Add playwright test

index.js

@@ -19,7 +19,7 @@ async function sortHackerNewsArticles() {
     let datespans = await page.locator(".age").all();
 
     // iterate through date spans to get timestamps
-    for (row = 0; row < datespans.length; row++) {
+    for (var row = 0; row < datespans.length; row++) {
       // turn timestamp strings into date objects and push to array
       datestamps.push(new Date(await datespans[row].getAttribute("title")));
     }

playwright.config.js

@@ -1,5 +1,5 @@
 // @ts-check
-const { defineConfig, devices } = require('@playwright/test');
+const { defineConfig, devices } = require("@playwright/test");
 
 /**
  * Read environment variables from file.
@@ -11,7 +11,7 @@ const { defineConfig, devices } = require('@playwright/test');
  * @see https://playwright.dev/docs/test-configuration
  */
 module.exports = defineConfig({
-  testDir: './tests',
+  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. */
@@ -21,32 +21,32 @@ module.exports = defineConfig({
   /* 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',
+  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',
+    trace: "on-first-retry",
   },
 
   /* Configure projects for major browsers */
   projects: [
     {
-      name: 'chromium',
-      use: { ...devices['Desktop Chrome'] },
+      name: "chromium",
+      use: { ...devices["Desktop Chrome"], headless: false },
     },
 
-    {
-      name: 'firefox',
-      use: { ...devices['Desktop Firefox'] },
-    },
+    // {
+    //   name: 'firefox',
+    //   use: { ...devices['Desktop Firefox'] },
+    // },
 
-    {
-      name: 'webkit',
-      use: { ...devices['Desktop Safari'] },
-    },
+    // {
+    //   name: 'webkit',
+    //   use: { ...devices['Desktop Safari'] },
+    // },
 
     /* Test against mobile viewports. */
     // {
@@ -76,4 +76,3 @@ module.exports = defineConfig({
   //   reuseExistingServer: !process.env.CI,
   // },
 });
-

tests/sort.spec.js

@@ -0,0 +1,30 @@
+const { expect, test } = require("playwright/test");
+
+test("First 100 articles sorted", async ({ page }) => {
+  // go to Hacker News
+  await page.goto("https://news.ycombinator.com/newest");
+
+  // instantiate empty array for all date objects
+  let datestamps = [];
+
+  // loop through process per page
+  for (var pageview = 0; pageview <= 3; pageview++) {
+    // locate each article's age span
+    let datespans = await page.locator(".age").all();
+
+    // iterate through date spans to get timestamps
+    for (var row = 0; row < datespans.length; row++) {
+      // turn timestamp strings into date objects and push to array
+      datestamps.push(new Date(await datespans[row].getAttribute("title")));
+    }
+
+    // click the next button as needed
+    await page.getByRole("link", { name: "More", exact: true }).click();
+  }
+
+  // drop extra array elements
+  datestamps.splice(100, 20);
+
+  // Expect match
+  await expect(datestamps === datestamps.sort()).toBeTruthy;
+});