1 files changed, 102 insertions, 0 deletions
diff --git a/dom/webgpu/tests/cts/checkout/src/common/tools/crawl.ts b/dom/webgpu/tests/cts/checkout/src/common/tools/crawl.ts
new file mode 100644
index 0000000000..ae5cf41c2c
--- /dev/null
+++ b/dom/webgpu/tests/cts/checkout/src/common/tools/crawl.ts
@@ -0,0 +1,102 @@
+// Node can look at the filesystem, but JS in the browser can't.
+// This crawls the file tree under src/suites/${suite} to generate a (non-hierarchical) static
+// listing file that can then be used in the browser to load the modules containing the tests.
+
+import * as fs from 'fs';
+import * as path from 'path';
+
+import { SpecFile } from '../internal/file_loader.js';
+import { validQueryPart } from '../internal/query/validQueryPart.js';
+import { TestSuiteListingEntry, TestSuiteListing } from '../internal/test_suite_listing.js';
+import { assert, unreachable } from '../util/util.js';
+
+const specFileSuffix = __filename.endsWith('.ts') ? '.spec.ts' : '.spec.js';
+
+async function crawlFilesRecursively(dir: string): Promise<string[]> {
+  const subpathInfo = await Promise.all(
+    (await fs.promises.readdir(dir)).map(async d => {
+      const p = path.join(dir, d);
+      const stats = await fs.promises.stat(p);
+      return {
+        path: p,
+        isDirectory: stats.isDirectory(),
+        isFile: stats.isFile(),
+      };
+    })
+  );
+
+  const files = subpathInfo
+    .filter(
+      i =>
+        i.isFile &&
+        (i.path.endsWith(specFileSuffix) ||
+          i.path.endsWith(`${path.sep}README.txt`) ||
+          i.path === 'README.txt')
+    )
+    .map(i => i.path);
+
+  return files.concat(
+    await subpathInfo
+      .filter(i => i.isDirectory)
+      .map(i => crawlFilesRecursively(i.path))
+      .reduce(async (a, b) => (await a).concat(await b), Promise.resolve([]))
+  );
+}
+
+export async function crawl(
+  suiteDir: string,
+  validate: boolean = true
+): Promise<TestSuiteListingEntry[]> {
+  if (!fs.existsSync(suiteDir)) {
+    console.error(`Could not find ${suiteDir}`);
+    process.exit(1);
+  }
+
+  // Crawl files and convert paths to be POSIX-style, relative to suiteDir.
+  const filesToEnumerate = (await crawlFilesRecursively(suiteDir))
+    .map(f => path.relative(suiteDir, f).replace(/\\/g, '/'))
+    .sort();
+
+  const entries: TestSuiteListingEntry[] = [];
+  for (const file of filesToEnumerate) {
+    // |file| is the suite-relative file path.
+    if (file.endsWith(specFileSuffix)) {
+      const filepathWithoutExtension = file.substring(0, file.length - specFileSuffix.length);
+
+      const suite = path.basename(suiteDir);
+
+      if (validate) {
+        const filename = `../../${suite}/${filepathWithoutExtension}.spec.js`;
+
+        assert(!process.env.STANDALONE_DEV_SERVER);
+        const mod = (await import(filename)) as SpecFile;
+        assert(mod.description !== undefined, 'Test spec file missing description: ' + filename);
+        assert(mod.g !== undefined, 'Test spec file missing TestGroup definition: ' + filename);
+
+        mod.g.validate();
+      }
+
+      const pathSegments = filepathWithoutExtension.split('/');
+      for (const p of pathSegments) {
+        assert(validQueryPart.test(p), `Invalid directory name ${p}; must match ${validQueryPart}`);
+      }
+      entries.push({ file: pathSegments });
+    } else if (path.basename(file) === 'README.txt') {
+      const dirname = path.dirname(file);
+      const readme = fs.readFileSync(path.join(suiteDir, file), 'utf8').trim();
+
+      const pathSegments = dirname !== '.' ? dirname.split('/') : [];
+      entries.push({ file: pathSegments, readme });
+    } else {
+      unreachable(`Matched an unrecognized filename ${file}`);
+    }
+  }
+
+  return entries;
+}
+
+export function makeListing(filename: string): Promise<TestSuiteListing> {
+  // Don't validate. This path is only used for the dev server and running tests with Node.
+  // Validation is done for listing generation and presubmit.
+  return crawl(path.dirname(filename), false);
+}