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Diffstat (limited to 'accessible/tests/browser/shared-head.js')
| -rw-r--r-- | accessible/tests/browser/shared-head.js | 916 |
1 files changed, 916 insertions, 0 deletions
diff --git a/accessible/tests/browser/shared-head.js b/accessible/tests/browser/shared-head.js new file mode 100644 index 0000000000..3f5d3082cf --- /dev/null +++ b/accessible/tests/browser/shared-head.js @@ -0,0 +1,916 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +"use strict"; + +/* import-globals-from ../mochitest/common.js */ +/* import-globals-from ../mochitest/layout.js */ +/* import-globals-from ../mochitest/promisified-events.js */ + +/* exported Logger, MOCHITESTS_DIR, isCacheEnabled, isWinNoCache, invokeSetAttribute, invokeFocus, + invokeSetStyle, getAccessibleDOMNodeID, getAccessibleTagName, + addAccessibleTask, findAccessibleChildByID, isDefunct, + CURRENT_CONTENT_DIR, loadScripts, loadContentScripts, snippetToURL, + Cc, Cu, arrayFromChildren, forceGC, contentSpawnMutation, + DEFAULT_IFRAME_ID, DEFAULT_IFRAME_DOC_BODY_ID, invokeContentTask, + matchContentDoc, currentContentDoc, getContentDPR, + waitForImageMap, getContentBoundsForDOMElm, untilCacheIs, untilCacheOk, testBoundsWithContent, waitForContentPaint */ + +const CURRENT_FILE_DIR = "/browser/accessible/tests/browser/"; + +/** + * Current browser test directory path used to load subscripts. + */ +const CURRENT_DIR = `chrome://mochitests/content${CURRENT_FILE_DIR}`; +/** + * A11y mochitest directory where we find common files used in both browser and + * plain tests. + */ +const MOCHITESTS_DIR = + "chrome://mochitests/content/a11y/accessible/tests/mochitest/"; +/** + * A base URL for test files used in content. + */ +// eslint-disable-next-line @microsoft/sdl/no-insecure-url +const CURRENT_CONTENT_DIR = `http://example.com${CURRENT_FILE_DIR}`; + +const LOADED_CONTENT_SCRIPTS = new Map(); + +const DEFAULT_CONTENT_DOC_BODY_ID = "body"; +const DEFAULT_IFRAME_ID = "default-iframe-id"; +const DEFAULT_IFRAME_DOC_BODY_ID = "default-iframe-body-id"; + +const HTML_MIME_TYPE = "text/html"; +const XHTML_MIME_TYPE = "application/xhtml+xml"; + +const isCacheEnabled = Services.prefs.getBoolPref( + "accessibility.cache.enabled", + false +); + +// Some RemoteAccessible methods aren't supported on Windows when the cache is +// disabled. +const isWinNoCache = !isCacheEnabled && AppConstants.platform == "win"; + +function loadHTMLFromFile(path) { + // Load the HTML to return in the response from file. + // Since it's relative to the cwd of the test runner, we start there and + // append to get to the actual path of the file. + const testHTMLFile = Services.dirsvc.get("CurWorkD", Ci.nsIFile); + const dirs = path.split("/"); + for (let i = 0; i < dirs.length; i++) { + testHTMLFile.append(dirs[i]); + } + + const testHTMLFileStream = Cc[ + "@mozilla.org/network/file-input-stream;1" + ].createInstance(Ci.nsIFileInputStream); + testHTMLFileStream.init(testHTMLFile, -1, 0, 0); + const testHTML = NetUtil.readInputStreamToString( + testHTMLFileStream, + testHTMLFileStream.available() + ); + + return testHTML; +} + +let gIsIframe = false; +let gIsRemoteIframe = false; + +function currentContentDoc() { + return gIsIframe ? DEFAULT_IFRAME_DOC_BODY_ID : DEFAULT_CONTENT_DOC_BODY_ID; +} + +/** + * Accessible event match criteria based on the id of the current document + * accessible in test. + * + * @param {nsIAccessibleEvent} event + * Accessible event to be tested for a match. + * + * @return {Boolean} + * True if accessible event's accessible object ID matches current + * document accessible ID. + */ +function matchContentDoc(event) { + return getAccessibleDOMNodeID(event.accessible) === currentContentDoc(); +} + +/** + * Used to dump debug information. + */ +let Logger = { + /** + * Set up this variable to dump log messages into console. + */ + dumpToConsole: false, + + /** + * Set up this variable to dump log messages into error console. + */ + dumpToAppConsole: false, + + /** + * Return true if dump is enabled. + */ + get enabled() { + return this.dumpToConsole || this.dumpToAppConsole; + }, + + /** + * Dump information into console if applicable. + */ + log(msg) { + if (this.enabled) { + this.logToConsole(msg); + this.logToAppConsole(msg); + } + }, + + /** + * Log message to console. + */ + logToConsole(msg) { + if (this.dumpToConsole) { + dump(`\n${msg}\n`); + } + }, + + /** + * Log message to error console. + */ + logToAppConsole(msg) { + if (this.dumpToAppConsole) { + Services.console.logStringMessage(`${msg}`); + } + }, +}; + +/** + * Asynchronously set or remove content element's attribute (in content process + * if e10s is enabled). + * @param {Object} browser current "tabbrowser" element + * @param {String} id content element id + * @param {String} attr attribute name + * @param {String?} value optional attribute value, if not present, remove + * attribute + * @return {Promise} promise indicating that attribute is set/removed + */ +function invokeSetAttribute(browser, id, attr, value) { + if (value) { + Logger.log(`Setting ${attr} attribute to ${value} for node with id: ${id}`); + } else { + Logger.log(`Removing ${attr} attribute from node with id: ${id}`); + } + + return invokeContentTask( + browser, + [id, attr, value], + (contentId, contentAttr, contentValue) => { + let elm = content.document.getElementById(contentId); + if (contentValue) { + elm.setAttribute(contentAttr, contentValue); + } else { + elm.removeAttribute(contentAttr); + } + } + ); +} + +/** + * Asynchronously set or remove content element's style (in content process if + * e10s is enabled, or in fission process if fission is enabled and a fission + * frame is present). + * @param {Object} browser current "tabbrowser" element + * @param {String} id content element id + * @param {String} aStyle style property name + * @param {String?} aValue optional style property value, if not present, + * remove style + * @return {Promise} promise indicating that style is set/removed + */ +function invokeSetStyle(browser, id, style, value) { + if (value) { + Logger.log(`Setting ${style} style to ${value} for node with id: ${id}`); + } else { + Logger.log(`Removing ${style} style from node with id: ${id}`); + } + + return invokeContentTask( + browser, + [id, style, value], + (contentId, contentStyle, contentValue) => { + const elm = content.document.getElementById(contentId); + if (contentValue) { + elm.style[contentStyle] = contentValue; + } else { + delete elm.style[contentStyle]; + } + } + ); +} + +/** + * Asynchronously set focus on a content element (in content process if e10s is + * enabled, or in fission process if fission is enabled and a fission frame is + * present). + * @param {Object} browser current "tabbrowser" element + * @param {String} id content element id + * @return {Promise} promise indicating that focus is set + */ +function invokeFocus(browser, id) { + Logger.log(`Setting focus on a node with id: ${id}`); + + return invokeContentTask(browser, [id], contentId => { + const elm = content.document.getElementById(contentId); + if (elm.editor) { + elm.selectionStart = elm.selectionEnd = elm.value.length; + } + + elm.focus(); + }); +} + +/** + * Get DPR for a specific content window. + * @param browser + * Browser for which we want its content window's DPR reported. + * + * @return {Promise} + * Promise with the value that resolves to the devicePixelRatio of the + * content window of a given browser. + * + */ +function getContentDPR(browser) { + return invokeContentTask(browser, [], () => content.window.devicePixelRatio); +} + +/** + * Asynchronously perform a task in content (in content process if e10s is + * enabled, or in fission process if fission is enabled and a fission frame is + * present). + * @param {Object} browser current "tabbrowser" element + * @param {Array} args arguments for the content task + * @param {Function} task content task function + * + * @return {Promise} promise indicating that content task is complete + */ +function invokeContentTask(browser, args, task) { + return SpecialPowers.spawn( + browser, + [DEFAULT_IFRAME_ID, task.toString(), ...args], + (iframeId, contentTask, ...contentArgs) => { + // eslint-disable-next-line no-eval + const runnableTask = eval(` + (() => { + return (${contentTask}); + })();`); + const frame = content.document.getElementById(iframeId); + + return frame + ? SpecialPowers.spawn(frame, contentArgs, runnableTask) + : runnableTask.call(this, ...contentArgs); + } + ); +} + +/** + * Compare process ID's between the top level content process and possible + * remote/local iframe proccess. + * @param {Object} browser + * Top level browser object for a tab. + * @param {Boolean} isRemote + * Indicates if we expect the iframe content process to be remote or not. + */ +async function comparePIDs(browser, isRemote) { + function getProcessID() { + return Services.appinfo.processID; + } + + const contentPID = await SpecialPowers.spawn(browser, [], getProcessID); + const iframePID = await invokeContentTask(browser, [], getProcessID); + is( + isRemote, + contentPID !== iframePID, + isRemote + ? "Remote IFRAME is in a different process." + : "IFRAME is in the same process." + ); +} + +/** + * Load a list of scripts into the test + * @param {Array} scripts a list of scripts to load + */ +function loadScripts(...scripts) { + for (let script of scripts) { + let path = + typeof script === "string" + ? `${CURRENT_DIR}${script}` + : `${script.dir}${script.name}`; + Services.scriptloader.loadSubScript(path, this); + } +} + +/** + * Load a list of scripts into target's content. + * @param {Object} target + * target for loading scripts into + * @param {Array} scripts + * a list of scripts to load into content + */ +async function loadContentScripts(target, ...scripts) { + for (let { script, symbol } of scripts) { + let contentScript = `${CURRENT_DIR}${script}`; + let loadedScriptSet = LOADED_CONTENT_SCRIPTS.get(contentScript); + if (!loadedScriptSet) { + loadedScriptSet = new WeakSet(); + LOADED_CONTENT_SCRIPTS.set(contentScript, loadedScriptSet); + } else if (loadedScriptSet.has(target)) { + continue; + } + + await SpecialPowers.spawn( + target, + [contentScript, symbol], + async (_contentScript, importSymbol) => { + let module = ChromeUtils.importESModule(_contentScript); + content.window[importSymbol] = module[importSymbol]; + } + ); + loadedScriptSet.add(target); + } +} + +function attrsToString(attrs) { + return Object.entries(attrs) + .map(([attr, value]) => `${attr}=${JSON.stringify(value)}`) + .join(" "); +} + +function wrapWithIFrame(doc, options = {}) { + let src; + let { iframeAttrs = {}, iframeDocBodyAttrs = {} } = options; + iframeDocBodyAttrs = { + id: DEFAULT_IFRAME_DOC_BODY_ID, + ...iframeDocBodyAttrs, + }; + if (options.remoteIframe) { + // eslint-disable-next-line @microsoft/sdl/no-insecure-url + const srcURL = new URL(`http://example.net/document-builder.sjs`); + if (doc.endsWith("html")) { + srcURL.searchParams.append("file", `${CURRENT_FILE_DIR}${doc}`); + } else { + srcURL.searchParams.append( + "html", + `<!doctype html> + <html> + <head> + <meta charset="utf-8"/> + <title>Accessibility Fission Test</title> + </head> + <body ${attrsToString(iframeDocBodyAttrs)}>${doc}</body> + </html>` + ); + } + src = srcURL.href; + } else { + const mimeType = doc.endsWith("xhtml") ? XHTML_MIME_TYPE : HTML_MIME_TYPE; + if (doc.endsWith("html")) { + doc = loadHTMLFromFile(`${CURRENT_FILE_DIR}${doc}`); + doc = doc.replace( + /<body[.\s\S]*?>/, + `<body ${attrsToString(iframeDocBodyAttrs)}>` + ); + } else { + doc = `<!doctype html> + <body ${attrsToString(iframeDocBodyAttrs)}>${doc}</body>`; + } + + src = `data:${mimeType};charset=utf-8,${encodeURIComponent(doc)}`; + } + + iframeAttrs = { + id: DEFAULT_IFRAME_ID, + src, + ...iframeAttrs, + }; + + return `<iframe ${attrsToString(iframeAttrs)}/>`; +} + +/** + * Takes an HTML snippet or HTML doc url and returns an encoded URI for a full + * document with the snippet or the URL as a source for the IFRAME. + * @param {String} doc + * a markup snippet or url. + * @param {Object} options (see options in addAccessibleTask). + * + * @return {String} + * a base64 encoded data url of the document container the snippet. + **/ +function snippetToURL(doc, options = {}) { + const { contentDocBodyAttrs = {} } = options; + const attrs = { + id: DEFAULT_CONTENT_DOC_BODY_ID, + ...contentDocBodyAttrs, + }; + + if (gIsIframe) { + doc = wrapWithIFrame(doc, options); + } + + const encodedDoc = encodeURIComponent( + `<!doctype html> + <html> + <head> + <meta charset="utf-8"/> + <title>Accessibility Test</title> + </head> + <body ${attrsToString(attrs)}>${doc}</body> + </html>` + ); + + return `data:text/html;charset=utf-8,${encodedDoc}`; +} + +function accessibleTask(doc, task, options = {}) { + return async function() { + gIsRemoteIframe = options.remoteIframe; + gIsIframe = options.iframe || gIsRemoteIframe; + let url; + if (options.chrome && doc.endsWith("html")) { + // Load with a chrome:// URL so this loads as a chrome document in the + // parent process. + url = `${CURRENT_DIR}${doc}`; + } else if (doc.endsWith("html") && !gIsIframe) { + url = `${CURRENT_CONTENT_DIR}${doc}`; + } else { + url = snippetToURL(doc, options); + } + + registerCleanupFunction(() => { + for (let observer of Services.obs.enumerateObservers( + "accessible-event" + )) { + Services.obs.removeObserver(observer, "accessible-event"); + } + }); + + let onContentDocLoad; + if (!options.chrome) { + onContentDocLoad = waitForEvent( + EVENT_DOCUMENT_LOAD_COMPLETE, + DEFAULT_CONTENT_DOC_BODY_ID + ); + } + + let onIframeDocLoad; + if (options.remoteIframe && !options.skipFissionDocLoad) { + onIframeDocLoad = waitForEvent( + EVENT_DOCUMENT_LOAD_COMPLETE, + DEFAULT_IFRAME_DOC_BODY_ID + ); + } + + await BrowserTestUtils.withNewTab( + { + gBrowser, + // For chrome, we need a non-remote browser. + opening: !options.chrome + ? url + : () => { + // Passing forceNotRemote: true still sets maychangeremoteness, + // which will cause data: URIs to load remotely. There's no way to + // avoid this with gBrowser or BrowserTestUtils. Therefore, we + // load a blank document initially and replace it below. + gBrowser.selectedTab = BrowserTestUtils.addTab( + gBrowser, + "about:blank", + { + forceNotRemote: true, + } + ); + }, + }, + async function(browser) { + registerCleanupFunction(() => { + if (browser) { + let tab = gBrowser.getTabForBrowser(browser); + if (tab && !tab.closing && tab.linkedBrowser) { + gBrowser.removeTab(tab); + } + } + }); + + if (options.chrome) { + await SpecialPowers.pushPrefEnv({ + set: [["security.allow_unsafe_parent_loads", true]], + }); + // Ensure this never becomes a remote browser. + browser.removeAttribute("maychangeremoteness"); + // Now we can load our page without it becoming remote. + browser.setAttribute("src", url); + } + + await SimpleTest.promiseFocus(browser); + + if (options.chrome) { + ok(!browser.isRemoteBrowser, "Not remote browser"); + } else if (Services.appinfo.browserTabsRemoteAutostart) { + ok(browser.isRemoteBrowser, "Actually remote browser"); + } + + let docAccessible; + if (options.chrome) { + // Chrome documents don't fire DOCUMENT_LOAD_COMPLETE. Instead, wait + // until we can get the DocAccessible and it doesn't have the busy + // state. + await BrowserTestUtils.waitForCondition(() => { + docAccessible = getAccessible(browser.contentWindow.document); + if (!docAccessible) { + return false; + } + const state = {}; + docAccessible.getState(state, {}); + return !(state.value & STATE_BUSY); + }); + } else { + ({ accessible: docAccessible } = await onContentDocLoad); + } + let iframeDocAccessible; + if (gIsIframe) { + if (!options.skipFissionDocLoad) { + await comparePIDs(browser, options.remoteIframe); + iframeDocAccessible = onIframeDocLoad + ? (await onIframeDocLoad).accessible + : findAccessibleChildByID(docAccessible, DEFAULT_IFRAME_ID) + .firstChild; + } + } + + await loadContentScripts(browser, { + script: "Common.sys.mjs", + symbol: "CommonUtils", + }); + + await task( + browser, + iframeDocAccessible || docAccessible, + iframeDocAccessible && docAccessible + ); + } + ); + }; +} + +/** + * A wrapper around browser test add_task that triggers an accessible test task + * as a new browser test task with given document, data URL or markup snippet. + * @param {String} doc + * URL (relative to current directory) or data URL or markup snippet + * that is used to test content with + * @param {Function|AsyncFunction} task + * a generator or a function with tests to run + * @param {null|Object} options + * Options for running accessibility test tasks: + * - {Boolean} topLevel + * Flag to run the test with content in the top level content process. + * Default is true. + * - {Boolean} chrome + * Flag to run the test with content as a chrome document in the + * parent process. Default is false. Although url can be a markup + * snippet, a snippet cannot be used for XUL content. To load XUL, + * specify a relative URL to a XUL document. In that case, toplevel + * should usually be set to false, since XUL documents don't work in + * content processes. + * - {Boolean} iframe + * Flag to run the test with content wrapped in an iframe. Default is + * false. + * - {Boolean} remoteIframe + * Flag to run the test with content wrapped in a remote iframe. + * Default is false. + * - {Object} iframeAttrs + * A map of attribute/value pairs to be applied to IFRAME element. + * - {Boolean} skipFissionDocLoad + * If true, the test will not wait for iframe document document + * loaded event (useful for when IFRAME is initially hidden). + * - {Object} contentDocBodyAttrs + * a set of attributes to be applied to a top level content document + * body + * - {Object} iframeDocBodyAttrs + * a set of attributes to be applied to a iframe content document body + */ +function addAccessibleTask(doc, task, options = {}) { + const { + topLevel = true, + chrome = false, + iframe = false, + remoteIframe = false, + } = options; + if (topLevel) { + add_task( + accessibleTask(doc, task, { + ...options, + chrome: false, + iframe: false, + remoteIframe: false, + }) + ); + } + + if (chrome) { + add_task( + accessibleTask(doc, task, { + ...options, + topLevel: false, + iframe: false, + remoteIframe: false, + }) + ); + } + + if (iframe) { + add_task( + accessibleTask(doc, task, { + ...options, + topLevel: false, + chrome: false, + remoteIframe: false, + }) + ); + } + + if (gFissionBrowser && remoteIframe) { + add_task( + accessibleTask(doc, task, { + ...options, + topLevel: false, + chrome: false, + iframe: false, + }) + ); + } +} + +/** + * Check if an accessible object has a defunct test. + * @param {nsIAccessible} accessible object to test defunct state for + * @return {Boolean} flag indicating defunct state + */ +function isDefunct(accessible) { + let defunct = false; + try { + let extState = {}; + accessible.getState({}, extState); + defunct = extState.value & Ci.nsIAccessibleStates.EXT_STATE_DEFUNCT; + } catch (x) { + defunct = true; + } finally { + if (defunct) { + Logger.log(`Defunct accessible: ${prettyName(accessible)}`); + } + } + return defunct; +} + +/** + * Get the DOM tag name for a given accessible. + * @param {nsIAccessible} accessible accessible + * @return {String?} tag name of associated DOM node, or null. + */ +function getAccessibleTagName(acc) { + try { + return acc.attributes.getStringProperty("tag"); + } catch (e) { + return null; + } +} + +/** + * Traverses the accessible tree starting from a given accessible as a root and + * looks for an accessible that matches based on its DOMNode id. + * @param {nsIAccessible} accessible root accessible + * @param {String} id id to look up accessible for + * @param {Array?} interfaces the interface or an array interfaces + * to query it/them from obtained accessible + * @return {nsIAccessible?} found accessible if any + */ +function findAccessibleChildByID(accessible, id, interfaces) { + if (getAccessibleDOMNodeID(accessible) === id) { + return queryInterfaces(accessible, interfaces); + } + for (let i = 0; i < accessible.children.length; ++i) { + let found = findAccessibleChildByID(accessible.getChildAt(i), id); + if (found) { + return queryInterfaces(found, interfaces); + } + } + return null; +} + +function queryInterfaces(accessible, interfaces) { + if (!interfaces) { + return accessible; + } + + for (let iface of interfaces.filter(i => !(accessible instanceof i))) { + try { + accessible.QueryInterface(iface); + } catch (e) { + ok(false, "Can't query " + iface); + } + } + + return accessible; +} + +function arrayFromChildren(accessible) { + return Array.from({ length: accessible.childCount }, (c, i) => + accessible.getChildAt(i) + ); +} + +/** + * Force garbage collection. + */ +function forceGC() { + SpecialPowers.gc(); + SpecialPowers.forceShrinkingGC(); + SpecialPowers.forceCC(); + SpecialPowers.gc(); + SpecialPowers.forceShrinkingGC(); + SpecialPowers.forceCC(); +} + +/* + * This function spawns a content task and awaits expected mutation events from + * various content changes. It's good at catching events we did *not* expect. We + * do this advancing the layout refresh to flush the relocations/insertions + * queue. + */ +async function contentSpawnMutation(browser, waitFor, func, args = []) { + let onReorders = waitForEvents({ expected: waitFor.expected || [] }); + let unexpectedListener = new UnexpectedEvents(waitFor.unexpected || []); + + function tick() { + // 100ms is an arbitrary positive number to advance the clock. + // We don't need to advance the clock for a11y mutations, but other + // tick listeners may depend on an advancing clock with each refresh. + content.windowUtils.advanceTimeAndRefresh(100); + } + + // This stops the refreh driver from doing its regular ticks, and leaves + // us in control. + await invokeContentTask(browser, [], tick); + + // Perform the tree mutation. + await invokeContentTask(browser, args, func); + + // Do one tick to flush our queue (insertions, relocations, etc.) + await invokeContentTask(browser, [], tick); + + let events = await onReorders; + + unexpectedListener.stop(); + + // Go back to normal refresh driver ticks. + await invokeContentTask(browser, [], function() { + content.windowUtils.restoreNormalRefresh(); + }); + + return events; +} + +async function waitForImageMap(browser, accDoc, id = "imgmap") { + let acc = findAccessibleChildByID(accDoc, id); + + if (!acc) { + const onShow = waitForEvent(EVENT_SHOW, id); + acc = (await onShow).accessible; + } + + if (acc.firstChild) { + return; + } + + const onReorder = waitForEvent(EVENT_REORDER, id); + // Wave over image map + await invokeContentTask(browser, [id], contentId => { + const { ContentTaskUtils } = ChromeUtils.importESModule( + "resource://testing-common/ContentTaskUtils.sys.mjs" + ); + const EventUtils = ContentTaskUtils.getEventUtils(content); + EventUtils.synthesizeMouse( + content.document.getElementById(contentId), + 10, + 10, + { type: "mousemove" }, + content + ); + }); + await onReorder; +} + +async function getContentBoundsForDOMElm(browser, id) { + return invokeContentTask(browser, [id], contentId => { + const { Layout: LayoutUtils } = ChromeUtils.importESModule( + "chrome://mochitests/content/browser/accessible/tests/browser/Layout.sys.mjs" + ); + + return LayoutUtils.getBoundsForDOMElm(contentId, content.document); + }); +} + +const CACHE_WAIT_TIMEOUT_MS = 5000; + +/** + * Wait for a predicate to be true after cache ticks. + * This function takes two callbacks, the condition is evaluated + * by calling the first callback with the arguments returned by the second. + * This allows us to asynchronously return the arguments as a result if the condition + * of the first callback is met, or if it times out. The returned arguments can then + * be used to record a pass or fail in the test. + */ +function untilCacheCondition(conditionFunc, argsFunc) { + return new Promise((resolve, reject) => { + let args = argsFunc(); + if (conditionFunc(...args)) { + resolve(args); + return; + } + + let cacheObserver = { + observe(subject) { + args = argsFunc(); + if (conditionFunc(...args)) { + clearTimeout(this.timer); + Services.obs.removeObserver(this, "accessible-cache"); + resolve(args); + } + }, + + timeout() { + Services.obs.removeObserver(this, "accessible-cache"); + args = argsFunc(); + resolve(args); + }, + }; + + cacheObserver.timer = setTimeout( + cacheObserver.timeout.bind(cacheObserver), + CACHE_WAIT_TIMEOUT_MS + ); + Services.obs.addObserver(cacheObserver, "accessible-cache"); + }); +} + +function untilCacheOk(conditionFunc, message) { + return untilCacheCondition( + (v, _unusedMessage) => v, + () => [conditionFunc(), message] + ).then(([v, msg]) => ok(v, msg)); +} + +function untilCacheIs(retrievalFunc, expected, message) { + return untilCacheCondition( + (a, b, _unusedMessage) => Object.is(a, b), + () => [retrievalFunc(), expected, message] + ).then(([got, exp, msg]) => is(got, exp, msg)); +} + +async function waitForContentPaint(browser) { + await SpecialPowers.spawn(browser, [], () => { + return new Promise(function(r) { + content.requestAnimationFrame(() => content.setTimeout(r)); + }); + }); +} + +async function testBoundsWithContent(iframeDocAcc, id, browser) { + // Retrieve layout bounds from content + let expectedBounds = await invokeContentTask(browser, [id], _id => { + const { Layout: LayoutUtils } = ChromeUtils.importESModule( + "chrome://mochitests/content/browser/accessible/tests/browser/Layout.sys.mjs" + ); + return LayoutUtils.getBoundsForDOMElm(_id, content.document); + }); + + // Returns true if both number arrays match within `FUZZ`. + function isWithinExpected(bounds) { + const FUZZ = 1; + return bounds + .map((val, i) => Math.abs(val - expectedBounds[i]) <= FUZZ) + .reduce((a, b) => a && b, true); + } + + const acc = findAccessibleChildByID(iframeDocAcc, id); + let [accBounds] = await untilCacheCondition(isWithinExpected, () => [ + getBounds(acc), + ]); + + ok( + isWithinExpected(accBounds), + `${accBounds} fuzzily matches expected ${expectedBounds}` + ); +} |