module PostgresTests

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

/// Tests which do not hit the database
let unitTests =
    testList "Unit" [
        testList "Parameters" [
            test "idParam succeeds" {
                Expect.equal (idParam 88) ("@id", Sql.string "88") "ID parameter not constructed correctly"
            }
            test "jsonParam succeeds" {
                Expect.equal
                    (jsonParam "@test" {| Something = "good" |})
                    ("@test", Sql.jsonb """{"Something":"good"}""")
                    "JSON parameter not constructed correctly"
            }
            testList "addFieldParam" [
                test "succeeds when a parameter is added" {
                    let paramList = addFieldParam "@field" (Field.EQ "it" "242") []
                    Expect.hasLength paramList 1 "There should have been a parameter added"
                    let it = paramList[0]
                    Expect.equal (fst it) "@field" "Field parameter name not correct"
                    match snd it with
                    | SqlValue.Parameter value ->
                        Expect.equal value.ParameterName "@field" "Parameter name not correct"
                        Expect.equal value.Value "242" "Parameter value not correct"
                    | _ -> Expect.isTrue false "The parameter was not a Parameter type"
                }
                test "succeeds when a parameter is not added" {
                    let paramList = addFieldParam "@field" (Field.EX "tacos") []
                    Expect.isEmpty paramList "There should not have been any parameters added"
                }
                test "succeeds when two parameters are added" {
                    let paramList = addFieldParam "@field" (Field.BT "that" "eh" "zed") []
                    Expect.hasLength paramList 2 "There should have been 2 parameters added"
                    let min = paramList[0]
                    Expect.equal (fst min) "@fieldmin" "Minimum field name not correct"
                    match snd min with
                    | SqlValue.Parameter value ->
                        Expect.equal value.ParameterName "@fieldmin" "Minimum parameter name not correct"
                        Expect.equal value.Value "eh" "Minimum parameter value not correct"
                    | _ -> Expect.isTrue false "Minimum parameter was not a Parameter type"
                    let max = paramList[1]
                    Expect.equal (fst max) "@fieldmax" "Maximum field name not correct"
                    match snd max with
                    | SqlValue.Parameter value ->
                        Expect.equal value.ParameterName "@fieldmax" "Maximum parameter name not correct"
                        Expect.equal value.Value "zed" "Maximum parameter value not correct"
                    | _ -> Expect.isTrue false "Maximum parameter was not a Parameter type"
                }
            ]
            test "noParams succeeds" {
                Expect.isEmpty noParams "The no-params sequence should be empty"
            }
        ]
        testList "Query" [
            testList "whereByField" [
                test "succeeds when a logical operator is passed" {
                    Expect.equal
                        (Query.whereByField (Field.GT "theField" 0) "@test")
                        "data->>'theField' > @test"
                        "WHERE clause not correct"
                }
                test "succeeds when an existence operator is passed" {
                    Expect.equal
                        (Query.whereByField (Field.NEX "thatField") "")
                        "data->>'thatField' IS NULL"
                        "WHERE clause not correct"
                }
                test "succeeds when a between operator is passed with numeric values" {
                    Expect.equal
                        (Query.whereByField (Field.BT "aField" 50 99) "@range")
                        "(data->>'aField')::numeric BETWEEN @rangemin AND @rangemax"
                        "WHERE clause not correct"
                }
                test "succeeds when a between operator is passed with non-numeric values" {
                    Expect.equal
                        (Query.whereByField (Field.BT "field0" "a" "b") "@alpha")
                        "data->>'field0' BETWEEN @alphamin AND @alphamax"
                        "WHERE clause not correct"
                }
            ]
            test "whereById succeeds" {
                Expect.equal (Query.whereById "@id") "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 "update succeeds" {
                Expect.equal
                    (Query.update PostgresDb.TableName)
                    $"UPDATE {PostgresDb.TableName} SET data = @data WHERE data->>'Id' = @id"
                    "UPDATE full statement not correct"
            }
            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"
            }
            testList "Count" [
                test "all succeeds" {
                    Expect.equal
                        (Query.Count.all PostgresDb.TableName)
                        $"SELECT COUNT(*) AS it FROM {PostgresDb.TableName}"
                        "Count query not correct"
                }
                test "byField succeeds" {
                    Expect.equal
                        (Query.Count.byField PostgresDb.TableName (Field.EQ "thatField" 0))
                        $"SELECT COUNT(*) AS it FROM {PostgresDb.TableName} WHERE data->>'thatField' = @field"
                        "JSON field text comparison count query not correct"
                }
                test "byContains succeeds" {
                    Expect.equal
                        (Query.Count.byContains PostgresDb.TableName)
                        $"SELECT COUNT(*) AS it FROM {PostgresDb.TableName} WHERE data @> @criteria"
                        "JSON containment count query not correct"
                }
                test "byJsonPath succeeds" {
                    Expect.equal
                        (Query.Count.byJsonPath PostgresDb.TableName)
                        $"SELECT COUNT(*) AS it FROM {PostgresDb.TableName} WHERE data @? @path::jsonpath"
                        "JSON Path match count query not correct"
                }
            ]
            testList "Exists" [
                test "byId succeeds" {
                    Expect.equal
                        (Query.Exists.byId PostgresDb.TableName)
                        $"SELECT EXISTS (SELECT 1 FROM {PostgresDb.TableName} WHERE data->>'Id' = @id) AS it"
                        "ID existence query not correct"
                }
                test "byField succeeds" {
                    Expect.equal
                        (Query.Exists.byField PostgresDb.TableName (Field.LT "Test" 0))
                        $"SELECT EXISTS (SELECT 1 FROM {PostgresDb.TableName} WHERE data->>'Test' < @field) AS it"
                        "JSON field text comparison exists query not correct"
                }
                test "byContains succeeds" {
                    Expect.equal
                        (Query.Exists.byContains PostgresDb.TableName)
                        $"SELECT EXISTS (SELECT 1 FROM {PostgresDb.TableName} WHERE data @> @criteria) AS it"
                        "JSON containment exists query not correct"
                }
                test "byJsonPath succeeds" {
                    Expect.equal
                        (Query.Exists.byJsonPath PostgresDb.TableName)
                        $"SELECT EXISTS (SELECT 1 FROM {PostgresDb.TableName} WHERE data @? @path::jsonpath) AS it"
                        "JSON Path match existence query not correct"
                }
            ]
            testList "Find" [
                test "byId succeeds" {
                    Expect.equal
                        (Query.Find.byId PostgresDb.TableName)
                        $"SELECT data FROM {PostgresDb.TableName} WHERE data->>'Id' = @id"
                        "SELECT by ID query not correct"
                }
                test "byField succeeds" {
                    Expect.equal
                        (Query.Find.byField PostgresDb.TableName (Field.GE "Golf" 0))
                        $"SELECT data FROM {PostgresDb.TableName} WHERE data->>'Golf' >= @field"
                        "SELECT by JSON comparison query not correct"
                }
                test "byContains succeeds" {
                    Expect.equal
                        (Query.Find.byContains PostgresDb.TableName)
                        $"SELECT data FROM {PostgresDb.TableName} WHERE data @> @criteria"
                        "SELECT by JSON containment query not correct"
                }
                test "byJsonPath succeeds" {
                    Expect.equal
                        (Query.Find.byJsonPath PostgresDb.TableName)
                        $"SELECT data FROM {PostgresDb.TableName} WHERE data @? @path::jsonpath"
                        "SELECT by JSON Path match query not correct"
                }
            ]
            testList "Patch" [
                test "byId succeeds" {
                    Expect.equal
                        (Query.Patch.byId PostgresDb.TableName)
                        $"UPDATE {PostgresDb.TableName} SET data = data || @data WHERE data->>'Id' = @id"
                        "UPDATE partial by ID statement not correct"
                }
                test "byField succeeds" {
                    Expect.equal
                        (Query.Patch.byField PostgresDb.TableName (Field.LT "Snail" 0))
                        $"UPDATE {PostgresDb.TableName} SET data = data || @data WHERE data->>'Snail' < @field"
                        "UPDATE partial by ID statement not correct"
                }
                test "byContains succeeds" {
                    Expect.equal
                        (Query.Patch.byContains PostgresDb.TableName)
                        $"UPDATE {PostgresDb.TableName} SET data = data || @data WHERE data @> @criteria"
                        "UPDATE partial by JSON containment statement not correct"
                }
                test "byJsonPath succeeds" {
                    Expect.equal
                        (Query.Patch.byJsonPath PostgresDb.TableName)
                        $"UPDATE {PostgresDb.TableName} SET data = data || @data WHERE data @? @path::jsonpath"
                        "UPDATE partial by JSON Path statement not correct"
                }
            ]
            testList "RemoveFields" [
                test "byId succeeds" {
                    Expect.equal
                        (Query.RemoveFields.byId "tbl")
                        "UPDATE tbl SET data = data - @name WHERE data->>'Id' = @id"
                        "Remove field by ID query not correct"
                }
                test "byField succeeds" {
                    Expect.equal
                        (Query.RemoveFields.byField "tbl" (Field.LT "Fly" 0))
                        "UPDATE tbl SET data = data - @name WHERE data->>'Fly' < @field"
                        "Remove field by field query not correct"
                }
                test "byContains succeeds" {
                    Expect.equal
                        (Query.RemoveFields.byContains "tbl")
                        "UPDATE tbl SET data = data - @name WHERE data @> @criteria"
                        "Remove field by contains query not correct"
                }
                test "byJsonPath succeeds" {
                    Expect.equal
                        (Query.RemoveFields.byJsonPath "tbl")
                        "UPDATE tbl SET data = data - @name WHERE data @? @path::jsonpath"
                        "Remove field by JSON path query not correct"
                }
            ]
            testList "Delete" [
                test "byId succeeds" {
                    Expect.equal
                        (Query.Delete.byId PostgresDb.TableName)
                        $"DELETE FROM {PostgresDb.TableName} WHERE data->>'Id' = @id"
                        "DELETE by ID query not correct"
                }
                test "byField succeeds" {
                    Expect.equal
                        (Query.Delete.byField PostgresDb.TableName (Field.NEX "gone"))
                        $"DELETE FROM {PostgresDb.TableName} WHERE data->>'gone' IS NULL"
                        "DELETE by JSON comparison query not correct"
                }
                test "byContains succeeds" {
                    Expect.equal (Query.Delete.byContains PostgresDb.TableName)
                        $"DELETE FROM {PostgresDb.TableName} WHERE data @> @criteria"
                        "DELETE by JSON containment query not correct"
                }
                test "byJsonPath succeeds" {
                    Expect.equal (Query.Delete.byJsonPath PostgresDb.TableName)
                        $"DELETE FROM {PostgresDb.TableName} WHERE data @? @path::jsonpath"
                        "DELETE by JSON Path match query not correct"
                }
            ]
        ]
    ]

open ThrowawayDb.Postgres
open Types

let isTrue<'T> (_ : 'T) = true

let integrationTests =
    let documents = [
        { Id = "one"; Value = "FIRST!"; NumValue = 0; Sub = None }
        { Id = "two"; Value = "another"; NumValue = 10; Sub = Some { Foo = "green"; Bar = "blue" } }
        { Id = "three"; Value = ""; NumValue = 4; Sub = None }
        { Id = "four"; Value = "purple"; NumValue = 17; Sub = Some { Foo = "green"; Bar = "red" } }
        { Id = "five"; Value = "purple"; NumValue = 18; Sub = None }
    ]
    let loadDocs () = backgroundTask {
        for doc in documents do do! insert PostgresDb.TableName doc
    }
    testList "Integration" [
        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"
            }
        ]
        testList "Custom" [
            testList "list" [
                testTask "succeeds when data is found" {
                    use db = PostgresDb.BuildDb()
                    do! loadDocs ()

                    let! docs = Custom.list (Query.selectFromTable PostgresDb.TableName) [] fromData<JsonDocument>
                    Expect.hasCountOf docs 5u isTrue "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"
            }
        ]
        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"
            }
        ]
        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"
            }
        ]
        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"
            }
        ]
        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"
            }
            testTask "byField succeeds for numeric range" {
                use db = PostgresDb.BuildDb()
                do! loadDocs ()
                
                let! theCount = Count.byField PostgresDb.TableName (Field.BT "NumValue" 10 20)
                Expect.equal theCount 3 "There should have been 3 matching documents"
            }
            testTask "byField succeeds for non-numeric range" {
                use db = PostgresDb.BuildDb()
                do! loadDocs ()
                
                let! theCount = Count.byField PostgresDb.TableName (Field.BT "Value" "aardvark" "apple")
                Expect.equal theCount 1 "There should have been 1 matching document"
            }
            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"
            }
        ]
        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 "byField" [
                testTask "succeeds when documents exist" {
                    use db = PostgresDb.BuildDb()
                    do! loadDocs ()

                    let! exists = Exists.byField PostgresDb.TableName (Field.EX "Sub")
                    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.byField PostgresDb.TableName (Field.EQ "NumValue" "six")
                    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"
                }
            ]
        ]
        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
                    let expected = [
                        { Foo = "one"; Bar = "two" }
                        { Foo = "three"; Bar = "four" }
                        { Foo = "five"; Bar = "six" }
                    ]
                    Expect.equal results expected "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 "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 "byField" [
                testTask "succeeds when documents are found" {
                    use db = PostgresDb.BuildDb()
                    do! loadDocs ()

                    let! docs = Find.byField<JsonDocument> PostgresDb.TableName (Field.EQ "Value" "another")
                    Expect.equal (List.length 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.byField<JsonDocument> PostgresDb.TableName (Field.EQ "Value" "mauve")
                    Expect.isEmpty docs "There should have been no documents returned"
                }
            ]
            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 "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 "firstByField" [
                testTask "succeeds when a document is found" {
                    use db = PostgresDb.BuildDb()
                    do! loadDocs ()

                    let! doc = Find.firstByField<JsonDocument> PostgresDb.TableName (Field.EQ "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.firstByField<JsonDocument> PostgresDb.TableName (Field.EQ "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.firstByField<JsonDocument> PostgresDb.TableName (Field.EQ "Value" "absent")
                    Expect.isNone doc "There should not have been a document 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 "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 "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 }
                }
            ]
        ]
        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 "byField" [
                testTask "succeeds when a document is updated" {
                    use db = PostgresDb.BuildDb()
                    do! loadDocs ()
                    
                    do! Patch.byField PostgresDb.TableName (Field.EQ "Value" "purple") {| NumValue = 77 |}
                    let! after = Count.byField PostgresDb.TableName (Field.EQ "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.byField PostgresDb.TableName (Field.EQ "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" |}
                }
            ]
        ]
        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.byField PostgresDb.TableName (Field.NEX "Sub")
                    Expect.equal noSubs 4 "There should now be 4 documents without Sub fields"
                    let! noValue = Count.byField PostgresDb.TableName (Field.NEX "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.byField PostgresDb.TableName (Field.NEX "Sub")
                    Expect.equal noSubs 4 "There should now be 4 documents without Sub fields"
                    let! noValue = Count.byField PostgresDb.TableName (Field.NEX "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 "byField" [
                testTask "succeeds when multiple fields are removed" {
                    use db = PostgresDb.BuildDb()
                    do! loadDocs ()

                    do! RemoveFields.byField PostgresDb.TableName (Field.EQ "NumValue" "17") [ "Sub"; "Value" ]
                    let! noSubs = Count.byField PostgresDb.TableName (Field.NEX "Sub")
                    Expect.equal noSubs 4 "There should now be 4 documents without Sub fields"
                    let! noValue = Count.byField PostgresDb.TableName (Field.NEX "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.byField PostgresDb.TableName (Field.EQ "NumValue" "17") [ "Sub" ]
                    let! noSubs = Count.byField PostgresDb.TableName (Field.NEX "Sub")
                    Expect.equal noSubs 4 "There should now be 4 documents without Sub fields"
                    let! noValue = Count.byField PostgresDb.TableName (Field.NEX "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.byField PostgresDb.TableName (Field.EQ "NumValue" "17") [ "Nothing" ]
                }
                testTask "succeeds when no document is matched" {
                    use db = PostgresDb.BuildDb()
                    
                    // This not raising an exception is the test
                    do! RemoveFields.byField PostgresDb.TableName (Field.NE "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.byField PostgresDb.TableName (Field.NEX "Sub")
                    Expect.equal noSubs 4 "There should now be 4 documents without Sub fields"
                    let! noValue = Count.byField PostgresDb.TableName (Field.NEX "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.byField PostgresDb.TableName (Field.NEX "Sub")
                    Expect.equal noSubs 4 "There should now be 4 documents without Sub fields"
                    let! noValue = Count.byField PostgresDb.TableName (Field.NEX "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.byField PostgresDb.TableName (Field.NEX "Sub")
                    Expect.equal noSubs 4 "There should now be 4 documents without Sub fields"
                    let! noValue = Count.byField PostgresDb.TableName (Field.NEX "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.byField PostgresDb.TableName (Field.NEX "Sub")
                    Expect.equal noSubs 4 "There should now be 4 documents without Sub fields"
                    let! noValue = Count.byField PostgresDb.TableName (Field.NEX "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" ]
                }
            ]
        ]
        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 "byField" [
                testTask "succeeds when documents are deleted" {
                    use db = PostgresDb.BuildDb()
                    do! loadDocs ()

                    do! Delete.byField PostgresDb.TableName (Field.EQ "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.byField PostgresDb.TableName (Field.EQ "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"
                }
            ]
        ]
    ]
    |> testSequenced


let all = testList "Postgres" [ unitTests; integrationTests ]