Run pytest via IDLE gui

Question

I have installed python 3.4.2 and then ran pip install -U pytest to install pytest.

I have the following example script:

# content of test_sample.py
import pytest

def func(x):
    return x + 1

def test_answer():
    assert func(3) == 4

When I press F5 in IDLE it doesn't seem to run anything. How do I get to test my script via IDLE?

UPDATE
I tried to add pytest.main() , but I received an error.

File "C:\Python34\lib\site-packages\_pytest\config.py", line 32, in main
    config = _prepareconfig(args, plugins)
  File "C:\Python34\lib\site-packages\_pytest\config.py", line 85, in _prepareconfig
    pluginmanager=pluginmanager, args=args)
  File "C:\Python34\lib\site-packages\_pytest\core.py", line 413, in __call__
    return self._docall(methods, kwargs)
  File "C:\Python34\lib\site-packages\_pytest\core.py", line 424, in _docall
    res = mc.execute()
  File "C:\Python34\lib\site-packages\_pytest\core.py", line 315, in execute
    res = method(**kwargs)
  File "C:\Python34\lib\site-packages\_pytest\helpconfig.py", line 27, in pytest_cmdline_parse
    config = __multicall__.execute()
  File "C:\Python34\lib\site-packages\_pytest\core.py", line 315, in execute
    res = method(**kwargs)
  File "C:\Python34\lib\site-packages\_pytest\config.py", line 636, in pytest_cmdline_parse
    self.parse(args)
  File "C:\Python34\lib\site-packages\_pytest\config.py", line 747, in parse
    self._preparse(args)
  File "C:\Python34\lib\site-packages\_pytest\config.py", line 719, in _preparse
    args=args, parser=self._parser)
  File "C:\Python34\lib\site-packages\_pytest\core.py", line 413, in __call__
    return self._docall(methods, kwargs)
  File "C:\Python34\lib\site-packages\_pytest\core.py", line 424, in _docall
    res = mc.execute()
  File "C:\Python34\lib\site-packages\_pytest\core.py", line 315, in execute
    res = method(**kwargs)
  File "C:\Python34\lib\site-packages\_pytest\capture.py", line 49, in pytest_load_initial_conftests
    capman.init_capturings()
  File "C:\Python34\lib\site-packages\_pytest\capture.py", line 78, in init_capturings
    self._capturing.start_capturing()
  File "C:\Python34\lib\site-packages\_pytest\capture.py", line 257, in start_capturing
    self.in_.start()
  File "C:\Python34\lib\site-packages\_pytest\capture.py", line 345, in start
    raise ValueError("saved filedescriptor not valid anymore")
ValueError: saved filedescriptor not valid anymore

Answer 1

Try adding pytest.main() to the bottom of the script.

Check out: http://pytest.org/latest/usage.html#specifying-tests-selecting-tests for some of the different options and the syntax.

Edit: When running in IDLE, you'll also need to start pytest like this: pytest.main("--capture=sys")