Measure test coverage

[jarrodmillman]

When using --doctest-modules , we get

=================================== FAILURES ===================================
____________________ test_attach_same_module_and_attr_name _____________________

    def test_attach_same_module_and_attr_name():
        from lazy_loader.tests import fake_pkg
    
        # Grab attribute twice, to ensure that importing it does not
        # override function by module
>       assert isinstance(fake_pkg.some_func, types.FunctionType)
E       AssertionError: assert False
E        +  where False = isinstance(<module 'lazy_loader.tests.fake_pkg.some_func' from '/home/runner/work/lazy_loader/lazy_loader/lazy_loader/tests/fake_pkg/some_func.py'>, <class 'function'>)
E        +    where <module 'lazy_loader.tests.fake_pkg.some_func' from '/home/runner/work/lazy_loader/lazy_loader/lazy_loader/tests/fake_pkg/some_func.py'> = <module 'lazy_loader.tests.fake_pkg' from '/home/runner/work/lazy_loader/lazy_loader/lazy_loader/tests/fake_pkg/__init__.py'>.some_func
E        +    and   <class 'function'> = types.FunctionType

lazy_loader/tests/test_lazy_loader.py:104: AssertionError

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (main@b08a4b9). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #23   +/-   ##
=======================================
  Coverage        ?   83.33%           
=======================================
  Files           ?        4           
  Lines           ?      174           
  Branches        ?        0           
=======================================
  Hits            ?      145           
  Misses          ?       29           
  Partials        ?        0           

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