Function expectError

packages/compiler/test/expression_parser/parser_spec.ts:1829–1845

(ast: {errors: ParseError[]}, message: string, errorCount?: number)

}

function expectError(ast: {errors: ParseError[]}, message: string, errorCount?: number) {
  if (errorCount != null) {
    expect(ast.errors.length).toBe(errorCount);
  } else {
    expect(ast.errors.length).toBeGreaterThan(0);
  }

  for (const error of ast.errors) {
    if (error.msg.indexOf(message) >= 0) {
      return;
    }
  }
  const errMsgs = ast.errors.map((err) => err.msg).join('\n');
  throw Error(
    `Expected an error containing "${message}" to be reported, but got the errors:\n` + errMsgs,
  );
}

function expectActionError(text: string, message: string, errorCount?: number) {
  expectError(validate(parseAction(text)), message, errorCount);