Software Testings

Types

Consider the following graph, each node is a function,

graph LR A --> B; B --> C; C --> D; A --> C;

Unit testing

It is used for testing independent components of your software, for example, writing a unittest for function A to check expected output.

Mock testing

Mocking means creating a fake version of an external or internal service that can stand in for the real one, helping your tests run more quickly and more reliably. When your implementation interacts with an object’s properties, rather than its function or behavior, a mock can be used.

For example, function C is highly dependent on A and B, it is hard to test it independently, you might need to fake A and B to make C outputing expected results.

System testing

It is used to test the whole program, ignoring individual components. You input expected arguments, and test the expected outputs.

Example

flowchart LR A[app] --> C[app.py]; subgraph src; C; end; A--> E[test_app.py]; subgraph tests; E; end;


from flask_jsonpify import jsonpify
from flask import Flask, request

app = Flask(__name__)

@app.route("/")
def home():
    return jsonpify({'output':'Hello World'})

if __name__ == "__main__":
    app.run()

export PYTHONPATH=src


from app import *
import unittest
import json

def test_home():
    assert home.__name__=='home'

class MyAppCase(unittest.TestCase):
    def setUp(self):
        app.config['TESTING'] = True
        self.app = app.test_client()
    def test_home(self):
        resp = self.app.get('/')
        data = json.loads(resp.get_data(as_text=True))
        self.assertEqual(data['output'],'Hello World')

In your app folder, run pytest.

Software Testings

Types

Example

References