From 9f1b2f68bf5de8043d161aa179f332dd01bc01f4 Mon Sep 17 00:00:00 2001
From: Pavel Feldman <pavel.feldman@gmail.com>
Date: Tue, 23 Mar 2021 11:44:26 +0800
Subject: [PATCH] test(resize): add a screenshot resize test (#5907)

---
 test/elementhandle-screenshot.spec.ts | 14 ++++++++++++++
 test/page-screenshot.spec.ts          | 13 +++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/test/elementhandle-screenshot.spec.ts b/test/elementhandle-screenshot.spec.ts
index 5c9741f53919b..66ffb55733914 100644
--- a/test/elementhandle-screenshot.spec.ts
+++ b/test/elementhandle-screenshot.spec.ts
@@ -401,4 +401,18 @@ describe('element screenshot', (suite, parameters) => {
     const buffer = await elementHandle.screenshot({ path: outputPath, type: 'jpeg' });
     expect([buffer[0], buffer[1], buffer[2]]).toEqual([0xFF, 0xD8, 0xFF]);
   });
+
+  it('should not issue resize event', async ({page, server}) => {
+    await page.goto(server.PREFIX + '/grid.html');
+    let resizeTriggered = false;
+    await page.exposeFunction('resize', () => {
+      resizeTriggered = true;
+    });
+    await page.evaluate(() => {
+      window.addEventListener('resize', () => (window as any).resize());
+    });
+    const elementHandle = await page.$('.box:nth-of-type(3)');
+    await elementHandle.screenshot();
+    expect(resizeTriggered).toBeFalsy();
+  });
 });
diff --git a/test/page-screenshot.spec.ts b/test/page-screenshot.spec.ts
index e60ea1ed22051..e0af838cf87cf 100644
--- a/test/page-screenshot.spec.ts
+++ b/test/page-screenshot.spec.ts
@@ -341,4 +341,17 @@ describe('page screenshot', (suite, { browserName, headful }) => {
     expect(pixel(0, 8339).r).toBeLessThan(128);
     expect(pixel(0, 8339).b).toBeGreaterThan(128);
   });
+
+  it('should not issue resize event', async ({page, server}) => {
+    await page.goto(server.PREFIX + '/grid.html');
+    let resizeTriggered = false;
+    await page.exposeFunction('resize', () => {
+      resizeTriggered = true;
+    });
+    await page.evaluate(() => {
+      window.addEventListener('resize', () => (window as any).resize());
+    });
+    await page.screenshot();
+    expect(resizeTriggered).toBeFalsy();
+  });
 });