Cache level should be L1 in case of default in memory cache.

[neha-bhargava]

Fixes #4414

Changes proposed in this request
Fix the cache level, when in memory cache is used cache level will be L1Cache.

Testing
Updated tests to verify

Performance impact

Documentation

• All relevant documentation is updated.

[gladjohn]

looks good @neha-bhargava. In the RequestBase there is also a check to see if cache level is set if not we set to None. But, is no test coverage for that scenario I guess. Maybe you can file a work item to track that.

[neha-bhargava]

looks good @neha-bhargava. In the RequestBase there is also a check to see if cache level is set if not we set to None. But, is no test coverage for that scenario I guess. Maybe you can file a work item to track that.

We do have tests to cover all the cache levels here: https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/blob/nebharg/CacheLevelBug/tests/Microsoft.Identity.Test.Unit/PublicApiTests/TelemetryClientTests.cs#L245. So it is all covered. The cache level is unknown when the cache level is not provided by the user implementing custom cache. But when the custom cache is not used the cache level should be L1Cache, I updated the test to make sure that is covered.

[jmprieur]

LGTM
Thanks @neha-bhargava