// 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);
    }
}