safeguard against IndexError

[brondsem]

I got this error (also reported by others at #190)

INTERNALERROR>   File "/Users/brondsem/dev/pytest-sugar/pytest_sugar.py", line 482, in pytest_runtest_logreport
INTERNALERROR>     self.insert_progress(report)
INTERNALERROR>   File "/Users/brondsem/dev/pytest-sugar/pytest_sugar.py", line 359, in insert_progress
INTERNALERROR>     append_string = get_progress_bar()
INTERNALERROR>                     ^^^^^^^^^^^^^^^^^^
INTERNALERROR>   File "/Users/brondsem/dev/pytest-sugar/pytest_sugar.py", line 350, in get_progress_bar
INTERNALERROR>     progressbar += colored(bar[block], theme, on_color)
INTERNALERROR>                            ~~~^^^^^^^
INTERNALERROR> IndexError: string index out of range

I was able to reproduce it with @flaky. In most situations everything runs fine, but with a large # of tests I was able to reproduce. Other plugins/configs might be able to trigger it also, not sure. Here's the flaky example:

import pytest
from flaky import flaky

@pytest.mark.parametrize("x", range(200))
def test_lots1(x):
    assert True

@flaky
def test_flaky():
    assert False

@pytest.mark.parametrize("x", range(80))
def test_lots2(x):
    assert True

So I've added a simple safeguard to avoid the error.

[sweh]

I'm getting the same error message in my project. This fix resolves it. Could the maintainer please merge and release it?

[auvipy]

can you please also add the flaky example as tests to verify this?

[brondsem]

Test added

[auvipy]

thanks a lot!