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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
| commit | 43a97878ce14b72f0981164f87f2e35e14151312 (patch) | |
| tree | 620249daf56c0258faa40cbdcf9cfba06de2a846 /dom/base/test/unit/test_blockParsing.js | |
| parent | Initial commit. (diff) | |
| download | firefox-upstream.tar.xz firefox-upstream.zip | |
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
| -rw-r--r-- | dom/base/test/unit/test_blockParsing.js | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/dom/base/test/unit/test_blockParsing.js b/dom/base/test/unit/test_blockParsing.js new file mode 100644 index 0000000000..cdc4f852e1 --- /dev/null +++ b/dom/base/test/unit/test_blockParsing.js @@ -0,0 +1,113 @@ +"use strict"; + +const { TestUtils } = ChromeUtils.importESModule( + "resource://testing-common/TestUtils.sys.mjs" +); +const { XPCShellContentUtils } = ChromeUtils.importESModule( + "resource://testing-common/XPCShellContentUtils.sys.mjs" +); +const { setTimeout } = ChromeUtils.importESModule( + "resource://gre/modules/Timer.sys.mjs" +); + +XPCShellContentUtils.init(this); + +function delay() { + return new Promise(resolve => { + setTimeout(resolve, 0); + }); +} + +const server = XPCShellContentUtils.createHttpServer({ + hosts: ["example.com"], +}); + +// XML document with only a <script> tag as the document element. +const PAGE_URL = "http://example.com/"; +server.registerPathHandler("/", (request, response) => { + response.setHeader("Content-Type", "application/xhtml+xml"); + response.write(String.raw`<!DOCTYPE html> + <script xmlns="http://www.w3.org/1999/xhtml" src="slow.js"/> + `); +}); + +let resolveResumeScriptPromise; +let resumeScriptPromise = new Promise(resolve => { + resolveResumeScriptPromise = resolve; +}); + +let resolveScriptRequestPromise; +let scriptRequestPromise = new Promise(resolve => { + resolveScriptRequestPromise = resolve; +}); + +// An empty script which waits to complete until `resumeScriptPromise` +// resolves. +server.registerPathHandler("/slow.js", async (request, response) => { + response.processAsync(); + resolveScriptRequestPromise(); + + await resumeScriptPromise; + + response.setHeader("Content-type", "text/javascript"); + response.write(""); + response.finish(); +}); + +// Tests that attempting to block parsing for a <script> tag while the +// parser is already blocked is handled correctly, and does not cause +// crashes or hangs. +add_task(async function test_nested_blockParser() { + // Wait for the document element of the page to be inserted, and block + // the parser when it is. + let resolveBlockerPromise; + let blockerPromise; + let docElementPromise = TestUtils.topicObserved( + "document-element-inserted", + doc => { + if (doc.location.href === PAGE_URL) { + blockerPromise = new Promise(resolve => { + resolveBlockerPromise = resolve; + }); + + doc.blockParsing(blockerPromise); + return true; + } + return false; + } + ); + + // Begin loading the page. + let pagePromise = XPCShellContentUtils.loadContentPage(PAGE_URL, { + remote: false, + }); + + // Wait for the document element to be inserted. + await docElementPromise; + // Wait for the /slow.js script request to initiate. + await scriptRequestPromise; + + // Make some trips through the event loop to be safe. + await delay(); + await delay(); + + // Allow the /slow.js script request to complete. + resolveResumeScriptPromise(); + + // Make some trips through the event loop so that the <script> request + // unblocks the parser. + await delay(); + await delay(); + + // Release the parser blocker added in the observer above. + resolveBlockerPromise(); + + // Make some trips through the event loop to allow the parser to + // unblock. + await delay(); + await delay(); + + // Wait for the document to finish loading, and then close it. + let page = await pagePromise; + await page.close(); +}); |