added app.py

app.py

@@ -0,0 +1,11 @@
+from flask import Flask
+
+app = Flask(__name__)
+
+
+@app.route("/")
+def helloworld():
+    return "Helle from the hell"
+
+if __name__ == "__main__":
+    app.run(debug=True,host="0.0.0.0",port=5000)

tests/__init__.py

@@ -0,0 +1 @@
+# for pytest

tests/conftest.py

@@ -0,0 +1,9 @@
+import pytest
+
+
+@pytest.fixture
+def client():
+    from web import app
+
+    app.app.config['TESTING'] = True
+    yield app.app.test_client()

tests/test_api.py

@@ -0,0 +1,23 @@
+from urllib.parse import urlencode
+import json
+
+
+def call(client, path, params):
+    url = path + '?' + urlencode(params)
+    response = client.get(url)
+    return json.loads(response.data.decode('utf-8'))
+
+
+def test_plus_one(client):
+    result = call(client, '/plus_one', {'x': 2})
+    assert result['x'] == 3
+
+
+def test_plus_two(client):
+    result = call(client, '/plus_two', {'x': 2})
+    assert result['x'] == 4
+
+
+def test_square(client):
+    result = call(client, '/square', {'x': 2})
+    assert result['x'] == 4

web/app.py

@@ -0,0 +1,22 @@
+from flask import request, Flask
+import json
+
+app = Flask(__name__)
+
+
+@app.route('/plus_one')
+def plus_one():
+    x = int(request.args.get('x', 1))
+    return json.dumps({'x': x + 1})
+
+
+@app.route('/plus_two')
+def plus_two():
+    x = int(request.args.get('x', 1))
+    return json.dumps({'x': x + 2})
+
+
+@app.route('/square')
+def square():
+    x = int(request.args.get('x', 1))
+    return json.dumps({'x': x * x})