namespace VirtualFS.Tests;

public class PathTests
{
    [Fact]
    public void PathCast()
    {
        Path path = "/test/path";

        Assert.NotNull(path);
        Assert.Equal("/test/path", (string)path);
    }

    [Fact]
    public void FileAndDirectoryPathsDiffer()
    {
        Assert.False(((Path)"/test/path").IsDirectory == ((Path)"/test/path/").IsDirectory);
    }

    [Fact]
    public void AppendCombinesDirectoryAndName()
    {
        Assert.Equal((Path)"/test/path/SomeFile.txt", ((Path)"/test/path/") + "SomeFile.txt");
    }

    [Fact]
    public void ExtensionIsReadFromFilePath()
    {
        Assert.Equal("txt", ((Path)"/test/path/SomeFile.txt").GetExtension());
    }

    [Fact]
    public void ParentIsResolvedCorrectly()
    {
        Assert.Null(new Path().Parent);
        Assert.Equal(new Path(), ((Path)"/test/").Parent);
        Assert.Equal((Path)"/test/", ((Path)"/test/path/").Parent);
    }

    [Fact]
    public void InvalidPathThrows()
    {
        Assert.Throws<InvalidOperationException>(() => new Path("test"));
    }
}