tests/misc: Add test for cexample module.

This also moves the existing test for cexample.add_ints
originally done in extra_coverage.

Signed-off-by: Laurens Valk <laurens@pybricks.com>

tests/unix/extra_coverage.py

@@ -49,11 +49,6 @@ print(buf.write(bytearray(16)))
 # function defined in C++ code
 print("cpp", extra_cpp_coverage())
 
-# test user C module
-import cexample
-
-print(cexample.add_ints(3, 2))
-
 # test user C module mixed with C++ code
 import cppexample
 

tests/unix/extra_coverage.py.exp

@@ -179,7 +179,6 @@ OSError
 None
 None
 cpp None
-5
 (3, 'hellocpp')
 frzstr1
 frzstr1.py