Add cache condtion and gh test jobs

[say8425]

Story

• Testing a released gh action is too difficult.
• Jobs are too big.
• Installing dependencies are always running.

Solves

• Use Github Action Test Automation.
  • Test current branch by using current action.yml.
  • uses: ./
• Separate a job to multiple jobs.
• Use cache-hit option.
  • Use yarn --prefer-offline.

In Addition

The workflow is not valid. .github/workflows/test.yml (Line: 89, Col: 15): Unrecognized named-value: 'github'. Located at position 1 within expression: github.action_path
https://github.com/say8425/aws-secrets-manager-actions/actions/runs/446727841

• uses: ${{ github.action_path }} looks best, but uses looks not allow contexts.

References

• SO: How to cache yarn packages in GitHub Actions
• GH Actions Docs: jobs.<job_id>.steps[*].uses
• Github Action Test Automation