Skip to main content

Terse mock expectations for Python and Mock

Project description

# expect

Inspired by [RSpec's test doubles][2] and [Expecter Gadget][3].

Uses [Mock][1] but provides a terser syntax for expectations.

Example:

```python
>>> def assert_equal(lhs, rhs):
... assert lhs == rhs
>>> from expect import new_expect
>>> expect = new_expect(__eq__=assert_equal)
>>> expect(2) == 2
>>> expect(2) == 3
Traceback (most recent call last):
...
AssertionError

>>> class MyClass(object):
... @classmethod
... def my_method(cls, arg):
... pass

>>> # Stubs don't have to be called.
>>> expect(MyClass).stub('my_method').with_(1).and_return(2)
>>> MyClass.my_method(1)
2
>>> expect.reset()

>>> # Mocks
>>> expect(MyClass).should_receive('my_method').with_(1).and_return(2)
>>> expect.verify()
Traceback (most recent call last):
...
AssertionError: Expected to be called once. Called 0 times.

```

[1]: http://www.voidspace.org.uk/python/mock/
[2]: https://github.com/rspec/rspec-mocks
[3]: https://github.com/garybernhardt/expecter

Project details


Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Huawei Huawei PSF Sponsor Microsoft Microsoft PSF Sponsor NVIDIA NVIDIA PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page