LibTest/async/Stream/handleError_A02_t01.test.dart

// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

/// @assertion Stream<T> handleError(Function onError, {bool test(error)})
/// If test is omitted, every error is considered matching.
/// @description Checks that if [test] is omitted, every error is intercepted
/// @author a.semenov@unipro.ru

library handleError_A02_t01;

import "dart:async";
import "../../../Utils/expect.dart";

void check(Stream s, List expectedData, List interceptedErrors) {
  List actualData = [];
  List actualErrors = [];
  List actualHandledErrors = [];
  asyncStart();
  s.handleError((error) => actualHandledErrors.add(error)).listen((data) {
    actualData.add(data);
  }, onError: (error) {
    actualErrors.add(error);
  }, onDone: () {
    Expect.listEquals(expectedData, actualData);
    Expect.listEquals(interceptedErrors, actualHandledErrors);
    Expect.listEquals([], actualErrors);
    asyncEnd();
  });
}

void test(CreateStreamWithErrorsFunction create) {
  check(create([], defaultValue: 42), [], []);
  check(create([], isError: (x) => true, defaultValue: 42), [], []);

  check(create([1, 2, 3, 4], defaultValue: 42), [1, 2, 3, 4], []);
  check(create([1, 2, 3, 4], isError: (x) => true, defaultValue: 42),
      [], [1, 2, 3, 4]);
  check(create([1, 2, 3, 4], isError: (x) => x.isEven, defaultValue: 42),
      [1, 3], [2, 4]);
  check(create([null, "2", -3, 4.0, []], isError: (x) => x is num,
      defaultValue: 42), [null, "2", []], [-3, 4.0]);
}