How to test a flask app using pytest to get the coverage rate up - sqlite

Question

Currently this is my app.py files
# imports - standard imports
import json
import os
import sqlite3
# imports - third party imports
from flask import Flask, Response, jsonify, redirect
from flask import render_template as render
from flask import request, url_for
DATABASE_NAME = "inventory.sqlite"
# setting up Flask instance
app = Flask(__name__)
app.config.from_mapping(
SECRET_KEY="dev",
DATABASE=os.path.join(app.instance_path, "database", DATABASE_NAME),
)
# listing views
link = {x: x for x in ["location", "product", "movement"]}
link["index"] = "/"
def init_database():
db = sqlite3.connect(DATABASE_NAME)
cursor = db.cursor()
# initialize page content
cursor.execute(
"""
CREATE TABLE IF NOT EXISTS
products(prod_id INTEGER PRIMARY KEY AUTOINCREMENT,
prod_name TEXT UNIQUE NOT NULL,
prod_quantity INTEGER NOT NULL,
unallocated_quantity INTEGER);
"""
)
cursor.execute(
"""
CREATE TRIGGER IF NOT EXISTS default_prod_qty_to_unalloc_qty
AFTER INSERT ON products
FOR EACH ROW
WHEN NEW.unallocated_quantity IS NULL
BEGIN
UPDATE products SET unallocated_quantity = NEW.prod_quantity WHERE rowid = NEW.rowid;
END;
"""
)
# initialize page content
cursor.execute(
"""
CREATE TABLE IF NOT EXISTS location(loc_id INTEGER PRIMARY KEY AUTOINCREMENT,
loc_name TEXT UNIQUE NOT NULL);
"""
)
# initialize page content
cursor.execute(
"""
CREATE TABLE IF NOT EXISTS logistics(trans_id INTEGER PRIMARY KEY AUTOINCREMENT,
prod_id INTEGER NOT NULL,
from_loc_id INTEGER NULL,
to_loc_id INTEGER NULL,
prod_quantity INTEGER NOT NULL,
trans_time TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
FOREIGN KEY(prod_id) REFERENCES products(prod_id),
FOREIGN KEY(from_loc_id) REFERENCES location(loc_id),
FOREIGN KEY(to_loc_id) REFERENCES location(loc_id));
"""
)
db.commit()
#app.route("/product", methods=["POST", "GET"])
def product() -> Response | str:
init_database()
msg = None
db = sqlite3.connect(DATABASE_NAME)
cursor = db.cursor()
cursor.execute("SELECT * FROM products")
products = cursor.fetchall()
if request.method == "POST":
prod_name = request.form["prod_name"]
quantity = request.form["prod_quantity"]
transaction_allowed = False
if prod_name not in ["", " ", None] and quantity not in ["", " ", None]:
transaction_allowed = True
if transaction_allowed:
try:
cursor.execute(
"INSERT INTO products (prod_name, prod_quantity) VALUES (?, ?)",
(prod_name, quantity),
)
db.commit()
except sqlite3.Error as e:
msg = f"An error occurred: {e.args[0]}"
else:
msg = f"{prod_name} added successfully"
if msg:
print(msg)
return redirect(url_for("product"))
return render(
"product.html",
link=link,
products=products,
transaction_message=msg,
title="Products Log",
)
and this is my test function in test_product.py. I want to test my function to get my coverage on sonarcloud to be 100%. And the pytest function below seems to have no use. I must say I am very beginner to it and I am still learning.
import requests
import app
import pytest
ENDPOINT = "http://127.0.0.1:5000/product"
app.init_database()
def test_product_GET():
response = requests.get(ENDPOINT)
assert response.status_code == 200
# assert "Products Log" in response.text
#pytest.fixture()
def test_product_POST_valid():
response = requests.post(ENDPOINT, data={"prod_name": "product1", "prod_quantity": "10"}, allow_redirects=True)
assert response.status_code == 200
# assert "product1 added successfully" in response.text
#pytest.fixture()
def test_product_POST_invalid():
response = requests.post(ENDPOINT, data={"prod_name": "", "prod_quantity": ""}, allow_redirects=True)
assert response.status_code == 200
# assert "An error occurred" in response.text
I am not sure of how to make this work wihtout using request and it does have 0% coverage and I want to test this code in sonarcloud