Add a decoder for System.Uri. (#8)

src/Symbolica.Extensions.Configuration.FSharp/Decode.fs

@@ -1,5 +1,7 @@
 namespace Symbolica.Extensions.Configuration.FSharp
 
+open System
+
 /// <summary>
 /// A function that takes a value and returns a <see cref="Binder"/> which evaluates to <c>Success</c> if the
 /// value can be decoded otherwise <c>Failure</c>.
@@ -35,31 +37,34 @@ module Decode =
                         Failure [ $"Could not decode '{value}' at path '{section |> path}' as type '{typeof<'parsed>}'." ])
 
     /// <summary>A <see cref="Decoder" /> for <see cref="System.Boolean" /> values.</summary>
-    let bool = ofParser System.Boolean.TryParse
+    let bool = ofParser Boolean.TryParse
 
     /// <summary>A <see cref="Decoder" /> for <see cref="System.Char" /> values.</summary>
-    let char = ofParser System.Char.TryParse
+    let char = ofParser Char.TryParse
 
     /// <summary>A <see cref="Decoder" /> for <see cref="System.DateTime" /> values.</summary>
-    let dateTime = ofParser System.DateTime.TryParse
+    let dateTime = ofParser DateTime.TryParse
 
     /// <summary>A <see cref="Decoder" /> for <see cref="System.Double" /> values.</summary>
-    let float = ofParser System.Double.TryParse
+    let float = ofParser Double.TryParse
 
     /// <summary>A <see cref="Decoder" /> for <see cref="System.Int16" /> values.</summary>
-    let int16 = ofParser System.Int16.TryParse
+    let int16 = ofParser Int16.TryParse
 
     /// <summary>A <see cref="Decoder" /> for <see cref="System.Int32" /> values.</summary>
-    let int = ofParser System.Int32.TryParse
+    let int = ofParser Int32.TryParse
 
     /// <summary>A <see cref="Decoder" /> for <see cref="System.Int64" /> values.</summary>
-    let int64 = ofParser System.Int64.TryParse
+    let int64 = ofParser Int64.TryParse
 
     /// <summary>A <see cref="Decoder" /> for <see cref="System.UInt16" /> values.</summary>
-    let uint16 = ofParser System.UInt16.TryParse
+    let uint16 = ofParser UInt16.TryParse
 
     /// <summary>A <see cref="Decoder" /> for <see cref="System.UInt32" /> values.</summary>
-    let uint = ofParser System.UInt32.TryParse
+    let uint = ofParser UInt32.TryParse
 
     /// <summary>A <see cref="Decoder" /> for <see cref="System.UInt64" /> values.</summary>
-    let uint64 = ofParser System.UInt64.TryParse
+    let uint64 = ofParser UInt64.TryParse
+
+    /// <summary>A <see cref="Decoder" /> for <see cref="System.Uri" /> values of the specified <see cref="System.UriKind" />.</summary>
+    let uri kind = ofParser (fun s -> Uri.TryCreate(s, kind))

tests/Symbolica.Extensions.Configuration.FSharp.Tests/DecodeTests.fs

@@ -3,6 +3,7 @@ namespace Symbolica.Extensions.Configuration.FSharp
 open FsCheck
 open FsCheck.Xunit
 open Swensen.Unquote
+open global.Xunit
 
 module Decode =
     module Bool =
@@ -192,3 +193,31 @@ module Decode =
                    |> Binder.eval (SectionStub.Empty path) = Failure(
                     [ $"Could not decode 'string' at path '{path}' as type 'System.UInt64'." ]
                 ) @>
+
+    module Uri =
+        [<Property>]
+        let ``should be Success value if can be converted to absolute uri`` (HostName host) =
+            let value = System.Uri($"https://{host}")
+            test
+                <@ value
+                   |> string
+                   |> Decode.uri System.UriKind.Absolute
+                   |> Binder.eval (SectionStub.Empty "") = Success(value) @>
+
+       [<Fact>]
+       let ``should be Success value if can be converted to relative uri`` =
+           let value = System.Uri("/relative/uri", System.UriKind.Relative)
+           test
+               <@ value
+                  |> string
+                  |> Decode.uri System.UriKind.Relative
+                  |> Binder.eval (SectionStub.Empty "") = Success(value) @>
+
+        [<Property>]
+        let ``should be Failure if string can not be converted to uri`` path =
+            test
+                <@ "string"
+                   |> Decode.uri System.UriKind.Absolute
+                   |> Binder.eval (SectionStub.Empty path) = Failure(
+                    [ $"Could not decode 'string' at path '{path}' as type 'System.Uri'." ]
+                ) @>