riverpod_test 0.1.4

A testing library which makes it easy to test providers. Built to be used with the riverpod package.

---

Package

Package is a port of felangel's bloc_test, modified to work with Riverpod Providers.
Increase code coverage by testing all riverpod providers.

Installation

For a Flutter project:

flutter pub add --dev riverpod_test

For a Dart project:

dart pub add --dev riverpod_test

Usage

testProvider

import 'package:riverpod_test.dart';

testProvider(
  'expect [0]',
  provider: counterProvider,
  expect: () => [0],
);

final counterProvider = Provider<int>((ref) => 0);

testNotifier

testNotifier(
  'expect [2] when increment is called twice and skip: 1',
  provider: counterNotifierProvider,
  act: (notifier) => notifier
      ..increment()
      ..increment(),
  skip: 1,
  expect: () => [2],
);

final counterNotifierProvider =
    NotifierProvider<CounterNotifier, int>(CounterNotifier.new);

class CounterNotifier extends Notifier<int> {
  @override
  int build() => 0;

  void increment() => state++;
}

testAsyncNotifier

testAsyncNotifier<CounterAsyncNotifier, int>(
  'expect [AsyncData(1)] when call increment',
  provider: counterAsyncNotifierProvider(0),
  act: (notifier) => notifier.increment(),
  expect: () => <AsyncValue<int>>[const AsyncData(1)],
);

testAsyncNotifier(
  'verify if mockRepository sideEffect is called',
  provider: sideEffectAsyncNotifierProvider(1),
  overrides: [repositoryProvider.overrideWithValue(mockRepository)],
  act: (notifier) => notifier.increment(),
  verify: (_) => verify(mockRepository.sideEffect).called(1),
);

final counterAsyncNotifierProvider =
    AsyncNotifierProviderFamily<CounterAsyncNotifier, int, int>(
  CounterAsyncNotifier.new,
);

class CounterAsyncNotifier extends FamilyAsyncNotifier<int, int> {
  @override
  FutureOr<int> build(int initialValue) => initialValue;

  void increment() => state = AsyncData(value + 1);
}

class MockRepository extends Mock implements Repository {}

final sideEffectAsyncNotifierProvider =
    AsyncNotifierProviderFamily<SideEffectAsyncNotifier, int, int>(
  SideEffectAsyncNotifier.new,
);

class SideEffectAsyncNotifier extends FamilyAsyncNotifier<int, int> {
  @override
  FutureOr<int> build(int initialValue) => initialValue;

  Repository get repository => ref.watch(repositoryProvider);

  void increment() {
    repository.sideEffect();
    state = AsyncData(value + 1);
  }
}

testResultProvider

testResultProvider<Repository>(
  'expect [1] when incrementCounter is called',
  provider: repositoryProvider,
  act: (result) => result.incrementCounter(),
  expect: () => [1],
);

final repositoryProvider = Provider<Repository>((ref) => Repository());

class Repository {
  int incrementCounter() => 1;
}

testStateNotifier

testStateNotifier<CounterStateNotifier, int>(
  'expect [0] when decrement is called and seed: 1',
  provider: counterStateNotifierProvider,
  act: (notifier) => notifier.decrement(),
  seed: 1,
  wait: const Duration(milliseconds: 100),
  expect: () => <int>[0],
);

final counterStateNotifierProvider =
    StateNotifierProvider<CounterStateNotifier, int>(
  (ref) => CounterStateNotifier(),
);

class CounterStateNotifier extends StateNotifier<int> {
  CounterStateNotifier() : super(0);

  void increment() => state++;

  Future<void> decrement() async {
    await Future<void>.delayed(const Duration(milliseconds: 100));
    state--;
  }
}