How to use createTopLevelExpect method in unexpected

Best JavaScript code snippet using unexpected

createTopLevelExpect.js

Source:createTopLevelExpect.js

...1418  const clonedAssertions = {};1419  Object.keys(this.assertions).forEach(function (assertion) {1420    clonedAssertions[assertion] = [].concat(this.assertions[assertion]);1421  }, this);1422  const expect = createTopLevelExpect({1423    assertions: clonedAssertions,1424    types: [].concat(this.types),1425    typeByName: extend({}, this.typeByName),1426    output: this.output.clone(),1427    format: this.outputFormat(),1428    installedPlugins: [].concat(this.installedPlugins),1429  });1430  // Install the hooks:1431  this.installedHooks.forEach((hook) => {1432    expect.hook(hook);1433  });1434  // expect._expect = this._expect;1435  // Make sure that changes to the parent's preferredWidth doesn't propagate:1436  expect.output.preferredWidth = this.output.preferredWidth;1437  return expect;1438};1439expectPrototype.child = function () {1440  this._assertTopLevelExpect();1441  const childExpect = createTopLevelExpect(1442    {1443      assertions: {},1444      types: [],1445      typeByName: {},1446      output: this.output.clone(),1447      format: this.outputFormat(),1448      installedPlugins: [],1449    },1450    this1451  );1452  childExpect.exportAssertion = function (testDescription, handler) {1453    childExpect.parent.addAssertion(testDescription, handler, childExpect);1454    return this;1455  };1456  childExpect.exportType = function (type) {1457    if (childExpect.getType(type.name) !== type) {1458      childExpect.addType(type);1459    }1460    childExpect.parent.addType(type, childExpect);1461    return this;1462  };1463  childExpect.exportStyle = function (name, handler, allowRedefinition) {1464    childExpect.parent.addStyle(1465      name,1466      function (...args) {1467        const childOutput = childExpect.createOutput(this.format);1468        this.append(handler.call(childOutput, ...args) || childOutput);1469      },1470      allowRedefinition1471    );1472    return this;1473  };1474  return childExpect;1475};1476expectPrototype.freeze = function () {1477  this._assertTopLevelExpect();1478  this._frozen = true;1479  return this;1480};1481expectPrototype.outputFormat = function (format) {1482  if (typeof format === 'undefined') {1483    return this._outputFormat;1484  } else {1485    this._assertTopLevelExpect();1486    this._outputFormat = format;1487    return this;1488  }1489};1490expectPrototype.createOutput = function (format) {1491  const that = this;1492  const output = this.output.clone(format || 'text');1493  output.addStyle('appendInspected', function (value, depth) {1494    this.append(that.inspect(value, depth, this.clone()));1495  });1496  return output;1497};1498expectPrototype.hook = function (fn) {1499  this._assertTopLevelExpect();1500  if (this._frozen) {1501    throw new Error(1502      'Cannot install a hook into a frozen instance, please run .clone() first'1503    );1504  }1505  this.installedHooks.push(fn);1506  this._expect = fn(this._expect.bind(this));1507};1508// This is not super elegant, but wrappedExpect.fail was different:1509expectPrototype.fail = function (...args) {1510  // Cannot use this !== this._topLevelExpect due to https://github.com/unexpectedjs/unexpected/issues/6311511  if (this.flags) {1512    this._callInNestedContext(() => {1513      this._topLevelExpect._fail(...args);1514    });1515  } else {1516    try {1517      this._fail(...args);1518    } catch (e) {1519      if (e && e._isUnexpected) {1520        this.setErrorMessage(e);1521      }1522      throw e;1523    }1524  }1525};1526function lookupAssertionsInParentChain(assertionString, expect) {1527  const assertions = [];1528  for (let instance = expect; instance; instance = instance.parent) {1529    if (instance.assertions[assertionString]) {1530      assertions.push(...instance.assertions[assertionString]);1531    }1532  }1533  return assertions;1534}1535function findSuffixAssertions(assertionString, expect) {1536  if (typeof assertionString !== 'string') {1537    return null;1538  }1539  const straightforwardAssertions = lookupAssertionsInParentChain(1540    assertionString,1541    expect1542  );1543  if (straightforwardAssertions.length > 0) {1544    return straightforwardAssertions;1545  }1546  const tokens = assertionString.split(' ');1547  for (let n = tokens.length - 1; n > 0; n -= 1) {1548    const suffix = tokens.slice(n).join(' ');1549    const suffixAssertions = lookupAssertionsInParentChain(suffix, expect);1550    if (1551      findSuffixAssertions(tokens.slice(0, n).join(' '), expect) &&1552      suffixAssertions.length > 01553    ) {1554      return suffixAssertions;1555    }1556  }1557  return null;1558}1559expectPrototype.standardErrorMessage = function (output, options) {1560  this._assertWrappedExpect();1561  options = typeof options === 'object' ? options : {};1562  if ('omitSubject' in output) {1563    options.subject = this.subject;1564  }1565  if (options && options.compact) {1566    options.compactSubject = (output) => {1567      output.jsFunctionName(this.subjectType.name);1568    };1569  }1570  return createStandardErrorMessage(1571    output,1572    this.subjectOutput,1573    this.testDescription,1574    this.argsOutput,1575    options1576  );1577};1578expectPrototype._callInNestedContext = function (callback) {1579  this._assertWrappedExpect();1580  try {1581    let result = oathbreaker(callback());1582    if (utils.isPromise(result)) {1583      result = wrapPromiseIfNecessary(result);1584      if (result.isPending()) {1585        result = result.then(undefined, (e) => {1586          if (e && e._isUnexpected) {1587            const wrappedError = new UnexpectedError(this, e);1588            wrappedError.originalError = e.originalError;1589            throw wrappedError;1590          }1591          throw e;1592        });1593      }1594    } else {1595      result = makePromise.resolve(result);1596    }1597    return addAdditionalPromiseMethods(result, this.execute, this.subject);1598  } catch (e) {1599    if (e && e._isUnexpected) {1600      const wrappedError = new UnexpectedError(this, e);1601      wrappedError.originalError = e.originalError;1602      throw wrappedError;1603    }1604    throw e;1605  }1606};1607expectPrototype.shift = function (subject, assertionIndex) {1608  this._assertWrappedExpect();1609  if (arguments.length <= 1) {1610    if (arguments.length === 0) {1611      subject = this.subject;1612    }1613    assertionIndex = -1;1614    for (let i = 0; i < this.assertionRule.args.length; i += 1) {1615      const type = this.assertionRule.args[i].type;1616      if (type.is('assertion') || type.is('expect.it')) {1617        assertionIndex = i;1618        break;1619      }1620    }1621  } else if (arguments.length === 3) {1622    // The 3-argument syntax for wrappedExpect.shift is deprecated, please omit the first (expect) arg1623    subject = arguments[1];1624    assertionIndex = arguments[2];1625  }1626  if (assertionIndex !== -1) {1627    const args = this.args.slice(0, assertionIndex);1628    const rest = this.args.slice(assertionIndex);1629    const nextArgumentType = this.findTypeOf(rest[0]);1630    if (arguments.length > 1) {1631      // Legacy1632      this.argsOutput = (output) => {1633        args.forEach((arg, index) => {1634          if (index > 0) {1635            output.text(', ');1636          }1637          output.appendInspected(arg);1638        });1639        if (args.length > 0) {1640          output.sp();1641        }1642        if (nextArgumentType.is('string')) {1643          output.error(rest[0]);1644        } else if (rest.length > 0) {1645          output.appendInspected(rest[0]);1646        }1647        if (rest.length > 1) {1648          output.sp();1649        }1650        rest.slice(1).forEach((arg, index) => {1651          if (index > 0) {1652            output.text(', ');1653          }1654          output.appendInspected(arg);1655        });1656      };1657    }1658    if (nextArgumentType.is('expect.it')) {1659      return this.withError(1660        () => rest[0](subject),1661        (err) => {1662          this.fail(err);1663        }1664      );1665    } else if (nextArgumentType.is('string')) {1666      return this.execute(subject, ...rest);1667    } else {1668      return subject;1669    }1670  } else {1671    // No assertion to delegate to. Provide the new subject as the fulfillment value:1672    return subject;1673  }1674};1675expectPrototype._getSubjectType = function () {1676  this._assertWrappedExpect();1677  return this.findTypeOfWithParentType(1678    this.subject,1679    this.assertionRule.subject.type1680  );1681};1682expectPrototype._getArgTypes = function (index) {1683  this._assertWrappedExpect();1684  const lastIndex = this.assertionRule.args.length - 1;1685  return this.args.map((arg, index) => {1686    return this.findTypeOfWithParentType(1687      arg,1688      this.assertionRule.args[Math.min(index, lastIndex)].type1689    );1690  });1691};1692expectPrototype._getAssertionIndices = function () {1693  this._assertWrappedExpect();1694  if (!this._assertionIndices) {1695    const assertionIndices = [];1696    const args = this.args;1697    let currentAssertionRule = this.assertionRule;1698    let offset = 0;1699    // eslint-disable-next-line no-labels1700    OUTER: while (true) {1701      if (1702        currentAssertionRule.args.length > 1 &&1703        isAssertionArg(1704          currentAssertionRule.args[currentAssertionRule.args.length - 2]1705        )1706      ) {1707        assertionIndices.push(offset + currentAssertionRule.args.length - 2);1708        const suffixAssertions = findSuffixAssertions(1709          args[offset + currentAssertionRule.args.length - 2],1710          this1711        );1712        if (suffixAssertions) {1713          for (let i = 0; i < suffixAssertions.length; i += 1) {1714            if (suffixAssertions[i].args.some(isAssertionArg)) {1715              offset += currentAssertionRule.args.length - 1;1716              currentAssertionRule = suffixAssertions[i];1717              // eslint-disable-next-line no-labels1718              continue OUTER;1719            }1720          }1721        }1722      }1723      // No further assertions found,1724      break;1725    }1726    this._assertionIndices = assertionIndices;1727  }1728  return this._assertionIndices;1729};1730Object.defineProperty(expectPrototype, 'subjectType', {1731  enumerable: true,1732  get() {1733    this._assertWrappedExpect();1734    return this._getSubjectType();1735  },1736});1737Object.defineProperty(expectPrototype, 'argTypes', {1738  enumerable: true,1739  get() {1740    this._assertWrappedExpect();1741    return this._getArgTypes();1742  },1743});1744function createTopLevelExpect(1745  {1746    assertions = {},1747    typeByName = { any: anyType },1748    types = [anyType],1749    output,1750    format = magicpen.defaultFormat,1751    installedPlugins = [],1752  } = {},1753  parentExpect1754) {1755  const expect = function (...args) {1756    return expect._expect(new Context(), args);1757  };1758  if (parentExpect) {...

index.js

Source:index.js

1const expect = require('./createTopLevelExpect')()2  .use(require('./styles'))3  .use(require('./types'))4  .use(require('./assertions'))5  .freeze();6// Add an inspect method to all the promises we return that will make the REPL, console.log, and util.inspect render it nicely in node.js:7require('unexpected-bluebird').prototype[require('./nodeJsCustomInspect')] =8  function () {9    return expect10      .createOutput(require('magicpen').defaultFormat)11      .appendInspected(this)12      .toString();13  };...

Using AI Code Generation

1const expect = require('unexpected')2  .clone()3  .use(require('unexpected-sinon'));4const expect = require('unexpected')5  .clone()6  .use(require('unexpected-sinon'));7const expect = require('unexpected')8  .clone()9  .use(require('unexpected-sinon'));10const expect = require('unexpected')11  .clone()12  .use(require('unexpected-sinon'));13const expect = require('unexpected')14  .clone()15  .use(require('unexpected-sinon'));16const expect = require('unexpected')17  .clone()18  .use(require('unexpected-sinon'));19const expect = require('unexpected')20  .clone()21  .use(require('unexpected-sinon'));22const expect = require('unexpected')23  .clone()24  .use(require('unexpected-sinon'));25const expect = require('unexpected')26  .clone()27  .use(require('unexpected-sinon'));28'use strict';29const expect = require('unexpected')30  .clone()31  .use(require('unexpected-sinon'));32const expect = require('unexpected')33  .clone()34  .use(require('unexpected-sinon'));35describe('Test suite', () => {36  it('should pass', () => {37    expect(1, 'to be', 1);38  });39});

Using AI Code Generation

1var expect = require('unexpected')2  .clone()3  .use(require('unexpected-mitm'));4var http = require('http');5describe('http', function () {6  it('should work', function () {7    return expect(8      function (cb) {9      },10      {11      },12    );13  });14});

Using AI Code Generation

1const expect = require('unexpected');2const test = require('unexpected').clone().use(require('unexpected-sinon'));3const sinon = require('sinon');4const fs = require('fs');5const { readFile } = require('fs');6const { promisify } = require('util');7const readFileAsync = promisify(readFile);8const { readFile: readFileCallback } = require('fs');9const { promisify: promisifyCallback } = require('util');10const readFileCallbackAsync = promisifyCallback(readFileCallback);11const { readFileWithCallback, readFileWithPromise } = require('./index');12describe('readFileWithCallback', () => {13  it('should read file content', done => {14    const expected = 'Hello World!';15    const filePath = './file.txt';16    const readFileStub = sinon.stub(fs, 'readFile').callsFake((path, options, callback) => {17      callback(null, expected);18    });19    readFileWithCallback(filePath, (err, content) => {20      expect(readFileStub, 'was called with', filePath, 'utf8');21      expect(content, 'to equal', expected);22      done();23    });24  });25  it('should throw error when file does not exist', done => {26    const expected = 'Hello World!';27    const filePath = './file.txt';28    const readFileStub = sinon.stub(fs, 'readFile').callsFake((path, options, callback) => {29      callback(new Error('File does not exist'), null);30    });31    readFileWithCallback(filePath, (err, content) => {32      expect(readFileStub, 'was called with', filePath, 'utf8');33      expect(err, 'to equal', new Error('File does not exist'));34      done();35    });36  });37});38describe('readFileWithPromise', () => {39  it('should read file content', async () => {40    const expected = 'Hello World!';41    const filePath = './file.txt';42    const readFileStub = sinon.stub(fs, 'readFile').callsFake((path, options, callback) => {43      callback(null, expected);44    });45    const content = await readFileWithPromise(filePath);46    expect(readFileStub, 'was called with', filePath, 'utf8');47    expect(content, 'to

Using AI Code Generation

1const expect = require('unexpected').clone().use(require('unexpected-sinon'));2const sinon = require('sinon');3const expect2 = expect.createTopLevelExpect();4const spy = sinon.spy();5expect2(spy, 'was not called');6expect2(spy, 'was not called');7expect2(spy, 'was not called');8expect2(spy, 'was not called');9expect2(spy, 'was not called');10expect2(spy, 'was not called');11    at expect2 (/Users/andrew/Projects/unexpected-sinon/node_modules/unexpected/lib/Unexpected.js:252:21)12    at Object.<anonymous> (/Users/andrew/Projects/unexpected-sinon/test.js:7:5)13    at Module._compile (internal/modules/cjs/loader.js:1138:30)14    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1158:10)15    at Module.load (internal/modules/cjs/loader.js:986:32)16    at Function.Module._load (internal/modules/cjs/loader.js:879:14)17    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)

Using AI Code Generation

1var expect = require('unexpected')2  .clone()3  .use(require('unexpected-dom'))4  .use(require('unexpected-sinon'));5expect.addAssertion('<string> to have a class <string>', function (expect, subject, value) {6  return expect(subject, 'to have attributes', {7    class: expect.it('to contain', value)8  });9});10expect.addAssertion('<string> to have an id <string>', function (expect, subject, value) {11  return expect(subject, 'to have attributes', {12  });13});14expect.addAssertion('<string> to contain <string>', function (expect, subject, value) {15  return expect(subject, 'to contain', value);16});17expect.addAssertion('<string> to have a length of <number>', function (expect, subject, value) {18  return expect(subject, 'to have length', value);19});20expect.addAssertion('<string> to be visible', function (expect, subject) {21  return expect(subject, 'to have attributes', {22    class: expect.it('to contain', 'visible')23  });24});25expect.addAssertion('<string> to be invisible', function (expect, subject) {26  return expect(subject, 'to have attributes', {27    class: expect.it('to contain', 'invisible')28  });29});30expect.addAssertion('<string> to be disabled', function (expect, subject) {31  return expect(subject, 'to have attributes', {32  });33});34expect.addAssertion('<string> to be enabled', function (expect, subject) {35  return expect(subject, 'not to have attributes', {36  });37});38expect.addAssertion('<string> to be checked', function (expect, subject) {39  return expect(subject, 'to have attributes', {40  });41});42expect.addAssertion('<string> to be unchecked', function (expect, subject) {43  return expect(subject, 'not to have attributes', {

Using AI Code Generation

1var expect = require('unexpected')2  .clone()3  .use(require('unexpected-mitm'));4var expect = require('unexpected')5  .clone()6  .use(require('unexpected-mitm'));7var expect = require('unexpected')8  .clone()9  .use(require('unexpected-mitm'));10var expect = require('unexpected')11  .clone()12  .use(require('unexpected-mitm'));13var expect = require('unexpected')14  .clone()15  .use(require('unexpected-mitm'));16var expect = require('unexpected')17  .clone()18  .use(require('unexpected-mitm'));19var expect = require('unexpected')20  .clone()21  .use(require('unexpected-mitm'));22var expect = require('unexpected')23  .clone()24  .use(require('unexpected-mitm'));25var expect = require('unexpected')26  .clone()27  .use(require('unexpected-mitm'));

Using AI Code Generation

1const expect = require('unexpected')2  .clone()3  .use(require('unexpected-dom'));4it('should render', () => {5  return expect(6  );7});8const expect = require('unexpected')9  .clone()10  .use(require('unexpected-react-shallow'));11it('should render', () => {12  return expect(13  );14});

Using AI Code Generation

1const expect = require('unexpected')2  .clone()3  .use(require('unexpected-mitm'))4  .createTopLevelExpect({ output: { styles: { text: { pass: { color: 'green' } } } } });5describe('http request', function() {6  it('should return an object with the correct properties', function() {7    return expect(8      {9        headers: {10        }11      },12      {13        response: {14          headers: {15          },16          body: {17          }18        }19      },20      {21        headers: {22        },23        body: {24        }25      }26    );27  });28});

Using AI Code Generation

1const expect = require('unexpected').createTopLevelExpect();2expect([1,2,3], 'to be an array');3expect({a:1, b:2}, 'to be an object');4expect('Hello World', 'to be a string');5expect(3.14159, 'to be a number');6expect(true, 'to be a boolean');7expect(null, 'to be null');8expect(undefined, 'to be undefined');9expect(function(){}, 'to be a function');10expect(Symbol(), 'to be a symbol');11expect(new Date(), 'to be a date');12expect(/a-z/, 'to be a regexp');13expect(new Error(), 'to be an error');14expect(new Promise(function(){}), 'to be a promise');15expect(new Set(), 'to be a set');16expect(new Map(), 'to be a map');

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.