How to introduce and use the "Pyvows" library in Python
Pyvows is a VOWS -based test library that is used to write and execute asynchronous Python test.VOWS is a popular JavaScript asynchronous testing framework. Pyvows is designed to write and perform Python tests in the same way.
Using Pyvows can easily write test kits and test cases, and perform these tests to verify the correctness of the code.Below is the method and related configuration of Pyvows.
1. Install Pyvows:
Install PYVOWS with PIP:
$ pip install pyvows
2. Write test kit:
Create a Python file for writing a test kit.In the test kit, multiple test cases can be defined to test different functions or methods.
python
from pyvows import Vows, expect
@Vows.batch
class MyTestCase(Vows.Context):
def topic(self):
return 2 + 2
def should_equal_four(self, topic):
expect(topic).to_equal(4)
def should_not_equal_five(self, topic):
expect(topic).Not.to_equal(5)
In the above example, `mytestcase` is a test class that inherits from the` VOWS.Context`.Two test cases are defined in this class, namely `slowd_equal_four` and` should_not_equal_five`.The `Topic` method returns the theme to test, that is, the return value of the test method.Each test case uses the `Expect` to assert the statement to verify whether the theme value meets the expectations.
3. Execute test:
Perform the following commands in the command line to run the test kit:
$ pyvows my_test_file.py
After executing the command, Pyvows will run all test cases in the test kit and output the test results.
PyVows(my_test_file.py)
.MyTestCase
.should_equal_four
.should_not_equal_five
OK (2 tests)
The test cases in the above example passed the test, showing two verification points.
In addition to the above basic usage, Pyvows also provides many other configuration and functions, such as asynchronous testing, front/rear events, errors, etc.You can check the official documentation of Pyvows to learn more details.
Summary: Pyvows is a library for writing and performing asynchronous Python tests.By writing a test kit and test cases, the correctness of the code can be verified.Use PIP to install pyvows and run the test kit through the command line.Use an assertive sentence in the test to verify the value of the theme.
