Pytest with Docker - test internally

This is the same type of test we aready saw in which we use the test_client of Flask and we do not start a real web server.

pytest test_app.py

import app


def test_app():
    web = app.calcapp.test_client()

    rv = web.get('/')
    assert rv.status == '200 OK'
    assert rv.headers['Content-Type'] == 'text/html; charset=utf-8'
    assert b'Send a GET request to /api/calc and get a JSON response.' == rv.data

def test_calc():
    web = app.calcapp.test_client()

    rv = web.get('/api/calc?a=10&b=2')
    assert rv.status == '200 OK'
    assert rv.headers['Content-Type'] == 'application/json'
    resp = rv.json
    assert resp == {
        "a"        :  10,
        "b"        :  2,
        "add"      :  12,
    }