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])

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