Add Suspect utils #9

src/Pyxpecto.fs

@@ -114,7 +114,7 @@ open TranspilerHelper
 module Assert =
     module NET =
 
-        let private firstDiff s1 s2 =
+        let firstDiff s1 s2 =
             let s1 = Seq.append (Seq.map Some s1) (Seq.initInfinite (fun _ -> None))
             let s2 = Seq.append (Seq.map Some s2) (Seq.initInfinite (fun _ -> None))
             Seq.mapi2 (fun i s p -> i,s,p) s1 s2
@@ -491,6 +491,37 @@ module Expect =
     let floatGreaterThanOrClose accuracy actual expected message =
         if actual<expected then floatClose accuracy actual expected message
 
+
+/// This module contains assertion helpers which are Fable.Pyxpecto specific. They cannot be used in combination with Mocha and Expecto.
+[<RequireQualifiedAccess>]
+module Suspect =
+
+    /// <summary>
+    /// This function only verifies non-whitespace characters
+    /// </summary>
+    let stringEqual actual expected message =
+        let pattern = @"\s+"
+        let regex = System.Text.RegularExpressions.Regex(pattern, Text.RegularExpressions.RegexOptions.Singleline)
+        let actual = regex.Replace(actual, "")
+        let expected = regex.Replace(expected, "")
+        Expect.equal actual expected message
+
+    /// Expects the `actual` sequence to equal the `expected` one.
+    let sequenceEqual actual expected message =
+        match Assert.NET.firstDiff actual expected with
+        | _,None,None -> ()
+        | i,Some a, Some e ->
+            failtestf "%s. Sequence does not match at position %i. Expected item: %O, but got %O."
+                message i e a
+        | i,None,Some e ->
+            failtestf "%s. Sequence actual shorter than expected, at pos %i for expected item %O."
+                message i e
+        | i,Some a,None ->
+            failtestf "%s. Sequence actual longer than expected, at pos %i found item %O."
+                message i a
+
+    let fail message = failtestf "Test failed! %s" message
+
 type Language =
 | TypeScript
 | Python