https://github.com/nodejs/node/blob/master/doc/guides/writing-tests.md
- It does not mention how to determine which folder a new test should go to:
parallel, sequential, or any other folders under test
2. It does not mention how the test should be named (if it's a new test script) It does
- It does not mention how to find existing test cases and how to decide if a new test case belongs to a new file or an existing file.