SpdUp/SpdUp.Tests/LoggerTests.cs

using SpdUp.Core;

namespace SpdUp.Tests;

/// <summary>
/// Tests for the Logger class.
/// </summary>
public class LoggerTests
{
    [Fact]
    public void Info_FiresLogWrittenEvent()
    {
        string? received = null;
        Logger.LogWritten += handler;

        try
        {
            Logger.Info("test info message");
            Assert.NotNull(received);
            Assert.Contains("[INFO]", received);
            Assert.Contains("test info message", received);
        }
        finally
        {
            Logger.LogWritten -= handler;
        }

        void handler(string line) => received = line;
    }

    [Fact]
    public void Warn_FiresLogWrittenEventWithWarnLevel()
    {
        string? received = null;
        Logger.LogWritten += handler;

        try
        {
            Logger.Warn("test warning");
            Assert.NotNull(received);
            Assert.Contains("[WARN]", received);
            Assert.Contains("test warning", received);
        }
        finally
        {
            Logger.LogWritten -= handler;
        }

        void handler(string line) => received = line;
    }

    [Fact]
    public void Error_IncludesExceptionDetails()
    {
        string? received = null;
        Logger.LogWritten += handler;

        try
        {
            Logger.Error("something failed", new InvalidOperationException("bad state"));
            Assert.NotNull(received);
            Assert.Contains("[ERROR]", received);
            Assert.Contains("something failed", received);
            Assert.Contains("InvalidOperationException", received);
            Assert.Contains("bad state", received);
        }
        finally
        {
            Logger.LogWritten -= handler;
        }

        void handler(string line) => received = line;
    }

    [Fact]
    public void Error_WithoutException_DoesNotContainPipe()
    {
        string? received = null;
        Logger.LogWritten += handler;

        try
        {
            Logger.Error("simple error");
            Assert.NotNull(received);
            Assert.Contains("[ERROR]", received);
            Assert.Contains("simple error", received);
            Assert.DoesNotContain("|", received);
        }
        finally
        {
            Logger.LogWritten -= handler;
        }

        void handler(string line) => received = line;
    }

    [Fact]
    public void LogWritten_IncludesTimestamp()
    {
        string? received = null;
        Logger.LogWritten += handler;

        try
        {
            Logger.Info("timestamp check");
            Assert.NotNull(received);
            // Format: [yyyy-MM-dd HH:mm:ss.fff]
            Assert.Matches(@"\[\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d{3}\]", received);
        }
        finally
        {
            Logger.LogWritten -= handler;
        }

        void handler(string line) => received = line;
    }
}