Method defaults_to_argv_when_None

tests/program.py:147–149

(self)

    class binary:
        def defaults_to_argv_when_None(self):
            stdout, _ = run("myapp --help", invoke=False)
            assert "myapp [--core-opts]" in stdout

        def uses_overridden_value_when_given(self):
            stdout, _ = run(