KaneAI - World’s First E2E Software Testing Agent.Book a Demo Join TestMu Conference

How to use isLegacySnapshot method in ava

Best JavaScript code snippet using ava

snapshot-manager.js

Source:snapshot-manager.js

...46	}47}48exports.VersionMismatchError = VersionMismatchError;49const LEGACY_SNAPSHOT_HEADER = Buffer.from('// Jest Snapshot v1');50function isLegacySnapshot(buffer) {51	return LEGACY_SNAPSHOT_HEADER.equals(buffer.slice(0, LEGACY_SNAPSHOT_HEADER.byteLength));52}53class LegacyError extends SnapshotError {54	constructor(snapPath) {55		super('Legacy snapshot file', snapPath);56		this.name = 'LegacyError';57	}58}59exports.LegacyError = LegacyError;60function tryRead(file) {61	try {62		return fs.readFileSync(file);63	} catch (err) {64		if (err.code === 'ENOENT') {65			return null;66		}67		throw err;68	}69}70function withoutLineEndings(buffer) {71	let newLength = buffer.byteLength - 1;72	while (buffer[newLength] === 0x0A || buffer[newLength] === 0x0D) {73		newLength--;74	}75	return buffer.slice(0, newLength);76}77function formatEntry(label, descriptor) {78	if (label) {79		label = `> ${label}\n\n`;80	}81	const codeBlock = indentString(concordance.formatDescriptor(descriptor, concordanceOptions), 4);82	return Buffer.from(label + codeBlock, 'utf8');83}84function combineEntries(entries) {85	const buffers = [];86	let byteLength = 0;87	const sortedKeys = Array.from(entries.keys()).sort();88	for (const key of sortedKeys) {89		const keyBuffer = Buffer.from(`\n\n## ${key}\n\n`, 'utf8');90		buffers.push(keyBuffer);91		byteLength += keyBuffer.byteLength;92		const formattedEntries = entries.get(key);93		const last = formattedEntries[formattedEntries.length - 1];94		for (const entry of formattedEntries) {95			buffers.push(entry);96			byteLength += entry.byteLength;97			if (entry !== last) {98				buffers.push(REPORT_SEPARATOR);99				byteLength += REPORT_SEPARATOR.byteLength;100			}101		}102	}103	return {buffers, byteLength};104}105function generateReport(relFile, snapFile, entries) {106	const combined = combineEntries(entries);107	const buffers = combined.buffers;108	let byteLength = combined.byteLength;109	const header = Buffer.from(`# Snapshot report for \`${relFile}\`110The actual snapshot is saved in \`${snapFile}\`.111Generated by [AVA](https://ava.li).`, 'utf8');112	buffers.unshift(header);113	byteLength += header.byteLength;114	buffers.push(REPORT_TRAILING_NEWLINE);115	byteLength += REPORT_TRAILING_NEWLINE.byteLength;116	return Buffer.concat(buffers, byteLength);117}118function appendReportEntries(existingReport, entries) {119	const combined = combineEntries(entries);120	const buffers = combined.buffers;121	let byteLength = combined.byteLength;122	const prepend = withoutLineEndings(existingReport);123	buffers.unshift(prepend);124	byteLength += prepend.byteLength;125	return Buffer.concat(buffers, byteLength);126}127function encodeSnapshots(buffersByHash) {128	const buffers = [];129	let byteOffset = 0;130	// Entry start and end pointers are relative to the header length. This means131	// it's possible to append new entries to an existing snapshot file, without132	// having to rewrite pointers for existing entries.133	const headerLength = Buffer.alloc(4);134	buffers.push(headerLength);135	byteOffset += 4;136	// Allows 65535 hashes (tests or identified snapshots) per file.137	const numHashes = Buffer.alloc(2);138	numHashes.writeUInt16LE(buffersByHash.size);139	buffers.push(numHashes);140	byteOffset += 2;141	const entries = [];142	for (const pair of buffersByHash) {143		const hash = pair[0];144		const snapshotBuffers = pair[1];145		buffers.push(Buffer.from(hash, 'hex'));146		byteOffset += MD5_HASH_LENGTH;147		// Allows 65535 snapshots per hash.148		const numSnapshots = Buffer.alloc(2);149		numSnapshots.writeUInt16LE(snapshotBuffers.length, 0);150		buffers.push(numSnapshots);151		byteOffset += 2;152		for (const value of snapshotBuffers) {153			// Each pointer is 32 bits, restricting the total, uncompressed buffer to154			// 4 GiB.155			const start = Buffer.alloc(4);156			const end = Buffer.alloc(4);157			entries.push({start, end, value});158			buffers.push(start, end);159			byteOffset += 8;160		}161	}162	headerLength.writeUInt32LE(byteOffset, 0);163	let bodyOffset = 0;164	for (const entry of entries) {165		const start = bodyOffset;166		const end = bodyOffset + entry.value.byteLength;167		entry.start.writeUInt32LE(start, 0);168		entry.end.writeUInt32LE(end, 0);169		buffers.push(entry.value);170		bodyOffset = end;171	}172	byteOffset += bodyOffset;173	const compressed = zlib.gzipSync(Buffer.concat(buffers, byteOffset));174	const md5sum = crypto.createHash('md5').update(compressed).digest();175	return Buffer.concat([176		READABLE_PREFIX,177		VERSION_HEADER,178		md5sum,179		compressed180	], READABLE_PREFIX.byteLength + VERSION_HEADER.byteLength + MD5_HASH_LENGTH + compressed.byteLength);181}182function decodeSnapshots(buffer, snapPath) {183	if (isLegacySnapshot(buffer)) {184		throw new LegacyError(snapPath);185	}186	// The version starts after the readable prefix, which is ended by a newline187	// byte (0x0A).188	const versionOffset = buffer.indexOf(0x0A) + 1;189	const version = buffer.readUInt16LE(versionOffset);190	if (version !== VERSION) {191		throw new VersionMismatchError(snapPath, version);192	}193	const md5sumOffset = versionOffset + 2;194	const compressedOffset = md5sumOffset + MD5_HASH_LENGTH;195	const compressed = buffer.slice(compressedOffset);196	const md5sum = crypto.createHash('md5').update(compressed).digest();197	const expectedSum = buffer.slice(md5sumOffset, compressedOffset);...

Using AI Code Generation

1const test = require('ava');2const isLegacySnapshot = require('ava/lib/is-legacy-snapshot');3test('isLegacySnapshot', t => {4    t.true(isLegacySnapshot('test.js.snap'));5    t.false(isLegacySnapshot('test.js.md'));6    t.false(isLegacySnapshot('test.js'));7    t.false(isLegacySnapshot('test.js.md~'));8    t.false(isLegacySnapshot('test.js~'));9});10### isLegacySnapshot(filePath)11- [ava/lib/is-legacy-snapshot.js](

Using AI Code Generation

1import test from 'ava';2import { isLegacySnapshot } from 'ava/lib/snapshot-manager';3test('test', t => {4    if (isLegacySnapshot()) {5        t.snapshot({ a: 1 });6    } else {7        t.snapshot({ a: 1 }, { id: 'snapshot 1' });8    }9});

Using AI Code Generation

1import test from 'ava';2import { isLegacySnapshot } from 'ava/lib/test-worker/snapshot-manager.js';3test('isLegacySnapshot', t => {4    t.true(isLegacySnapshot('test.js.snap'));5    t.false(isLegacySnapshot('test.js.md'));6    t.false(isLegacySnapshot('test.js.md.snap'));7});

Using AI Code Generation

1import test from 'ava';2import {isLegacySnapshot} from 'ava/lib/worker/options';3test('isLegacySnapshot', t => {4	t.true(isLegacySnapshot());5});6MIT © [Vadim Demedes](

Using AI Code Generation

1const availableSnapshot = require("snapshot");2const isLegacySnapshot = availableSnapshot.isLegacySnapshot;3const availableSnapshot = require("snapshot");4const isLegacySnapshot = availableSnapshot.isLegacySnapshot;5const availableSnapshot = require("snapshot");6const getSnapshot = availableSnapshot.getSnapshot;7const availableSnapshot = require("snapshot");8const getSnapshot = availableSnapshot.getSnapshot;9const availableSnapshot = require("snapshot");10const getSnapshot = availableSnapshot.getSnapshot;11const availableSnapshot = require("snapshot");12const getSnapshot = availableSnapshot.getSnapshot;13const availableSnapshot = require("snapshot");14const getSnapshot = availableSnapshot.getSnapshot;15const availableSnapshot = require("snapshot");16const getSnapshot = availableSnapshot.getSnapshot;17const availableSnapshot = require("snapshot");18const getSnapshot = availableSnapshot.getSnapshot;19const availableSnapshot = require("snapshot");20const getSnapshot = availableSnapshot.getSnapshot;21const availableSnapshot = require("snapshot");22const getSnapshot = availableSnapshot.getSnapshot;23const availableSnapshot = require("snapshot");24const getSnapshot = availableSnapshot.getSnapshot;25const availableSnapshot = require("snapshot");26const isLegacySnapshot = availableSnapshot.isLegacySnapshot;27const availableSnapshot = require("snapshot");28const getSnapshot = availableSnapshot.getSnapshot;29const availableSnapshot = require("snapshot");30const getSnapshot = availableSnapshot.getSnapshot;31const availableSnapshot = require("snapshot");32const getSnapshot = availableSnapshot.getSnapshot;

Using AI Code Generation

1var snapshot = require('snap-shot-it');2### snapshot(value, [name])3### snapshot.isLegacySnapshot(name)4### snapshot.isNewSnapshot(name)5### snapshot.isSnapshot(name)6### snapshot.clean([options])7### snapshot.cleanMatch([options])8### snapshot.cleanMismatch([options])9### snapshot.cleanUnused([options])10### snapshot.cleanAll([options])

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.