1 files changed, 43 insertions, 0 deletions
diff --git a/tests/Jellyfin.Common.Tests/Extensions/StringExtensionsTests.cs b/tests/Jellyfin.Common.Tests/Extensions/StringExtensionsTests.cs
new file mode 100644
index 000000000..8bf613f05
--- /dev/null
+++ b/tests/Jellyfin.Common.Tests/Extensions/StringExtensionsTests.cs
@@ -0,0 +1,43 @@
+using System;
+using MediaBrowser.Common.Extensions;
+using Xunit;
+
+namespace Jellyfin.Common.Tests.Extensions
+{
+    public class StringExtensionsTests
+    {
+        [Theory]
+        [InlineData("", 'q', "")]
+        [InlineData("Banana split", ' ', "Banana")]
+        [InlineData("Banana split", 'q', "Banana split")]
+        public void LeftPart_ValidArgsCharNeedle_Correct(string str, char needle, string expectedResult)
+        {
+            var result = str.AsSpan().LeftPart(needle).ToString();
+            Assert.Equal(expectedResult, result);
+        }
+
+        [Theory]
+        [InlineData("", "", "")]
+        [InlineData("", "q", "")]
+        [InlineData("Banana split", "", "")]
+        [InlineData("Banana split", " ", "Banana")]
+        [InlineData("Banana split test", " split", "Banana")]
+        public void LeftPart_ValidArgsWithoutStringComparison_Correct(string str, string needle, string expectedResult)
+        {
+            var result = str.AsSpan().LeftPart(needle).ToString();
+            Assert.Equal(expectedResult, result);
+        }
+
+        [Theory]
+        [InlineData("", "", StringComparison.Ordinal, "")]
+        [InlineData("Banana split", " ", StringComparison.Ordinal, "Banana")]
+        [InlineData("Banana split test", " split", StringComparison.Ordinal, "Banana")]
+        [InlineData("Banana split test", " Split", StringComparison.Ordinal, "Banana split test")]
+        [InlineData("Banana split test", " Splït", StringComparison.InvariantCultureIgnoreCase, "Banana split test")]
+        public void LeftPart_ValidArgs_Correct(string str, string needle, StringComparison stringComparison, string expectedResult)
+        {
+            var result = str.AsSpan().LeftPart(needle, stringComparison).ToString();
+            Assert.Equal(expectedResult, result);
+        }
+    }
+}