From 076ccd19770ac631d60d0366db3d4658308ce999 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Fri, 17 Jul 2026 19:31:27 +0000
Subject: [PATCH] Add StringExtensions unit tests

Co-authored-by: johnstrand <11484777+johnstrand@users.noreply.github.com>
---
 .../Extensions/StringExtensionsTests.cs       | 56 +++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 tests/GameUtils.Tests/Extensions/StringExtensionsTests.cs

diff --git a/tests/GameUtils.Tests/Extensions/StringExtensionsTests.cs b/tests/GameUtils.Tests/Extensions/StringExtensionsTests.cs
new file mode 100644
index 0000000..404fa2c
--- /dev/null
+++ b/tests/GameUtils.Tests/Extensions/StringExtensionsTests.cs
@@ -0,0 +1,56 @@
+using System;
+using GameUtils.Extensions;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace GameUtils.Tests.Extensions;
+
+[TestClass]
+public class StringExtensionsTests
+{
+    [TestMethod]
+    [DataRow("hello", 0, true, 'h')]
+    [DataRow("hello", 4, true, 'o')]
+    [DataRow("hello", -1, false, '\0')]
+    [DataRow("hello", 5, false, '\0')]
+    [DataRow("", 0, false, '\0')]
+    public void TryGet_ReturnsExpectedResult(string str, int index, bool expectedReturn, char expectedChar)
+    {
+        var result = str.TryGet(index, out char c);
+        Assert.AreEqual(expectedReturn, result);
+        Assert.AreEqual(expectedChar, c);
+    }
+
+    [TestMethod]
+    public void TryGet_NullString_ThrowsArgumentNullException()
+    {
+        string str = null!;
+        Assert.ThrowsExactly<ArgumentNullException>(() => str.TryGet(0, out _));
+    }
+
+    [TestMethod]
+    [DataRow("hello", 3, "hellohellohello")]
+    [DataRow("a", 5, "aaaaa")]
+    [DataRow("abc", 1, "abc")]
+    [DataRow("test", 0, "")]
+    [DataRow("", 5, "")]
+    [DataRow("", 0, "")]
+    public void Repeat_ReturnsExpectedResult(string str, int count, string expectedResult)
+    {
+        var result = str.Repeat(count);
+        Assert.AreEqual(expectedResult, result);
+    }
+
+    [TestMethod]
+    public void Repeat_NullString_ThrowsArgumentNullException()
+    {
+        string str = null!;
+        Assert.ThrowsExactly<ArgumentNullException>(() => str.Repeat(5));
+    }
+
+    [TestMethod]
+    public void Repeat_NegativeCount_ThrowsArgumentOutOfRangeException()
+    {
+        string str = "test";
+        Assert.ThrowsExactly<ArgumentOutOfRangeException>(() => str.Repeat(-1));
+    }
+}