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JavaScript

'use strict';
var matcherUtils = _interopRequireWildcard(require('jest-matcher-utils'));
var _asymmetricMatchers = require('./asymmetricMatchers');
var _extractExpectedAssertionsErrors = _interopRequireDefault(
require('./extractExpectedAssertionsErrors')
);
var _jasmineUtils = require('./jasmineUtils');
var _jestMatchersObject = require('./jestMatchersObject');
var _matchers = _interopRequireDefault(require('./matchers'));
var _spyMatchers = _interopRequireDefault(require('./spyMatchers'));
var _toThrowMatchers = _interopRequireWildcard(require('./toThrowMatchers'));
var _utils = require('./utils');
function _interopRequireDefault(obj) {
return obj && obj.__esModule ? obj : {default: obj};
}
function _getRequireWildcardCache() {
if (typeof WeakMap !== 'function') return null;
var cache = new WeakMap();
_getRequireWildcardCache = function () {
return cache;
};
return cache;
}
function _interopRequireWildcard(obj) {
if (obj && obj.__esModule) {
return obj;
}
if (obj === null || (typeof obj !== 'object' && typeof obj !== 'function')) {
return {default: obj};
}
var cache = _getRequireWildcardCache();
if (cache && cache.has(obj)) {
return cache.get(obj);
}
var newObj = {};
var hasPropertyDescriptor =
Object.defineProperty && Object.getOwnPropertyDescriptor;
for (var key in obj) {
if (Object.prototype.hasOwnProperty.call(obj, key)) {
var desc = hasPropertyDescriptor
? Object.getOwnPropertyDescriptor(obj, key)
: null;
if (desc && (desc.get || desc.set)) {
Object.defineProperty(newObj, key, desc);
} else {
newObj[key] = obj[key];
}
}
}
newObj.default = obj;
if (cache) {
cache.set(obj, newObj);
}
return newObj;
}
var Symbol = global['jest-symbol-do-not-touch'] || global.Symbol;
var Symbol = global['jest-symbol-do-not-touch'] || global.Symbol;
var Promise = global[Symbol.for('jest-native-promise')] || global.Promise;
function _defineProperty(obj, key, value) {
if (key in obj) {
Object.defineProperty(obj, key, {
value: value,
enumerable: true,
configurable: true,
writable: true
});
} else {
obj[key] = value;
}
return obj;
}
class JestAssertionError extends Error {
constructor(...args) {
super(...args);
_defineProperty(this, 'matcherResult', void 0);
}
}
const isPromise = obj =>
!!obj &&
(typeof obj === 'object' || typeof obj === 'function') &&
typeof obj.then === 'function';
const createToThrowErrorMatchingSnapshotMatcher = function (matcher) {
return function (received, testNameOrInlineSnapshot) {
return matcher.apply(this, [received, testNameOrInlineSnapshot, true]);
};
};
const getPromiseMatcher = (name, matcher) => {
if (name === 'toThrow' || name === 'toThrowError') {
return (0, _toThrowMatchers.createMatcher)(name, true);
} else if (
name === 'toThrowErrorMatchingSnapshot' ||
name === 'toThrowErrorMatchingInlineSnapshot'
) {
return createToThrowErrorMatchingSnapshotMatcher(matcher);
}
return null;
};
const expect = (actual, ...rest) => {
if (rest.length !== 0) {
throw new Error('Expect takes at most one argument.');
}
const allMatchers = (0, _jestMatchersObject.getMatchers)();
const expectation = {
not: {},
rejects: {
not: {}
},
resolves: {
not: {}
}
};
const err = new JestAssertionError();
Object.keys(allMatchers).forEach(name => {
const matcher = allMatchers[name];
const promiseMatcher = getPromiseMatcher(name, matcher) || matcher;
expectation[name] = makeThrowingMatcher(matcher, false, '', actual);
expectation.not[name] = makeThrowingMatcher(matcher, true, '', actual);
expectation.resolves[name] = makeResolveMatcher(
name,
promiseMatcher,
false,
actual,
err
);
expectation.resolves.not[name] = makeResolveMatcher(
name,
promiseMatcher,
true,
actual,
err
);
expectation.rejects[name] = makeRejectMatcher(
name,
promiseMatcher,
false,
actual,
err
);
expectation.rejects.not[name] = makeRejectMatcher(
name,
promiseMatcher,
true,
actual,
err
);
});
return expectation;
};
const getMessage = message =>
(message && message()) ||
matcherUtils.RECEIVED_COLOR('No message was specified for this matcher.');
const makeResolveMatcher = (matcherName, matcher, isNot, actual, outerErr) => (
...args
) => {
const options = {
isNot,
promise: 'resolves'
};
if (!isPromise(actual)) {
throw new JestAssertionError(
matcherUtils.matcherErrorMessage(
matcherUtils.matcherHint(matcherName, undefined, '', options),
`${matcherUtils.RECEIVED_COLOR('received')} value must be a promise`,
matcherUtils.printWithType(
'Received',
actual,
matcherUtils.printReceived
)
)
);
}
const innerErr = new JestAssertionError();
return actual.then(
result =>
makeThrowingMatcher(matcher, isNot, 'resolves', result, innerErr).apply(
null,
args
),
reason => {
outerErr.message =
matcherUtils.matcherHint(matcherName, undefined, '', options) +
'\n\n' +
`Received promise rejected instead of resolved\n` +
`Rejected to value: ${matcherUtils.printReceived(reason)}`;
return Promise.reject(outerErr);
}
);
};
const makeRejectMatcher = (matcherName, matcher, isNot, actual, outerErr) => (
...args
) => {
const options = {
isNot,
promise: 'rejects'
};
const actualWrapper = typeof actual === 'function' ? actual() : actual;
if (!isPromise(actualWrapper)) {
throw new JestAssertionError(
matcherUtils.matcherErrorMessage(
matcherUtils.matcherHint(matcherName, undefined, '', options),
`${matcherUtils.RECEIVED_COLOR(
'received'
)} value must be a promise or a function returning a promise`,
matcherUtils.printWithType(
'Received',
actual,
matcherUtils.printReceived
)
)
);
}
const innerErr = new JestAssertionError();
return actualWrapper.then(
result => {
outerErr.message =
matcherUtils.matcherHint(matcherName, undefined, '', options) +
'\n\n' +
`Received promise resolved instead of rejected\n` +
`Resolved to value: ${matcherUtils.printReceived(result)}`;
return Promise.reject(outerErr);
},
reason =>
makeThrowingMatcher(matcher, isNot, 'rejects', reason, innerErr).apply(
null,
args
)
);
};
const makeThrowingMatcher = (matcher, isNot, promise, actual, err) =>
function throwingMatcher(...args) {
let throws = true;
const utils = {
...matcherUtils,
iterableEquality: _utils.iterableEquality,
subsetEquality: _utils.subsetEquality
};
const matcherContext = {
// When throws is disabled, the matcher will not throw errors during test
// execution but instead add them to the global matcher state. If a
// matcher throws, test execution is normally stopped immediately. The
// snapshot matcher uses it because we want to log all snapshot
// failures in a test.
dontThrow: () => (throws = false),
...(0, _jestMatchersObject.getState)(),
equals: _jasmineUtils.equals,
error: err,
isNot,
promise,
utils
};
const processResult = (result, asyncError) => {
_validateResult(result);
(0, _jestMatchersObject.getState)().assertionCalls++;
if ((result.pass && isNot) || (!result.pass && !isNot)) {
// XOR
const message = getMessage(result.message);
let error;
if (err) {
error = err;
error.message = message;
} else if (asyncError) {
error = asyncError;
error.message = message;
} else {
error = new JestAssertionError(message); // Try to remove this function from the stack trace frame.
// Guard for some environments (browsers) that do not support this feature.
if (Error.captureStackTrace) {
Error.captureStackTrace(error, throwingMatcher);
}
} // Passing the result of the matcher with the error so that a custom
// reporter could access the actual and expected objects of the result
// for example in order to display a custom visual diff
error.matcherResult = result;
if (throws) {
throw error;
} else {
(0, _jestMatchersObject.getState)().suppressedErrors.push(error);
}
}
};
const handleError = error => {
if (
matcher[_jestMatchersObject.INTERNAL_MATCHER_FLAG] === true &&
!(error instanceof JestAssertionError) &&
error.name !== 'PrettyFormatPluginError' && // Guard for some environments (browsers) that do not support this feature.
Error.captureStackTrace
) {
// Try to remove this and deeper functions from the stack trace frame.
Error.captureStackTrace(error, throwingMatcher);
}
throw error;
};
let potentialResult;
try {
potentialResult =
matcher[_jestMatchersObject.INTERNAL_MATCHER_FLAG] === true
? matcher.call(matcherContext, actual, ...args) // It's a trap specifically for inline snapshot to capture this name
: // in the stack trace, so that it can correctly get the custom matcher
// function call.
(function __EXTERNAL_MATCHER_TRAP__() {
return matcher.call(matcherContext, actual, ...args);
})();
if (isPromise(potentialResult)) {
const asyncResult = potentialResult;
const asyncError = new JestAssertionError();
if (Error.captureStackTrace) {
Error.captureStackTrace(asyncError, throwingMatcher);
}
return asyncResult
.then(aResult => processResult(aResult, asyncError))
.catch(handleError);
} else {
const syncResult = potentialResult;
return processResult(syncResult);
}
} catch (error) {
return handleError(error);
}
};
expect.extend = matchers =>
(0, _jestMatchersObject.setMatchers)(matchers, false, expect);
expect.anything = _asymmetricMatchers.anything;
expect.any = _asymmetricMatchers.any;
expect.not = {
arrayContaining: _asymmetricMatchers.arrayNotContaining,
objectContaining: _asymmetricMatchers.objectNotContaining,
stringContaining: _asymmetricMatchers.stringNotContaining,
stringMatching: _asymmetricMatchers.stringNotMatching
};
expect.objectContaining = _asymmetricMatchers.objectContaining;
expect.arrayContaining = _asymmetricMatchers.arrayContaining;
expect.stringContaining = _asymmetricMatchers.stringContaining;
expect.stringMatching = _asymmetricMatchers.stringMatching;
const _validateResult = result => {
if (
typeof result !== 'object' ||
typeof result.pass !== 'boolean' ||
(result.message &&
typeof result.message !== 'string' &&
typeof result.message !== 'function')
) {
throw new Error(
'Unexpected return from a matcher function.\n' +
'Matcher functions should ' +
'return an object in the following format:\n' +
' {message?: string | function, pass: boolean}\n' +
`'${matcherUtils.stringify(result)}' was returned`
);
}
};
function assertions(expected) {
const error = new Error();
if (Error.captureStackTrace) {
Error.captureStackTrace(error, assertions);
}
(0, _jestMatchersObject.getState)().expectedAssertionsNumber = expected;
(0, _jestMatchersObject.getState)().expectedAssertionsNumberError = error;
}
function hasAssertions(...args) {
const error = new Error();
if (Error.captureStackTrace) {
Error.captureStackTrace(error, hasAssertions);
}
matcherUtils.ensureNoExpected(args[0], '.hasAssertions');
(0, _jestMatchersObject.getState)().isExpectingAssertions = true;
(0, _jestMatchersObject.getState)().isExpectingAssertionsError = error;
} // add default jest matchers
(0, _jestMatchersObject.setMatchers)(_matchers.default, true, expect);
(0, _jestMatchersObject.setMatchers)(_spyMatchers.default, true, expect);
(0, _jestMatchersObject.setMatchers)(_toThrowMatchers.default, true, expect);
expect.addSnapshotSerializer = () => void 0;
expect.assertions = assertions;
expect.hasAssertions = hasAssertions;
expect.getState = _jestMatchersObject.getState;
expect.setState = _jestMatchersObject.setState;
expect.extractExpectedAssertionsErrors =
_extractExpectedAssertionsErrors.default;
const expectExport = expect;
module.exports = expectExport;