fix: Add mock_testing to Presidio unit tests and fix enterprise base_email imports

[Chesars]

Title

fix: Add mock_testing to Presidio unit tests and fix enterprise base_email imports

Pre-Submission checklist

Please complete all items before asking a LiteLLM maintainer to review your PR

• I have Added testing in the tests/litellm/ directory, Adding at least 1 test is a hard requirement - see details
• I have added a screenshot of my new test passing locally
• My PR passes all unit tests on make test-unit
• My PR's scope is as isolated as possible, it only solves 1 specific problem

Type

✅ Test

Changes

Summary

Fixes 2 failing unit tests that were missed in recent test cleanup:

• 2 Presidio guardrail tests
• 18 enterprise base_email tests

Changes

1. Presidio Tests (Unit Tests)

Added mock_testing=True to 2 test functions that were creating _OPTIONAL_PresidioPIIMasking directly instead of using the presidio_guardrail fixture.

Files changed:

• tests/test_litellm/proxy/guardrails/guardrail_hooks/test_presidio.py

Tests fixed:

• test_presidio_sets_guardrail_information_in_request_data ✅
• test_request_data_flows_to_apply_guardrail ✅

Why this fix: Without mock_testing=True, the Presidio class tries to validate PRESIDIO_ANALYZER_API_BASE environment variable which isn't needed for unit tests.

2. Enterprise Email Tests

Changed absolute imports to relative imports in base_email.py to use local code instead of package.

Files changed:

• enterprise/litellm_enterprise/enterprise_callbacks/send_emails/base_email.py
• tests/test_litellm/enterprise/enterprise_callbacks/send_emails/test_base_email.py

Tests fixed:

• All 18 tests in test_base_email.py ✅

The litellm-enterprise==0.1.20 package in site-packages is outdated and missing SendKeyRotatedEmailEvent. Using relative imports ensures main code is used.

Testing

# Presidio tests
poetry run pytest tests/test_litellm/proxy/guardrails/guardrail_hooks/test_presidio.py::test_presidio_sets_guardrail_information_in_request_data -v
poetry run pytest tests/test_litellm/proxy/guardrails/guardrail_hooks/test_presidio.py::test_request_data_flows_to_apply_guardrail -v
# 2 passed

Enterprise email tests

poetry run pytest tests/test_litellm/enterprise/enterprise_callbacks/send_emails/test_base_email.py -v
# 18 passed

Note for Maintainers

⚠️ The litellm-enterprise package (v0.1.20) in pyproject.toml is outdated. Consider updating it to include recent additions like SendKeyRotatedEmailEvent.

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