using FluentResults;

namespace pgLabII.PgUtils.Tests.ConnectionStrings.Util;

public class UnitTestTokenizerTests
{
    private readonly UnitTestTokenizer _sut = new();

    [Fact]
    public void IsEof_Throws()
    {
        Assert.Throws<Exception>(() =>
        {
            bool _ = _sut.IsEof;
        });
    }

    [Fact]
    public void IsEof_True()
    {
        _sut.AddEof();
        Assert.True(_sut.IsEof);
    }

    [Fact]
    public void Eof_False()
    {
        _sut.AddString("a");
        Assert.False(_sut.IsEof);
    }

    [Fact]
    public void GetKeyword_Success()
    {
        _sut.AddString("a");
        var result = _sut.GetKeyword();
        ResultAssert.Success(result, "a");
    }

    [Fact]
    public void GetKeyword_Unexpected_Throws()
    {
        _sut.AddEquals();
        Assert.Throws<Exception>(() => _sut.GetKeyword());
    }

    [Fact]
    public void GetKeyword_SimulatesException()
    {
        _sut.AddError(new("test"));
        var result = _sut.GetKeyword();
        ResultAssert.Failed(result);
    }

    [Fact]
    public void GetValue_Success()
    {
        _sut.AddString("a");
        var result = _sut.GetValue();
        ResultAssert.Success(result, "a");
    }

    [Fact]
    public void GetValue_Unexpected_Throws()
    {
        _sut.AddEquals();
        Assert.Throws<Exception>(() => _sut.GetValue());
    }

    [Fact]
    public void GetValue_SimulatesException()
    {
        _sut.AddError(new("test"));
        var result = _sut.GetValue();
        ResultAssert.Failed(result);
    }

    [Fact]
    public void ConsumeEquals_Success()
    {
        _sut.AddEquals();
        var result = _sut.ConsumeEquals();
        ResultAssert.Success(result);
    }

    [Fact]
    public void ConsumeEquals_Unexpected_Throws1()
    {
        Assert.Throws<Exception>(() => _sut.ConsumeEquals());
    }

    [Fact]
    public void ConsumeEquals_Unexpected_Throws2()
    {
        _sut.AddString("t");
        Assert.Throws<Exception>(() => _sut.ConsumeEquals());
    }
}