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/**
* Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
*
*/
'use strict';
const diff = require('jest-diff');
const fileExists = require('jest-file-exists');
const fs = require('fs');
const path = require('path');
const SnapshotState = require('./State');var _require =
require('./plugins');const addSerializer = _require.addSerializer,getSerializers = _require.getSerializers;var _require2 =
require('jest-matcher-utils');const EXPECTED_COLOR = _require2.EXPECTED_COLOR,ensureNoExpected = _require2.ensureNoExpected,matcherHint = _require2.matcherHint,RECEIVED_COLOR = _require2.RECEIVED_COLOR;var _require3 =
require('./utils');const SNAPSHOT_EXTENSION = _require3.SNAPSHOT_EXTENSION;
const cleanup = (hasteFS, update) => {
const pattern = '\\.' + SNAPSHOT_EXTENSION + '$';
const files = hasteFS.matchFiles(pattern);
const filesRemoved = files.
filter(snapshotFile => !fileExists(
path.resolve(
path.dirname(snapshotFile),
'..',
path.basename(snapshotFile, '.' + SNAPSHOT_EXTENSION)),
hasteFS)).
map(snapshotFile => {
if (update) {
fs.unlinkSync(snapshotFile);
}
}).
length;
return {
filesRemoved };
};
const initializeSnapshotState = (
testFile,
update,
testPath,
expand) =>
new SnapshotState(testFile, update, testPath, expand);
const toMatchSnapshot = function (received, testName) {
this.dontThrow && this.dontThrow();const
currentTestName = this.currentTestName,isNot = this.isNot,snapshotState = this.snapshotState;
if (isNot) {
throw new Error(
'Jest: `.not` cannot be used with `.toMatchSnapshot()`.');
}
if (!snapshotState) {
throw new Error('Jest: snapshot state must be initialized.');
}
const result = snapshotState.match(testName || currentTestName, received);const
pass = result.pass;
if (pass) {
return { message: '', pass: true };
} else {const
count = result.count,expected = result.expected,actual = result.actual;
const expectedString = expected.trim();
const actualString = actual.trim();
const diffMessage = diff(
expectedString,
actualString,
{
aAnnotation: 'Snapshot',
bAnnotation: 'Received',
expand: snapshotState.expand });
const report =
() => `${RECEIVED_COLOR('Received value')} does not match ` +
`${EXPECTED_COLOR('stored snapshot ' + count)}.\n\n` + (
diffMessage ||
RECEIVED_COLOR('- ' + expectedString) + '\n' +
EXPECTED_COLOR('+ ' + actualString));
const message =
() => matcherHint('.toMatchSnapshot', 'value', '') + '\n\n' +
report();
// Passing the the actual and expected objects so that a custom reporter
// could access them, for example in order to display a custom visual diff,
// or create a different error message
return {
actual: actualString,
expected: expectedString,
message,
name: 'toMatchSnapshot',
pass: false,
report };
}
};
const toThrowErrorMatchingSnapshot = function (received, expected) {
this.dontThrow && this.dontThrow();const
isNot = this.isNot;
if (isNot) {
throw new Error(
'Jest: `.not` cannot be used with `.toThrowErrorMatchingSnapshot()`.');
}
ensureNoExpected(expected, '.toThrowErrorMatchingSnapshot');
let error;
try {
received();
} catch (e) {
error = e;
}
if (error === undefined) {
throw new Error(
matcherHint('.toThrowErrorMatchingSnapshot', '() => {}', '') + '\n\n' +
`Expected the function to throw an error.\n` +
`But it didn't throw anything.`);
}
return toMatchSnapshot.call(this, error.message);
};
module.exports = {
EXTENSION: SNAPSHOT_EXTENSION,
SnapshotState,
addSerializer,
cleanup,
getSerializers,
initializeSnapshotState,
toMatchSnapshot,
toThrowErrorMatchingSnapshot };
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