239 lines
8.5 KiB
Plaintext
239 lines
8.5 KiB
Plaintext
README FOR IDLE TESTS IN IDLELIB.IDLE_TEST
|
|
|
|
0. Quick Start
|
|
|
|
Automated unit tests were added in 3.3 for Python 3.x.
|
|
To run the tests from a command line:
|
|
|
|
python -m test.test_idle
|
|
|
|
Human-mediated tests were added later in 3.4.
|
|
|
|
python -m idlelib.idle_test.htest
|
|
|
|
|
|
1. Test Files
|
|
|
|
The idle directory, idlelib, has over 60 xyz.py files. The idle_test
|
|
subdirectory contains test_xyz.py for each implementation file xyz.py.
|
|
To add a test for abc.py, open idle_test/template.py and immediately
|
|
Save As test_abc.py. Insert 'abc' on the first line, and replace
|
|
'zzdummy' with 'abc.
|
|
|
|
Remove the imports of requires and tkinter if not needed. Otherwise,
|
|
add to the tkinter imports as needed.
|
|
|
|
Add a prefix to 'Test' for the initial test class. The template class
|
|
contains code needed or possibly needed for gui tests. See the next
|
|
section if doing gui tests. If not, and not needed for further classes,
|
|
this code can be removed.
|
|
|
|
Add the following at the end of abc.py. If an htest was added first,
|
|
insert the import and main lines before the htest lines.
|
|
|
|
if __name__ == "__main__":
|
|
from unittest import main
|
|
main('idlelib.idle_test.test_abc', verbosity=2, exit=False)
|
|
|
|
The ', exit=False' is only needed if an htest follows.
|
|
|
|
|
|
|
|
2. GUI Tests
|
|
|
|
When run as part of the Python test suite, Idle GUI tests need to run
|
|
test.support.requires('gui'). A test is a GUI test if it creates a
|
|
tkinter.Tk root or master object either directly or indirectly by
|
|
instantiating a tkinter or idle class. GUI tests cannot run in test
|
|
processes that either have no graphical environment available or are not
|
|
allowed to use it.
|
|
|
|
To guard a module consisting entirely of GUI tests, start with
|
|
|
|
from test.support import requires
|
|
requires('gui')
|
|
|
|
To guard a test class, put "requires('gui')" in its setUpClass function.
|
|
The template.py file does this.
|
|
|
|
To avoid interfering with other GUI tests, all GUI objects must be
|
|
destroyed and deleted by the end of the test. The Tk root created in a
|
|
setUpX function should be destroyed in the corresponding tearDownX and
|
|
the module or class attribute deleted. Others widgets should descend
|
|
from the single root and the attributes deleted BEFORE root is
|
|
destroyed. See https://bugs.python.org/issue20567.
|
|
|
|
@classmethod
|
|
def setUpClass(cls):
|
|
requires('gui')
|
|
cls.root = tk.Tk()
|
|
cls.text = tk.Text(root)
|
|
|
|
@classmethod
|
|
def tearDownClass(cls):
|
|
del cls.text
|
|
cls.root.update_idletasks()
|
|
cls.root.destroy()
|
|
del cls.root
|
|
|
|
The update_idletasks call is sometimes needed to prevent the following
|
|
warning either when running a test alone or as part of the test suite
|
|
(#27196). It should not hurt if not needed.
|
|
|
|
can't invoke "event" command: application has been destroyed
|
|
...
|
|
"ttk::ThemeChanged"
|
|
|
|
If a test creates instance 'e' of EditorWindow, call 'e._close()' before
|
|
or as the first part of teardown. The effect of omitting this depends
|
|
on the later shutdown. Then enable the after_cancel loop in the
|
|
template. This prevents messages like the following.
|
|
|
|
bgerror failed to handle background error.
|
|
Original error: invalid command name "106096696timer_event"
|
|
Error in bgerror: can't invoke "tk" command: application has been destroyed
|
|
|
|
Requires('gui') causes the test(s) it guards to be skipped if any of
|
|
these conditions are met:
|
|
|
|
- The tests are being run by regrtest.py, and it was started without
|
|
enabling the "gui" resource with the "-u" command line option.
|
|
|
|
- The tests are being run on Windows by a service that is not allowed
|
|
to interact with the graphical environment.
|
|
|
|
- The tests are being run on Linux and X Windows is not available.
|
|
|
|
- The tests are being run on Mac OSX in a process that cannot make a
|
|
window manager connection.
|
|
|
|
- tkinter.Tk cannot be successfully instantiated for some reason.
|
|
|
|
- test.support.use_resources has been set by something other than
|
|
regrtest.py and does not contain "gui".
|
|
|
|
Tests of non-GUI operations should avoid creating tk widgets. Incidental
|
|
uses of tk variables and messageboxes can be replaced by the mock
|
|
classes in idle_test/mock_tk.py. The mock text handles some uses of the
|
|
tk Text widget.
|
|
|
|
|
|
3. Running Unit Tests
|
|
|
|
Assume that xyz.py and test_xyz.py both end with a unittest.main() call.
|
|
Running either from an Idle editor runs all tests in the test_xyz file
|
|
with the version of Python running Idle. Test output appears in the
|
|
Shell window. The 'verbosity=2' option lists all test methods in the
|
|
file, which is appropriate when developing tests. The 'exit=False'
|
|
option is needed in xyx.py files when an htest follows.
|
|
|
|
The following command lines also run all test methods, including
|
|
GUI tests, in test_xyz.py. (Both '-m idlelib' and '-m idlelib.idle'
|
|
start Idle and so cannot run tests.)
|
|
|
|
python -m idlelib.xyz
|
|
python -m idlelib.idle_test.test_xyz
|
|
|
|
The following runs all idle_test/test_*.py tests interactively.
|
|
|
|
>>> import unittest
|
|
>>> unittest.main('idlelib.idle_test', verbosity=2)
|
|
|
|
The following run all Idle tests at a command line. Option '-v' is the
|
|
same as 'verbosity=2'.
|
|
|
|
python -m unittest -v idlelib.idle_test
|
|
python -m test -v -ugui test_idle
|
|
python -m test.test_idle
|
|
|
|
The idle tests are 'discovered' by
|
|
idlelib.idle_test.__init__.load_tests, which is also imported into
|
|
test.test_idle. Normally, neither file should be changed when working on
|
|
individual test modules. The third command runs unittest indirectly
|
|
through regrtest. The same happens when the entire test suite is run
|
|
with 'python -m test'. So that command must work for buildbots to stay
|
|
green. Idle tests must not disturb the environment in a way that makes
|
|
other tests fail (issue 18081).
|
|
|
|
To run an individual Testcase or test method, extend the dotted name
|
|
given to unittest on the command line or use the test -m option. The
|
|
latter allows use of other regrtest options. When using the latter,
|
|
all components of the pattern must be present, but any can be replaced
|
|
by '*'.
|
|
|
|
python -m unittest -v idlelib.idle_test.test_xyz.Test_case.test_meth
|
|
python -m test -m idlelib.idle_test.text_xyz.Test_case.test_meth test_idle
|
|
|
|
The test suite can be run in an IDLE user process from Shell.
|
|
>>> import test.autotest # Issue 25588, 2017/10/13, 3.6.4, 3.7.0a2.
|
|
There are currently failures not usually present, and this does not
|
|
work when run from the editor.
|
|
|
|
|
|
4. Human-mediated Tests
|
|
|
|
Human-mediated tests are widget tests that cannot be automated but need
|
|
human verification. They are contained in idlelib/idle_test/htest.py,
|
|
which has instructions. (Some modules need an auxiliary function,
|
|
identified with "# htest # on the header line.) The set is about
|
|
complete, though some tests need improvement. To run all htests, run the
|
|
htest file from an editor or from the command line with:
|
|
|
|
python -m idlelib.idle_test.htest
|
|
|
|
|
|
5. Test Coverage
|
|
|
|
Install the coverage package into your Python 3.6 site-packages
|
|
directory. (Its exact location depends on the OS).
|
|
> python3 -m pip install coverage
|
|
(On Windows, replace 'python3 with 'py -3.6' or perhaps just 'python'.)
|
|
|
|
The problem with running coverage with repository python is that
|
|
coverage uses absolute imports for its submodules, hence it needs to be
|
|
in a directory in sys.path. One solution: copy the package to the
|
|
directory containing the cpython repository. Call it 'dev'. Then run
|
|
coverage either directly or from a script in that directory so that
|
|
'dev' is prepended to sys.path.
|
|
|
|
Either edit or add dev/.coveragerc so it looks something like this.
|
|
---
|
|
# .coveragerc sets coverage options.
|
|
[run]
|
|
branch = True
|
|
|
|
[report]
|
|
# Regexes for lines to exclude from consideration
|
|
exclude_lines =
|
|
# Don't complain if non-runnable code isn't run:
|
|
if 0:
|
|
if __name__ == .__main__.:
|
|
|
|
.*# htest #
|
|
if not _utest:
|
|
if _htest:
|
|
---
|
|
The additions for IDLE are 'branch = True', to test coverage both ways,
|
|
and the last three exclude lines, to exclude things peculiar to IDLE
|
|
that are not executed during tests.
|
|
|
|
A script like the following cover.bat (for Windows) is very handy.
|
|
---
|
|
@echo off
|
|
rem Usage: cover filename [test_ suffix] # proper case required by coverage
|
|
rem filename without .py, 2nd parameter if test is not test_filename
|
|
setlocal
|
|
set py=f:\dev\3x\pcbuild\win32\python_d.exe
|
|
set src=idlelib.%1
|
|
if "%2" EQU "" set tst=f:/dev/3x/Lib/idlelib/idle_test/test_%1.py
|
|
if "%2" NEQ "" set tst=f:/dev/ex/Lib/idlelib/idle_test/test_%2.py
|
|
|
|
%py% -m coverage run --pylib --source=%src% %tst%
|
|
%py% -m coverage report --show-missing
|
|
%py% -m coverage html
|
|
start htmlcov\3x_Lib_idlelib_%1_py.html
|
|
rem Above opens new report; htmlcov\index.html displays report index
|
|
---
|
|
The second parameter was added for tests of module x not named test_x.
|
|
(There were several before modules were renamed, now only one is left.)
|