verify

Verify is a painless assertion library for Python.

Quickstart

Install using pip:

pip install verify

Verify some value using verify’s assertions:

import verify
from verify import Expect, Not

Expect(5 * 5,
       verify.Truthy(),
       Not(verify.Falsy),
       verify.Greater(15),
       verify.Less(30))

Expect(lambda: 5 * 5,
       verify.GreaterEqual(15),
       verify.Less(30))

Verify using your own functions:

def is_just_right(value):
    assert 20 <= value <= 30, "it's just not right"

# Passes
Expect(25, is_just_right)

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

Under the hood the value that’s passed to Expect will be piped through all of the assertion callables that are passed to it.

You can also use the verify assertions on their own:

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

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

Validators

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

By themselves as in Equal(a, b) which will raise an AssertionError if false.
In combination with Except as in Expect(a, Equal(b)).

The available validators are:

Validator	Description
Not	Assert the negation of a callable
Equal	Assert that a == b
Greater	Assert that a > b
GreaterEqual	Assert that a >= b
Less	Assert that a < b
LessEqual	Assert that a <= b
Is	Assert that a is b
In	Assert that a in b
InstanceOf	Assert that isinstance(a, b)
Truthy	Assert that bool(a)
Falsy	Assert that not bool(a)
IsNone	Assert that a is None

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

Release files for verify 0.0.1

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for verify 0.0.1
File	Size	Uploaded
verify-0.0.1.tar.gz	5.3 kB	May 8, 2015	Details

Built distribution (wheel)

Table of built distributions (wheels) for verify 0.0.1
File	Interpreter	ABI	Platform	Reset
verify-0.0.1-py2.py3-none-any.whl 6.2 kB May 8, 2015	Python 2, Python 3	none	any	Details

Total release size: 11.5 kB

Release files / verify-0.0.1.tar.gz

Download URL	verify-0.0.1.tar.gz
Size	5.3 kB
Tags	Source
SHA-256 checksum How to use checksums	`c9c5ff77ff76eec4a11cd3b3387cd98de43bbecae360b83f35116957791b74ec`
BLAKE2b-256 checksum How to use checksums	`d8fee5686d4d73dde85bb7a733aaf808bb03b22175235d4616f239c2c9fe4a11`
Upload date	May 8, 2015
Uploaded using Trusted Publishing? What is trusted publishing?	No

Release files / verify-0.0.1-py2.py3-none-any.whl

Download URL	verify-0.0.1-py2.py3-none-any.whl
Size	6.2 kB
Tags	Python 2 Python 3
SHA-256 checksum How to use checksums	`9449c721bdae222ade50e7d486bdb1222e9c0b240d12c56d5eb35827604bd628`
BLAKE2b-256 checksum How to use checksums	`d5ce17bef81d706c639540b0ef54aa6ebc74ba496cc98969841ba1fe12df1583`
Upload date	May 8, 2015
Uploaded using Trusted Publishing? What is trusted publishing?	No