[Tests -> Extensions] Add string extensions tests.

Source/SammBot.Tests/Extensions/StringExtensionsTests.cs

@@ -0,0 +1,71 @@
+#region License Information (GPLv3)
+// Samm-Bot - A lightweight Discord.NET bot for moderation and other purposes.
+// Copyright (C) 2021-2024 Analog Feelings
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#endregion
+
+using SammBot.Library.Extensions;
+
+namespace SammBot.Tests.Extensions;
+
+[TestClass]
+public class StringExtensionsTests
+{
+    [TestMethod]
+    public void TruncateTest()
+    {
+        string actual = "Lorem ipsum dolor sit amet".Truncate(11);
+        string expected = "Lorem ipsum...";
+
+        Assert.IsTrue(actual == expected, $"Expected \"{expected}\", got \"{actual}\".");
+    }
+
+    [TestMethod]
+    public void CountryCodeToFlagTest()
+    {
+        string actualFirst = "ES".CountryCodeToFlag();
+        string expectedFirst = "\U0001f1ea\U0001f1f8";
+
+        Assert.IsTrue(actualFirst == expectedFirst, $"Expected \"{expectedFirst}\", got \"{actualFirst}\".");
+
+        string actualSecond = "US".CountryCodeToFlag();
+        string expectedSecond = "\U0001f1fa\U0001f1f8";
+
+        Assert.IsTrue(actualSecond == expectedSecond, $"Expected \"{expectedSecond}\", got \"{actualSecond}\".");
+    }
+
+    [TestMethod]
+    public void CapitalizeFirstTest()
+    {
+        string actual = "lorem ipsum".CapitalizeFirst();
+        string expected = "Lorem ipsum";
+
+        Assert.IsTrue(actual == expected, $"Expected \"{expected}\", got \"{actual}\".");
+    }
+
+    [TestMethod]
+    public void DamerauDistanceTest()
+    {
+        int actualFirst = "lorem psum".DamerauDistance("lorem ipsum", 3);
+        int expectedFirst = 1;
+
+        Assert.IsTrue(actualFirst == expectedFirst, $"Expected {expectedFirst}, got {actualFirst}.");
+
+        int actualSecond = "loren ipun".DamerauDistance("lorem ipsum", 2);
+        int expectedSecond = int.MaxValue;
+
+        Assert.IsTrue(actualSecond == expectedSecond, $"Expected {expectedSecond}, got {actualSecond}.");
+    }
+}