decimal 4.56))
                ("@id", Sql.decimal (decimal 4.56))
                "Decimal ID parameter not constructed correctly"
        }
        test "succeeds for single ID" {
            Expect.equal
                (idParam (single 5.67))
                ("@id", Sql.double (double (single 5.67)))
                "Single ID parameter not constructed correctly"
        }
        test "succeeds for double ID" {
            Expect.equal
                (idParam (double 6.78))
                ("@id", Sql.double (double 6.78))
                "Double ID parameter not constructed correctly"
        }
        test "succeeds for string ID" {
            Expect.equal (idParam "99") ("@id", Sql.string "99") "String ID parameter not constructed correctly"
        }
        test "succeeds for non-numeric non-string ID" {
            let target = { new obj() with override _.ToString() = "ToString was called" } 
            Expect.equal
                (idParam target)
                ("@id", Sql.string "ToString was called")
                "Non-numeric, non-string parameter not constructed correctly"
        }
    ]
    test "jsonParam succeeds" {
        Expect.equal
            (jsonParam "@test" {| Something = "good" |})
            ("@test", Sql.jsonb """{"Something":"good"}""")
            "JSON parameter not constructed correctly"
    }
    testList "addFieldParams" [
        test "succeeds when a parameter is added" {
            let paramList = addFieldParams [ Field.Where "it" (Equal "242") ] []
            Expect.hasLength paramList 1 "There should have been a parameter added"
            let name, value = Seq.head paramList
            Expect.equal name "@field0" "Field parameter name not correct"
            Expect.equal value (Sql.string "242") "Parameter value not correct"
        }
        test "succeeds when multiple independent parameters are added" {
            let paramList = addFieldParams [ Field.Equal "me" "you"; Field.Greater "us" "them" ] [ idParam 14 ]
            Expect.hasLength paramList 3 "There should have been 2 parameters added"
            let p = Array.ofSeq paramList
            Expect.equal (fst p[0]) "@id" "First field parameter name not correct"
            Expect.equal (snd p[0]) (Sql.int 14) "First parameter value not correct"
            Expect.equal (fst p[1]) "@field0" "Second field parameter name not correct"
            Expect.equal (snd p[1]) (Sql.string "you") "Second parameter value not correct"
            Expect.equal (fst p[2]) "@field1" "Third parameter name not correct"
            Expect.equal (snd p[2]) (Sql.string "them") "Third parameter value not correct"
        }
        test "succeeds when a parameter is not added" {
            let paramList = addFieldParams [ Field.Exists "tacos" ] []
            Expect.isEmpty paramList "There should not have been any parameters added"
        }
        test "succeeds when two parameters are added for one field" {
            let paramList = addFieldParams [ { Field.Between "that" "eh" "zed" with ParameterName = Some "@test" } ] []
            Expect.hasLength paramList 2 "There should have been 2 parameters added"
            let name, value = Seq.head paramList
            Expect.equal name "@testmin" "Minimum field name not correct"
            Expect.equal value (Sql.string "eh") "Minimum parameter value not correct"
            let name, value = paramList |> Seq.skip 1 |> Seq.head
            Expect.equal name "@testmax" "Maximum field name not correct"
            Expect.equal value (Sql.string "zed") "Maximum parameter value not correct"
        }
    ]
    testList "fieldNameParams" [
        test "succeeds for one name" {
            let name, value = fieldNameParams [ "bob" ]
            Expect.equal name "@name" "The parameter name was incorrect"
            Expect.equal value (Sql.string "bob") "The parameter value was incorrect"
        }
        test "succeeds for multiple names" {
            let name, value = fieldNameParams [ "bob"; "tom"; "mike" ]
            Expect.equal name "@name" "The parameter name was incorrect"
            Expect.equal value (Sql.stringArray [| "bob"; "tom"; "mike" |]) "The parameter value was incorrect"
         }
    ]
    test "noParams succeeds" {
        Expect.isEmpty noParams "The no-params sequence should be empty"
    }
]

/// Unit tests for the Query module of the PostgreSQL library
let queryTests = testList "Query" [
    testList "whereByFields" [
        test "succeeds for a single field when a logical comparison is passed" {
            Expect.equal
                (Query.whereByFields Any [ { Field.Greater "theField" "0" with ParameterName = Some "@test" } ])
                "data->>'theField' > @test"
                "WHERE clause not correct"
        }
        test "succeeds for a single field when an existence comparison is passed" {
            Expect.equal
                (Query.whereByFields Any [ Field.NotExists "thatField" ])
                "data->>'thatField' IS NULL"
                "WHERE clause not correct"
        }
        test "succeeds for a single field when a between comparison is passed with numeric values" {
            Expect.equal
                (Query.whereByFields All [ { Field.Between "aField" 50 99 with ParameterName = Some "@range" } ])
                "(data->>'aField')::numeric BETWEEN @rangemin AND @rangemax"
                "WHERE clause not correct"
        }
        test "succeeds for a single field when a between comparison is passed with non-numeric values" {
            Expect.equal
                (Query.whereByFields Any [ { Field.Between "field0" "a" "b" with ParameterName = Some "@alpha" } ])
                "data->>'field0' BETWEEN @alphamin AND @alphamax"
                "WHERE clause not correct"
        }
        test "succeeds for all multiple fields with logical comparisons" {
            Expect.equal
                (Query.whereByFields All [ Field.Equal "theFirst" "1"; Field.Equal "numberTwo" "2" ])
                "data->>'theFirst' = @field0 AND data->>'numberTwo' = @field1"
                "WHERE clause not correct"
        }
        test "succeeds for any multiple fields with an existence comparisons" {
            Expect.equal
                (Query.whereByFields Any [ Field.NotExists "thatField"; Field.GreaterOrEqual "thisField" 18 ])
                "data->>'thatField' IS NULL OR (data->>'thisField')::numeric >= @field0"
                "WHERE clause not correct"
        }
        test "succeeds for all multiple fields with between comparisons" {
            Expect.equal
                (Query.whereByFields All [ Field.Between "aField" 50 99; Field.Between "anotherField" "a" "b" ])
                "(data->>'aField')::numeric BETWEEN @field0min AND @field0max AND data->>'anotherField' BETWEEN @field1min AND @field1max"
                "WHERE clause not correct"
        }
        test "succeeds for a field with an In comparison with alphanumeric values" {
            Expect.equal
                (Query.whereByFields All [ Field.In "this" [ "a"; "b"; "c" ] ])
                "data->>'this' IN (@field0_0, @field0_1, @field0_2)"
                "WHERE clause not correct"
        }
        test "succeeds for a field with an In comparison with numeric values" {
            Expect.equal
                (Query.whereByFields All [ Field.In "this" [ 7; 14; 21 ] ])
                "(data->>'this')::numeric IN (@field0_0, @field0_1, @field0_2)"
                "WHERE clause not correct"
        }
        test "succeeds for a field with an InArray comparison" {
            Expect.equal
                (Query.whereByFields All [ Field.InArray "theField" "the_table" [ "q", "r" ] ])
                "data->'theField' ?| @field0"
                "WHERE clause not correct"
        }
    ]
    testList "whereById" [
        test "succeeds for numeric ID" {
            Expect.equal (Query.whereById 18) "(data->>'Id')::numeric = @id" "WHERE clause not correct"
        }
        test "succeeds for string ID" {
            Expect.equal (Query.whereById "18") "data->>'Id' = @id" "WHERE clause not correct"
        }
        test "succeeds for non-numeric non-string ID" {
            Expect.equal
                (Query.whereById (System.Uri "https://example.com")) "data->>'Id' = @id" "WHERE clause not correct"
        }
    ]
    testList "Definition" [
        test "ensureTable succeeds" {
            Expect.equal
                (Query.Definition.ensureTable PostgresDb.TableName)
                $"CREATE TABLE IF NOT EXISTS {PostgresDb.TableName} (data JSONB NOT NULL)"
                "CREATE TABLE statement not constructed correctly"
        }
        test "ensureDocumentIndex succeeds for full index" {
            Expect.equal
                (Query.Definition.ensureDocumentIndex "schema.tbl" Full)
                "CREATE INDEX IF NOT EXISTS idx_tbl_document ON schema.tbl USING GIN (data)"
                "CREATE INDEX statement not constructed correctly"
        }
        test "ensureDocumentIndex succeeds for JSONB Path Ops index" {
            Expect.equal
                (Query.Definition.ensureDocumentIndex PostgresDb.TableName Optimized)
                (sprintf "CREATE INDEX IF NOT EXISTS idx_%s_document ON %s USING GIN (data jsonb_path_ops)"
                    PostgresDb.TableName PostgresDb.TableName)
                "CREATE INDEX statement not constructed correctly"
        }
    ]
    test "whereDataContains succeeds" {
        Expect.equal (Query.whereDataContains "@test") "data @> @test" "WHERE clause not correct"
    }
    test "whereJsonPathMatches succeeds" {
        Expect.equal (Query.whereJsonPathMatches "@path") "data @? @path::jsonpath" "WHERE clause not correct"
    }
    test "patch succeeds" {
        Expect.equal
            (Query.patch PostgresDb.TableName)
            $"UPDATE {PostgresDb.TableName} SET data = data || @data"
            "Patch query not correct"
    }
    test "removeFields succeeds" {
        Expect.equal
            (Query.removeFields PostgresDb.TableName)
            $"UPDATE {PostgresDb.TableName} SET data = data - @name"
            "Field removal query not correct"
    }
    test "byId succeeds" {
        Expect.equal (Query.byId "test" "14") "test WHERE data->>'Id' = @id" "By-ID query not correct"
    }
    test "byFields succeeds" {
        Expect.equal
            (Query.byFields "unit" Any [ Field.Greater "That" 14 ])
            "unit WHERE (data->>'That')::numeric > @field0"
            "By-Field query not correct"
    }
    test "byContains succeeds" {
        Expect.equal (Query.byContains "exam") "exam WHERE data @> @criteria" "By-Contains query not correct"
    }
    test "byPathMach succeeds" {
        Expect.equal
            (Query.byPathMatch "verify") "verify WHERE data @? @path::jsonpath" "By-JSON Path query not correct"
    }
]

(** INTEGRATION TESTS **)

open ThrowawayDb.Postgres
open Types

/// Load the test documents into the database
let loadDocs () = backgroundTask {
    for doc in testDocuments do do! insert PostgresDb.TableName doc
}

/// Integration tests for the Configuration module of the PostgreSQL library
let configurationTests = testList "Configuration" [
    test "useDataSource disposes existing source" {
        use db1 = ThrowawayDatabase.Create PostgresDb.ConnStr.Value
        let source = PostgresDb.MkDataSource db1.ConnectionString
        Configuration.useDataSource source

        use db2 = ThrowawayDatabase.Create PostgresDb.ConnStr.Value
        Configuration.useDataSource (PostgresDb.MkDataSource db2.ConnectionString)
        Expect.throws (fun () -> source.OpenConnection() |> ignore) "Data source should have been disposed"
    }
    test "dataSource returns configured data source" {
        use db = ThrowawayDatabase.Create PostgresDb.ConnStr.Value
        let source = PostgresDb.MkDataSource db.ConnectionString
        Configuration.useDataSource source

        Expect.isTrue (obj.ReferenceEquals(source, Configuration.dataSource ())) "Data source should have been the same"
    }
]

/// Integration tests for the Custom module of the PostgreSQL library
let customTests = testList "Custom" [
    testList "list" [
        testTask "succeeds when data is found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! docs = Custom.list (Query.find PostgresDb.TableName) [] fromData<JsonDocument>
            Expect.hasLength docs 5 "There should have been 5 documents returned"
        }
        testTask "succeeds when data is not found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! docs =
                Custom.list
                    $"SELECT data FROM {PostgresDb.TableName} WHERE data @? @path::jsonpath"
                    [ "@path", Sql.string "$.NumValue ? (@ > 100)" ]
                    fromData<JsonDocument>
            Expect.isEmpty docs "There should have been no documents returned"
        }
    ]
    testList "single" [
        testTask "succeeds when a row is found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc =
                Custom.single
                    $"SELECT data FROM {PostgresDb.TableName} WHERE data ->> 'Id' = @id"
                    [ "@id", Sql.string "one"]
                    fromData<JsonDocument>
            Expect.isSome doc "There should have been a document returned"
            Expect.equal doc.Value.Id "one" "The incorrect document was returned"
        }
        testTask "succeeds when a row is not found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc =
                Custom.single
                    $"SELECT data FROM {PostgresDb.TableName} WHERE data ->> 'Id' = @id"
                    [ "@id", Sql.string "eighty" ]
                    fromData<JsonDocument>
            Expect.isNone doc "There should not have been a document returned"
        }
    ]
    testList "nonQuery" [
        testTask "succeeds when operating on data" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! Custom.nonQuery $"DELETE FROM {PostgresDb.TableName}" []

            let! remaining = Count.all PostgresDb.TableName
            Expect.equal remaining 0 "There should be no documents remaining in the table"
        }
        testTask "succeeds when no data matches where clause" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! Custom.nonQuery
                    $"DELETE FROM {PostgresDb.TableName} WHERE data @? @path::jsonpath"
                    [ "@path", Sql.string "$.NumValue ? (@ > 100)" ]

            let! remaining = Count.all PostgresDb.TableName
            Expect.equal remaining 5 "There should be 5 documents remaining in the table"
        }
    ]
    testTask "scalar succeeds" {
        use  db  = PostgresDb.BuildDb()
        let! nbr = Custom.scalar "SELECT 5 AS test_value" [] (fun row -> row.int "test_value")
        Expect.equal nbr 5 "The query should have returned the number 5"
    }
]

/// Integration tests for the Definition module of the PostgreSQL library
let definitionTests = testList "Definition" [
    testTask "ensureTable succeeds" {
        use db = PostgresDb.BuildDb()
        let tableExists () =
            Custom.scalar "SELECT EXISTS (SELECT 1 FROM pg_class WHERE relname = 'ensured') AS it" [] toExists
        let keyExists () =
            Custom.scalar
                "SELECT EXISTS (SELECT 1 FROM pg_class WHERE relname = 'idx_ensured_key') AS it" [] toExists
        
        let! exists     = tableExists ()
        let! alsoExists = keyExists ()
        Expect.isFalse exists     "The table should not exist already"
        Expect.isFalse alsoExists "The key index should not exist already"

        do! Definition.ensureTable "ensured"
        let! exists'     = tableExists ()
        let! alsoExists' = keyExists   ()
        Expect.isTrue exists'    "The table should now exist"
        Expect.isTrue alsoExists' "The key index should now exist"
    }
    testTask "ensureDocumentIndex succeeds" {
        use db = PostgresDb.BuildDb()
        let indexExists () =
            Custom.scalar
                "SELECT EXISTS (SELECT 1 FROM pg_class WHERE relname = 'idx_ensured_document') AS it" [] toExists
        
        let! exists = indexExists ()
        Expect.isFalse exists "The index should not exist already"

        do! Definition.ensureTable         "ensured"
        do! Definition.ensureDocumentIndex "ensured" Optimized
        let! exists' = indexExists ()
        Expect.isTrue exists' "The index should now exist"
    }
    testTask "ensureFieldIndex succeeds" {
        use db = PostgresDb.BuildDb()
        let indexExists () =
            Custom.scalar "SELECT EXISTS (SELECT 1 FROM pg_class WHERE relname = 'idx_ensured_test') AS it" [] toExists
        
        let! exists = indexExists ()
        Expect.isFalse exists "The index should not exist already"

        do! Definition.ensureTable      "ensured"
        do! Definition.ensureFieldIndex "ensured" "test" [ "Id"; "Category" ]
        let! exists' = indexExists ()
        Expect.isTrue exists' "The index should now exist"
    }
]

/// Integration tests for the (auto-opened) Document module of the PostgreSQL library
let documentTests = testList "Document" [
    testList "insert" [
        testTask "succeeds" {
            use db = PostgresDb.BuildDb()
            let! before = Find.all<SubDocument> PostgresDb.TableName
            Expect.equal before [] "There should be no documents in the table"

            let testDoc = { emptyDoc with Id = "turkey"; Sub = Some { Foo = "gobble"; Bar = "gobble" } }
            do! insert PostgresDb.TableName testDoc
            let! after = Find.all<JsonDocument> PostgresDb.TableName
            Expect.equal after [ testDoc ] "There should have been one document inserted"
        }
        testTask "fails for duplicate key" {
            use db = PostgresDb.BuildDb()
            do! insert PostgresDb.TableName { emptyDoc with Id = "test" }
            Expect.throws
                (fun () ->
                    insert PostgresDb.TableName {emptyDoc with Id = "test" }
                    |> Async.AwaitTask
                    |> Async.RunSynchronously)
                "An exception should have been raised for duplicate document ID insert"
        }
        testTask "succeeds when adding a numeric auto ID" {
            try
                Configuration.useAutoIdStrategy Number
                Configuration.useIdField "Key"
                use db = PostgresDb.BuildDb()
                let! before = Count.all PostgresDb.TableName
                Expect.equal before 0 "There should be no documents in the table"
                
                do! insert PostgresDb.TableName { Key = 0; Text = "one" }
                do! insert PostgresDb.TableName { Key = 0; Text = "two" }
                do! insert PostgresDb.TableName { Key = 77; Text = "three" }
                do! insert PostgresDb.TableName { Key = 0; Text = "four" }
                
                let! after = Find.allOrdered<NumIdDocument> PostgresDb.TableName [ Field.Named "n:Key" ]
                Expect.hasLength after 4 "There should have been 4 documents returned"
                Expect.equal (after |> List.map _.Key) [ 1; 2; 77; 78 ] "The IDs were not generated correctly"
            finally
                Configuration.useAutoIdStrategy Disabled
                Configuration.useIdField "Id"
        }
        testTask "succeeds when adding a GUID auto ID" {
            try
                Configuration.useAutoIdStrategy Guid
                use db = PostgresDb.BuildDb()
                let! before = Count.all PostgresDb.TableName
                Expect.equal before 0 "There should be no documents in the table"
                
                do! insert PostgresDb.TableName { emptyDoc with Value = "one" }
                do! insert PostgresDb.TableName { emptyDoc with Value = "two" }
                do! insert PostgresDb.TableName { emptyDoc with Id = "abc123"; Value = "three" }
                do! insert PostgresDb.TableName { emptyDoc with Value = "four" }
                
                let! after = Find.all<JsonDocument> PostgresDb.TableName
                Expect.hasLength after 4 "There should have been 4 documents returned"
                Expect.hasCountOf after 3u (fun doc -> doc.Id.Length = 32) "Three of the IDs should have been GUIDs"
                Expect.hasCountOf after 1u (fun doc -> doc.Id = "abc123") "The provided ID should have been used as-is"
            finally
                Configuration.useAutoIdStrategy Disabled
        }
        testTask "succeeds when adding a RandomString auto ID" {
            try
                Configuration.useAutoIdStrategy RandomString
                Configuration.useIdStringLength 44
                use db = PostgresDb.BuildDb()
                let! before = Count.all PostgresDb.TableName
                Expect.equal before 0 "There should be no documents in the table"
                
                do! insert PostgresDb.TableName { emptyDoc with Value = "one" }
                do! insert PostgresDb.TableName { emptyDoc with Value = "two" }
                do! insert PostgresDb.TableName { emptyDoc with Id = "abc123"; Value = "three" }
                do! insert PostgresDb.TableName { emptyDoc with Value = "four" }
                
                let! after = Find.all<JsonDocument> PostgresDb.TableName
                Expect.hasLength after 4 "There should have been 4 documents returned"
                Expect.hasCountOf
                    after 3u (fun doc -> doc.Id.Length = 44)
                    "Three of the IDs should have been 44-character random strings"
                Expect.hasCountOf after 1u (fun doc -> doc.Id = "abc123") "The provided ID should have been used as-is"
            finally
                Configuration.useAutoIdStrategy Disabled
                Configuration.useIdStringLength 16
        }
    ]
    testList "save" [
        testTask "succeeds when a document is inserted" {
            use db = PostgresDb.BuildDb()
            let! before = Find.all<JsonDocument> PostgresDb.TableName
            Expect.equal before [] "There should be no documents in the table"

            let testDoc = { emptyDoc with Id = "test"; Sub = Some { Foo = "a"; Bar = "b" } }
            do! save PostgresDb.TableName testDoc
            let! after = Find.all<JsonDocument> PostgresDb.TableName
            Expect.equal after [ testDoc ] "There should have been one document inserted"
        }
        testTask "succeeds when a document is updated" {
            use db = PostgresDb.BuildDb()
            let testDoc = { emptyDoc with Id = "test"; Sub = Some { Foo = "a"; Bar = "b" } }
            do! insert PostgresDb.TableName testDoc

            let! before = Find.byId<string, JsonDocument> PostgresDb.TableName "test"
            Expect.isSome before "There should have been a document returned"
            Expect.equal before.Value testDoc "The document is not correct"

            let upd8Doc = { testDoc with Sub = Some { Foo = "c"; Bar = "d" } }
            do! save PostgresDb.TableName upd8Doc
            let! after = Find.byId<string, JsonDocument> PostgresDb.TableName "test"
            Expect.isSome after "There should have been a document returned post-update"
            Expect.equal after.Value upd8Doc "The updated document is not correct"
        }
    ]
]

/// Integration tests for the Count module of the PostgreSQL library
let countTests = testList "Count" [
    testTask "all succeeds" {
        use db = PostgresDb.BuildDb()
        do! loadDocs ()

        let! theCount = Count.all PostgresDb.TableName
        Expect.equal theCount 5 "There should have been 5 matching documents"
    }
    testList "byFields" [
        testTask "succeeds when items are found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()
            
            let! theCount =
                Count.byFields PostgresDb.TableName Any [ Field.Between "NumValue" 15 20; Field.Equal "NumValue" 0 ]
            Expect.equal theCount 3 "There should have been 3 matching documents"
        }
        testTask "succeeds when items are not found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()
            
            let! theCount = Count.byFields PostgresDb.TableName All [ Field.Exists "Sub"; Field.Greater "NumValue" 100 ]
            Expect.equal theCount 0 "There should have been no matching documents"
        }
    ]
    testTask "byContains succeeds" {
        use db = PostgresDb.BuildDb()
        do! loadDocs ()

        let! theCount = Count.byContains PostgresDb.TableName {| Value = "purple" |}
        Expect.equal theCount 2 "There should have been 2 matching documents"
    }
    testTask "byJsonPath succeeds" {
        use db = PostgresDb.BuildDb()
        do! loadDocs ()

        let! theCount = Count.byJsonPath PostgresDb.TableName "$.NumValue ? (@ > 5)"
        Expect.equal theCount 3 "There should have been 3 matching documents"
    }
]

/// Integration tests for the Exists module of the PostgreSQL library
let existsTests = testList "Exists" [
    testList "byId" [
        testTask "succeeds when a document exists" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! exists = Exists.byId PostgresDb.TableName "three"
            Expect.isTrue exists "There should have been an existing document"
        }
        testTask "succeeds when a document does not exist" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! exists = Exists.byId PostgresDb.TableName "seven"
            Expect.isFalse exists "There should not have been an existing document"
        }
    ]
    testList "byFields" [
        testTask "succeeds when documents exist" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! exists = Exists.byFields PostgresDb.TableName Any [ Field.Exists "Sub"; Field.Exists "Boo" ]
            Expect.isTrue exists "There should have been existing documents"
        }
        testTask "succeeds when documents do not exist" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! exists = Exists.byFields PostgresDb.TableName All [ Field.Equal "NumValue" "six"; Field.Exists "Nope" ]
            Expect.isFalse exists "There should not have been existing documents"
        }
    ]
    testList "byContains" [
        testTask "succeeds when documents exist" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! exists = Exists.byContains PostgresDb.TableName {| NumValue = 10 |}
            Expect.isTrue exists "There should have been existing documents"
        }
        testTask "succeeds when no matching documents exist" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! exists = Exists.byContains PostgresDb.TableName {| Nothing = "none" |}
            Expect.isFalse exists "There should not have been any existing documents"
        }
    ]
    testList "byJsonPath" [
        testTask "succeeds when documents exist" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! exists = Exists.byJsonPath PostgresDb.TableName """$.Sub.Foo ? (@ == "green")"""
            Expect.isTrue exists "There should have been existing documents"
        }
        testTask "succeeds when no matching documents exist" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! exists = Exists.byJsonPath PostgresDb.TableName "$.NumValue ? (@ > 1000)"
            Expect.isFalse exists "There should not have been any existing documents"
        }
    ]
]

/// Integration tests for the Find module of the PostgreSQL library
let findTests = testList "Find" [
    testList "all" [
        testTask "succeeds when there is data" {
            use db = PostgresDb.BuildDb()

            do! insert PostgresDb.TableName { Foo = "one"; Bar = "two" }
            do! insert PostgresDb.TableName { Foo = "three"; Bar = "four" }
            do! insert PostgresDb.TableName { Foo = "five"; Bar = "six" }

            let! results = Find.all<SubDocument> PostgresDb.TableName
            Expect.equal
                results
                [ { Foo = "one"; Bar = "two" }; { Foo = "three"; Bar = "four" }; { Foo = "five"; Bar = "six" } ]
                "There should have been 3 documents returned"
        }
        testTask "succeeds when there is no data" {
            use db = PostgresDb.BuildDb()
            let! results = Find.all<SubDocument> PostgresDb.TableName
            Expect.equal results [] "There should have been no documents returned"
        }
    ]
    testList "allOrdered" [
        testTask "succeeds when ordering numerically" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()
            
            let! results = Find.allOrdered<JsonDocument> PostgresDb.TableName [ Field.Named "n:NumValue" ]
            Expect.hasLength results 5 "There should have been 5 documents returned"
            Expect.equal
                (results |> List.map _.Id |> String.concat "|")
                "one|three|two|four|five"
                "The documents were not ordered correctly"
        }
        testTask "succeeds when ordering numerically descending" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()
            
            let! results = Find.allOrdered<JsonDocument> PostgresDb.TableName [ Field.Named "n:NumValue DESC" ]
            Expect.hasLength results 5 "There should have been 5 documents returned"
            Expect.equal
                (results |> List.map _.Id |> String.concat "|")
                "five|four|two|three|one"
                "The documents were not ordered correctly"
        }
        testTask "succeeds when ordering alphabetically" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()
            
            let! results = Find.allOrdered<JsonDocument> PostgresDb.TableName [ Field.Named "Id DESC" ]
            Expect.hasLength results 5 "There should have been 5 documents returned"
            Expect.equal
                (results |> List.map _.Id |> String.concat "|")
                "two|three|one|four|five"
                "The documents were not ordered correctly"
        }
    ]
    testList "byId" [
        testTask "succeeds when a document is found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc = Find.byId<string, JsonDocument> PostgresDb.TableName "two"
            Expect.isSome doc "There should have been a document returned"
            Expect.equal doc.Value.Id "two" "The incorrect document was returned"
        }
        testTask "succeeds when a document is not found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc = Find.byId<string, JsonDocument> PostgresDb.TableName "three hundred eighty-seven"
            Expect.isNone doc "There should not have been a document returned"
        }
    ]
    testList "byFields" [
        testTask "succeeds when documents are found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! docs =
                Find.byFields<JsonDocument>
                    PostgresDb.TableName All [ Field.In "Value" [ "purple"; "blue" ]; Field.Exists "Sub" ]
            Expect.hasLength docs 1 "There should have been one document returned"
        }
        testTask "succeeds when documents are found using IN with numeric field" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! docs = Find.byFields<JsonDocument> PostgresDb.TableName All [ Field.In "NumValue" [ 2; 4; 6; 8 ] ]
            Expect.hasLength docs 1 "There should have been one document returned"
        }
        testTask "succeeds when documents are not found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! docs =
                Find.byFields<JsonDocument>
                    PostgresDb.TableName All [ Field.Equal "Value" "mauve"; Field.NotEqual "NumValue" 40 ]
            Expect.isEmpty docs "There should have been no documents returned"
        }
        testTask "succeeds for InArray when matching documents exist" {
            use db = PostgresDb.BuildDb()
            do! Definition.ensureTable PostgresDb.TableName
            for doc in ArrayDocument.TestDocuments do do! insert PostgresDb.TableName doc
            
            let! docs =
                Find.byFields<ArrayDocument>
                    PostgresDb.TableName All [ Field.InArray "Values" PostgresDb.TableName [ "c" ] ]
            Expect.hasLength docs 2 "There should have been two documents returned"
        }
        testTask "succeeds for InArray when no matching documents exist" {
            use db = PostgresDb.BuildDb()
            do! Definition.ensureTable PostgresDb.TableName
            for doc in ArrayDocument.TestDocuments do do! insert PostgresDb.TableName doc
            
            let! docs =
                Find.byFields<ArrayDocument>
                    PostgresDb.TableName All [ Field.InArray "Values" PostgresDb.TableName [ "j" ] ]
            Expect.isEmpty docs "There should have been no documents returned"
        }
    ]
    testList "byFieldsOrdered" [
        testTask "succeeds when sorting ascending" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! docs =
                Find.byFieldsOrdered<JsonDocument>
                    PostgresDb.TableName All [ Field.Equal "Value" "purple" ] [ Field.Named "Id" ]
            Expect.hasLength docs 2 "There should have been two documents returned"
            Expect.equal
                (docs |> List.map _.Id |> String.concat "|") "five|four" "Documents not ordered correctly"
        }
        testTask "succeeds when sorting descending" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! docs =
                Find.byFieldsOrdered<JsonDocument>
                    PostgresDb.TableName All [ Field.Equal "Value" "purple" ] [ Field.Named "Id DESC" ]
            Expect.hasLength docs 2 "There should have been two documents returned"
            Expect.equal
                (docs |> List.map _.Id |> String.concat "|") "four|five" "Documents not ordered correctly"
        }
    ]
    testList "byContains" [
        testTask "succeeds when documents are found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! docs = Find.byContains<JsonDocument> PostgresDb.TableName {| Sub = {| Foo = "green" |} |}
            Expect.equal (List.length docs) 2 "There should have been two documents returned"
        }
        testTask "succeeds when documents are not found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! docs = Find.byContains<JsonDocument> PostgresDb.TableName {| Value = "mauve" |}
            Expect.isEmpty docs "There should have been no documents returned"
        }
    ]
    testList "byContainsOrdered" [
        // Id = two, Sub.Bar = blue; Id = four, Sub.Bar = red
        testTask "succeeds when sorting ascending" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! docs =
                Find.byContainsOrdered<JsonDocument>
                    PostgresDb.TableName {| Sub = {| Foo = "green" |} |} [ Field.Named "Sub.Bar" ]
            Expect.hasLength docs 2 "There should have been two documents returned"
            Expect.equal
                (docs |> List.map _.Id |> String.concat "|") "two|four" "Documents not ordered correctly"
        }
        testTask "succeeds when sorting descending" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! docs =
                Find.byContainsOrdered<JsonDocument>
                    PostgresDb.TableName {| Sub = {| Foo = "green" |} |} [ Field.Named "Sub.Bar DESC" ]
            Expect.hasLength docs 2 "There should have been two documents returned"
            Expect.equal
                (docs |> List.map _.Id |> String.concat "|") "four|two" "Documents not ordered correctly"
        }
    ]
    testList "byJsonPath" [
        testTask "succeeds when documents are found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! docs = Find.byJsonPath<JsonDocument> PostgresDb.TableName "$.NumValue ? (@ < 15)"
            Expect.equal (List.length docs) 3 "There should have been 3 documents returned"
        }
        testTask "succeeds when documents are not found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! docs = Find.byJsonPath<JsonDocument> PostgresDb.TableName "$.NumValue ? (@ < 0)"
            Expect.isEmpty docs "There should have been no documents returned"
        }
    ]
    testList "byJsonPathOrdered" [
        // Id = one, NumValue = 0; Id = two, NumValue = 10; Id = three, NumValue = 4
        testTask "succeeds when sorting ascending" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! docs =
                Find.byJsonPathOrdered<JsonDocument>
                    PostgresDb.TableName "$.NumValue ? (@ < 15)" [ Field.Named "n:NumValue" ]
            Expect.hasLength docs 3 "There should have been 3 documents returned"
            Expect.equal
                (docs |> List.map _.Id |> String.concat "|") "one|three|two" "Documents not ordered correctly"
        }
        testTask "succeeds when sorting descending" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! docs =
                Find.byJsonPathOrdered<JsonDocument>
                    PostgresDb.TableName "$.NumValue ? (@ < 15)" [ Field.Named "n:NumValue DESC" ]
            Expect.hasLength docs 3 "There should have been 3 documents returned"
            Expect.equal
                (docs |> List.map _.Id |> String.concat "|") "two|three|one" "Documents not ordered correctly"
        }
    ]
    testList "firstByFields" [
        testTask "succeeds when a document is found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc = Find.firstByFields<JsonDocument> PostgresDb.TableName Any [ Field.Equal "Value" "another" ]
            Expect.isSome doc "There should have been a document returned"
            Expect.equal doc.Value.Id "two" "The incorrect document was returned"
        }
        testTask "succeeds when multiple documents are found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc = Find.firstByFields<JsonDocument> PostgresDb.TableName Any [ Field.Equal "Value" "purple" ]
            Expect.isSome doc "There should have been a document returned"
            Expect.contains [ "five"; "four" ] doc.Value.Id "An incorrect document was returned"
        }
        testTask "succeeds when a document is not found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc = Find.firstByFields<JsonDocument> PostgresDb.TableName Any [ Field.Equal "Value" "absent" ]
            Expect.isNone doc "There should not have been a document returned"
        }
    ]
    testList "firstByFieldsOrdered" [
        testTask "succeeds when sorting ascending" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc =
                Find.firstByFieldsOrdered<JsonDocument>
                    PostgresDb.TableName Any [ Field.Equal "Value" "purple" ] [ Field.Named "Id" ]
            Expect.isSome doc "There should have been a document returned"
            Expect.equal "five" doc.Value.Id "An incorrect document was returned"
        }
        testTask "succeeds when sorting descending" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc =
                Find.firstByFieldsOrdered<JsonDocument>
                    PostgresDb.TableName Any [ Field.Equal "Value" "purple" ] [ Field.Named "Id DESC" ]
            Expect.isSome doc "There should have been a document returned"
            Expect.equal "four" doc.Value.Id "An incorrect document was returned"
        }
    ]
    testList "firstByContains" [
        testTask "succeeds when a document is found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc = Find.firstByContains<JsonDocument> PostgresDb.TableName {| Value = "another" |}
            Expect.isSome doc "There should have been a document returned"
            Expect.equal doc.Value.Id "two" "The incorrect document was returned"
        }
        testTask "succeeds when multiple documents are found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc = Find.firstByContains<JsonDocument> PostgresDb.TableName {| Sub = {| Foo = "green" |} |}
            Expect.isSome doc "There should have been a document returned"
            Expect.contains [ "two"; "four" ] doc.Value.Id "An incorrect document was returned"
        }
        testTask "succeeds when a document is not found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc = Find.firstByContains<JsonDocument> PostgresDb.TableName {| Value = "absent" |}
            Expect.isNone doc "There should not have been a document returned"
        }
    ]
    testList "firstByContainsOrdered" [
        testTask "succeeds when sorting ascending" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc =
                Find.firstByContainsOrdered<JsonDocument>
                    PostgresDb.TableName {| Sub = {| Foo = "green" |} |} [ Field.Named "Value" ]
            Expect.isSome doc "There should have been a document returned"
            Expect.equal "two" doc.Value.Id "An incorrect document was returned"
        }
        testTask "succeeds when sorting descending" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc =
                Find.firstByContainsOrdered<JsonDocument>
                    PostgresDb.TableName {| Sub = {| Foo = "green" |} |} [ Field.Named "Value DESC" ]
            Expect.isSome doc "There should have been a document returned"
            Expect.equal "four" doc.Value.Id "An incorrect document was returned"
        }
    ]
    testList "firstByJsonPath" [
        testTask "succeeds when a document is found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc = Find.firstByJsonPath<JsonDocument> PostgresDb.TableName """$.Value ? (@ == "FIRST!")"""
            Expect.isSome doc "There should have been a document returned"
            Expect.equal doc.Value.Id "one" "The incorrect document was returned"
        }
        testTask "succeeds when multiple documents are found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc = Find.firstByJsonPath<JsonDocument> PostgresDb.TableName """$.Sub.Foo ? (@ == "green")"""
            Expect.isSome doc "There should have been a document returned"
            Expect.contains [ "two"; "four" ] doc.Value.Id "An incorrect document was returned"
        }
        testTask "succeeds when a document is not found" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc = Find.firstByJsonPath<JsonDocument> PostgresDb.TableName """$.Id ? (@ == "nope")"""
            Expect.isNone doc "There should not have been a document returned"
        }
    ]
    testList "firstByJsonPathOrdered" [
        testTask "succeeds when sorting ascending" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc =
                Find.firstByJsonPathOrdered<JsonDocument>
                    PostgresDb.TableName """$.Sub.Foo ? (@ == "green")""" [ Field.Named "Sub.Bar" ]
            Expect.isSome doc "There should have been a document returned"
            Expect.equal "two" doc.Value.Id "An incorrect document was returned"
        }
        testTask "succeeds when sorting descending" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let! doc =
                Find.firstByJsonPathOrdered<JsonDocument>
                    PostgresDb.TableName """$.Sub.Foo ? (@ == "green")""" [ Field.Named "Sub.Bar DESC" ]
            Expect.isSome doc "There should have been a document returned"
            Expect.equal "four" doc.Value.Id "An incorrect document was returned"
        }
    ]
]

/// Integration tests for the Update module of the PostgreSQL library
let updateTests = testList "Update" [
    testList "byId" [
        testTask "succeeds when a document is updated" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            let testDoc = { emptyDoc with Id = "one"; Sub = Some { Foo = "blue"; Bar = "red" } }
            do! Update.byId PostgresDb.TableName "one" testDoc
            let! after = Find.byId<string, JsonDocument> PostgresDb.TableName "one"
            Expect.isSome after "There should have been a document returned post-update"
            Expect.equal after.Value testDoc "The updated document is not correct"
        }
        testTask "succeeds when no document is updated" {
            use db = PostgresDb.BuildDb()

            let! before = Count.all PostgresDb.TableName
            Expect.equal before 0 "There should have been no documents returned"
            
            // This not raising an exception is the test
            do! Update.byId
                    PostgresDb.TableName "test" { emptyDoc with Id = "x"; Sub = Some { Foo = "blue"; Bar = "red" } }
        }
    ]
    testList "byFunc" [
        testTask "succeeds when a document is updated" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! Update.byFunc PostgresDb.TableName (_.Id) { Id = "one"; Value = "le un"; NumValue = 1; Sub = None }
            let! after = Find.byId<string, JsonDocument> PostgresDb.TableName "one"
            Expect.isSome after "There should have been a document returned post-update"
            Expect.equal
                after.Value
                { Id = "one"; Value = "le un"; NumValue = 1; Sub = None }
                "The updated document is not correct"
        }
        testTask "succeeds when no document is updated" {
            use db = PostgresDb.BuildDb()

            let! before = Count.all PostgresDb.TableName
            Expect.equal before 0 "There should have been no documents returned"
            
            // This not raising an exception is the test
            do! Update.byFunc PostgresDb.TableName (_.Id) { Id = "one"; Value = "le un"; NumValue = 1; Sub = None }
        }
    ]
]

/// Integration tests for the Patch module of the PostgreSQL library
let patchTests = testList "Patch" [
    testList "byId" [
        testTask "succeeds when a document is updated" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()
            
            do! Patch.byId PostgresDb.TableName "one" {| NumValue = 44 |}
            let! after = Find.byId<string, JsonDocument> PostgresDb.TableName "one"
            Expect.isSome after "There should have been a document returned post-update"
            Expect.equal after.Value.NumValue 44 "The updated document is not correct"
        }
        testTask "succeeds when no document is updated" {
            use db = PostgresDb.BuildDb()

            let! before = Count.all PostgresDb.TableName
            Expect.equal before 0 "There should have been no documents returned"
            
            // This not raising an exception is the test
            do! Patch.byId PostgresDb.TableName "test" {| Foo = "green" |}
        }
    ]
    testList "byFields" [
        testTask "succeeds when a document is updated" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()
            
            do! Patch.byFields PostgresDb.TableName Any [ Field.Equal "Value" "purple" ] {| NumValue = 77 |}
            let! after = Count.byFields PostgresDb.TableName Any [ Field.Equal "NumValue" 77 ]
            Expect.equal after 2 "There should have been 2 documents returned"
        }
        testTask "succeeds when no document is updated" {
            use db = PostgresDb.BuildDb()

            let! before = Count.all PostgresDb.TableName
            Expect.equal before 0 "There should have been no documents returned"
            
            // This not raising an exception is the test
            do! Patch.byFields PostgresDb.TableName Any [ Field.Equal "Value" "burgundy" ] {| Foo = "green" |}
        }
    ]
    testList "byContains" [
        testTask "succeeds when a document is updated" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()
            
            do! Patch.byContains PostgresDb.TableName {| Value = "purple" |} {| NumValue = 77 |}
            let! after = Count.byContains PostgresDb.TableName {| NumValue = 77 |}
            Expect.equal after 2 "There should have been 2 documents returned"
        }
        testTask "succeeds when no document is updated" {
            use db = PostgresDb.BuildDb()

            let! before = Count.all PostgresDb.TableName
            Expect.equal before 0 "There should have been no documents returned"
            
            // This not raising an exception is the test
            do! Patch.byContains PostgresDb.TableName {| Value = "burgundy" |} {| Foo = "green" |}
        }
    ]
    testList "byJsonPath" [
        testTask "succeeds when a document is updated" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()
            
            do! Patch.byJsonPath PostgresDb.TableName "$.NumValue ? (@ > 10)" {| NumValue = 1000 |}
            let! after = Count.byJsonPath PostgresDb.TableName "$.NumValue ? (@ > 999)"
            Expect.equal after 2 "There should have been 2 documents returned"
        }
        testTask "succeeds when no document is updated" {
            use db = PostgresDb.BuildDb()

            let! before = Count.all PostgresDb.TableName
            Expect.equal before 0 "There should have been no documents returned"
            
            // This not raising an exception is the test
            do! Patch.byJsonPath PostgresDb.TableName "$.NumValue ? (@ < 0)" {| Foo = "green" |}
        }
    ]
]

/// Integration tests for the RemoveFields module of the PostgreSQL library
let removeFieldsTests = testList "RemoveFields" [
    testList "byId" [
        testTask "succeeds when multiple fields are removed" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! RemoveFields.byId PostgresDb.TableName "two" [ "Sub"; "Value" ]
            let! noSubs = Count.byFields PostgresDb.TableName Any [ Field.NotExists "Sub" ]
            Expect.equal noSubs 4 "There should now be 4 documents without Sub fields"
            let! noValue = Count.byFields PostgresDb.TableName Any [ Field.NotExists "Value" ]
            Expect.equal noValue 1 "There should be 1 document without Value fields"
        }
        testTask "succeeds when a single field is removed" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! RemoveFields.byId PostgresDb.TableName "two" [ "Sub" ]
            let! noSubs = Count.byFields PostgresDb.TableName Any [ Field.NotExists "Sub" ]
            Expect.equal noSubs 4 "There should now be 4 documents without Sub fields"
            let! noValue = Count.byFields PostgresDb.TableName Any [ Field.NotExists "Value" ]
            Expect.equal noValue 0 "There should be no documents without Value fields"
        }
        testTask "succeeds when a field is not removed" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()
                
            // This not raising an exception is the test
            do! RemoveFields.byId PostgresDb.TableName "two" [ "AFieldThatIsNotThere" ]
        }
        testTask "succeeds when no document is matched" {
            use db = PostgresDb.BuildDb()
            
            // This not raising an exception is the test
            do! RemoveFields.byId PostgresDb.TableName "two" [ "Value" ]
        }
    ]
    testList "byFields" [
        testTask "succeeds when multiple fields are removed" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! RemoveFields.byFields PostgresDb.TableName Any [ Field.Equal "NumValue" 17 ] [ "Sub"; "Value" ]
            let! noSubs = Count.byFields PostgresDb.TableName Any [ Field.NotExists "Sub" ]
            Expect.equal noSubs 4 "There should now be 4 documents without Sub fields"
            let! noValue = Count.byFields PostgresDb.TableName Any [ Field.NotExists "Value" ]
            Expect.equal noValue 1 "There should be 1 document without Value fields"
        }
        testTask "succeeds when a single field is removed" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! RemoveFields.byFields PostgresDb.TableName Any [ Field.Equal "NumValue" 17 ] [ "Sub" ]
            let! noSubs = Count.byFields PostgresDb.TableName Any [ Field.NotExists "Sub" ]
            Expect.equal noSubs 4 "There should now be 4 documents without Sub fields"
            let! noValue = Count.byFields PostgresDb.TableName Any [ Field.NotExists "Value" ]
            Expect.equal noValue 0 "There should be no documents without Value fields"
        }
        testTask "succeeds when a field is not removed" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()
                
            // This not raising an exception is the test
            do! RemoveFields.byFields PostgresDb.TableName Any [ Field.Equal "NumValue" 17 ] [ "Nothing" ]
        }
        testTask "succeeds when no document is matched" {
            use db = PostgresDb.BuildDb()
            
            // This not raising an exception is the test
            do! RemoveFields.byFields PostgresDb.TableName Any [ Field.NotEqual "Abracadabra" "apple" ] [ "Value" ]
        }
    ]
    testList "byContains" [
        testTask "succeeds when multiple fields are removed" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! RemoveFields.byContains PostgresDb.TableName {| NumValue = 17 |} [ "Sub"; "Value" ]
            let! noSubs = Count.byFields PostgresDb.TableName Any [ Field.NotExists "Sub" ]
            Expect.equal noSubs 4 "There should now be 4 documents without Sub fields"
            let! noValue = Count.byFields PostgresDb.TableName Any [ Field.NotExists "Value" ]
            Expect.equal noValue 1 "There should be 1 document without Value fields"
        }
        testTask "succeeds when a single field is removed" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! RemoveFields.byContains PostgresDb.TableName {| NumValue = 17 |} [ "Sub" ]
            let! noSubs = Count.byFields PostgresDb.TableName Any [ Field.NotExists "Sub" ]
            Expect.equal noSubs 4 "There should now be 4 documents without Sub fields"
            let! noValue = Count.byFields PostgresDb.TableName Any [ Field.NotExists "Value" ]
            Expect.equal noValue 0 "There should be no documents without Value fields"
        }
        testTask "succeeds when a field is not removed" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()
                
            // This not raising an exception is the test
            do! RemoveFields.byContains PostgresDb.TableName {| NumValue = 17 |} [ "Nothing" ]
        }
        testTask "succeeds when no document is matched" {
            use db = PostgresDb.BuildDb()
            
            // This not raising an exception is the test
            do! RemoveFields.byContains PostgresDb.TableName {| Abracadabra = "apple" |} [ "Value" ]
        }
    ]
    testList "byJsonPath" [
        testTask "succeeds when multiple fields are removed" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! RemoveFields.byJsonPath PostgresDb.TableName "$.NumValue ? (@ == 17)" [ "Sub"; "Value" ]
            let! noSubs = Count.byFields PostgresDb.TableName Any [ Field.NotExists "Sub" ]
            Expect.equal noSubs 4 "There should now be 4 documents without Sub fields"
            let! noValue = Count.byFields PostgresDb.TableName Any [ Field.NotExists "Value" ]
            Expect.equal noValue 1 "There should be 1 document without Value fields"
        }
        testTask "succeeds when a single field is removed" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! RemoveFields.byJsonPath PostgresDb.TableName "$.NumValue ? (@ == 17)" [ "Sub" ]
            let! noSubs = Count.byFields PostgresDb.TableName Any [ Field.NotExists "Sub" ]
            Expect.equal noSubs 4 "There should now be 4 documents without Sub fields"
            let! noValue = Count.byFields PostgresDb.TableName Any [ Field.NotExists "Value" ]
            Expect.equal noValue 0 "There should be no documents without Value fields"
        }
        testTask "succeeds when a field is not removed" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()
                
            // This not raising an exception is the test
            do! RemoveFields.byJsonPath PostgresDb.TableName "$.NumValue ? (@ == 17)" [ "Nothing" ]
        }
        testTask "succeeds when no document is matched" {
            use db = PostgresDb.BuildDb()
            
            // This not raising an exception is the test
            do! RemoveFields.byJsonPath PostgresDb.TableName "$.Abracadabra ? (@ == \"apple\")" [ "Value" ]
        }
    ]
]

/// Integration tests for the Delete module of the PostgreSQL library
let deleteTests = testList "Delete" [
    testList "byId" [
        testTask "succeeds when a document is deleted" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! Delete.byId PostgresDb.TableName "four"
            let! remaining = Count.all PostgresDb.TableName
            Expect.equal remaining 4 "There should have been 4 documents remaining"
        }
        testTask "succeeds when a document is not deleted" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! Delete.byId PostgresDb.TableName "thirty"
            let! remaining = Count.all PostgresDb.TableName
            Expect.equal remaining 5 "There should have been 5 documents remaining"
        }
    ]
    testList "byFields" [
        testTask "succeeds when documents are deleted" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! Delete.byFields PostgresDb.TableName Any [ Field.Equal "Value" "purple" ]
            let! remaining = Count.all PostgresDb.TableName
            Expect.equal remaining 3 "There should have been 3 documents remaining"
        }
        testTask "succeeds when documents are not deleted" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! Delete.byFields PostgresDb.TableName Any [ Field.Equal "Value" "crimson" ]
            let! remaining = Count.all PostgresDb.TableName
            Expect.equal remaining 5 "There should have been 5 documents remaining"
        }
    ]
    testList "byContains" [
        testTask "succeeds when documents are deleted" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! Delete.byContains PostgresDb.TableName {| Value = "purple" |}
            let! remaining = Count.all PostgresDb.TableName
            Expect.equal remaining 3 "There should have been 3 documents remaining"
        }
        testTask "succeeds when documents are not deleted" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! Delete.byContains PostgresDb.TableName {| Value = "crimson" |}
            let! remaining = Count.all PostgresDb.TableName
            Expect.equal remaining 5 "There should have been 5 documents remaining"
        }
    ]
    testList "byJsonPath" [
        testTask "succeeds when documents are deleted" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! Delete.byJsonPath PostgresDb.TableName """$.Sub.Foo ? (@ == "green")"""
            let! remaining = Count.all PostgresDb.TableName
            Expect.equal remaining 3 "There should have been 3 documents remaining"
        }
        testTask "succeeds when documents are not deleted" {
            use db = PostgresDb.BuildDb()
            do! loadDocs ()

            do! Delete.byJsonPath PostgresDb.TableName "$.NumValue ? (@ > 100)"
            let! remaining = Count.all PostgresDb.TableName
            Expect.equal remaining 5 "There should have been 5 documents remaining"
        }
    ]
]

/// All tests for the PostgreSQL library
let all = testList "Postgres" [
    testList "Unit" [ parametersTests; queryTests ]
    testSequenced <| testList "Integration" [
        configurationTests
        customTests
        definitionTests
        documentTests
        countTests
        existsTests
        findTests
        updateTests
        patchTests
        removeFieldsTests
        deleteTests
    ]
]