mirror of
https://github.com/flutter/flutter
synced 2024-10-14 04:02:56 +00:00
2329cb7ec8
* Bump mockito to 3.0.0-alpha+3 * Type annotation
277 lines
8.3 KiB
Dart
277 lines
8.3 KiB
Dart
// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:async';
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import 'package:flutter_tools/src/base/context.dart';
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import 'package:test/test.dart';
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void main() {
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group('AppContext', () {
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group('global getter', () {
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bool called;
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setUp(() {
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called = false;
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});
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test('returns non-null context in the root zone', () {
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expect(context, isNotNull);
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});
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test('returns root context in child of root zone if zone was manually created', () {
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final Zone rootZone = Zone.current;
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final AppContext rootContext = context;
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runZoned(() {
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expect(Zone.current, isNot(rootZone));
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expect(Zone.current.parent, rootZone);
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expect(context, rootContext);
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called = true;
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});
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expect(called, isTrue);
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});
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test('returns child context after run', () async {
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final AppContext rootContext = context;
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await rootContext.run<void>(name: 'child', body: () {
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expect(context, isNot(rootContext));
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expect(context.name, 'child');
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called = true;
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});
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expect(called, isTrue);
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});
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test('returns grandchild context after nested run', () async {
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final AppContext rootContext = context;
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await rootContext.run<void>(name: 'child', body: () async {
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final AppContext childContext = context;
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await childContext.run<void>(name: 'grandchild', body: () {
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expect(context, isNot(rootContext));
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expect(context, isNot(childContext));
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expect(context.name, 'grandchild');
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called = true;
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});
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});
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expect(called, isTrue);
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});
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test('scans up zone hierarchy for first context', () async {
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final AppContext rootContext = context;
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await rootContext.run<void>(name: 'child', body: () {
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final AppContext childContext = context;
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runZoned(() {
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expect(context, isNot(rootContext));
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expect(context, same(childContext));
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expect(context.name, 'child');
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called = true;
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});
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});
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expect(called, isTrue);
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});
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});
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group('operator[]', () {
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test('still finds values if async code runs after body has finished', () async {
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final Completer<void> outer = new Completer<void>();
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final Completer<void> inner = new Completer<void>();
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String value;
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await context.run<void>(
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body: () {
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outer.future.then((_) {
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value = context[String];
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inner.complete();
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});
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},
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fallbacks: <Type, Generator>{
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String: () => 'value',
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},
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);
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expect(value, isNull);
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outer.complete();
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await inner.future;
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expect(value, 'value');
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});
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test('caches generated override values', () async {
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int consultationCount = 0;
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String value;
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await context.run<void>(
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body: () async {
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final StringBuffer buf = new StringBuffer(context[String]);
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buf.write(context[String]);
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await context.run<void>(body: () {
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buf.write(context[String]);
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});
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value = buf.toString();
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},
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overrides: <Type, Generator>{
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String: () {
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consultationCount++;
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return 'v';
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},
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},
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);
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expect(value, 'vvv');
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expect(consultationCount, 1);
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});
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test('caches generated fallback values', () async {
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int consultationCount = 0;
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String value;
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await context.run(
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body: () async {
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final StringBuffer buf = new StringBuffer(context[String]);
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buf.write(context[String]);
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await context.run<void>(body: () {
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buf.write(context[String]);
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});
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value = buf.toString();
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},
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fallbacks: <Type, Generator>{
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String: () {
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consultationCount++;
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return 'v';
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},
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},
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);
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expect(value, 'vvv');
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expect(consultationCount, 1);
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});
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test('returns null if generated value is null', () async {
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final String value = await context.run<String>(
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body: () => context[String],
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overrides: <Type, Generator>{
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String: () => null,
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},
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);
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expect(value, isNull);
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});
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test('throws if generator has dependency cycle', () async {
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final Future<String> value = context.run<String>(
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body: () async {
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return context[String];
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},
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fallbacks: <Type, Generator>{
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int: () => int.parse(context[String]),
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String: () => '${context[double]}',
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double: () => context[int] * 1.0,
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},
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);
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try {
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await value;
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fail('ContextDependencyCycleException expected but not thrown.');
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} on ContextDependencyCycleException catch (e) {
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expect(e.cycle, <Type>[String, double, int]);
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expect(e.toString(), 'Dependency cycle detected: String -> double -> int');
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}
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});
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});
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group('run', () {
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test('returns the value returned by body', () async {
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expect(await context.run<int>(body: () => 123), 123);
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expect(await context.run<String>(body: () => 'value'), 'value');
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expect(await context.run<int>(body: () async => 456), 456);
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});
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test('passes name to child context', () async {
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await context.run<void>(name: 'child', body: () {
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expect(context.name, 'child');
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});
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});
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group('fallbacks', () {
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bool called;
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setUp(() {
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called = false;
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});
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test('are applied after parent context is consulted', () async {
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final String value = await context.run<String>(
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body: () {
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return context.run<String>(
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body: () {
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called = true;
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return context[String];
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},
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fallbacks: <Type, Generator>{
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String: () => 'child',
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},
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);
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},
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);
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expect(called, isTrue);
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expect(value, 'child');
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});
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test('are not applied if parent context supplies value', () async {
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bool childConsulted = false;
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final String value = await context.run<String>(
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body: () {
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return context.run<String>(
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body: () {
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called = true;
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return context[String];
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},
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fallbacks: <Type, Generator>{
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String: () {
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childConsulted = true;
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return 'child';
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},
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},
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);
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},
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fallbacks: <Type, Generator>{
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String: () => 'parent',
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},
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);
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expect(called, isTrue);
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expect(value, 'parent');
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expect(childConsulted, isFalse);
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});
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test('may depend on one another', () async {
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final String value = await context.run<String>(
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body: () {
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return context[String];
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},
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fallbacks: <Type, Generator>{
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int: () => 123,
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String: () => '-${context[int]}-',
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},
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);
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expect(value, '-123-');
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});
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});
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group('overrides', () {
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test('intercept consultation of parent context', () async {
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bool parentConsulted = false;
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final String value = await context.run<String>(
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body: () {
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return context.run<String>(
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body: () => context[String],
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overrides: <Type, Generator>{
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String: () => 'child',
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},
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);
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},
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fallbacks: <Type, Generator>{
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String: () {
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parentConsulted = true;
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return 'parent';
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},
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},
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);
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expect(value, 'child');
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expect(parentConsulted, isFalse);
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});
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});
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});
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});
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}
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