Function getLabelPrinter

packages/jest-matcher-utils/src/index.ts:503–510

(...strings: Array<string>)

type PrintLabel = (string: string) => string;

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

export const matcherErrorMessage = (
  hint: string, // assertion returned from call to matcherHint