public void FormatClientException_Always_ReturnsCorretStringRepresentation() { var formatter = new LogFormatter(); var exception = new ClientExceptionContract() { ClientPlatform = "Chrome", CorrelationId = "qc-123", ErrorCode = "UNEXPECTED", Message = "Test error", StackTrace = "TestModule.MyFunc" }; string formattedMessage = formatter.FormatClientException(exception); Assert.Equal("qc-123: CLIENT UNEXPECTED - Test error at TestModule.MyFunc (Chrome)", formattedMessage); }