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/misc/cexample_module.py

@@ -0,0 +1,14 @@
+# test custom builtin module
+
+try:
+    import cexample
+except ImportError:
+    print("SKIP")
+    raise SystemExit
+
+print(cexample)
+
+d = dir(cexample)
+d.index("add_ints")
+
+print(cexample.add_ints(1, 3))

tests/misc/cexample_module.py.exp

@@ -0,0 +1,2 @@
+<module 'cexample'>
+4