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Code Editor : assertion_error.js

// Currently in sync with Node.js lib/internal/assert/assertion_error.js
// https://github.com/nodejs/node/commit/0817840f775032169ddd70c85ac059f18ffcc81c
'use strict';

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _isNativeFunction(fn) { return Function.toString.call(fn).indexOf("[native code]") !== -1; }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

var _require = require('util/'),
    inspect = _require.inspect;

var _require2 = require('../errors'),
    ERR_INVALID_ARG_TYPE = _require2.codes.ERR_INVALID_ARG_TYPE; // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith

function endsWith(str, search, this_len) {
  if (this_len === undefined || this_len > str.length) {
    this_len = str.length;
  }

return str.substring(this_len - search.length, this_len) === search;
} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat

function repeat(str, count) {
  count = Math.floor(count);
  if (str.length == 0 || count == 0) return '';
  var maxCount = str.length * count;
  count = Math.floor(Math.log(count) / Math.log(2));

while (count) {
    str += str;
    count--;
  }

str += str.substring(0, maxCount - str.length);
  return str;
}

var blue = '';
var green = '';
var red = '';
var white = '';
var kReadableOperator = {
  deepStrictEqual: 'Expected values to be strictly deep-equal:',
  strictEqual: 'Expected values to be strictly equal:',
  strictEqualObject: 'Expected "actual" to be reference-equal to "expected":',
  deepEqual: 'Expected values to be loosely deep-equal:',
  equal: 'Expected values to be loosely equal:',
  notDeepStrictEqual: 'Expected "actual" not to be strictly deep-equal to:',
  notStrictEqual: 'Expected "actual" to be strictly unequal to:',
  notStrictEqualObject: 'Expected "actual" not to be reference-equal to "expected":',
  notDeepEqual: 'Expected "actual" not to be loosely deep-equal to:',
  notEqual: 'Expected "actual" to be loosely unequal to:',
  notIdentical: 'Values identical but not reference-equal:'
}; // Comparing short primitives should just show === / !== instead of using the
// diff.

var kMaxShortLength = 10;

function inspectValue(val) {
  // The util.inspect default values could be changed. This makes sure the
  // error messages contain the necessary information nevertheless.
  return inspect(val, {
    compact: false,
    customInspect: false,
    depth: 1000,
    maxArrayLength: Infinity,
    // Assert compares only enumerable properties (with a few exceptions).
    showHidden: false,
    // Having a long line as error is better than wrapping the line for
    // comparison for now.
    // TODO(BridgeAR): `breakLength` should be limited as soon as soon as we
    // have meta information about the inspected properties (i.e., know where
    // in what line the property starts and ends).
    breakLength: Infinity,
    // Assert does not detect proxies currently.
    showProxy: false,
    sorted: true,
    // Inspect getters as we also check them when comparing entries.
    getters: true
  });
}

function createErrDiff(actual, expected, operator) {
  var other = '';
  var res = '';
  var lastPos = 0;
  var end = '';
  var skipped = false;
  var actualInspected = inspectValue(actual);
  var actualLines = actualInspected.split('\n');
  var expectedLines = inspectValue(expected).split('\n');
  var i = 0;
  var indicator = ''; // In case both values are objects explicitly mark them as not reference equal
  // for the `strictEqual` operator.

if (operator === 'strictEqual' && _typeof(actual) === 'object' && _typeof(expected) === 'object' && actual !== null && expected !== null) {
    operator = 'strictEqualObject';
  } // If "actual" and "expected" fit on a single line and they are not strictly
  // equal, check further special handling.

if (actualLines.length === 1 && expectedLines.length === 1 && actualLines[0] !== expectedLines[0]) {
    var inputLength = actualLines[0].length + expectedLines[0].length; // If the character length of "actual" and "expected" together is less than
    // kMaxShortLength and if neither is an object and at least one of them is
    // not `zero`, use the strict equal comparison to visualize the output.

if (inputLength <= kMaxShortLength) {
      if ((_typeof(actual) !== 'object' || actual === null) && (_typeof(expected) !== 'object' || expected === null) && (actual !== 0 || expected !== 0)) {
        // -0 === +0
        return "".concat(kReadableOperator[operator], "\n\n") + "".concat(actualLines[0], " !== ").concat(expectedLines[0], "\n");
      }
    } else if (operator !== 'strictEqualObject') {
      // If the stderr is a tty and the input length is lower than the current
      // columns per line, add a mismatch indicator below the output. If it is
      // not a tty, use a default value of 80 characters.
      var maxLength = process.stderr && process.stderr.isTTY ? process.stderr.columns : 80;

if (inputLength < maxLength) {
        while (actualLines[0][i] === expectedLines[0][i]) {
          i++;
        } // Ignore the first characters.

if (i > 2) {
          // Add position indicator for the first mismatch in case it is a
          // single line and the input length is less than the column length.
          indicator = "\n  ".concat(repeat(' ', i), "^");
          i = 0;
        }
      }
    }
  } // Remove all ending lines that match (this optimizes the output for
  // readability by reducing the number of total changed lines).

var a = actualLines[actualLines.length - 1];
  var b = expectedLines[expectedLines.length - 1];

while (a === b) {
    if (i++ < 2) {
      end = "\n  ".concat(a).concat(end);
    } else {
      other = a;
    }

actualLines.pop();
    expectedLines.pop();
    if (actualLines.length === 0 || expectedLines.length === 0) break;
    a = actualLines[actualLines.length - 1];
    b = expectedLines[expectedLines.length - 1];
  }

var maxLines = Math.max(actualLines.length, expectedLines.length); // Strict equal with identical objects that are not identical by reference.
  // E.g., assert.deepStrictEqual({ a: Symbol() }, { a: Symbol() })

if (maxLines === 0) {
    // We have to get the result again. The lines were all removed before.
    var _actualLines = actualInspected.split('\n'); // Only remove lines in case it makes sense to collapse those.
    // TODO: Accept env to always show the full error.

if (_actualLines.length > 30) {
      _actualLines[26] = "".concat(blue, "...").concat(white);

while (_actualLines.length > 27) {
        _actualLines.pop();
      }
    }

return "".concat(kReadableOperator.notIdentical, "\n\n").concat(_actualLines.join('\n'), "\n");
  }

if (i > 3) {
    end = "\n".concat(blue, "...").concat(white).concat(end);
    skipped = true;
  }

if (other !== '') {
    end = "\n  ".concat(other).concat(end);
    other = '';
  }

var printedLines = 0;
  var msg = kReadableOperator[operator] + "\n".concat(green, "+ actual").concat(white, " ").concat(red, "- expected").concat(white);
  var skippedMsg = " ".concat(blue, "...").concat(white, " Lines skipped");

for (i = 0; i < maxLines; i++) {
    // Only extra expected lines exist
    var cur = i - lastPos;

if (actualLines.length < i + 1) {
      // If the last diverging line is more than one line above and the
      // current line is at least line three, add some of the former lines and
      // also add dots to indicate skipped entries.
      if (cur > 1 && i > 2) {
        if (cur > 4) {
          res += "\n".concat(blue, "...").concat(white);
          skipped = true;
        } else if (cur > 3) {
          res += "\n  ".concat(expectedLines[i - 2]);
          printedLines++;
        }

res += "\n  ".concat(expectedLines[i - 1]);
        printedLines++;
      } // Mark the current line as the last diverging one.

lastPos = i; // Add the expected line to the cache.

other += "\n".concat(red, "-").concat(white, " ").concat(expectedLines[i]);
      printedLines++; // Only extra actual lines exist
    } else if (expectedLines.length < i + 1) {
      // If the last diverging line is more than one line above and the
      // current line is at least line three, add some of the former lines and
      // also add dots to indicate skipped entries.
      if (cur > 1 && i > 2) {
        if (cur > 4) {
          res += "\n".concat(blue, "...").concat(white);
          skipped = true;
        } else if (cur > 3) {
          res += "\n  ".concat(actualLines[i - 2]);
          printedLines++;
        }

res += "\n  ".concat(actualLines[i - 1]);
        printedLines++;
      } // Mark the current line as the last diverging one.

lastPos = i; // Add the actual line to the result.

res += "\n".concat(green, "+").concat(white, " ").concat(actualLines[i]);
      printedLines++; // Lines diverge
    } else {
      var expectedLine = expectedLines[i];
      var actualLine = actualLines[i]; // If the lines diverge, specifically check for lines that only diverge by
      // a trailing comma. In that case it is actually identical and we should
      // mark it as such.

var divergingLines = actualLine !== expectedLine && (!endsWith(actualLine, ',') || actualLine.slice(0, -1) !== expectedLine); // If the expected line has a trailing comma but is otherwise identical,
      // add a comma at the end of the actual line. Otherwise the output could
      // look weird as in:
      //
      //   [
      //     1         // No comma at the end!
      // +   2
      //   ]
      //

if (divergingLines && endsWith(expectedLine, ',') && expectedLine.slice(0, -1) === actualLine) {
        divergingLines = false;
        actualLine += ',';
      }

if (divergingLines) {
        // If the last diverging line is more than one line above and the
        // current line is at least line three, add some of the former lines and
        // also add dots to indicate skipped entries.
        if (cur > 1 && i > 2) {
          if (cur > 4) {
            res += "\n".concat(blue, "...").concat(white);
            skipped = true;
          } else if (cur > 3) {
            res += "\n  ".concat(actualLines[i - 2]);
            printedLines++;
          }

res += "\n  ".concat(actualLines[i - 1]);
          printedLines++;
        } // Mark the current line as the last diverging one.

lastPos = i; // Add the actual line to the result and cache the expected diverging
        // line so consecutive diverging lines show up as +++--- and not +-+-+-.

res += "\n".concat(green, "+").concat(white, " ").concat(actualLine);
        other += "\n".concat(red, "-").concat(white, " ").concat(expectedLine);
        printedLines += 2; // Lines are identical
      } else {
        // Add all cached information to the result before adding other things
        // and reset the cache.
        res += other;
        other = ''; // If the last diverging line is exactly one line above or if it is the
        // very first line, add the line to the result.

if (cur === 1 || i === 0) {
          res += "\n  ".concat(actualLine);
          printedLines++;
        }
      }
    } // Inspected object to big (Show ~20 rows max)

if (printedLines > 20 && i < maxLines - 2) {
      return "".concat(msg).concat(skippedMsg, "\n").concat(res, "\n").concat(blue, "...").concat(white).concat(other, "\n") + "".concat(blue, "...").concat(white);
    }
  }

return "".concat(msg).concat(skipped ? skippedMsg : '', "\n").concat(res).concat(other).concat(end).concat(indicator);
}

var AssertionError = /*#__PURE__*/function (_Error) {
  _inherits(AssertionError, _Error);

var _super = _createSuper(AssertionError);

function AssertionError(options) {
    var _this;

_classCallCheck(this, AssertionError);

if (_typeof(options) !== 'object' || options === null) {
      throw new ERR_INVALID_ARG_TYPE('options', 'Object', options);
    }

var message = options.message,
        operator = options.operator,
        stackStartFn = options.stackStartFn;
    var actual = options.actual,
        expected = options.expected;
    var limit = Error.stackTraceLimit;
    Error.stackTraceLimit = 0;

if (message != null) {
      _this = _super.call(this, String(message));
    } else {
      if (process.stderr && process.stderr.isTTY) {
        // Reset on each call to make sure we handle dynamically set environment
        // variables correct.
        if (process.stderr && process.stderr.getColorDepth && process.stderr.getColorDepth() !== 1) {
          blue = "\x1B[34m";
          green = "\x1B[32m";
          white = "\x1B[39m";
          red = "\x1B[31m";
        } else {
          blue = '';
          green = '';
          white = '';
          red = '';
        }
      } // Prevent the error stack from being visible by duplicating the error
      // in a very close way to the original in case both sides are actually
      // instances of Error.

if (_typeof(actual) === 'object' && actual !== null && _typeof(expected) === 'object' && expected !== null && 'stack' in actual && actual instanceof Error && 'stack' in expected && expected instanceof Error) {
        actual = copyError(actual);
        expected = copyError(expected);
      }

if (operator === 'deepStrictEqual' || operator === 'strictEqual') {
        _this = _super.call(this, createErrDiff(actual, expected, operator));
      } else if (operator === 'notDeepStrictEqual' || operator === 'notStrictEqual') {
        // In case the objects are equal but the operator requires unequal, show
        // the first object and say A equals B
        var base = kReadableOperator[operator];
        var res = inspectValue(actual).split('\n'); // In case "actual" is an object, it should not be reference equal.

if (operator === 'notStrictEqual' && _typeof(actual) === 'object' && actual !== null) {
          base = kReadableOperator.notStrictEqualObject;
        } // Only remove lines in case it makes sense to collapse those.
        // TODO: Accept env to always show the full error.

if (res.length > 30) {
          res[26] = "".concat(blue, "...").concat(white);

while (res.length > 27) {
            res.pop();
          }
        } // Only print a single input.

if (res.length === 1) {
          _this = _super.call(this, "".concat(base, " ").concat(res[0]));
        } else {
          _this = _super.call(this, "".concat(base, "\n\n").concat(res.join('\n'), "\n"));
        }
      } else {
        var _res = inspectValue(actual);

var other = '';
        var knownOperators = kReadableOperator[operator];

if (operator === 'notDeepEqual' || operator === 'notEqual') {
          _res = "".concat(kReadableOperator[operator], "\n\n").concat(_res);

if (_res.length > 1024) {
            _res = "".concat(_res.slice(0, 1021), "...");
          }
        } else {
          other = "".concat(inspectValue(expected));

if (_res.length > 512) {
            _res = "".concat(_res.slice(0, 509), "...");
          }

if (other.length > 512) {
            other = "".concat(other.slice(0, 509), "...");
          }

if (operator === 'deepEqual' || operator === 'equal') {
            _res = "".concat(knownOperators, "\n\n").concat(_res, "\n\nshould equal\n\n");
          } else {
            other = " ".concat(operator, " ").concat(other);
          }
        }

_this = _super.call(this, "".concat(_res).concat(other));
      }
    }

Error.stackTraceLimit = limit;
    _this.generatedMessage = !message;
    Object.defineProperty(_assertThisInitialized(_this), 'name', {
      value: 'AssertionError [ERR_ASSERTION]',
      enumerable: false,
      writable: true,
      configurable: true
    });
    _this.code = 'ERR_ASSERTION';
    _this.actual = actual;
    _this.expected = expected;
    _this.operator = operator;

if (Error.captureStackTrace) {
      // eslint-disable-next-line no-restricted-syntax
      Error.captureStackTrace(_assertThisInitialized(_this), stackStartFn);
    } // Create error message including the error code in the name.

_this.stack; // Reset the name.

_this.name = 'AssertionError';
    return _possibleConstructorReturn(_this);
  }

_createClass(AssertionError, [{
    key: "toString",
    value: function toString() {
      return "".concat(this.name, " [").concat(this.code, "]: ").concat(this.message);
    }
  }, {
    key: inspect.custom,
    value: function value(recurseTimes, ctx) {
      // This limits the `actual` and `expected` property default inspection to
      // the minimum depth. Otherwise those values would be too verbose compared
      // to the actual error message which contains a combined view of these two
      // input values.
      return inspect(this, _objectSpread(_objectSpread({}, ctx), {}, {
        customInspect: false,
        depth: 0
      }));
    }
  }]);

return AssertionError;
}( /*#__PURE__*/_wrapNativeSuper(Error));

module.exports = AssertionError;

${this.title}

Code Editor : assertion_error.js