chore(test): add unit test scaffold with testcase harness

[abhijeet-dhumal]

Description

• Replaces the earlier co-located test layout with a tests/unit scaffold
• Adds shared harness, fixtures, and example tests for core and trainer modules
• Establishes patterns for follow-up coverage; for remaining gaps used TODO(test) markers

Checklist

• Tests pass locally (make test-python)
• Linting passes (make verify)
• Documentation updated (if applicable)
• Commit messages follow conventional format

Related Issues

Fixes. : #9

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[Copilot]

Pull request overview

Expands unit-test coverage and supporting infrastructure for core and Trainer MCP components.

Changes:

• Adds validation, security, resilience, policy, auth, and Trainer tests.
• Introduces shared mocks, fixtures, and table-driven test helpers.
• Updates pytest configuration and contributor testing guidance.

Reviewed changes

Copilot reviewed 21 out of 22 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
tests/unit/trainer/test_training.py	Tests training validation and helpers.
tests/unit/trainer/test_platform.py	Tests runtime validation.
tests/unit/trainer/test_planning.py	Adds planning helper tests.
tests/unit/trainer/test_monitoring.py	Tests failure-pattern detection.
tests/unit/trainer/test_lifecycle.py	Tests lifecycle validation.
tests/unit/trainer/test_discovery.py	Tests job discovery behavior.
tests/unit/core/test_tool_integrity.py	Adds metadata integrity checks.
tests/unit/core/test_security.py	Expands security tests.
tests/unit/core/test_resilience.py	Tests resilience primitives.
tests/unit/core/test_policy.py	Tests policy filtering and state.
tests/unit/core/test_config.py	Tests configuration loading.
tests/unit/core/test_auth.py	Tests authentication helpers.
tests/unit/conftest.py	Adds SDK and Kubernetes mocks.
tests/unit/common/test_utils.py	Adds utility tests.
tests/unit/common/test_types.py	Tests response and exception types.
tests/unit/common/test_constants.py	Tests error classification.
tests/unit/common/__init__.py	Defines the common test package.
tests/conftest.py	Adds global test-state fixtures.
tests/common.py	Adds shared test utilities.
pyproject.toml	Registers pytest markers.
kubeflow_mcp/cli_test.py	Stabilizes an auth-provider assertion.
CONTRIBUTING.md	Documents test layout and commands.

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[modichika]

Hey @abhijeet-dhumal I'll help review this PR.
Thanks!

[abhijeet-dhumal]

@andreyvelich @thesuperzapper @szaher @astefanutti @modichika
This PR is a candidate for the first release (0.1.0) tracking #9 / #56.
Can you take a look at what’s still needed so we can unblock the test gate for rc1?

[modichika]

Hey @abhijeet-dhumal I have reviewed every files in tests/ folder that you have changed and it's amazing to see the work.
Here are my observations:

• Infrastructure: conftest.py setup is highly robust, centralizing complex Kubernetes mocking and side-effect management.
• Maintainability: use of custom verification helpers (verify_tool_success/error) and standardized mock data generators makes the test suite highly readable and easy to maintain as the project grows.
• Scalability: established a clean, repeatable pattern for adding new test cases that reduces technical debt in future feature development.
• The pattern listed in the PR like TODO markers are consistent across all files that helps anyone understand how to write new tests.

I have included comments in two files, lmk your thoughts!

[abhijeet-dhumal]

Hey @abhijeet-dhumal I have reviewed every files in tests/ folder that you have changed and it's amazing to see the work. Here are my observations:

• Infrastructure: conftest.py setup is highly robust, centralizing complex Kubernetes mocking and side-effect management.
• Maintainability: use of custom verification helpers (verify_tool_success/error) and standardized mock data generators makes the test suite highly readable and easy to maintain as the project grows.
• Scalability: established a clean, repeatable pattern for adding new test cases that reduces technical debt in future feature development.
• The pattern listed in the PR like TODO markers are consistent across all files that helps anyone understand how to write new tests.

I have included comments in two files, lmk your thoughts!

@modichika Glad you liked the LLD used for scaffold 😊

I don’t see the two file comments you added on the PR yet (might still be in an unsubmitted review draft). Mind pasting them here or re-submitting the review so I can address them? 👀

Also just rebased onto main after #46 landed .. ✅

[modichika]

Hey @abhijeet-dhumal great work with the CONTRIBUTIING.md file it sets clear tests/ structure for new contributors.
Is it ok to add a prerequisite note thatuvneeds to be installed(acc. to thier local env like macos/linux or windows) in the environment for these make commands to work?
Because when I first tried it, it gave an error as you can see in the image.

[abhijeet-dhumal]

Thanks @modichika for reviewing the PR 🙌
Agreed! I will mention in docs accordingly ..

[modichika]

These chained exception tests look important for debugging do you have a rough idea of when you'd like to get those covered? Because cause and context must be known of 404 Not Found API Error.

[abhijeet-dhumal]

Agreed they’re useful for 404 debugging left as TODO(test) so this PR can land the scaffold without growing further.
Aiming at a follow-up under #9 right after this merges (ApiException cause/context on the discovery/monitoring mocks). If you’d rather track it as its own issue, I can open one 👍

[modichika]

Yeah I can take up on that and solve it?

[modichika]

Now it will be showing!