Example
Introduction
In this minimalist example, using pytest we're going to test that indeed our Hello World app does return "Hello, World!" with an HTTP OK status code of 200, when hit with a GET request on the URL /
First let's install pytest into our virtualenv
pip install pytest
And just for reference, this our hello world app:
# hello.py
from flask import Flask
app = Flask(__name__)
@app.route('/')
def hello():
return 'Hello, World!'
Defining the test
Along side our hello.py, we define a test module called test_hello.py that is going to be discovered by py.test
# test_hello.py
from hello import app
def test_hello():
response = app.test_client().get('/')
assert response.status_code == 200
assert response.data == b'Hello, World!'
Just to review, at this point our project structure obtained with the tree command is:
.
├── hello.py
└── test_hello.py
Running the test
Now we can run this test with the py.test command that will automatically discover our test_hello.py and the test function inside it
$ py.test
You should see some output and an indication that 1 test has passed, e.g.
=== test session starts ===
collected 1 items
test_hello.py .
=== 1 passed in 0.13 seconds ===
