Function printConstructorName

packages/expect/src/print.ts:120–134

(
  label: string,
  constructor: Function,
  isNot: boolean,
  isExpected: boolean,
)

    : `${printConstructorName(label, received, false, false)}\n`;

const printConstructorName = (
  label: string,
  constructor: Function,
  isNot: boolean,
  isExpected: boolean,
): string =>
  typeof constructor.name === 'string'
    ? constructor.name.length === 0
      ? `${label} name is an empty string`
      : `${label}: ${isNot ? (isExpected ? 'not ' : '    ') : ''}${
          isExpected
            ? EXPECTED_COLOR(constructor.name)
            : RECEIVED_COLOR(constructor.name)
        }`
    : `${label} name is not a string`;