Override the temp directory path used by afterEach, beforeEach, and createTempDir. Call
this once, before your tests run, if the default ('test-temp/') doesn't suit your project.
Parameters
dirPath: string = null
The directory path to use for temp files instead of the default. Ignored (the
existing default stays in effect) if falsy.
Override the temp directory path used by afterEach, beforeEach, and createTempDir. Call this once, before your tests run, if the default ('test-temp/') doesn't suit your project.