chore: import upstream snapshot with attribution

2026-07-13 12:30:05 +08:00
commit 51d876a392
274 changed files with 121542 additions and 0 deletions
@@ -0,0 +1,47 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import assert from 'node:assert';
+import {describe, it} from 'node:test';
+
+import {
+  getTraceSummary,
+  parseRawTraceBuffer,
+} from '../../src/trace-processing/parse.js';
+
+import {loadTraceAsBuffer} from './fixtures/load.js';
+
+describe('Trace parsing', async () => {
+  it('can parse a Uint8Array from Tracing.stop())', async () => {
+    const rawData = loadTraceAsBuffer('basic-trace.json.gz');
+    const result = await parseRawTraceBuffer(rawData);
+    if ('error' in result) {
+      assert.fail(`Unexpected parse failure: ${result.error}`);
+    }
+    assert.ok(result?.parsedTrace);
+    assert.ok(result?.insights);
+  });
+
+  it('can format results of a trace', async t => {
+    const rawData = loadTraceAsBuffer('web-dev-with-commit.json.gz');
+    const result = await parseRawTraceBuffer(rawData);
+    if ('error' in result) {
+      assert.fail(`Unexpected parse failure: ${result.error}`);
+    }
+    assert.ok(result?.parsedTrace);
+    assert.ok(result?.insights);
+
+    const output = getTraceSummary(result);
+    t.assert.snapshot(output);
+  });
+
+  it('will return a message if there is an error', async () => {
+    const result = await parseRawTraceBuffer(undefined);
+    assert.deepEqual(result, {
+      error: 'No buffer was provided.',
+    });
+  });
+});