[#0165]feat(leetcode): Init project, add C# solution, unit test and README

problems/0165-compare-version-numbers/test/SolutionTests.cs

@@ -0,0 +1,56 @@
+// LeetCode 165: Compare Version Numbers 單元測試（xUnit）
+
+using System.Linq;
+using Xunit;
+
+public class SolutionTests {
+    private readonly Solution _s = new Solution();
+
+    [Theory]
+    [InlineData("1.01", "1.001", 0)]
+    [InlineData("1.0", "1.0.0", 0)]
+    [InlineData("1.0.0.0", "1", 0)]
+    [InlineData("0.1", "1.1", -1)]
+    [InlineData("1.0.1", "1", 1)]
+    [InlineData("7.5.2.4", "7.5.3", -1)]
+    public void CompareVersion_ReturnsExpectedResult(string version1, string version2, int expected) {
+        var actual = _s.CompareVersion(version1, version2);
+
+        Assert.Equal(expected, actual);
+    }
+
+    [Theory]
+    [InlineData("1.0.1", "1")]
+    [InlineData("3.0.0", "2.9.9.9")]
+    [InlineData("10.4", "10.3.9")]
+    public void CompareVersion_IsAntiSymmetric(string left, string right) {
+        var forward = _s.CompareVersion(left, right);
+        var backward = _s.CompareVersion(right, left);
+
+        Assert.Equal(1, forward);
+        Assert.Equal(-1, backward);
+    }
+
+    [Theory]
+    [InlineData("", "", 0)]
+    [InlineData("", "0", 0)]
+    [InlineData("0.0.0", "", 0)]
+    [InlineData("000", "0", 0)]
+    [InlineData("2147483647", "2147483646", 1)]
+    [InlineData("2147483646", "2147483647", -1)]
+    public void CompareVersion_HandlesBoundaryInputs(string version1, string version2, int expected) {
+        var actual = _s.CompareVersion(version1, version2);
+
+        Assert.Equal(expected, actual);
+    }
+
+    [Fact]
+    public void CompareVersion_LongSequencesDifferAtEnd() {
+        var left = string.Join('.', Enumerable.Repeat("0", 199).Append("1"));
+        var right = string.Join('.', Enumerable.Repeat("0", 200));
+
+        var result = _s.CompareVersion(left, right);
+
+        Assert.Equal(1, result);
+    }
+}