Add missing test for ChangeExtension

Testably · Apr 16, 2024 · 75396c7 · 75396c7
1 parent 1599ebb
commit 75396c7
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Showing 2 changed files with 14 additions and 1 deletion.
diff --git a/Source/Testably.Abstractions.Testing/Helpers/Execute.SimulatedPath.cs b/Source/Testably.Abstractions.Testing/Helpers/Execute.SimulatedPath.cs
@@ -43,7 +43,7 @@ private abstract class SimulatedPath(MockFileSystem fileSystem) : IPath
 
 			if (extension == null)
 			{
-				extension ??= "";
+				extension = "";
 			}
 			else if (!extension.StartsWith('.'))
 			{

diff --git a/Tests/Testably.Abstractions.Tests/FileSystem/Path/ChangeExtensionTests.cs b/Tests/Testably.Abstractions.Tests/FileSystem/Path/ChangeExtensionTests.cs
@@ -64,6 +64,19 @@ public void ChangeExtension_WithDotOnlyInDirectory_ShouldAppendExtensionToPath(
 		result.Should().Be(expectedResult);
 	}
 
+	[SkippableTheory]
+	[AutoData]
+	public void ChangeExtension_WithFileStartingWithDot_ShouldAppendExtensionToPath(
+		string fileName, string extension)
+	{
+		string path = $".{fileName}";
+		string expectedResult = $".{extension}";
+
+		string result = FileSystem.Path.ChangeExtension(path, extension);
+
+		result.Should().Be(expectedResult);
+	}
+
 	[SkippableTheory]
 	[AutoData]
 	public void ChangeExtension_WithLeadingDotInExtension_ShouldNotIncludeTwoDots(