Method asymmetricMatch

packages/expect/src/asymmetricMatchers.ts:198–217

(other: unknown)

  }

  asymmetricMatch(other: unknown) {
    if (!Array.isArray(this.sample)) {
      throw new TypeError(
        `You must provide an array to ${this.toString()}, not '${typeof this
          .sample}'.`,
      );
    }

    const matcherContext = this.getMatcherContext();
    const result =
      this.sample.length === 0 ||
      (Array.isArray(other) &&
        this.sample.every(item =>
          other.some(another =>
            equals(item, another, matcherContext.customTesters),
          ),
        ));

    return this.inverse ? !result : result;
  }

  toString() {
    return `Array${this.inverse ? 'Not' : ''}Containing`;