Add tests for DataTypes

src/MyWebLog.Domain/DataTypes.fs

@@ -381,8 +381,12 @@ type WebLog = {
     /// Any extra path where this web log is hosted (blank if web log is hosted at the root of the domain)
     [<JsonIgnore>]
     member this.ExtraPath =
-        let path = this.UrlBase.Split("://").[1].Split "/"
-        if path.Length > 1 then $"""/{String.Join("/", path |> Array.skip 1)}""" else ""
+        let pathParts = this.UrlBase.Split("://")
+        if pathParts.Length < 2 then
+            ""
+        else
+            let path = pathParts[1].Split "/"
+            if path.Length > 1 then $"""/{String.Join("/", path |> Array.skip 1)}""" else ""
     
     /// Generate an absolute URL for the given link
     member this.AbsoluteUrl(permalink: Permalink) =
@@ -394,7 +398,7 @@ type WebLog = {
     
     /// Convert an Instant (UTC reference) to the web log's local date/time
     member this.LocalTime(date: Instant) =
-        match DateTimeZoneProviders.Tzdb[this.TimeZone] with
+        match DateTimeZoneProviders.Tzdb.GetZoneOrNull this.TimeZone with
         | null -> date.ToDateTimeUtc()
         | tz -> date.InZone(tz).ToDateTimeUnspecified()
 
@@ -454,5 +458,5 @@ type WebLogUser = {
     /// Get the user's displayed name
     [<JsonIgnore>]
     member this.DisplayName =
-        (seq { match this.PreferredName with "" -> this.FirstName | n -> n; " "; this.LastName }
+        (seq { (match this.PreferredName with "" -> this.FirstName | n -> n); " "; this.LastName }
          |> Seq.reduce (+)).Trim()

src/MyWebLog.Tests/Domain.fs

@@ -5,6 +5,8 @@ open Expecto
 open MyWebLog
 open NodaTime
 
+// --- SUPPORT TYPES ---
+
 /// Tests for the NodaTime-wrapping module
 let nodaTests =
     testList "Noda" [
@@ -398,7 +400,7 @@ let uploadDestinationTests =
                 Expect.equal (UploadDestination.Parse "Database") Database "\"Database\" not parsed correctly"
             }
             test "succeeds for \"Disk\"" {
-                Expect.equal (UploadDestination.Parse "Disk") Database "\"Disk\" not parsed correctly"
+                Expect.equal (UploadDestination.Parse "Disk") Disk "\"Disk\" not parsed correctly"
             }
             test "fails for unrecognized value" {
                 Expect.throwsT<ArgumentException>
@@ -415,11 +417,96 @@ let uploadDestinationTests =
         ]
     ]
 
+// --- DATA TYPES ---
+
+/// Unit tests for the WebLog type
+let webLogTests =
+    testList "WebLog" [
+        testList "ExtraPath" [
+            test "succeeds for blank URL base" {
+                Expect.equal WebLog.Empty.ExtraPath "" "Extra path should have been blank for blank URL base"
+            }
+            test "succeeds for domain root URL" {
+                Expect.equal
+                    { WebLog.Empty with UrlBase = "https://example.com" }.ExtraPath
+                    ""
+                    "Extra path should have been blank for domain root"
+            }
+            test "succeeds for single subdirectory" {
+                Expect.equal
+                    { WebLog.Empty with UrlBase = "http://a.com/subdir" }.ExtraPath
+                    "/subdir"
+                    "Extra path incorrect for a single subdirectory"
+            }
+            test "succeeds for deeper nesting" {
+                Expect.equal
+                    { WebLog.Empty with UrlBase = "http://b.com/users/test/units" }.ExtraPath
+                    "/users/test/units"
+                    "Extra path incorrect for deeper nesting"
+            }
+        ]
+        test "AbsoluteUrl succeeds" {
+            Expect.equal
+                ({ WebLog.Empty with UrlBase = "http://my.site" }.AbsoluteUrl(Permalink "blog/page.html"))
+                "http://my.site/blog/page.html"
+                "Absolute URL is incorrect"
+        }
+        testList "RelativeUrl" [
+            test "succeeds for domain root URL" {
+                Expect.equal
+                    ({ WebLog.Empty with UrlBase = "http://test.me" }.RelativeUrl(Permalink "about.htm"))
+                    "/about.htm"
+                    "Relative URL is incorrect for domain root site"
+            }
+            test "succeeds for domain non-root URL" {
+                Expect.equal
+                    ({ WebLog.Empty with UrlBase = "http://site.page/a/b/c" }.RelativeUrl(Permalink "x/y/z"))
+                    "/a/b/c/x/y/z"
+                    "Relative URL is incorrect for domain non-root site"
+            }
+        ]
+        testList "LocalTime" [
+            test "succeeds when no time zone is set" {
+                Expect.equal
+                    (WebLog.Empty.LocalTime(Noda.epoch))
+                    (Noda.epoch.ToDateTimeUtc())
+                    "Reference should be UTC when no time zone is specified"
+            }
+            test "succeeds when time zone is set" {
+                Expect.equal
+                    ({ WebLog.Empty with TimeZone = "Etc/GMT-1" }.LocalTime(Noda.epoch))
+                    (Noda.epoch.ToDateTimeUtc().AddHours 1)
+                    "The time should have been adjusted by one hour"
+            }
+        ]
+    ]
+
+/// Unit tests for the WebLogUser type
+let webLogUserTests =
+    testList "WebLogUser" [
+        testList "DisplayName" [
+            test "succeeds when a preferred name is present" {
+                Expect.equal
+                    { WebLogUser.Empty with
+                        FirstName = "Thomas"; PreferredName = "Tom"; LastName = "Tester" }.DisplayName
+                    "Tom Tester"
+                    "Display name incorrect when preferred name is present"
+            }
+            test "succeeds when a preferred name is absent" {
+                Expect.equal
+                    { WebLogUser.Empty with FirstName = "Test"; LastName = "Units" }.DisplayName
+                    "Test Units"
+                    "Display name incorrect when preferred name is absent"
+            }
+        ]
+    ]
+
 /// All tests for the Domain namespace
 let all =
     testList
         "Domain"
-        [ nodaTests
+        [ // support types
+          nodaTests
           accessLevelTests
           commentStatusTests
           explicitRatingTests
@@ -429,4 +516,7 @@ let all =
           postStatusTests
           customFeedSourceTests
           themeAssetIdTests
-          uploadDestinationTests ]
+          uploadDestinationTests
+          // data types
+          webLogTests
+          webLogUserTests ]