Function ensureNoExpected

packages/jest-matcher-utils/src/index.ts:155–173

(
  expected: unknown,
  matcherName: string,
  options?: MatcherHintOptions,
)

}

export const ensureNoExpected = (
  expected: unknown,
  matcherName: string,
  options?: MatcherHintOptions,
): void => {
  if (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`