Add create subscription e2e test

tests/playwright/subscriptions-api.spec.js

@@ -0,0 +1,64 @@
+const {test, expect} = require('@playwright/test');
+const {
+    WP_MERCHANT_USER,
+    WP_MERCHANT_PASSWORD,
+    AUTHORIZATION
+} = process.env;
+
+async function loginAsAdmin(page) {
+    await page.goto('/wp-admin');
+    await page.locator('input[name="log"]').fill(WP_MERCHANT_USER);
+    await page.locator('input[name="pwd"]').fill(WP_MERCHANT_PASSWORD);
+    await Promise.all([
+        page.waitForNavigation(),
+        page.locator('text=Log In').click()
+    ]);
+}
+
+test.describe('Merchant', () => {
+    test('Create new subscription product', async ({page, request}) => {
+        await loginAsAdmin(page);
+
+        const title = (Math.random() + 1).toString(36).substring(7);
+        await page.goto('/wp-admin/post-new.php?post_type=product');
+        await page.fill('#title', title);
+        await page.selectOption('select#product-type', 'subscription');
+        await page.fill('#_subscription_price', '10');
+
+        await Promise.all([
+            page.waitForNavigation(),
+            page.locator('#publish').click(),
+        ]);
+
+        const message = await page.locator('.notice-success');
+        await expect(message).toContainText('Product published.');
+
+        const products = await request.get('https://api.sandbox.paypal.com/v1/catalogs/products?page_size=100&page=1&total_required=true', {
+            headers: {
+                'Authorization': AUTHORIZATION,
+                'Content-Type': 'application/json'
+            }
+        });
+        expect(products.ok()).toBeTruthy();
+
+        const productList = await products.json();
+        const product = productList.products.find((p) => {
+            return p.name === title;
+        });
+        await expect(product.id).toBeTruthy;
+
+        const plans = await request.get(`https://api.sandbox.paypal.com/v1/billing/plans?product_id=${product.id}&page_size=10&page=1&total_required=true`, {
+            headers: {
+                'Authorization': AUTHORIZATION,
+                'Content-Type': 'application/json'
+            }
+        });
+        expect(plans.ok()).toBeTruthy();
+
+        const planList = await plans.json();
+        const plan = planList.plans.find((p) => {
+            return p.product_id === product.id;
+        });
+        await expect(plan.id).toBeTruthy;
+    });
+});