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Questions about outwin.py:
1. Should a main() be added for htest and unittest?
2. In _file_line_helper, to test if the file exists, the file is opened, then closed. Would os.path.isfile work here?
Questions about tests:
1. OutputWindow is an EditorWindow and EditorWindow has a superclass of Object. I didn't know how to make tests to test the text binding for goto-file-line. Or how to test the other functions. I tried emulating the dialogs, but couldn't get it to work. Is there any existing test for another module I can study and copy? EditorWindow didn't really have any tests for this yet, but if I learn how to do it here, I can apply it there.
2. The `goto_line_file` function compiles the class attribute for the matching patterns `file_line_pats` which is then used by `_file_line_helper`. I had trouble writing a test just for the helper without copying this pattern compile code from the other function. I wasn't sure how to get around that. Are the patterns at the class level so that they are cahced for all the calls? How should I change the test? Can the patterns be compiled inside `_file_line_helper`?
3. Is the test of `_file_line_helper` the right way to go with the tests? Should examples of each pattern be included? I didn't add a test for the TypeError because the pattens didn't seem like they would match on anything but digits. Should I add a pattern for testing just for code coverage?
Thanks!