Asserts whether or not this file is in the tar.

Asserts whether or not these files are in the tar, but not that they are the only files in the tarball.

Asserts the given error indicates a file doesn't exist.

CtxAndAnalyticsForTest returns a context.Context suitable for use in tests (i.e.

CtxForTest returns a context.Context suitable for use in tests (i.e.

Setenv sets an environment variable for the duration of the test and restores the original value afterwards.

Unsetenv unsets an environment variable for the duration of the test and restores the original value afterwards.