New tool to serialize mata test cases to file.

[jrothfeder]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @jrothfeder, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the Firebase App Distribution functionality by integrating support for AI-guided testing. It introduces new data structures and client methods to handle AI instructions for tests, refactors core distribution logic into more manageable units, and provides a suite of new prompts and tools for users to define, run, and monitor these advanced automated tests. The changes aim to streamline the process of creating reliable and repeatable test cases for mobile applications.

Highlights

• AI-Guided Testing Integration: Introduced new interfaces (AIInstruction, AIStep) and updated AppDistributionClient.createReleaseTest to support AI-guided test instructions, enabling more sophisticated automated testing scenarios.
• Refactored App Distribution Logic: Extracted release upload and automated test result polling into dedicated upload and awaitTestResults functions within src/appdistribution/distribution.ts, improving modularity and reusability.
• New App Testing Prompts and Tools: Added a new apptesting feature with associated prompts (run_test) and tools (run_tests, testcase_export, check_status) to facilitate the creation, execution, and management of AI-guided tests.
• Improved Utility Functions: Enhanced parseIntoStringArray and parseTestDevices to make the file parameter optional, and extracted toAppName for better code organization.
• Conditional YAML Serialization: Modified toYamlTestCases to conditionally include the id field only when testCase.name is present, preventing potential issues with missing data.

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[gemini-code-assist]

Code Review

This pull request introduces a new tool for serializing MATA test cases and adds functionality for AI-guided testing. The changes include significant refactoring of the app distribution logic, extracting common functionalities like upload and awaitTestResults into a shared distribution.ts module. This improves code structure and reusability. New MCP prompts and tools for app testing are added, gated by an experiment flag. The overall changes are well-structured and the refactoring is a good improvement. I've left a couple of minor suggestions to improve code clarity and fix some typos in a prompt.

[gemini-code-assist]

The else { continue; } block is redundant. The for...of loop will naturally continue to the next iteration if the preceding if condition is not met. Removing this else block will make the code slightly cleaner.

        if (releaseTestNames.size === 0) {
          utils.logSuccess("Automated test(s) passed!");
          return;
        }

[gemini-code-assist]

There are a few typos in this part of the prompt text. There are stray single quotes or incorrect backticks around appId, releaseId, and release_test_name. These should be corrected to ensure the prompt is parsed correctly by the language model.

Suggested change

	You should already know the value of \`appId\' and \`projectId\` from earlier (if you only know \`projectNumber\',
	use the \`firebase_get_project\` tool to get \`projectId\`). \`packageName\` is the package name of the app we tested.
	The \`apptesting_run_test\` tool returns a response with field \`name\` in the form
	projects/{projectNumber}/apps/{appId}/releases/{releaseId}/tests/{releaseTestId}. Extract the values for \'releaseId\'
	and \`releaseTestId\` and use provide a link to the results in the Firebase Console in the format:
	\`https://console.firebase.google.com/u/0/project/{projectId}/apptesting/app/android:{packageName}/releases/{releaseId}/tests/{releaseTestId}\`.
	You can check the status of the test using the \`apptesting_check_status\` tool with \`release_test_name\' set to
	the name of the release test returned by the \`run_test\` tool.
	You should already know the value of \`appId\` and \`projectId\` from earlier (if you only know \`projectNumber\`,
	use the \`firebase_get_project\` tool to get \`projectId\`). \`packageName\` is the package name of the app we tested.
	The \`apptesting_run_test\` tool returns a response with field \`name\` in the form
	projects/{projectNumber}/apps/{appId}/releases/{releaseId}/tests/{releaseTestId}. Extract the values for \`releaseId\`
	and \`releaseTestId\` and use provide a link to the results in the Firebase Console in the format:
	\`https://console.firebase.google.com/u/0/project/{projectId}/apptesting/app/android:{packageName}/releases/{releaseId}/tests/{releaseTestId}\`.
	You can check the status of the test using the \`apptesting_check_status\` tool with \`release_test_name\` set to
	the name of the release test returned by the \`run_test\` tool.

[tagboola]

I don't know if we want to create a new tool for this. In general, the CLI team is trying to reduce the number of tools in the Firebase MCP server, which is why I ended up combining the check_tests and get_devices tools in the previous PR.