Add scroll test (#599)

Author: ben-lu-uw

test/e2e/core/scroll.test.js

@@ -0,0 +1,24 @@
+describe("Scroll test", ()=> {
+    beforeAll(async () => {
+        await page.goto(PATH + "mapml-viewer.html");
+    });
+
+    afterAll(async function () {
+        await context.close();
+    });
+
+    test("Scrolling the map does not scroll the document", async ()=>{
+        //Force the windows scroll bar to appear
+        await page.$eval("body > textarea",
+            (textarea) => textarea.setAttribute("cols", 200)
+        );
+        await page.waitForTimeout(1000);
+        await page.keyboard.press("Tab");
+        await page.waitForTimeout(500);
+        await page.keyboard.press("ArrowRight");
+        await page.waitForTimeout(1000);
+
+        const scrollX = await page.evaluate('window.scrollX');
+        expect(scrollX).toEqual(0);
+    });
+});