Add polyfill for the string.Contains(char, StringComparison) method (…

…#4)
Tyrrrz · Dec 31, 2023 · ea974cf · ea974cf
1 parent bfacdc2
commit ea974cf
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Showing 2 changed files with 16 additions and 1 deletion.
diff --git a/PolyShim.Tests/NetCore21/StringTests.cs b/PolyShim.Tests/NetCore21/StringTests.cs
@@ -7,7 +7,18 @@ namespace PolyShim.Tests.NetCore21;
 public class StringTests
 {
     [Fact]
-    public void Contains_Test()
+    public void Contains_Char_Test()
+    {
+        // Arrange
+        const string str = "abc";
+
+        // Act & assert
+        str.Contains('B', StringComparison.OrdinalIgnoreCase).Should().BeTrue();
+        str.Contains('B', StringComparison.Ordinal).Should().BeFalse();
+    }
+
+    [Fact]
+    public void Contains_String_Test()
     {
         // Arrange
         const string str = "abc";

diff --git a/PolyShim/NetCore21/String.cs b/PolyShim/NetCore21/String.cs
@@ -9,6 +9,10 @@
 
 internal static partial class PolyfillExtensions
 {
+    // https://learn.microsoft.com/en-us/dotnet/api/system.string.contains#system-string-contains(system-char-system-stringcomparison)
+    public static bool Contains(this string str, char c, StringComparison comparison) =>
+        str.Contains(c.ToString(), comparison);
+
     // https://learn.microsoft.com/en-us/dotnet/api/system.string.contains#system-string-contains(system-string-system-stringcomparison)
     public static bool Contains(this string str, string sub, StringComparison comparison) =>
         str.IndexOf(sub, comparison) >= 0;