add e2e test - add scaffolding

.github/workflows/playwright.yml

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+name: Playwright Tests
+on:
+  push:
+    branches: [ main, master ]
+  pull_request:
+    branches: [ main, master ]
+jobs:
+  test:
+    timeout-minutes: 60
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/setup-node@v3
+      with:
+        node-version: 18
+    - name: Install dependencies
+      run: npm ci
+    - name: Install Playwright Browsers
+      run: npx playwright install --with-deps
+    - name: Run Playwright tests
+      run: npx playwright test
+    - uses: actions/upload-artifact@v3
+      if: always()
+      with:
+        name: playwright-report
+        path: playwright-report/
+        retention-days: 30

e2e/.gitignore

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+node_modules/
+/test-results/
+/playwright-report/
+/blob-report/
+/playwright/.cache/

e2e/package.json

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+{
+  "name": "tests",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {},
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "@playwright/test": "^1.40.1",
+    "@types/node": "^20.10.4"
+  }
+}

e2e/pages/token-bridge.page.ts

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+import type { Page, Locator } from '@playwright/test';
+
+export class TokenBridgePage {
+  protected readonly inputBox: Locator;
+  protected readonly todoItems: Locator;
+
+  constructor(public readonly page: Page) {
+    this.inputBox = this.page.locator('input.new-todo');
+    this.todoItems = this.page.getByTestId('todo-item');
+  }
+
+  async goto() {
+    await this.page.goto('https://demo.playwright.dev/todomvc/');
+  }
+
+  async addToDo(text: string) {
+    await this.inputBox.fill(text);
+    await this.inputBox.press('Enter');
+  }
+
+  async remove(text: string) {
+    const todo = this.todoItems.filter({ hasText: text });
+    await todo.hover();
+    await todo.getByLabel('Delete').click();
+  }
+
+  async removeAll() {
+    while ((await this.todoItems.count()) > 0) {
+      await this.todoItems.first().hover();
+      await this.todoItems.getByLabel('Delete').first().click();
+    }
+  }
+}

e2e/pages/usdc-bridge.page.ts

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+import type { Page, Locator } from '@playwright/test';
+import { TokenBridgePage } from './token-bridge.page';
+
+export class USDCBridgePage extends TokenBridgePage {
+
+  constructor(public readonly page: Page) {
+    super(page);
+  }
+
+  async goto() {
+    await this.page.goto('https://demo.playwright.dev/todomvc/');
+  }
+
+  async addToDo(text: string) {
+    await this.inputBox.fill(text);
+    await this.inputBox.press('Enter');
+  }
+
+  async remove(text: string) {
+    const todo = this.todoItems.filter({ hasText: text });
+    await todo.hover();
+    await todo.getByLabel('Delete').click();
+  }
+
+  async removeAll() {
+    while ((await this.todoItems.count()) > 0) {
+      await this.todoItems.first().hover();
+      await this.todoItems.getByLabel('Delete').first().click();
+    }
+  }
+}

e2e/playwright.config.ts

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+import { defineConfig, devices } from '@playwright/test';
+
+/**
+ * Read environment variables from file.
+ * https://github.com/motdotla/dotenv
+ */
+// require('dotenv').config();
+
+/**
+ * See https://playwright.dev/docs/test-configuration.
+ */
+export default defineConfig({
+  testDir: './tests',
+  /* Run tests in files in parallel */
+  fullyParallel: true,
+  /* Fail the build on CI if you accidentally left test.only in the source code. */
+  forbidOnly: !!process.env.CI,
+  /* Retry on CI only */
+  retries: process.env.CI ? 2 : 0,
+  /* Opt out of parallel tests on CI. */
+  workers: process.env.CI ? 1 : undefined,
+  /* Reporter to use. See https://playwright.dev/docs/test-reporters */
+  reporter: 'html',
+  /* Shared settings for all the projects below. See https://playwright.dev/docs/api/class-testoptions. */
+  use: {
+    /* Base URL to use in actions like `await page.goto('/')`. */
+    // baseURL: 'http://127.0.0.1:3000',
+
+    /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
+    trace: 'on-first-retry',
+  },
+
+  /* Configure projects for major browsers */
+  projects: [
+    {
+      name: 'chromium',
+      use: { ...devices['Desktop Chrome'] },
+    },
+
+    {
+      name: 'firefox',
+      use: { ...devices['Desktop Firefox'] },
+    },
+
+    {
+      name: 'webkit',
+      use: { ...devices['Desktop Safari'] },
+    },
+
+    /* Test against mobile viewports. */
+    // {
+    //   name: 'Mobile Chrome',
+    //   use: { ...devices['Pixel 5'] },
+    // },
+    // {
+    //   name: 'Mobile Safari',
+    //   use: { ...devices['iPhone 12'] },
+    // },
+
+    /* Test against branded browsers. */
+    // {
+    //   name: 'Microsoft Edge',
+    //   use: { ...devices['Desktop Edge'], channel: 'msedge' },
+    // },
+    // {
+    //   name: 'Google Chrome',
+    //   use: { ...devices['Desktop Chrome'], channel: 'chrome' },
+    // },
+  ],
+
+  /* Run your local dev server before starting the tests */
+  // webServer: {
+  //   command: 'npm run start',
+  //   url: 'http://127.0.0.1:3000',
+  //   reuseExistingServer: !process.env.CI,
+  // },
+});