mirror of
https://github.com/ChromeDevTools/chrome-devtools-mcp.git
synced 2026-09-14 19:45:30 +08:00
Dominik Inführ
61e312f593
Replace separate minimum and maximum heap-size filters with range strings. Values can use byte counts or units, such as `1024-2048`, `1MB-2MB`, `-1MiB`, and `1GiB-`. A bare value such as `10M` is treated as a minimum. The range syntax is used by `query_heapsnapshot_objects` for retained and self sizes and by `get_heapsnapshot_edges` for retained sizes.
780 lines
22 KiB
TypeScript
780 lines
22 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 {existsSync} from 'node:fs';
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import {rm} from 'node:fs/promises';
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import {tmpdir} from 'node:os';
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import {join} from 'node:path';
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import {describe, it} from 'node:test';
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import {
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takeHeapSnapshot,
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getHeapSnapshotSummary,
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getHeapSnapshotDetails,
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getHeapSnapshotClassNodes,
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getHeapSnapshotRetainers,
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closeHeapSnapshot,
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getHeapSnapshotRetainingPaths,
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getHeapSnapshotEdges,
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getHeapSnapshotDominators,
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compareHeapSnapshots,
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getHeapSnapshotDuplicateStrings,
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getHeapSnapshotObjectDetails,
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queryHeapSnapshotObjects,
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} from '../../src/tools/memory.js';
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import {parseByteSizeRange} from '../../src/utils/bytes.js';
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import {stableIdSymbol} from '../../src/utils/id.js';
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import {resolveCanonicalPath} from '../../src/utils/files.js';
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import {withMcpContext} from '../utils.js';
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describe('memory', () => {
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describe('take_heapsnapshot', () => {
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it('with default options', async () => {
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await withMcpContext(async (response, context) => {
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const filePath = join(tmpdir(), 'test-screenshot.heapsnapshot');
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try {
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await takeHeapSnapshot.handler(
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{params: {filePath}, page: context.getSelectedMcpPage()},
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response,
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context,
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);
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const canonicalFilePath = await resolveCanonicalPath(filePath);
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assert.equal(
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response.responseLines.at(0),
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`Heap snapshot saved to ${canonicalFilePath}`,
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);
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assert.ok(existsSync(filePath));
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} finally {
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await rm(filePath, {force: true});
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}
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});
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});
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});
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describe('get_heapsnapshot_summary', () => {
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it('with default options', async t => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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assert.ok(existsSync(filePath), `Fixture not found at ${filePath}`);
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await getHeapSnapshotSummary.handler(
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{params: {filePath}},
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response,
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context,
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);
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// Call handle to trigger formatting (similar to network tests)
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const responseData = await response.handle(context);
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const output = responseData.content
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.map(c => (c.type === 'text' ? c.text : ''))
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.join('\n');
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t.assert.snapshot(output);
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});
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});
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});
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describe('get_heapsnapshot_details', () => {
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it('with default options', async t => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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await getHeapSnapshotDetails.handler(
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{params: {filePath}},
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response,
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context,
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);
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const responseData = await response.handle(context);
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const output = responseData.content
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.map(c => (c.type === 'text' ? c.text : ''))
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.join('\n');
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t.assert.snapshot(output);
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});
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});
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it('with objectsRetainedByContexts filterName', async t => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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await getHeapSnapshotDetails.handler(
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{params: {filePath, filterName: 'objectsRetainedByContexts'}},
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response,
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context,
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);
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const responseData = await response.handle(context);
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const output = responseData.content
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.map(c => (c.type === 'text' ? c.text : ''))
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.join('\n');
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t.assert.snapshot(output);
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});
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});
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it('with sharedNativeContext filterName', async t => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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await getHeapSnapshotDetails.handler(
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{params: {filePath, filterName: 'sharedNativeContext'}},
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response,
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context,
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);
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const responseData = await response.handle(context);
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const output = responseData.content
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.map(c => (c.type === 'text' ? c.text : ''))
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.join('\n');
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t.assert.snapshot(output);
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});
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});
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it('with attributedToSpecificNativeContext filterName and objectId', async t => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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await getHeapSnapshotDetails.handler(
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{
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params: {
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filePath,
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filterName: 'attributedToSpecificNativeContext',
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objectId: 7249,
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pageSize: 10,
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},
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},
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response,
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context,
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);
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const responseData = await response.handle(context);
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const output = responseData.content
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.map(c => (c.type === 'text' ? c.text : ''))
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.join('\n');
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t.assert.snapshot(output);
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});
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});
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});
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describe('get_heapsnapshot_class_nodes', () => {
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it('with default options', async t => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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await context.getHeapSnapshotAggregates(filePath);
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await getHeapSnapshotClassNodes.handler(
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{params: {filePath, id: 19}},
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response,
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context,
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);
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const responseData = await response.handle(context);
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const output = responseData.content
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.map(c => (c.type === 'text' ? c.text : ''))
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.join('\n');
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t.assert.snapshot(output);
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});
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});
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it('with objectsRetainedByContexts filterName', async t => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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const aggregateData = await context.getHeapSnapshotAggregates(
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filePath,
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'objectsRetainedByContexts',
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);
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const aggregate = Object.values(aggregateData.aggregates).find(
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a => a.name === 'Function',
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);
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assert.ok(aggregate);
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const id = aggregate[stableIdSymbol];
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assert.ok(id);
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await getHeapSnapshotClassNodes.handler(
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{params: {filePath, id, filterName: 'objectsRetainedByContexts'}},
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response,
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context,
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);
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const responseData = await response.handle(context);
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const output = responseData.content
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.map(c => (c.type === 'text' ? c.text : ''))
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.join('\n');
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t.assert.snapshot(output);
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});
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});
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it('with non-existent class name', async () => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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await context.getHeapSnapshotAggregates(filePath);
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await assert.rejects(
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getHeapSnapshotClassNodes.handler(
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{params: {filePath, id: 999999}},
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response,
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context,
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),
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{message: 'Class with ID 999999 not found in heap snapshot'},
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);
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});
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});
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});
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describe('get_heapsnapshot_retainers', () => {
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it('with valid nodeId', async t => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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await getHeapSnapshotRetainers.handler(
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{params: {filePath, nodeId: 25341}},
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response,
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context,
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);
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const responseData = await response.handle(context);
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const output = responseData.content
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.map(c => (c.type === 'text' ? c.text : ''))
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.join('\n');
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t.assert.snapshot(output);
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});
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});
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});
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describe('get_heapsnapshot_object_details', () => {
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it('with valid nodeId', async t => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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await getHeapSnapshotObjectDetails.handler(
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{params: {filePath, nodeId: 25341}},
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response,
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context,
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);
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const responseData = await response.handle(context);
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const output = responseData.content
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.map(c => (c.type === 'text' ? c.text : ''))
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.join('\n');
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t.assert.snapshot(output);
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});
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});
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});
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describe('close_heapsnapshot', () => {
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it('with default options', async () => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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await getHeapSnapshotSummary.handler(
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{params: {filePath}},
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response,
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context,
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);
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assert.ok(context.hasHeapSnapshots());
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await closeHeapSnapshot.handler(
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{params: {filePath}},
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response,
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context,
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);
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assert.ok(
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response.responseLines.includes(`Closed heap snapshot: ${filePath}`),
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);
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assert.ok(!context.hasHeapSnapshots());
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});
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});
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it('with non-existent snapshot', async () => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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await assert.rejects(
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closeHeapSnapshot.handler({params: {filePath}}, response, context),
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{
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message: `Failed to close heap snapshot: ${filePath} was not loaded.`,
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},
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);
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});
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});
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});
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describe('get_heapsnapshot_retaining_paths', () => {
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it('with valid nodeId', async t => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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await getHeapSnapshotRetainingPaths.handler(
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{params: {filePath, nodeId: 45901}},
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response,
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context,
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);
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const responseData = await response.handle(context);
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const output = responseData.content
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.map(c => (c.type === 'text' ? c.text : ''))
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.join('\n');
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t.assert.snapshot(output);
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});
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});
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it('reports when limits are reached', async () => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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await getHeapSnapshotRetainingPaths.handler(
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{params: {filePath, nodeId: 45901, maxDepth: 1}},
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response,
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context,
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);
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const responseData = await response.handle(context);
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const output = responseData.content
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.map(c => (c.type === 'text' ? c.text : ''))
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.join('\n');
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assert.match(output, /No retaining paths found\./);
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assert.match(
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output,
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/Note: results are truncated, the following limits were reached: depth\./,
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);
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});
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});
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});
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describe('get_heapsnapshot_edges', () => {
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it('with valid nodeId', async t => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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await getHeapSnapshotEdges.handler(
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{params: {filePath, nodeId: 25341}},
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response,
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context,
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);
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const responseData = await response.handle(context);
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const output = responseData.content
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.map(c => (c.type === 'text' ? c.text : ''))
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.join('\n');
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t.assert.snapshot(output);
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});
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});
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it('with pagination', async t => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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await getHeapSnapshotEdges.handler(
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{params: {filePath, nodeId: 25341, pageSize: 2}},
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response,
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context,
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);
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const responseData = await response.handle(context);
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const output = responseData.content
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.map(c => (c.type === 'text' ? c.text : ''))
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.join('\n');
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t.assert.snapshot(output);
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});
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});
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it('with retainedSize range', async t => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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await getHeapSnapshotEdges.handler(
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{
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params: {
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filePath,
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nodeId: 25341,
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retainedSize: parseByteSizeRange('100B-100B'),
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},
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},
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response,
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context,
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);
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const responseData = await response.handle(context);
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const output = responseData.content
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.map(c => (c.type === 'text' ? c.text : ''))
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.join('\n');
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t.assert.snapshot(output);
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});
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});
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});
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describe('get_heapsnapshot_dominators', () => {
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it('with valid nodeId', async t => {
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await withMcpContext(async (response, context) => {
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const filePath = join(
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process.cwd(),
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'tests/fixtures/example.heapsnapshot',
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);
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await getHeapSnapshotDominators.handler(
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{params: {filePath, nodeId: 25341}},
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response,
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context,
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);
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const responseData = await response.handle(context);
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const output = responseData.content
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.map(c => (c.type === 'text' ? c.text : ''))
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.join('\n');
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t.assert.snapshot(output);
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});
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});
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});
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|
|
describe('compare_heapsnapshots', () => {
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it('compare heap-1 to heap-2', async t => {
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await withMcpContext(async (response, context) => {
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const filePathA = join(
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process.cwd(),
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'tests/fixtures/heap-1.heapsnapshot',
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);
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const filePathB = join(
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process.cwd(),
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'tests/fixtures/heap-2.heapsnapshot',
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);
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await compareHeapSnapshots.handler(
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{params: {baseFilePath: filePathA, currentFilePath: filePathB}},
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response,
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context,
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);
|
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const responseData = await response.handle(context);
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const output = responseData.content
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.map(c => (c.type === 'text' ? c.text : ''))
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.join('\n');
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t.assert.snapshot(output);
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});
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});
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|
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it('compare heap-2 to heap-3', async t => {
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await withMcpContext(async (response, context) => {
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const filePathA = join(
|
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process.cwd(),
|
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'tests/fixtures/heap-2.heapsnapshot',
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);
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const filePathB = join(
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process.cwd(),
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'tests/fixtures/heap-3.heapsnapshot',
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);
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await compareHeapSnapshots.handler(
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{params: {baseFilePath: filePathA, currentFilePath: filePathB}},
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response,
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context,
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);
|
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const responseData = await response.handle(context);
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const output = responseData.content
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.map(c => (c.type === 'text' ? c.text : ''))
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.join('\n');
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t.assert.snapshot(output);
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});
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});
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it('compare heap-1 to heap-2 with classIndex filter', async t => {
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await withMcpContext(async (response, context) => {
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const filePathA = join(
|
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process.cwd(),
|
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'tests/fixtures/heap-1.heapsnapshot',
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);
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const filePathB = join(
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process.cwd(),
|
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'tests/fixtures/heap-2.heapsnapshot',
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);
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|
await compareHeapSnapshots.handler(
|
|
{
|
|
params: {
|
|
baseFilePath: filePathA,
|
|
currentFilePath: filePathB,
|
|
classIndex: 2, // NewObject
|
|
},
|
|
},
|
|
response,
|
|
context,
|
|
);
|
|
|
|
const responseData = await response.handle(context);
|
|
const output = responseData.content
|
|
.map(c => (c.type === 'text' ? c.text : ''))
|
|
.join('\n');
|
|
|
|
t.assert.snapshot(output);
|
|
});
|
|
});
|
|
|
|
it('compare heap-1 to heap-2 with invalid classIndex throws error', async () => {
|
|
await withMcpContext(async (response, context) => {
|
|
const filePathA = join(
|
|
process.cwd(),
|
|
'tests/fixtures/heap-1.heapsnapshot',
|
|
);
|
|
const filePathB = join(
|
|
process.cwd(),
|
|
'tests/fixtures/heap-2.heapsnapshot',
|
|
);
|
|
|
|
await assert.rejects(
|
|
compareHeapSnapshots.handler(
|
|
{
|
|
params: {
|
|
baseFilePath: filePathA,
|
|
currentFilePath: filePathB,
|
|
classIndex: 99,
|
|
},
|
|
},
|
|
response,
|
|
context,
|
|
),
|
|
/Invalid classIndex: 99. Total classes with changes: 10/,
|
|
);
|
|
});
|
|
});
|
|
});
|
|
|
|
// Verifies that the caching mechanism in HeapSnapshotManager correctly
|
|
// distinguishes comparisons when the same "current" snapshot is compared
|
|
// against different "base" snapshots. If the cache key (diffCacheKey) is
|
|
// not unique per base snapshot, the second comparison might incorrectly
|
|
// return cached results from the first comparison.
|
|
it('compares the same current snapshot against different bases', async () => {
|
|
await withMcpContext(async (_response, context) => {
|
|
const filePathA = join(
|
|
process.cwd(),
|
|
'tests/fixtures/heap-1.heapsnapshot',
|
|
);
|
|
const filePathB = join(
|
|
process.cwd(),
|
|
'tests/fixtures/heap-2.heapsnapshot',
|
|
);
|
|
const filePathC = join(
|
|
process.cwd(),
|
|
'tests/fixtures/heap-3.heapsnapshot',
|
|
);
|
|
|
|
const firstDiff = await context.getHeapSnapshotClassDiffs(
|
|
filePathA,
|
|
filePathC,
|
|
);
|
|
const secondDiff = await context.getHeapSnapshotClassDiffs(
|
|
filePathB,
|
|
filePathC,
|
|
);
|
|
const firstNewObjectDiff = firstDiff.find(
|
|
entry => entry.className === 'NewObject',
|
|
);
|
|
const secondNewObjectDiff = secondDiff.find(
|
|
entry => entry.className === 'NewObject',
|
|
);
|
|
assert.ok(firstNewObjectDiff);
|
|
assert.ok(secondNewObjectDiff);
|
|
assert.equal(firstNewObjectDiff.addedCount, 7);
|
|
assert.equal(secondNewObjectDiff.addedCount, 5);
|
|
});
|
|
});
|
|
|
|
describe('get_heapsnapshot_duplicate_strings', () => {
|
|
it('with default options', async t => {
|
|
await withMcpContext(async (response, context) => {
|
|
const filePath = join(
|
|
process.cwd(),
|
|
'tests/fixtures/example.heapsnapshot',
|
|
);
|
|
|
|
await getHeapSnapshotDuplicateStrings.handler(
|
|
{params: {filePath}},
|
|
response,
|
|
context,
|
|
);
|
|
|
|
const responseData = await response.handle(context);
|
|
const output = responseData.content
|
|
.map(c => (c.type === 'text' ? c.text : ''))
|
|
.join('\n');
|
|
|
|
t.assert.snapshot(output);
|
|
});
|
|
});
|
|
});
|
|
|
|
describe('query_heapsnapshot_objects', () => {
|
|
it('with default options', async t => {
|
|
await withMcpContext(async (response, context) => {
|
|
const filePath = join(
|
|
process.cwd(),
|
|
'tests/fixtures/example.heapsnapshot',
|
|
);
|
|
|
|
await queryHeapSnapshotObjects.handler(
|
|
{params: {filePath, pageSize: 10}},
|
|
response,
|
|
context,
|
|
);
|
|
|
|
const responseData = await response.handle(context);
|
|
const output = responseData.content
|
|
.map(c => (c.type === 'text' ? c.text : ''))
|
|
.join('\n');
|
|
|
|
t.assert.snapshot(output);
|
|
});
|
|
});
|
|
|
|
it('with className filter', async t => {
|
|
await withMcpContext(async (response, context) => {
|
|
const filePath = join(
|
|
process.cwd(),
|
|
'tests/fixtures/example.heapsnapshot',
|
|
);
|
|
|
|
await queryHeapSnapshotObjects.handler(
|
|
{params: {filePath, className: 'Window', pageSize: 10}},
|
|
response,
|
|
context,
|
|
);
|
|
|
|
const responseData = await response.handle(context);
|
|
const output = responseData.content
|
|
.map(c => (c.type === 'text' ? c.text : ''))
|
|
.join('\n');
|
|
|
|
t.assert.snapshot(output);
|
|
});
|
|
});
|
|
|
|
it('with an unbounded retainedSize filter', async t => {
|
|
await withMcpContext(async (response, context) => {
|
|
const filePath = join(
|
|
process.cwd(),
|
|
'tests/fixtures/example.heapsnapshot',
|
|
);
|
|
|
|
await queryHeapSnapshotObjects.handler(
|
|
{
|
|
params: {
|
|
filePath,
|
|
retainedSize: parseByteSizeRange('1KB'),
|
|
pageSize: 10,
|
|
},
|
|
},
|
|
response,
|
|
context,
|
|
);
|
|
|
|
const responseData = await response.handle(context);
|
|
const output = responseData.content
|
|
.map(c => (c.type === 'text' ? c.text : ''))
|
|
.join('\n');
|
|
|
|
t.assert.snapshot(output);
|
|
});
|
|
});
|
|
|
|
it('with sortBy selfSize and pagination', async t => {
|
|
await withMcpContext(async (response, context) => {
|
|
const filePath = join(
|
|
process.cwd(),
|
|
'tests/fixtures/example.heapsnapshot',
|
|
);
|
|
|
|
await queryHeapSnapshotObjects.handler(
|
|
{params: {filePath, sortBy: 'selfSize', pageSize: 5, pageIdx: 0}},
|
|
response,
|
|
context,
|
|
);
|
|
|
|
const responseData = await response.handle(context);
|
|
const output = responseData.content
|
|
.map(c => (c.type === 'text' ? c.text : ''))
|
|
.join('\n');
|
|
|
|
t.assert.snapshot(output);
|
|
});
|
|
});
|
|
});
|
|
});
|