Function checkHostElement

src/matchers/utils.ts:47–55

(
  instance: TestInstance | null | undefined,
  matcherFn: jest.CustomMatcher,
  context: jest.MatcherContext,
)

 * @param context Jest matcher context used for formatting error.
 */
export function checkHostElement(
  instance: TestInstance | null | undefined,
  matcherFn: jest.CustomMatcher,
  context: jest.MatcherContext,
): asserts instance is TestInstance {
  if (!isTestInstance(instance)) {
    throw new HostElementTypeError(instance, matcherFn, context);
  }
}

export function formatMessage(
  matcher: string,