chromedevtools--chrome-devtools-mcp
Nikolay Vitkov
9211c6b52d
This refactors the code to extract the Id logic from the PageCollector and provide it in the heapsnapshot. We need to use an UID as we need the internal ClassKey to query the heapsnapshot, but that is a strange string (usually looking like `,ClassName`) which may get the LLM confused as we use comma separated output.
96 行
2.5 KiB
TypeScript
96 行
2.5 KiB
TypeScript
/**
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* @license
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* Copyright 2026 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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import assert from 'node:assert';
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import {describe, it} from 'node:test';
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import {HeapSnapshotFormatter} from '../../src/formatters/HeapSnapshotFormatter.js';
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import type {DevTools} from '../../src/third_party/index.js';
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import {stableIdSymbol} from '../../src/utils/id.js';
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describe('HeapSnapshotFormatter', () => {
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const mockAggregates: Record<
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string,
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DevTools.HeapSnapshotModel.HeapSnapshotModel.AggregatedInfo
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> = {
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ObjectA: {
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name: 'ObjectA',
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count: 10,
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self: 100,
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maxRet: 1000,
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distance: 1,
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idxs: [],
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[stableIdSymbol]: 1,
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} as unknown as DevTools.HeapSnapshotModel.HeapSnapshotModel.AggregatedInfo,
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ObjectB: {
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name: 'ObjectB',
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count: 5,
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self: 50,
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maxRet: 500,
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distance: 2,
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idxs: [],
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[stableIdSymbol]: 2,
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} as unknown as DevTools.HeapSnapshotModel.HeapSnapshotModel.AggregatedInfo,
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};
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describe('toString', () => {
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it('formats data as CSV and sorts by self size', t => {
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const formatter = new HeapSnapshotFormatter(mockAggregates);
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const result = formatter.toString();
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t.assert.snapshot?.(result);
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});
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});
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describe('toJSON', () => {
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it('returns structured data sorted by self size', () => {
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const formatter = new HeapSnapshotFormatter(mockAggregates);
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const result = formatter.toJSON();
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assert.deepStrictEqual(result, [
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{
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uid: 1,
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className: 'ObjectA',
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count: 10,
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selfSize: 100,
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retainedSize: 1000,
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},
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{
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uid: 2,
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className: 'ObjectB',
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count: 5,
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selfSize: 50,
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retainedSize: 500,
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},
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]);
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});
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});
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describe('sort', () => {
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it('sorts aggregates by self size descending', () => {
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const unsortedAggregates: Record<
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string,
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DevTools.HeapSnapshotModel.HeapSnapshotModel.AggregatedInfo
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> = {
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ObjectB: {
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name: 'ObjectB',
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self: 50,
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},
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ObjectA: {
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name: 'ObjectA',
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self: 100,
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},
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} as unknown as Record<
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string,
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DevTools.HeapSnapshotModel.HeapSnapshotModel.AggregatedInfo
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>;
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const result = HeapSnapshotFormatter.sort(unsortedAggregates);
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assert.strictEqual(result.length, 2);
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assert.strictEqual(result[0][0], 'ObjectA');
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assert.strictEqual(result[1][0], 'ObjectB');
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});
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});
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});
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