mojo-test-runner

Run Mojo tests using mojo test command. Use when executing tests or verifying test coverage.

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Install this agent skill to your Project

npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/testing/mojo-test-runner-mvillmow-projectodyssey

SKILL.md

Mojo Test Runner Skill

Execute Mojo tests with filtering and reporting.

When to Use

Running Mojo test suites
Verifying implementation correctness
TDD red-green-refactor cycle
Checking test coverage before PR

Quick Reference

bash

# Run all tests
mojo test tests/

# Run specific file
mojo test tests/test_tensor.mojo

# Run with verbose output
mojo test -v tests/

# Run tests matching pattern
./scripts/run_tests.sh tensor

Workflow

Run tests - Execute mojo test or script
Review output - Check pass/fail summary
Fix failures - Address failing tests
Re-run tests - Verify all pass

Mojo-Specific Notes

Test functions must start with test_
Test files must match test_*.mojo or *_test.mojo
Tests run independently - no shared state between tests
Use raises keyword for exception testing

Error Handling

Error	Cause	Solution
`Import error`	Module not found	Verify `-I` include paths
`Syntax error`	Invalid test code	Fix syntax before testing
`Timeout`	Test too slow	Optimize or increase timeout
`Memory error`	Ownership issue	Check ownership and borrowing

References

.claude/shared/mojo-anti-patterns.md - Common test mistakes
/notes/review/ - Testing strategy documentation