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Introduce integration tests for the presentation mode functionality

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This commit provides coverage for the happy flows of basic operations
like entering/exiting and changing pages.
This commit is contained in:
Tim van der Meij 2026-05-17 16:12:52 +02:00
parent 00af75905f
commit 0d69cc4dcf
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1
test/integration/jasmine-boot.js
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@ -38,6 +38,7 @@ async function runTests(results) {
"freetext_editor_spec.mjs",
"highlight_editor_spec.mjs",
"ink_editor_spec.mjs",
"presentation_mode_spec.mjs",
"reorganize_pages_spec.mjs",
"scripting_spec.mjs",
"signature_editor_spec.mjs",

174
test/integration/presentation_mode_spec.mjs Normal file
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@ -0,0 +1,174 @@
/* Copyright 2026 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import {
awaitPromise,
closePages,
createPromise,
loadAndWait,
waitForTimeout,
} from "./test_utils.mjs";
async function enterPresentationMode(page) {
await page.click("#secondaryToolbarToggleButton");
await page.waitForSelector("#secondaryToolbar", { hidden: false });
const handlePresentationModeChanged = await createPromise(page, resolve => {
window.PDFViewerApplication.eventBus.on(
"presentationmodechanged",
resolve,
{ once: true }
);
});
await page.click("#presentationMode");
await awaitPromise(handlePresentationModeChanged);
// Check that presentation mode is active and that the toolbar is
// invisible; the latter differentiates between proper presentation
// mode and pressing F11 to only hide the browser's UI elements.
await page.waitForFunction(`document.fullscreenElement !== null`);
await page.waitForSelector("#viewerContainer.pdfPresentationMode", {
visible: true,
});
await page.waitForSelector("#toolbarContainer", { visible: false });
await page.waitForFunction(
`window.PDFViewerApplication.pdfViewer.currentPageNumber === 1`
);
await page.waitForFunction(
`window.PDFViewerApplication.pdfViewer.currentScaleValue === "page-fit"`
);
}
async function exitPresentationMode(page, browserName) {
// Note that in Chrome pressing Escape does not work to exit full screen mode
// in the Puppeteer scope, so there we exit full screen mode programmatically
// instead, which is equivalent to what happens if Escape is pressed.
const handlePresentationModeChanged = await createPromise(page, resolve => {
window.PDFViewerApplication.eventBus.on(
"presentationmodechanged",
resolve,
{ once: true }
);
});
await (browserName === "chrome"
? page.evaluate(() => document.exitFullscreen())
: page.keyboard.press("Escape"));
await awaitPromise(handlePresentationModeChanged);
// Check that presentation mode is not active anymore and the toolbar
// is visible again.
await page.waitForFunction(`document.fullscreenElement === null`);
await page.waitForSelector("#viewerContainer:not(.pdfPresentationMode)", {
visible: true,
});
await page.waitForSelector("#toolbarContainer", { visible: true });
await page.waitForFunction(
`window.PDFViewerApplication.pdfViewer.currentPageNumber === 1`
);
await page.waitForFunction(
`window.PDFViewerApplication.pdfViewer.currentScaleValue !== "page-fit"`
);
}
describe("PDFPresentationMode", () => {
describe("Changing pages", () => {
let pages;
beforeEach(async () => {
pages = await loadAndWait(
"basicapi.pdf",
".textLayer .endOfContent",
100
);
});
afterEach(async () => {
await closePages(pages);
});
it("must check that changing pages using arrow keys works in presentation mode", async () => {
await Promise.all(
pages.map(async ([browserName, page]) => {
await enterPresentationMode(page);
// Go to the next page.
await page.keyboard.press("ArrowDown");
await page.waitForFunction(
`window.PDFViewerApplication.pdfViewer.currentPageNumber === 2`
);
// Go to the previous page.
await page.keyboard.press("ArrowUp");
await page.waitForFunction(
`window.PDFViewerApplication.pdfViewer.currentPageNumber === 1`
);
await exitPresentationMode(page, browserName);
})
);
});
it("must check that changing pages using mouse wheel works in presentation mode", async () => {
await Promise.all(
pages.map(async ([browserName, page]) => {
await enterPresentationMode(page);
// Go to the next page.
await page.mouse.wheel({ deltaY: 100 });
await page.waitForFunction(
`window.PDFViewerApplication.pdfViewer.currentPageNumber === 2`
);
// Wait until the viewer accepts a new mouse scroll event; see
// `MOUSE_SCROLL_COOLDOWN_TIME` in `web/pdf_presentation_mode.js`.
// eslint-disable-next-line no-restricted-syntax
await waitForTimeout(50);
// Go to the previous page.
await page.mouse.wheel({ deltaY: -100 });
await page.waitForFunction(
`window.PDFViewerApplication.pdfViewer.currentPageNumber === 1`
);
await exitPresentationMode(page, browserName);
})
);
});
it("must check that changing pages using mouse click works in presentation mode", async () => {
await Promise.all(
pages.map(async ([browserName, page]) => {
await enterPresentationMode(page);
// Go to the next page.
await page.click(".page[data-page-number='1']");
await page.waitForFunction(
`window.PDFViewerApplication.pdfViewer.currentPageNumber === 2`
);
// Go to the previous page.
await page.keyboard.down("Shift");
await page.click(".page[data-page-number='2']");
await page.keyboard.up("Shift");
await page.waitForFunction(
`window.PDFViewerApplication.pdfViewer.currentPageNumber === 1`
);
await exitPresentationMode(page, browserName);
})
);
});
});
});