data-provider-temporary
Version:
Library that helps with server-to-client synchronization of data
290 lines (219 loc) • 8.49 kB
JavaScript
;function _asyncToGenerator(fn) {return function () {var gen = fn.apply(this, arguments);return new Promise(function (resolve, reject) {function step(key, arg) {try {var info = gen[key](arg);var value = info.value;} catch (error) {reject(error);return;}if (info.done) {resolve(value);} else {return Promise.resolve(value).then(function (value) {step("next", value);}, function (err) {step("throw", err);});}}return step("next");});};}
const utils = require('jest-matcher-utils'); /**
* Copyright (c) 2014, 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.
*
*
*/const matchers = require('./matchers');const spyMatchers = require('./spyMatchers');const toThrowMatchers = require('./toThrowMatchers');var _require = require('./jasmine-utils');const equals = _require.equals;var _require2 =
require('./asymmetric-matchers');const any = _require2.any,anything = _require2.anything,arrayContaining = _require2.arrayContaining,objectContaining = _require2.objectContaining,stringContaining = _require2.stringContaining,stringMatching = _require2.stringMatching;
const GLOBAL_STATE = Symbol.for('$$jest-matchers-object');
class JestAssertionError extends Error {}
const isPromise = obj => {
return (
!!obj && (
typeof obj === 'object' || typeof obj === 'function') &&
typeof obj.then === 'function');
};
if (!global[GLOBAL_STATE]) {
Object.defineProperty(global, GLOBAL_STATE, {
value: {
matchers: Object.create(null),
state: {
assertionCalls: 0,
expectedAssertionsNumber: null,
isExpectingAssertions: false,
suppressedErrors: [] } } });
}
const expect = actual => {
const allMatchers = global[GLOBAL_STATE].matchers;
const expectation = {
not: {},
rejects: { not: {} },
resolves: { not: {} } };
Object.keys(allMatchers).forEach(name => {
expectation[name] = makeThrowingMatcher(allMatchers[name], false, actual);
expectation.not[name] = makeThrowingMatcher(
allMatchers[name],
true,
actual);
expectation.resolves[name] = makeResolveMatcher(
name,
allMatchers[name],
false,
actual);
expectation.resolves.not[name] = makeResolveMatcher(
name,
allMatchers[name],
true,
actual);
expectation.rejects[name] = makeRejectMatcher(
name,
allMatchers[name],
false,
actual);
expectation.rejects.not[name] = makeRejectMatcher(
name,
allMatchers[name],
true,
actual);
});
return expectation;
};
const getMessage = message => {
// for performance reasons some of the messages are evaluated
// lazily
if (typeof message === 'function') {
message = message();
}
if (!message) {
message = utils.RECEIVED_COLOR(
'No message was specified for this matcher.');
}
return message;
};
const makeResolveMatcher = (
matcherName,
matcher,
isNot,
actual) => _asyncToGenerator(
function* () {for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {args[_key] = arguments[_key];}
const matcherStatement = `.resolves.${isNot ? 'not.' : ''}${matcherName}`;
if (!isPromise(actual)) {
throw new JestAssertionError(
utils.matcherHint(matcherStatement, 'received', '') +
'\n\n' +
`${utils.RECEIVED_COLOR('received')} value must be a Promise.\n` +
utils.printWithType('Received', actual, utils.printReceived));
}
let result;
try {
result = yield actual;
} catch (e) {
throw new JestAssertionError(
utils.matcherHint(matcherStatement, 'received', '') +
'\n\n' +
`Expected ${utils.RECEIVED_COLOR('received')} Promise to resolve, ` +
'instead it rejected to value\n' +
` ${utils.printReceived(e)}`);
}
return makeThrowingMatcher(matcher, isNot, result).apply(null, args);
});
const makeRejectMatcher = (
matcherName,
matcher,
isNot,
actual) => _asyncToGenerator(
function* () {for (var _len2 = arguments.length, args = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {args[_key2] = arguments[_key2];}
const matcherStatement = `.rejects.${isNot ? 'not.' : ''}${matcherName}`;
if (!isPromise(actual)) {
throw new JestAssertionError(
utils.matcherHint(matcherStatement, 'received', '') +
'\n\n' +
`${utils.RECEIVED_COLOR('received')} value must be a Promise.\n` +
utils.printWithType('Received', actual, utils.printReceived));
}
let result;
try {
result = yield actual;
} catch (e) {
return makeThrowingMatcher(matcher, isNot, e).apply(null, args);
}
throw new JestAssertionError(
utils.matcherHint(matcherStatement, 'received', '') +
'\n\n' +
`Expected ${utils.RECEIVED_COLOR('received')} Promise to reject, ` +
'instead it resolved to value\n' +
` ${utils.printReceived(result)}`);
});
const makeThrowingMatcher = (
matcher,
isNot,
actual) =>
{
return function throwingMatcher() {
let throws = true;
const matcherContext = Object.assign(
// 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 },
global[GLOBAL_STATE].state,
{
equals,
isNot,
utils });
let result;
try {for (var _len3 = arguments.length, args = Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {args[_key3] = arguments[_key3];}
result = matcher.apply(matcherContext, [actual].concat(args));
} catch (error) {
// Remove this and deeper functions from the stack trace frame.
Error.captureStackTrace(error, throwingMatcher);
throw error;
}
_validateResult(result);
global[GLOBAL_STATE].state.assertionCalls++;
if (result.pass && isNot || !result.pass && !isNot) {
// XOR
const message = getMessage(result.message);
const error = new JestAssertionError(message);
// 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;
// Remove this function from the stack trace frame.
Error.captureStackTrace(error, throwingMatcher);
if (throws) {
throw error;
} else {
global[GLOBAL_STATE].state.suppressedErrors.push(error);
}
}
};
};
expect.extend = matchers => {
Object.assign(global[GLOBAL_STATE].matchers, matchers);
};
expect.anything = anything;
expect.any = any;
expect.objectContaining = objectContaining;
expect.arrayContaining = arrayContaining;
expect.stringContaining = stringContaining;
expect.stringMatching = 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' +
`'${utils.stringify(result)}' was returned`);
}
};
// add default jest matchers
expect.extend(matchers);
expect.extend(spyMatchers);
expect.extend(toThrowMatchers);
expect.addSnapshotSerializer = () => void 0;
expect.assertions = expected => {
global[GLOBAL_STATE].state.expectedAssertionsNumber = expected;
};
expect.hasAssertions = expected => {
utils.ensureNoExpected(expected, '.hasAssertions');
global[GLOBAL_STATE].state.isExpectingAssertions = true;
};
expect.setState = state => {
Object.assign(global[GLOBAL_STATE].state, state);
};
expect.getState = () => global[GLOBAL_STATE].state;
module.exports = expect;