tags | test case for print

snippet 1:

def test_foo(capsys):
    ...
    captured = capsys.readouterr()
    ...
    assert captured.out == expected_output

snippet 2:

out, error = capsys.readouterr()

• See https://docs.pytest.org/en/stable/capture.html#accessing-captured-output-from-a-test-function for help on how capsys works in pytest.
• https://stackoverflow.com/a/56300627/6305733 - contains a simple example; I first came across capsys here.
• my usages:
  • https://github.com/KamarajuKusumanchi/rutils/blob/master/python3/tests/lib/test_DataFrameUtils.py - tests dataframe printed to stdout
  • https://github.com/KamarajuKusumanchi/rutils/blob/master/python3/tests/test_get_column_names.py - I used capsys for the first time here

• https://stackoverflow.com/questions/35353771/invoke-pytest-from-python-for-current-module-only - gives the solution
• https://docs.pytest.org/en/stable/usage.html#calling-pytest-from-python-code

tags | run pytest from main function, pytest run parameterized test