XLSX output of Accessibility Checker API is not flushed to disk

[jamalmazrui]

Using the Node.js accessibility-checker package, I am writing a program that saves test results in multiple formats, including .xlsx. My program tries to rename the output from results.xlsx to something more meaningful, such as the title of the web page that was tested (sanitized for the file system). Even though the checker object is closed before the rename attempt, however, this fails. After the program exits, results.xlsx is present, so I know it is being created. How can I ensure that all output files produced by the checker.getCompliance method are flushed to disk? is Describe the bug
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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

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Definition of Done

• Design artifacts reviewed
• Work item implemented
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• Unit test completed
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• Manual and Screen Reader Testing (when applicable)
• Video recording of user experience walkthrough (if impact to UX)
• PR created

[tombrunet]

results.xlsx is not created until the tests are complete since it contains summaries of the results of all tests.

You should be able to generate the summary files by calling the close function to indicate that you're done, but, looking at the code, it looks like that was removed. I'll have to do some digging to determine when and why that happened.

[tombrunet]

I think this may be a dupe of #2120

[jamalmazrui]

My code is calling a close() method of the checker object, but it does not assure that all output files, including results.xlsx, are fully written to disk (I am calling it synchronously).