Add Test Suite

[kopelli]

Added a test suite for verifying examples. Running the tests individually works fine, but they fail for the whole suite due to the usage of the static AaCReaderContext/AacWriterContext. It's not an issue under normal usages from the commandline, but due to the threaded tests sharing state it comes up.

I have some ideas for resolving that, but it likely would have a non-trivial ripple through the codebase that are out of scope for getting some tests available.

As of right now, I covered the 'draw-diagrams' and 'execute-aac-strategy' runs.

[SlavaVedernikov]

We probably need to add checks like this for all options:

if (string.IsNullOrEmpty(businessQuery))
    return;

Without this the CLI misinterprets the option values e.g. in ToDoAppExample there are no business processes, but if we add --business-processes with no values, then it would look as follows --business-processes --levels-of-details container. CLI treats --levels-of-details container as values for --business-processes option.

[SlavaVedernikov]

We should probably use cmd.exe here to ensure that every test runs in its own process. This would allow us to run all tests concurrently e.g.

public async Task<int> BuildAndInvoke()
    {
        if (_paramsArg.Count > 0)
        {
            _cliArgs.Add("--params");
            _cliArgs.AddRange(_paramsArg.Select(kvp => $"{kvp.Key}={kvp.Value}"));
        }

        var args = string.Join(" ", _cliArgs.Select(x => x.Contains(" ") ? $"\"{x}\"" : x));
        _logger($"Executing CLI with arguments: {args}");
        var cliPath = Path.GetFullPath(@$"..\..\..\..\C4InterFlow.Cli\bin\Debug\net6.0\win-x64");
        // Configure the process start info
        var startInfo = new ProcessStartInfo
        {
            FileName = "cmd.exe",
            Arguments = $"/C {Path.Combine(cliPath, "C4InterFlow.Cli.exe")} {args}",
            RedirectStandardOutput = true,
            RedirectStandardError = true,
            UseShellExecute = false,
            CreateNoWindow = true
        };

        // Start the process and capture output/error
        using var process = new Process { StartInfo = startInfo };
        process.Start();

        // Read standard output and error asynchronously
        string? output = await process.StandardOutput.ReadToEndAsync();
        string? error = await process.StandardError.ReadToEndAsync();

        process.WaitForExit();

        if (!string.IsNullOrEmpty(output))
        {
            _logger($"Output: {output}");
        }

        if (!string.IsNullOrEmpty(error))
        {
            _logger($"Error: {error}");
        }

        return process.ExitCode;
    }

We may want to add "........\C4InterFlow.Cli\bin\Debug\net6.0\win-x64" as a config value for C4Interflow.Specs project, or find a better way to point to C4InterFlow.Cli.exe