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-rw-r--r--devtools/client/responsive/test/browser/browser_window_sizing.js87
1 files changed, 87 insertions, 0 deletions
diff --git a/devtools/client/responsive/test/browser/browser_window_sizing.js b/devtools/client/responsive/test/browser/browser_window_sizing.js
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+++ b/devtools/client/responsive/test/browser/browser_window_sizing.js
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+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests that correct window sizing values are reported and unaffected by zoom. In
+// particular, we want to ensure that the values for the window's outer and screen
+// sizing values reflect the size of the viewport.
+
+const TEST_URL = "data:text/html;charset=utf-8,";
+const WIDTH = 375;
+const HEIGHT = 450;
+const ZOOM_LEVELS = [0.3, 0.5, 0.9, 1, 1.5, 2, 2.4];
+
+addRDMTask(
+ null,
+ async function () {
+ const tab = await addTab(TEST_URL);
+ const browser = tab.linkedBrowser;
+
+ const { ui, manager } = await openRDM(tab);
+ await waitForDeviceAndViewportState(ui);
+ await setViewportSize(ui, manager, WIDTH, HEIGHT);
+
+ info("Ensure outer size values are unchanged at different zoom levels.");
+ for (let i = 0; i < ZOOM_LEVELS.length; i++) {
+ info(`Setting zoom level to ${ZOOM_LEVELS[i]}`);
+ await promiseRDMZoom(ui, browser, ZOOM_LEVELS[i]);
+
+ await checkWindowOuterSize(ui, ZOOM_LEVELS[i]);
+ await checkWindowScreenSize(ui, ZOOM_LEVELS[i]);
+ }
+ },
+ { onlyPrefAndTask: true }
+);
+
+async function checkWindowOuterSize(ui, zoom_level) {
+ return SpecialPowers.spawn(
+ ui.getViewportBrowser(),
+ [{ width: WIDTH, height: HEIGHT, zoom: zoom_level }],
+ async function ({ width, height, zoom }) {
+ // Approximate the outer size value returned on the window content with the expected
+ // value. We should expect, at the very most, a 2px difference between the two due
+ // to floating point rounding errors that occur when scaling from inner size CSS
+ // integer values to outer size CSS integer values. See Part 1 of Bug 1107456.
+ // Some of the drift is also due to full zoom scaling effects; see Bug 1577775.
+ ok(
+ Math.abs(content.outerWidth - width) <= 2,
+ `window.outerWidth zoom ${zoom} should be ${width} and we got ${content.outerWidth}.`
+ );
+ ok(
+ Math.abs(content.outerHeight - height) <= 2,
+ `window.outerHeight zoom ${zoom} should be ${height} and we got ${content.outerHeight}.`
+ );
+ }
+ );
+}
+
+async function checkWindowScreenSize(ui, zoom_level) {
+ return SpecialPowers.spawn(
+ ui.getViewportBrowser(),
+ [{ width: WIDTH, height: HEIGHT, zoom: zoom_level }],
+ async function ({ width, height, zoom }) {
+ const { screen } = content;
+
+ ok(
+ Math.abs(screen.availWidth - width) <= 2,
+ `screen.availWidth zoom ${zoom} should be ${width} and we got ${screen.availWidth}.`
+ );
+
+ ok(
+ Math.abs(screen.availHeight - height) <= 2,
+ `screen.availHeight zoom ${zoom} should be ${height} and we got ${screen.availHeight}.`
+ );
+
+ ok(
+ Math.abs(screen.width - width) <= 2,
+ `screen.width zoom " ${zoom} should be ${width} and we got ${screen.width}.`
+ );
+
+ ok(
+ Math.abs(screen.height - height) <= 2,
+ `screen.height zoom " ${zoom} should be ${height} and we got ${screen.height}.`
+ );
+ }
+ );
+}