Terry J. Reedy added the comment:
A different take on the proposal: A functional integration test for IDLE should
open IDLE, rename .idlerc, open a new file, insert some text, and, for
instance, at some point open the options dialog for testing. As part this, the
font face change would simulate button clicks and then check that the the font
had changed in the editor *and* in .idlerc/config-main.cfg. I have done this
manually. A complete functional test would do what I also occasionally do.
Exercise at least once every menu function, all dialog widgets, and a few
invisible functions. Unless suppressed, even the print function should be
included, verified by the user affirming that the printed page appeared.
Such a test should be separate from the unittest test suite, just as is the
htest module. Only a few buildbots run gui tests anyway, but some core devs
run the suite regularly, some with gui enabled. I don't want to impose on them
in any way, neither another minute or two of test time, nor flickers and bells.
Running such a test suite should be strictly voluntary.
A few files could go in idle_test, like htest.py. A large number might justify
a separate func_test directory.
I don't want the mode of invocation and operation and the code style to be
limited to that of unittest.
I envision IDLE and the functest code running in one process, with one Tk
instance. Which starts first is to be decided. But if IDLE starts first, then
Run Func Test can be a menu item. I have already though of adding Run Unit
Tests (in a subprocess) and Run Visual Tests (in the same process) to the Help
Menu.
The main use of setup and teardown in IDLE unit tests is to create and destroy
Tk roots; with one permanent root, these functionsgo away.
If test_xyz functions are defined at module scope, they are easy to collect and
run. This is the function I use in my own project.
def main(namespace):
for name, obj in namespace.items():
if name.startswith('test_') and hasattr(obj, '__call__'):
print(name)
obj()
The obj() call could be wrapped with
try: obj()
except Exception as e: print(e, file=output_window)
where output_window is an instance of IDLE's OutputWindow. A helper equal(x,y)
function could send an error message to the same place.
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