failures.test.js

/**
 * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow
 */

const path = require('path');
const skipOnWindows = require('../../scripts/skip_on_windows');
const {extractSummary} = require('../utils');
const runJest = require('../runJest');

const dir = path.resolve(__dirname, '../failures');

const normalizeDots = text => text.replace(/\.{1,}$/gm, '.');

skipOnWindows.suite();

const cleanupStackTrace = stderr => {
  const STACK_REGEXP = /^.*at.*(setup-jest-globals|extractExpectedAssertionsErrors).*\n/gm;
  if (!STACK_REGEXP.test(stderr)) {
    throw new Error(
      `
      This function is used to remove inconsistent stack traces between
      jest-jasmine2 and jest-circus. If you see this error, that means the
      stack traces are no longer inconsistent and this function can be
      safely removed.

      output:
      ${stderr}
    `,
    );
  }

  return (
    stderr
      .replace(STACK_REGEXP, '')
      // Also remove trailing whitespace.
      .replace(/\s+$/gm, '')
  );
};

test('not throwing Error objects', () => {
  let stderr;
  stderr = runJest(dir, ['throw_number.test.js']).stderr;
  expect(extractSummary(stderr).rest).toMatchSnapshot();
  stderr = runJest(dir, ['throw_string.test.js']).stderr;
  expect(extractSummary(stderr).rest).toMatchSnapshot();
  stderr = runJest(dir, ['throw_object.test.js']).stderr;
  expect(extractSummary(stderr).rest).toMatchSnapshot();
  stderr = runJest(dir, ['assertion_count.test.js']).stderr;
  expect(extractSummary(cleanupStackTrace(stderr)).rest).toMatchSnapshot();
});

test('works with node assert', () => {
  const {stderr} = runJest(dir, ['node_assertion_error.test.js']);
  let summary = normalizeDots(extractSummary(stderr).rest);

  // Node 9 started to include the error for `doesNotThrow`
  // https://github.com/nodejs/node/pull/12167
  if (Number(process.versions.node.split('.')[0]) >= 9) {
    expect(summary).toContain(`
    assert.doesNotThrow(function)
    
    Expected the function not to throw an error.
    Instead, it threw:
      [Error: err!]
    
    Message:
      Got unwanted exception.
    err!
    err!
      
      at __tests__/node_assertion_error.test.js:71:10
`);

    summary = summary.replace(
      `Message:
      Got unwanted exception.
    err!
    err!
`,
      `Message:
      Got unwanted exception.
`,
    );
  }

  expect(summary).toMatchSnapshot();
});