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pytest plugin for providing variables to tests/fixtures

Project description

pytest-variables is a plugin for py.test that provides variables to tests/fixtures as a dict via a JSON file specified on the command line.

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Requirements

You will need the following prerequisites in order to use pytest-variables:

  • Python 2.6, 2.7, 3.2, 3.3, 3.4 or PyPy
  • py.test 2.3 or newer

Installation

To install pytest-variables:

pip install pytest-variables

Specifying variables

Use the –variables command line option to specify one or more paths to JSON files containing your variables:

py.test --variables foo.json bar.json

If multiple files are specified then they will be applied in the order they appear on the command line. When duplicates are encountered, the last to be applied will take priority.

Accessing variables

With a JSON variables file such as:

{
  "foo": "bar",
  "bar": "foo"
}

Specify the variables funcarg to make the variables available to your tests. The contents of the JSON are made available as a dictionary:

def test_foo(self, variables):
    assert variables['foo'] == 'bar'
    assert variables.get('bar') == 'foo'
    assert variables.get('missing') is None

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