A framework (based on python) that makes it easy to write small tests, yet scales to support complex functional testing for applications and libraries.
Why do we need Pytest ? why selenium is not enough ?
Selenium performs an action in the browser.
But how we'll create a test to assert our case ? How we’ll run test suite (a bunch of test cases) ?
That's right... we need PyTest...
Build our code structure (Fixtures)
Create Test Suites
Test Runners
Provide Assertions
Let's not waste time and start coding…
Create Folder
My_testsCreate python file
test_utils
1def twice(x):
2 return x * 2
3
4
5def thrice(x):
6 return x * 3
Code conventions:
Files start (or end) with: test_
Methods start with: test_
Class starts with: Test_
Install PyTest:
Install:
pip install -U pytest
Verify correct version:
pytest --version
Note: When you run pytest, by default, it will look for tests in all directories and files below the current directory.
We would like to execute this method: test_demo
Step 1:
Step 2:
Click on Templates → Python tests → pytest
Another option is to run pytest from a CLI:
Type pytest will run all the files under this folder (with the pytest convention)
Type pytest -v -s v= verbose, s=print out on terminal (which mean if I have some print function, print it)
pytest -v -s <file_name> will run pytest only on the specific file
If I want to run pytest only on a specific function, we can run: pytest -v -s -k example
Result:
def test_sanity(): and when we’ll want to run only sanity, it will be very easy ! If I want to skip on some function ? it’s easy ! just give him above @pytest.mark.skip
Result:
Fixtures
Fixture can be thought of as metadata for classes.
These are reserved words.
Their purpose is to structure the code conveniently.
@classmethod
Assertions:
Assertions are checks that return True or False status.
In pytest, if an assertion fails in a test method, then that method execution is stopped there
The remaining code on the test method is not executed and pytest will continue with the next test method.
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