test: Ensure Authorization is not set with empty token

[alexandear]

A test case for #3789.

[gmlewis]

Great, thank you, @alexandear!
LGTM.
Merging.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.17%. Comparing base (b755d64) to head (a3e8195).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@ Coverage Diff @@## master #3790 +/- ##
=======================================
Coverage 92.17% 92.17% =======================================
Files 191 191 Lines 13690 13690 =======================================
Hits 12619 12619 Misses 883 883 Partials 188 188 

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[jsoref]

This makes sense. Sorry as a drive-by person without Google credits to burn, trying to design this was outside scope. I really appreciate that my baseline PR was merged and you wrote a follow up to add tests. (I'm currently smarting because some other company closed a PR of mine to fix a clear regression of theirs because they decided the problem scope was too complicated to let externals work on.)