Ensure that createNeverThrowError returns an Error that is an instance of Error class.
#637
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Internally at Google, we have some company-wide conformance tests that ensure that all errors that are thrown, are subclasses of
Error.To ensure this, I adjusted the
createNeverThrowErrorfunc to return a newNeverThrowErrorclass, which both extendsErrorand overwrites the object's prototype to ensure that it isError.This allows for:
createNeverThrowErrorfeels like an internal detail of the library and is only used in some fringe boundary cases. I added a quick test in a spot that felt the most obvious. Suggestions on alternatives are welcome!