verify 0.1.1

Links

• Project: https://github.com/dgilland/verify

• Documentation: http://verify.readthedocs.org

• PyPI: https://pypi.python.org/pypi/verify/

• TravisCI: https://travis-ci.org/dgilland/verify

Quickstart

Install using pip:

pip install verify

Verify some value using multiple assertions:

from verify import expect, Not, Truthy, Falsy, Less, Greater

expect(5 * 5,
       Truthy(),
       Not(Falsy),
       Greater(15),
       Less(30))

Verify using your own assert functions:

def is_just_right(value):
    assert value != 'too cold' and value != 'too hot', 'Not just right!'

# Passes
expect(25, is_just_right)

# Fails
try:
    expect(31, is_just_right)
except AssertionError:
    raise

Or your own predicate functions:

def is_awesome(value):
    return 'awesome' in value

def is_more_awesome(value):
    return value > 'awesome'

expect('so awesome', is_awesome, is_more_awesome)

But you don’t have to use expect since the verify assertions can be used on their own:

import verify

# These would pass.
verify.Truthy(1)
verify.Equal(2, 2)
verify.Greater(3, 2)

# These would fail with an AssertionError
verify.Truthy(0)
verify.Equal(2, 3)
verify.Greater(2, 3)

And if you’d prefer to see assert being used, all verify assertions will return True if no AssertionError is raised:

assert Truthy(1)
assert Except(1, Truthy(), Number())

Validators

All of the validators in verify are callables that can be used in two contexts:

1. By themselves as in Equal(a, b) which will raise an AssertionError if false.

2. In combination with except as in expect(a, Equal(b)) which could also raise an AssertionError.

The available validators are:

For more details, please see the full documentation at http://verify.readthedocs.org.