Senior usage of the "Pyvows" library sharing with actual combat cases
Senior usage of the "Pyvows" library sharing with actual combat cases
Overview:
Pyvows is a library for writing and executing the Python unit test. It provides a structured method to write test code that is easy to read and maintain.This article will introduce the advanced usage of the Pyvows class library and share a practical case to help readers better understand the function and usage of the library.
1. Installation and configuration:
First, we need to install Pyvows in the Python environment.Use the following commands to install the Pyvows library through PIP:
pip install pyvows
After the installation is completed, we can run the `Pyvows` command in the command line to execute the test code.
2. Write test case:
Pyvows write test cases in a descriptive way, which makes the test code easier to understand and maintain.Below is a simple example testing example:
python
from pyvows import Vows, expect
@Vows.batch
class MathVows(Vows.Context):
def topic(self):
return 4 + 5
def should_be_nine(self, topic):
expect(topic).to_equal(9)
def should_not_be_ten(self, topic):
expect(topic).Not.to_equal(10)
The `mathvows` class in the above code is used to describe a set of test cases, and uses the`@vOWS.BATCH` decorator to mark it into a batch of tests.
The `Topic` method defines a theme, which returns the actual value of testing to test.In this example, the theme returns 4+5 results.
`Should_Be_nine` Method is a test case that is used to verify whether the theme value is equal to 9.`Should_not_be_ten` Method that the value of the theme is not equal to 10.
3. Run test case:
After writing test cases, we can use Pyvows to perform these tests.Run the `pyvows` command in the command line, which will automatically search for the test code in the current directory and execute it.
pyvows
During the execution, Pyvows will perform test cases one by one and output test results.If all test cases are passed, the "√ All VOWS PASS" message will be displayed; if there are any failed test cases, the corresponding error message will be displayed.
4. Cases:
Below we take a simple API service test case as an example to show Pyvows advanced usage.
python
from pyvows import Vows, expect
from myapp import app
@Vows.batch
class APIVows(Vows.Context):
def topic(self):
with app.test_client() as client:
response = client.get('/api/resource')
return response
def should_return_status_code_200(self, topic):
expect(topic.status_code).to_equal(200)
def should_return_valid_json(self, topic):
expect(topic.get_json()).to_be_instance_of(dict)
expect(topic.get_json()).to_include_key('data')
def should_return_expected_data(self, topic):
data = topic.get_json()
expect(data['data']).to_equal('Hello, world!')
In this case, we use Pyvows to test a simple API service.We first create a Flask application object `app`, and then use the` test_client () `method to create a test client.We send a GET request to obtain resources from `/API/Resource` and return the response object as the theme.
Next, we wrote three test cases to verify the API behavior.We first verify whether the returned status code is 200, and then verify whether the returned data is an effective JSON format, and contains the `Data` key.Finally, we verify whether the returned data is equal to the expected value.
This case can be executed by running the `Pyvows` command, we can ensure that the API service work is expected, and each test case is passed.
in conclusion:
This article introduces the premium usage of the Pyvows class library and actual combat cases.Through Pyvows, we can write a test code that is easy to understand and maintain in a structured way, thereby improving the readability and maintenance of the test.Whether it is a simple mathematical calculation or a complex API service, Pyvows can help us write effective test cases and verify the correctness of the code.
