index.js 16.2 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590
'use strict';

Object.defineProperty(exports, '__esModule', {
  value: true
});
exports.stringify =
  exports.printWithType =
  exports.printReceived =
  exports.printExpected =
  exports.printDiffOrStringify =
  exports.pluralize =
  exports.matcherHint =
  exports.matcherErrorMessage =
  exports.highlightTrailingWhitespace =
  exports.getLabelPrinter =
  exports.ensureNumbers =
  exports.ensureNoExpected =
  exports.ensureExpectedIsNumber =
  exports.ensureExpectedIsNonNegativeInteger =
  exports.ensureActualIsNumber =
  exports.diff =
  exports.SUGGEST_TO_CONTAIN_EQUAL =
  exports.RECEIVED_COLOR =
  exports.INVERTED_COLOR =
  exports.EXPECTED_COLOR =
  exports.DIM_COLOR =
  exports.BOLD_WEIGHT =
    void 0;

var _chalk = _interopRequireDefault(require('chalk'));

var _jestDiff = require('jest-diff');

var _jestGetType = require('jest-get-type');

var _prettyFormat = require('pretty-format');

var _Replaceable = _interopRequireDefault(require('./Replaceable'));

var _deepCyclicCopyReplaceable = _interopRequireDefault(
  require('./deepCyclicCopyReplaceable')
);

function _interopRequireDefault(obj) {
  return obj && obj.__esModule ? obj : {default: obj};
}

/**
 * Copyright (c) Facebook, Inc. and its affiliates. 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.
 */

/* eslint-disable local/ban-types-eventually */
const {
  AsymmetricMatcher,
  DOMCollection,
  DOMElement,
  Immutable,
  ReactElement,
  ReactTestComponent
} = _prettyFormat.plugins;
const PLUGINS = [
  ReactTestComponent,
  ReactElement,
  DOMElement,
  DOMCollection,
  Immutable,
  AsymmetricMatcher
];
const EXPECTED_COLOR = _chalk.default.green;
exports.EXPECTED_COLOR = EXPECTED_COLOR;
const RECEIVED_COLOR = _chalk.default.red;
exports.RECEIVED_COLOR = RECEIVED_COLOR;
const INVERTED_COLOR = _chalk.default.inverse;
exports.INVERTED_COLOR = INVERTED_COLOR;
const BOLD_WEIGHT = _chalk.default.bold;
exports.BOLD_WEIGHT = BOLD_WEIGHT;
const DIM_COLOR = _chalk.default.dim;
exports.DIM_COLOR = DIM_COLOR;
const MULTILINE_REGEXP = /\n/;
const SPACE_SYMBOL = '\u{00B7}'; // middle dot

const NUMBERS = [
  'zero',
  'one',
  'two',
  'three',
  'four',
  'five',
  'six',
  'seven',
  'eight',
  'nine',
  'ten',
  'eleven',
  'twelve',
  'thirteen'
];

const SUGGEST_TO_CONTAIN_EQUAL = _chalk.default.dim(
  'Looks like you wanted to test for object/array equality with the stricter `toContain` matcher. You probably need to use `toContainEqual` instead.'
);

exports.SUGGEST_TO_CONTAIN_EQUAL = SUGGEST_TO_CONTAIN_EQUAL;

const stringify = (object, maxDepth = 10) => {
  const MAX_LENGTH = 10000;
  let result;

  try {
    result = (0, _prettyFormat.format)(object, {
      maxDepth,
      min: true,
      plugins: PLUGINS
    });
  } catch {
    result = (0, _prettyFormat.format)(object, {
      callToJSON: false,
      maxDepth,
      min: true,
      plugins: PLUGINS
    });
  }

  return result.length >= MAX_LENGTH && maxDepth > 1
    ? stringify(object, Math.floor(maxDepth / 2))
    : result;
};

exports.stringify = stringify;

const highlightTrailingWhitespace = text =>
  text.replace(/\s+$/gm, _chalk.default.inverse('$&')); // Instead of inverse highlight which now implies a change,
// replace common spaces with middle dot at the end of any line.

exports.highlightTrailingWhitespace = highlightTrailingWhitespace;

const replaceTrailingSpaces = text =>
  text.replace(/\s+$/gm, spaces => SPACE_SYMBOL.repeat(spaces.length));

const printReceived = object =>
  RECEIVED_COLOR(replaceTrailingSpaces(stringify(object)));

exports.printReceived = printReceived;

const printExpected = value =>
  EXPECTED_COLOR(replaceTrailingSpaces(stringify(value)));

exports.printExpected = printExpected;

const printWithType = (
  name,
  value,
  print // printExpected or printReceived
) => {
  const type = (0, _jestGetType.getType)(value);
  const hasType =
    type !== 'null' && type !== 'undefined'
      ? `${name} has type:  ${type}\n`
      : '';
  const hasValue = `${name} has value: ${print(value)}`;
  return hasType + hasValue;
};

exports.printWithType = printWithType;

const ensureNoExpected = (expected, matcherName, options) => {
  if (typeof expected !== 'undefined') {
    // Prepend maybe not only for backward compatibility.
    const matcherString = (options ? '' : '[.not]') + matcherName;
    throw new Error(
      matcherErrorMessage(
        matcherHint(matcherString, undefined, '', options), // Because expected is omitted in hint above,
        // expected is black instead of green in message below.
        'this matcher must not have an expected argument',
        printWithType('Expected', expected, printExpected)
      )
    );
  }
};
/**
 * Ensures that `actual` is of type `number | bigint`
 */

exports.ensureNoExpected = ensureNoExpected;

const ensureActualIsNumber = (actual, matcherName, options) => {
  if (typeof actual !== 'number' && typeof actual !== 'bigint') {
    // Prepend maybe not only for backward compatibility.
    const matcherString = (options ? '' : '[.not]') + matcherName;
    throw new Error(
      matcherErrorMessage(
        matcherHint(matcherString, undefined, undefined, options),
        `${RECEIVED_COLOR('received')} value must be a number or bigint`,
        printWithType('Received', actual, printReceived)
      )
    );
  }
};
/**
 * Ensures that `expected` is of type `number | bigint`
 */

exports.ensureActualIsNumber = ensureActualIsNumber;

const ensureExpectedIsNumber = (expected, matcherName, options) => {
  if (typeof expected !== 'number' && typeof expected !== 'bigint') {
    // Prepend maybe not only for backward compatibility.
    const matcherString = (options ? '' : '[.not]') + matcherName;
    throw new Error(
      matcherErrorMessage(
        matcherHint(matcherString, undefined, undefined, options),
        `${EXPECTED_COLOR('expected')} value must be a number or bigint`,
        printWithType('Expected', expected, printExpected)
      )
    );
  }
};
/**
 * Ensures that `actual` & `expected` are of type `number | bigint`
 */

exports.ensureExpectedIsNumber = ensureExpectedIsNumber;

const ensureNumbers = (actual, expected, matcherName, options) => {
  ensureActualIsNumber(actual, matcherName, options);
  ensureExpectedIsNumber(expected, matcherName, options);
};

exports.ensureNumbers = ensureNumbers;

const ensureExpectedIsNonNegativeInteger = (expected, matcherName, options) => {
  if (
    typeof expected !== 'number' ||
    !Number.isSafeInteger(expected) ||
    expected < 0
  ) {
    // Prepend maybe not only for backward compatibility.
    const matcherString = (options ? '' : '[.not]') + matcherName;
    throw new Error(
      matcherErrorMessage(
        matcherHint(matcherString, undefined, undefined, options),
        `${EXPECTED_COLOR('expected')} value must be a non-negative integer`,
        printWithType('Expected', expected, printExpected)
      )
    );
  }
}; // Given array of diffs, return concatenated string:
// * include common substrings
// * exclude change substrings which have opposite op
// * include change substrings which have argument op
//   with inverse highlight only if there is a common substring

exports.ensureExpectedIsNonNegativeInteger = ensureExpectedIsNonNegativeInteger;

const getCommonAndChangedSubstrings = (diffs, op, hasCommonDiff) =>
  diffs.reduce(
    (reduced, diff) =>
      reduced +
      (diff[0] === _jestDiff.DIFF_EQUAL
        ? diff[1]
        : diff[0] !== op
        ? ''
        : hasCommonDiff
        ? INVERTED_COLOR(diff[1])
        : diff[1]),
    ''
  );

const isLineDiffable = (expected, received) => {
  const expectedType = (0, _jestGetType.getType)(expected);
  const receivedType = (0, _jestGetType.getType)(received);

  if (expectedType !== receivedType) {
    return false;
  }

  if ((0, _jestGetType.isPrimitive)(expected)) {
    // Print generic line diff for strings only:
    // * if neither string is empty
    // * if either string has more than one line
    return (
      typeof expected === 'string' &&
      typeof received === 'string' &&
      expected.length !== 0 &&
      received.length !== 0 &&
      (MULTILINE_REGEXP.test(expected) || MULTILINE_REGEXP.test(received))
    );
  }

  if (
    expectedType === 'date' ||
    expectedType === 'function' ||
    expectedType === 'regexp'
  ) {
    return false;
  }

  if (expected instanceof Error && received instanceof Error) {
    return false;
  }

  if (
    receivedType === 'object' &&
    typeof received.asymmetricMatch === 'function'
  ) {
    return false;
  }

  return true;
};

const MAX_DIFF_STRING_LENGTH = 20000;

const printDiffOrStringify = (
  expected,
  received,
  expectedLabel,
  receivedLabel,
  expand // CLI options: true if `--expand` or false if `--no-expand`
) => {
  if (
    typeof expected === 'string' &&
    typeof received === 'string' &&
    expected.length !== 0 &&
    received.length !== 0 &&
    expected.length <= MAX_DIFF_STRING_LENGTH &&
    received.length <= MAX_DIFF_STRING_LENGTH &&
    expected !== received
  ) {
    if (expected.includes('\n') || received.includes('\n')) {
      return (0, _jestDiff.diffStringsUnified)(expected, received, {
        aAnnotation: expectedLabel,
        bAnnotation: receivedLabel,
        changeLineTrailingSpaceColor: _chalk.default.bgYellow,
        commonLineTrailingSpaceColor: _chalk.default.bgYellow,
        emptyFirstOrLastLinePlaceholder: '↵',
        // U+21B5
        expand,
        includeChangeCounts: true
      });
    }

    const diffs = (0, _jestDiff.diffStringsRaw)(expected, received, true);
    const hasCommonDiff = diffs.some(diff => diff[0] === _jestDiff.DIFF_EQUAL);
    const printLabel = getLabelPrinter(expectedLabel, receivedLabel);
    const expectedLine =
      printLabel(expectedLabel) +
      printExpected(
        getCommonAndChangedSubstrings(
          diffs,
          _jestDiff.DIFF_DELETE,
          hasCommonDiff
        )
      );
    const receivedLine =
      printLabel(receivedLabel) +
      printReceived(
        getCommonAndChangedSubstrings(
          diffs,
          _jestDiff.DIFF_INSERT,
          hasCommonDiff
        )
      );
    return expectedLine + '\n' + receivedLine;
  }

  if (isLineDiffable(expected, received)) {
    const {replacedExpected, replacedReceived} =
      replaceMatchedToAsymmetricMatcher(
        (0, _deepCyclicCopyReplaceable.default)(expected),
        (0, _deepCyclicCopyReplaceable.default)(received),
        [],
        []
      );
    const difference = (0, _jestDiff.diff)(replacedExpected, replacedReceived, {
      aAnnotation: expectedLabel,
      bAnnotation: receivedLabel,
      expand,
      includeChangeCounts: true
    });

    if (
      typeof difference === 'string' &&
      difference.includes('- ' + expectedLabel) &&
      difference.includes('+ ' + receivedLabel)
    ) {
      return difference;
    }
  }

  const printLabel = getLabelPrinter(expectedLabel, receivedLabel);
  const expectedLine = printLabel(expectedLabel) + printExpected(expected);
  const receivedLine =
    printLabel(receivedLabel) +
    (stringify(expected) === stringify(received)
      ? 'serializes to the same string'
      : printReceived(received));
  return expectedLine + '\n' + receivedLine;
}; // Sometimes, e.g. when comparing two numbers, the output from jest-diff
// does not contain more information than the `Expected:` / `Received:` already gives.
// In those cases, we do not print a diff to make the output shorter and not redundant.

exports.printDiffOrStringify = printDiffOrStringify;

const shouldPrintDiff = (actual, expected) => {
  if (typeof actual === 'number' && typeof expected === 'number') {
    return false;
  }

  if (typeof actual === 'bigint' && typeof expected === 'bigint') {
    return false;
  }

  if (typeof actual === 'boolean' && typeof expected === 'boolean') {
    return false;
  }

  return true;
};

function replaceMatchedToAsymmetricMatcher(
  replacedExpected,
  replacedReceived,
  expectedCycles,
  receivedCycles
) {
  if (!_Replaceable.default.isReplaceable(replacedExpected, replacedReceived)) {
    return {
      replacedExpected,
      replacedReceived
    };
  }

  if (
    expectedCycles.includes(replacedExpected) ||
    receivedCycles.includes(replacedReceived)
  ) {
    return {
      replacedExpected,
      replacedReceived
    };
  }

  expectedCycles.push(replacedExpected);
  receivedCycles.push(replacedReceived);
  const expectedReplaceable = new _Replaceable.default(replacedExpected);
  const receivedReplaceable = new _Replaceable.default(replacedReceived);
  expectedReplaceable.forEach((expectedValue, key) => {
    const receivedValue = receivedReplaceable.get(key);

    if (isAsymmetricMatcher(expectedValue)) {
      if (expectedValue.asymmetricMatch(receivedValue)) {
        receivedReplaceable.set(key, expectedValue);
      }
    } else if (isAsymmetricMatcher(receivedValue)) {
      if (receivedValue.asymmetricMatch(expectedValue)) {
        expectedReplaceable.set(key, receivedValue);
      }
    } else if (
      _Replaceable.default.isReplaceable(expectedValue, receivedValue)
    ) {
      const replaced = replaceMatchedToAsymmetricMatcher(
        expectedValue,
        receivedValue,
        expectedCycles,
        receivedCycles
      );
      expectedReplaceable.set(key, replaced.replacedExpected);
      receivedReplaceable.set(key, replaced.replacedReceived);
    }
  });
  return {
    replacedExpected: expectedReplaceable.object,
    replacedReceived: receivedReplaceable.object
  };
}

function isAsymmetricMatcher(data) {
  const type = (0, _jestGetType.getType)(data);
  return type === 'object' && typeof data.asymmetricMatch === 'function';
}

const diff = (a, b, options) =>
  shouldPrintDiff(a, b) ? (0, _jestDiff.diff)(a, b, options) : null;

exports.diff = diff;

const pluralize = (word, count) =>
  (NUMBERS[count] || count) + ' ' + word + (count === 1 ? '' : 's'); // To display lines of labeled values as two columns with monospace alignment:
// given the strings which will describe the values,
// return function which given each string, returns the label:
// string, colon, space, and enough padding spaces to align the value.

exports.pluralize = pluralize;

const getLabelPrinter = (...strings) => {
  const maxLength = strings.reduce(
    (max, string) => (string.length > max ? string.length : max),
    0
  );
  return string => `${string}: ${' '.repeat(maxLength - string.length)}`;
};

exports.getLabelPrinter = getLabelPrinter;

const matcherErrorMessage = (
  hint,
  generic,
  specific // incorrect value returned from call to printWithType
) =>
  `${hint}\n\n${_chalk.default.bold('Matcher error')}: ${generic}${
    typeof specific === 'string' ? '\n\n' + specific : ''
  }`; // Display assertion for the report when a test fails.
// New format: rejects/resolves, not, and matcher name have black color
// Old format: matcher name has dim color

exports.matcherErrorMessage = matcherErrorMessage;

const matcherHint = (
  matcherName,
  received = 'received',
  expected = 'expected',
  options = {}
) => {
  const {
    comment = '',
    expectedColor = EXPECTED_COLOR,
    isDirectExpectCall = false,
    // seems redundant with received === ''
    isNot = false,
    promise = '',
    receivedColor = RECEIVED_COLOR,
    secondArgument = '',
    secondArgumentColor = EXPECTED_COLOR
  } = options;
  let hint = '';
  let dimString = 'expect'; // concatenate adjacent dim substrings

  if (!isDirectExpectCall && received !== '') {
    hint += DIM_COLOR(dimString + '(') + receivedColor(received);
    dimString = ')';
  }

  if (promise !== '') {
    hint += DIM_COLOR(dimString + '.') + promise;
    dimString = '';
  }

  if (isNot) {
    hint += DIM_COLOR(dimString + '.') + 'not';
    dimString = '';
  }

  if (matcherName.includes('.')) {
    // Old format: for backward compatibility,
    // especially without promise or isNot options
    dimString += matcherName;
  } else {
    // New format: omit period from matcherName arg
    hint += DIM_COLOR(dimString + '.') + matcherName;
    dimString = '';
  }

  if (expected === '') {
    dimString += '()';
  } else {
    hint += DIM_COLOR(dimString + '(') + expectedColor(expected);

    if (secondArgument) {
      hint += DIM_COLOR(', ') + secondArgumentColor(secondArgument);
    }

    dimString = ')';
  }

  if (comment !== '') {
    dimString += ' // ' + comment;
  }

  if (dimString !== '') {
    hint += DIM_COLOR(dimString);
  }

  return hint;
};

exports.matcherHint = matcherHint;