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- This test failed 82 times in the preceding 30 days. quicksearch this test
- Manifest: browser/base/content/test/zoom/browser.toml
/* Any copyright is dedicated to the Public Domain.
"use strict";
const TEST_PAGE_URL =
"data:text/html;charset=utf-8,<body>test_keyboard_mousewheel_consistency</body>";
const WHEEL_ZOOM_IN = -1;
const WHEEL_ZOOM_OUT = 1;
/**
* Tests that keyboard zoom (Ctrl+/- keys) and mouse wheel zoom (Ctrl+wheel)
* step through the same predefined zoom levels consistently, ensuring both
* methods can reach all standard zoom levels including 100%.
*/
async function synthesizeMouseWheelZoom(browser, direction, expectedZoom) {
await BrowserTestUtils.synthesizeMouse(
null,
10,
10,
{
wheel: true,
ctrlKey: true,
deltaY: direction,
deltaMode: WheelEvent.DOM_DELTA_LINE,
},
browser
);
await TestUtils.waitForCondition(
() => {
return ZoomManager.getZoomForBrowser(browser) == expectedZoom;
},
`Waiting for mousewheel zoom to ${expectedZoom * 100}%`
);
}
add_task(async function test_keyboard_mousewheel_zoom_consistency() {
// One some platforms, Ctrl-Wheel doesn't zoom by default, so we'll enable
// that for this test.
await SpecialPowers.pushPrefEnv({
set: [["mousewheel.with_control.action", 3]],
});
await BrowserTestUtils.withNewTab(TEST_PAGE_URL, async browser => {
let currentZoom = ZoomManager.getZoomForBrowser(browser);
Assert.equal(currentZoom, 1, "Initial zoom should be 100%");
await FullZoom.enlarge();
Assert.equal(
ZoomManager.getZoomForBrowser(browser),
1.1,
"First enlarge should go to 110%"
);
await FullZoom.enlarge();
Assert.equal(
ZoomManager.getZoomForBrowser(browser),
1.2,
"Second enlarge should go to 120%"
);
await FullZoom.enlarge();
Assert.equal(
ZoomManager.getZoomForBrowser(browser),
1.33,
"Third enlarge should go to 133%"
);
await synthesizeMouseWheelZoom(browser, WHEEL_ZOOM_OUT, 1.2);
await synthesizeMouseWheelZoom(browser, WHEEL_ZOOM_OUT, 1.1);
await synthesizeMouseWheelZoom(browser, WHEEL_ZOOM_OUT, 1);
Assert.equal(
ZoomManager.getZoomForBrowser(browser),
1,
"Should return to 100% after zooming out from 133%"
);
await synthesizeMouseWheelZoom(browser, WHEEL_ZOOM_OUT, 0.9);
Assert.equal(
ZoomManager.getZoomForBrowser(browser),
0.9,
"Should be at 90% after one more zoom out"
);
await synthesizeMouseWheelZoom(browser, WHEEL_ZOOM_IN, 1);
await synthesizeMouseWheelZoom(browser, WHEEL_ZOOM_IN, 1.1);
await synthesizeMouseWheelZoom(browser, WHEEL_ZOOM_IN, 1.2);
Assert.equal(
ZoomManager.getZoomForBrowser(browser),
1.2,
"Should be at 120% after zooming back in with wheel"
);
await FullZoom.reduce();
Assert.equal(
ZoomManager.getZoomForBrowser(browser),
1.1,
"First keyboard reduce should go to 110%"
);
await FullZoom.reduce();
Assert.equal(
ZoomManager.getZoomForBrowser(browser),
1,
"Second keyboard reduce should go to 100%"
);
await FullZoom.reduce();
Assert.equal(
ZoomManager.getZoomForBrowser(browser),
0.9,
"Third keyboard reduce should go to 90%"
);
await FullZoom.reset();
});
});