Add comprehensive test coverage for cli.pipeline_step module

[Copilot]

This PR adds comprehensive test coverage for the clarifai.cli.pipeline_step module by creating a dedicated test file tests/cli/test_pipeline_step.py, following the same structure and patterns as the existing tests/cli/test_pipeline.py.

Changes Made

New Test File: tests/cli/test_pipeline_step.py

Created comprehensive test coverage with 22 test methods across 6 test classes (472 lines of test code):

• TestPipelineStepInitCommand - Tests for clarifai pipeline-step init command

  • Directory structure creation and validation
  • Custom path handling and file skipping logic
  • Content validation for generated config.yaml and pipeline_step.py files

• TestPipelineStepUploadCommand - Tests for clarifai pipeline-step upload command

  • Default and custom path handling
  • --skip_dockerfile flag functionality
  • Error handling for invalid paths

• TestPipelineStepListCommand - Tests for clarifai pipeline-step list command

  • Listing across all apps vs. within specific apps
  • Parameter validation for app_id/pipeline_id combinations
  • Default parameter behavior

• TestPipelineStepCommandIntegration - Integration tests between commands

• TestPipelineStepCLIEdgeCases - Edge cases and error condition handling

• TestPipelineStepCommandHelp - Help command output validation

Code Organization Cleanup

Removed the duplicate TestPipelineStepListCommand class from tests/cli/test_pipeline.py to eliminate redundancy and maintain clean separation of concerns.

Testing Approach

The new tests follow the exact same patterns established in the existing pipeline tests:

• Use of click.testing.CliRunner for CLI command testing
• Proper mocking with unittest.mock.patch decorators
• Isolated filesystem testing for file operations using runner.isolated_filesystem()
• Context object mocking for authentication scenarios
• Comprehensive error case testing with exit code validation

Code Quality

• ✅ Passes ruff check linting (auto-fixed 3 minor style issues)
• ✅ Passes ruff format formatting validation
• ✅ All tests follow existing architectural patterns
• ✅ Comprehensive coverage of all CLI commands and edge cases

This ensures the clarifai.cli.pipeline_step module has the same level of test coverage and quality as the existing clarifai.cli.pipeline module.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add tests coverage for cli.pipeline_step module similar to cli.pipeline</issue_title>
<issue_description>Add tests/cli/test_pipeline_step.py that adds tests for clarifai.cli.pipeline_step module similar to tests/cli/test_pipeline.py</issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes #794

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