Add unit tests for Client Search functionality

[artkolpakov]

Description

This PR introduces unit tests for the client search functionality performed via the clients dashboard.

• Added test_search_functionality in tests/views/test_clients.py:

  • Tests various search queries to ensure correct client filtering.
  • Handles exact matches, substring matches, case insensitivity, empty queries, and nonexistent queries.
  • For each test search query, a GET request is made to the clients API endpoint with the search parameter.
  • The test asserts that the number of returned clients matches the expected number of clients and that each expected client is present in the returned clients list, ensuring that the search functionality works as intended.

• Added test_search_functionality in tests/api/test_clients.py:

  • Verifies the API's response to different search queries.
  • Ensures correct filtering based on client name, email, and ID, including partial matches and empty queries.
  • Validates that the returned clients match the expected results for each query scenario.

Checklist

• Ran the Black Formatter and
  djLint-er on any new code
  (checks
  will
  fail without)
• Made any changes or additions to the documentation where required
• Changes generate no new warnings/errors
• New and existing unit tests pass locally with my
  changes

What type of PR is this?

• ✨ Unit test enhancement

Added/updated tests?

• 👍 yes

Related PRs, Issues etc

N/A

[TreyWW]

Amazing PR, thank you so much! 💜