Summary of changes

• Add tests for RcmSubscriptionManager and RemoteConfigurationPath
• Replace regex with string comparison in RemoteConfigurationPath

Reason for change

• We were missing unit tests for remote config stuff, and I want to improve it without breaking things
• The RemoteConfigurationPath is running a Regex on every file listed in the remote config response (which happens every 5s), but it's a simple pattern that can be easily directly implemented

Implementation details

• Used 🤖 to generate bunch of tests, and verified they are really how we want things to work
  • High level tests for RcmSubscriptionManager
  • Tests for RemoteConfigurationPath covering changes in this PR
• More 🤖 in the conversion, but it's relatively simple, once you decode the allowed patterns from the Regex 😄

Test coverage

Unit tests in this PR cover compatibility with the existing implementation.

Simple benchmarking for the regex improvements:

[MemoryDiagnoser, GroupBenchmarksBy(BenchmarkLogicalGroupRule.ByCategory), CategoriesColumn]
public class RemoteConfigBenchmark
{
    private string _pathToTest;
    private string _result;

    [GlobalSetup]
    public void GlobalSetup()
    {
        _pathToTest = "datadog/2/ASM_FEATURES/ASM_FEATURES-third/testname";
    }

    [Benchmark]
    public string RemoteConfigurationPathFromPath_Original()
    {
        var result = OriginalRemoteConfigurationPath.FromPath(_pathToTest);
        _result = result.Id;
        return result.Path;
    }

    [Benchmark]
    public string RemoteConfigurationPathFromPath_Updated()
    {
        var result = RemoteConfigurationPath.FromPath(_pathToTest);
        _result = result.Id;
        return result.Path;
    }
}

Other details

https://datadoghq.atlassian.net/browse/LANGPLAT-940

All part of the Remote Config perf stack