Function toEqual

packages/expect/src/matchers.ts:616–654

(received: unknown, expected: unknown)

  },

  toEqual(received: unknown, expected: unknown) {
    const matcherName = class="st">'toEqual';
    const options: MatcherHintOptions = {
      comment: class="st">'deep equality',
      isNot: this.isNot,
      promise: this.promise,
    };

    const pass = equals(received, expected, [
      ...this.customTesters,
      iterableEquality,
    ]);

    const message = pass
      ? () =>
          class="cm">// eslint-disable-next-line prefer-template
          matcherHint(matcherName, undefined, undefined, options) +
          class="st">'\n\n' +
          `Expected: not ${printExpected(expected)}\n` +
          (stringify(expected) === stringify(received)
            ? class="st">''
            : `Received:     ${printReceived(received)}`)
      : () =>
          class="cm">// eslint-disable-next-line prefer-template
          matcherHint(matcherName, undefined, undefined, options) +
          class="st">'\n\n' +
          printDiffOrStringify(
            expected,
            received,
            EXPECTED_LABEL,
            RECEIVED_LABEL,
            isExpand(this.expand),
          );

    class="cm">// Passing the actual and expected objects so that a custom reporter
    class="cm">// could access them, for example in order to display a custom visual diff,
    class="cm">// or create a different error message
    return {actual: received, expected, message, name: matcherName, pass};
  },

  toHaveLength(received: any, expected: number) {
    const matcherName = class="st">'toHaveLength';