tests: ébauche des tests d'intégration via Playwright

tests/playwright/product.spec.ts

@@ -0,0 +1,114 @@
+import { test as base, expect, Response } from "@playwright/test";
+import {
+  WCV3Product,
+  WCV3Products,
+} from "../../web/app/themes/haiku-atelier-2024/src/scripts/lib/types/api/v3/products";
+
+/*
+ * Faire un premier test simple où l'on clic sur la première carte du shop
+ * On doit pouvoir naviguer sur la page
+ * Le produit ne DOIT pas avoir de variations (pour l'instant)
+ * Le bouton d'ajout du panier doit être visible
+ * (Si le produit n'est pas en stock) On ne doit pas pouvoir ajouter le produit au panier
+ *   Le bouton doit afficher le texte "Out of stock"
+ *   Le bouton doit être désactivé
+ */
+
+type ProductsFixture = {
+  products: WCV3Products;
+};
+
+export const test = base.extend<ProductsFixture>({
+  products: async ({ page, request }, use) => {
+    await page.goto("/shop");
+    const nonce = await page.locator("data#nonce").textContent();
+    const authString = await page.locator("data#auth-string").textContent();
+
+    if (nonce === null || nonce === "") {
+      throw new Error("Le nonce ne peut être vide.");
+    }
+    if (authString === null || authString === "") {
+      throw new Error("L'en-tête auth-string ne peut être vide.");
+    }
+
+    const response = await request.get("/wp-json/wc/v3/products?page=1&per_page=100&status=publish", {
+      headers: { Nonce: nonce, Authorization: `Basic ${authString}` },
+    });
+    expect(response.ok(), "The API returned the list of every Product").toBeTruthy();
+
+    const products = await response.json() as WCV3Products;
+    await use(products);
+  },
+});
+
+test("can add a Product without variation with stock to the Cart", async ({ products, page }) => {
+  const simpleProducts = products.filter(p => isSimpleProduct(p) && hasQuantity(p));
+  console.debug("Simple Products with stock", simpleProducts.length);
+  expect(simpleProducts.length, "At least one Simple product with stock must exist").toBeGreaterThan(0);
+
+  // Prend un produit au hasard.
+  const randomProductIndex = getRandomIntInclusive(0, simpleProducts.length - 1);
+  const randomProduct = simpleProducts.at(randomProductIndex);
+  expect(randomProduct, "The selected random Product must exist").toBeTruthy();
+  if (randomProduct === undefined) {
+    throw new Error("The random product can't be undefined");
+  }
+
+  // Va à la page du Produit.
+  await page.goto(randomProduct.permalink);
+
+  // Vérifie le bon état du bouton de l'ajout au Panier.
+  const addToCartButton = page.getByRole("button", { name: "Add to cart", disabled: false });
+  await addToCartButton.scrollIntoViewIfNeeded();
+  await expect(addToCartButton, "The add to cart button must be visible").toBeVisible();
+  await expect(addToCartButton, "The add to cart button must be enabled").toBeEnabled();
+
+  // Vérifie qu'au clic sur le bouton, l'ajout au Panier retourne un succès.
+  const addToCartResponse: Promise<Response> = page.waitForResponse(
+    new RegExp(".*/wp-json/wc/store/cart/add-item"),
+  );
+  await addToCartButton.click();
+  const addToCartStatus = (await addToCartResponse).ok();
+  expect(addToCartStatus, "The cart addition must succeed").toBeTruthy();
+
+  // Vérifie que le bouton ait changé de texte.
+  const addedToCartButton = page.getByRole("button", { name: "Added to cart!" });
+  expect(addedToCartButton, "The add to cart button's text has changed").toBeDefined();
+
+  // Vérifie que le compteur d'articles dans le Panier soit incrémenté.
+  const cartLink = page.getByRole("link", { name: "cart (1)" });
+  expect(cartLink, "The cart items' indicator has been incremented").toBeDefined();
+});
+
+test("can't add a Product without variation without stock to the Cart", async ({ products, page }) => {
+  const simpleProducts = products.filter(p => isSimpleProduct(p) && !hasQuantity(p));
+  console.debug("Simple Products without stock", simpleProducts.length);
+  expect(simpleProducts.length, "At least one Simple product without stock must exist").toBeGreaterThan(0);
+
+  // Prend un produit au hasard.
+  const randomProductIndex = getRandomIntInclusive(0, simpleProducts.length - 1);
+  const randomProduct = simpleProducts.at(randomProductIndex);
+  expect(randomProduct, "The selected random Product must exist").toBeTruthy();
+  if (randomProduct === undefined) {
+    throw new Error("The random product can't be undefined");
+  }
+
+  // Va à la page du Produit.
+  await page.goto(randomProduct.permalink);
+
+  // Vérifie le bon état du bouton de l'ajout au Panier.
+  const outOfStockButton = page.getByRole("button", { name: "Out of stock", disabled: true });
+  await outOfStockButton.scrollIntoViewIfNeeded();
+  await expect(outOfStockButton, "The add to cart button must be visible").toBeVisible();
+  await expect(outOfStockButton, "The add to cart button must be disabled").toBeDisabled();
+});
+
+const getRandomIntInclusive = (min: number, max: number): number => {
+  const minCeiled = Math.ceil(min);
+  const maxFloored = Math.floor(max);
+
+  return Math.floor(Math.random() * (maxFloored - minCeiled + 1) + minCeiled);
+};
+
+const isSimpleProduct = (product: WCV3Product) => product.type === "simple";
+const hasQuantity = (product: WCV3Product) => (product.stock_quantity ?? 0) > 0;