RepositoryPaths.Tests.cs

using Xunit;

namespace IntelliTect.Multitool.Tests;

public class RepositoryPathsTests
{
    [Fact]
    public void GetDefaultRepoRoot_ReturnsRepoRootDirectory()
    {
        // Makes the assumption that the repository directory for this solution is named the same as the solution
        Assert.EndsWith(nameof(Multitool), RepositoryPaths.GetDefaultRepoRoot());
    }

    [Fact]
    public void BuildVariables_BeingSetProperly()
    {
        Assert.Equal(3, RepositoryPaths.BuildVariables.Count);

        Assert.True(RepositoryPaths.BuildVariables.TryGetValue("BuildingForLiveUnitTesting", out _));

        Assert.True(RepositoryPaths.BuildVariables.TryGetValue("ProjectPath", out string? projectPath));
        Assert.NotNull(projectPath);
        Assert.NotEmpty(projectPath);

        Assert.True(RepositoryPaths.BuildVariables.TryGetValue("SolutionDir", out string? solutionDir));
        Assert.NotNull(solutionDir);
        Assert.NotEmpty(solutionDir);
    }

    [Fact]
    public void TrySearchForGitContainingDirectory_ReturnsTrueWhenFound()
    {
        Assert.True(RepositoryPaths.TrySearchForGitContainingDirectory(new DirectoryInfo(Directory.GetCurrentDirectory()), out string gitParentDirectory));
        // Makes the assumption that the repository directory for this solution is named the same as the solution
        Assert.EndsWith(nameof(Multitool), gitParentDirectory);
    }

    [Fact]
    public void TrySearchForGitContainingDirectory_ReturnsFalseWhenNotFound()
    {
        string? path = Path.GetPathRoot(Directory.GetCurrentDirectory());
        Assert.NotNull(path);
        Assert.False(RepositoryPaths.TrySearchForGitContainingDirectory(new DirectoryInfo(path), out string gitParentDirectory));
        Assert.Empty(gitParentDirectory);
    }

    [Fact]
    public void TrySearchForGitContainingDirectory_ReturnsTrueWhenGitIsAFile()
    {
        // In a git worktree, .git is a file (gitfile pointer), not a directory.
        // This test simulates that scenario.
        string tempRoot = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
        string subDir = Path.Combine(tempRoot, "subdir");
        try
        {
            Directory.CreateDirectory(subDir);
            File.WriteAllText(Path.Combine(tempRoot, ".git"), "gitdir: ../.git/worktrees/my-branch");

            Assert.True(RepositoryPaths.TrySearchForGitContainingDirectory(new DirectoryInfo(subDir), out string gitParentDirectory));
            Assert.Equal(tempRoot, gitParentDirectory);
        }
        finally
        {
            Directory.Delete(tempRoot, recursive: true);
        }
    }
}