[ADMINAPI-1448] Increase unit tests coverage in all unit tests V2/V3

[josephcampos-gap]

This pull request adds new and comprehensive unit tests for several core features in the Admin API, focusing on applications, authorization strategies, API client validation, and multi-tenancy middleware. The new tests improve coverage for validators, command handlers, and mapping logic, ensuring more robust validation and correct behavior across these components.

Unit tests for application features:

• Added tests for the AddApplication and EditApplication validators to check for required fields, maximum lengths, and valid IDs. This includes new test classes AddApplicationValidatorTests and EditApplicationValidatorTests. [1] [2]
• Introduced tests for the DeleteApplication handler to verify the delete command is executed and exceptions are handled.
• Added a test for the ResetApplicationCredentials handler to ensure it throws a validation exception when the endpoint is disabled.

Unit tests for authorization strategies:

• Added tests for AuthorizationStrategyMapper to verify correct mapping from data models to API models and preservation of list order.
• Added tests for ReadAuthorizationStrategy to ensure the query returns correctly mapped strategies and proper HTTP results.

Improvements to API client validation:

• Added tests to AddApiClientValidatorTests and EditApiClientValidatorTests to ensure validation errors are raised when OdsInstanceIds is null, in addition to when it is empty. [1] [2]

Unit tests for multi-tenancy middleware:

• Introduced comprehensive tests for TenantResolverMiddleware, covering scenarios such as valid and invalid tenant headers, missing headers, Swagger requests, and V1 mode bypasses.

[github-actions]

Test Results

   15 files     15 suites   1m 8s ⏱️
1 753 tests 1 739 ✅ 14 💤 0 ❌
4 125 runs  4 087 ✅ 38 💤 0 ❌

Results for commit b0c676f.

♻️ This comment has been updated with latest results.