Test for autoapi extension.

[mcmtroffaes]

See issue #327.

[codecov]

Codecov Report

Merging #334 (1bdd7af) into develop (337285f) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop     #334   +/-   ##
========================================
  Coverage    99.96%   99.96%           
========================================
  Files           55       56    +1     
  Lines         2616     2644   +28     
  Branches       399      402    +3     
========================================
+ Hits          2615     2643   +28     
  Misses           1        1           

Files Changed	Coverage Δ
src/sphinxcontrib/bibtex/__init__.py	100.00% <ø> (ø)
test/some_module/footcite.py	100.00% <ø> (ø)
test/some_module/cite.py	100.00% <100.00%> (ø)
test/test_autoapi.py	100.00% <100.00%> (ø)
test/test_autodoc.py	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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