angular-cn/modules/angular2/test/change_detection/change_detector_spec.ts

1038 lines
36 KiB
TypeScript

///<reference path="../../src/change_detection/pipes/pipe.ts"/>
import {
ddescribe,
describe,
it,
iit,
xit,
expect,
beforeEach,
afterEach,
IS_DARTIUM
} from 'angular2/test_lib';
import {
CONST_EXPR,
isPresent,
isBlank,
isJsObject,
BaseException,
FunctionWrapper
} from 'angular2/src/facade/lang';
import {List, ListWrapper, MapWrapper, StringMapWrapper} from 'angular2/src/facade/collection';
import {
ChangeDispatcher,
DehydratedException,
DynamicChangeDetector,
ChangeDetectionError,
BindingRecord,
DirectiveRecord,
DirectiveIndex,
PipeRegistry,
Pipe,
CHECK_ALWAYS,
CHECK_ONCE,
CHECKED,
DETACHED,
ON_PUSH,
DEFAULT,
WrappedValue,
DynamicProtoChangeDetector,
ChangeDetectorDefinition,
Lexer,
Parser,
Locals,
ProtoChangeDetector
} from 'angular2/change_detection';
import {JitProtoChangeDetector} from 'angular2/src/change_detection/jit_proto_change_detector';
import {getDefinition} from './change_detector_config';
import {getFactoryById} from './generated/change_detector_classes';
const _DEFAULT_CONTEXT = CONST_EXPR(new Object());
/**
* Tests in this spec run against three different implementations of `AbstractChangeDetector`,
* `dynamic` (which use reflection to inspect objects), `JIT` (which are generated only for
* Javascript at runtime using `eval`) and `Pregen` (which are generated only for Dart prior
* to app deploy to avoid the need for reflection).
*
* Pre-generated classes require knowledge of the shape of the change detector at the time of Dart
* transformation, so in these tests we abstract a `ChangeDetectorDefinition` out into the
* change_detector_config library and define a build step which pre-generates the necessary change
* detectors to execute these tests. Once that built step has run, those generated change detectors
* can be found in the generated/change_detector_classes library.
*/
export function main() {
ListWrapper.forEach(['dynamic', 'JIT', 'Pregen'], (cdType) => {
if (cdType == "JIT" && IS_DARTIUM) return;
if (cdType == "Pregen" && !IS_DARTIUM) return;
describe(`${cdType} Change Detector`, () => {
function _getProtoChangeDetector(def: ChangeDetectorDefinition, registry = null) {
switch (cdType) {
case 'dynamic':
return new DynamicProtoChangeDetector(registry, def);
case 'JIT':
return new JitProtoChangeDetector(registry, def);
case 'Pregen':
return getFactoryById(def.id)(registry, def);
default:
return null;
}
}
function _createWithoutHydrate(expression: string) {
var dispatcher = new TestDispatcher();
var registry = null;
var cd = _getProtoChangeDetector(getDefinition(expression).cdDef, registry)
.instantiate(dispatcher);
return new _ChangeDetectorAndDispatcher(cd, dispatcher);
}
function _createChangeDetector(expression: string, context = _DEFAULT_CONTEXT,
registry = null) {
var dispatcher = new TestDispatcher();
var testDef = getDefinition(expression);
var protoCd = _getProtoChangeDetector(testDef.cdDef, registry);
var cd = protoCd.instantiate(dispatcher);
cd.hydrate(context, testDef.locals, null);
return new _ChangeDetectorAndDispatcher(cd, dispatcher);
}
function _bindSimpleValue(expression: string, context = _DEFAULT_CONTEXT) {
var val = _createChangeDetector(expression, context);
val.changeDetector.detectChanges();
return val.dispatcher.log;
}
it('should support literals',
() => { expect(_bindSimpleValue('10')).toEqual(['propName=10']); });
it('should strip quotes from literals',
() => { expect(_bindSimpleValue('"str"')).toEqual(['propName=str']); });
it('should support newlines in literals',
() => { expect(_bindSimpleValue('"a\n\nb"')).toEqual(['propName=a\n\nb']); });
it('should support + operations',
() => { expect(_bindSimpleValue('10 + 2')).toEqual(['propName=12']); });
it('should support - operations',
() => { expect(_bindSimpleValue('10 - 2')).toEqual(['propName=8']); });
it('should support * operations',
() => { expect(_bindSimpleValue('10 * 2')).toEqual(['propName=20']); });
it('should support / operations', () => {
expect(_bindSimpleValue('10 / 2')).toEqual([`propName=${5.0}`]);
}); // dart exp=5.0, js exp=5
it('should support % operations',
() => { expect(_bindSimpleValue('11 % 2')).toEqual(['propName=1']); });
it('should support == operations on identical',
() => { expect(_bindSimpleValue('1 == 1')).toEqual(['propName=true']); });
it('should support != operations',
() => { expect(_bindSimpleValue('1 != 1')).toEqual(['propName=false']); });
it('should support == operations on coerceible', () => {
var expectedValue = IS_DARTIUM ? 'false' : 'true';
expect(_bindSimpleValue('1 == true')).toEqual([`propName=${expectedValue}`]);
});
it('should support === operations on identical',
() => { expect(_bindSimpleValue('1 === 1')).toEqual(['propName=true']); });
it('should support !== operations',
() => { expect(_bindSimpleValue('1 !== 1')).toEqual(['propName=false']); });
it('should support === operations on coerceible',
() => { expect(_bindSimpleValue('1 === true')).toEqual(['propName=false']); });
it('should support true < operations',
() => { expect(_bindSimpleValue('1 < 2')).toEqual(['propName=true']); });
it('should support false < operations',
() => { expect(_bindSimpleValue('2 < 1')).toEqual(['propName=false']); });
it('should support false > operations',
() => { expect(_bindSimpleValue('1 > 2')).toEqual(['propName=false']); });
it('should support true > operations',
() => { expect(_bindSimpleValue('2 > 1')).toEqual(['propName=true']); });
it('should support true <= operations',
() => { expect(_bindSimpleValue('1 <= 2')).toEqual(['propName=true']); });
it('should support equal <= operations',
() => { expect(_bindSimpleValue('2 <= 2')).toEqual(['propName=true']); });
it('should support false <= operations',
() => { expect(_bindSimpleValue('2 <= 1')).toEqual(['propName=false']); });
it('should support true >= operations',
() => { expect(_bindSimpleValue('2 >= 1')).toEqual(['propName=true']); });
it('should support equal >= operations',
() => { expect(_bindSimpleValue('2 >= 2')).toEqual(['propName=true']); });
it('should support false >= operations',
() => { expect(_bindSimpleValue('1 >= 2')).toEqual(['propName=false']); });
it('should support true && operations',
() => { expect(_bindSimpleValue('true && true')).toEqual(['propName=true']); });
it('should support false && operations',
() => { expect(_bindSimpleValue('true && false')).toEqual(['propName=false']); });
it('should support true || operations',
() => { expect(_bindSimpleValue('true || false')).toEqual(['propName=true']); });
it('should support false || operations',
() => { expect(_bindSimpleValue('false || false')).toEqual(['propName=false']); });
it('should support negate',
() => { expect(_bindSimpleValue('!true')).toEqual(['propName=false']); });
it('should support double negate',
() => { expect(_bindSimpleValue('!!true')).toEqual(['propName=true']); });
it('should support true conditionals',
() => { expect(_bindSimpleValue('1 < 2 ? 1 : 2')).toEqual(['propName=1']); });
it('should support false conditionals',
() => { expect(_bindSimpleValue('1 > 2 ? 1 : 2')).toEqual(['propName=2']); });
it('should support keyed access to a list item',
() => { expect(_bindSimpleValue('["foo", "bar"][0]')).toEqual(['propName=foo']); });
it('should support keyed access to a map item',
() => { expect(_bindSimpleValue('{"foo": "bar"}["foo"]')).toEqual(['propName=bar']); });
it('should report all changes on the first run including uninitialized values', () => {
expect(_bindSimpleValue('value', new Uninitialized())).toEqual(['propName=null']);
});
it('should report all changes on the first run including null values', () => {
var td = new TestData(null);
expect(_bindSimpleValue('a', td)).toEqual(['propName=null']);
});
it('should support simple chained property access', () => {
var address = new Address('Grenoble');
var person = new Person('Victor', address);
expect(_bindSimpleValue('address.city', person)).toEqual(['propName=Grenoble']);
});
it('should support the safe navigation operator', () => {
var person = new Person('Victor', null);
expect(_bindSimpleValue('address?.city', person)).toEqual(['propName=null']);
expect(_bindSimpleValue('address?.toString()', person)).toEqual(['propName=null']);
person.address = new Address('MTV');
expect(_bindSimpleValue('address?.city', person)).toEqual(['propName=MTV']);
expect(_bindSimpleValue('address?.toString()', person)).toEqual(['propName=MTV']);
});
it('should support method calls', () => {
var person = new Person('Victor');
expect(_bindSimpleValue('sayHi("Jim")', person)).toEqual(['propName=Hi, Jim']);
});
it('should support function calls', () => {
var td = new TestData(() => (a) => a);
expect(_bindSimpleValue('a()(99)', td)).toEqual(['propName=99']);
});
it('should support chained method calls', () => {
var person = new Person('Victor');
var td = new TestData(person);
expect(_bindSimpleValue('a.sayHi("Jim")', td)).toEqual(['propName=Hi, Jim']);
});
it('should do simple watching', () => {
var person = new Person('misko');
var val = _createChangeDetector('name', person);
val.changeDetector.detectChanges();
expect(val.dispatcher.log).toEqual(['propName=misko']);
val.dispatcher.clear();
val.changeDetector.detectChanges();
expect(val.dispatcher.log).toEqual([]);
val.dispatcher.clear();
person.name = 'Misko';
val.changeDetector.detectChanges();
expect(val.dispatcher.log).toEqual(['propName=Misko']);
});
it('should support literal array', () => {
var val = _createChangeDetector('[1, 2]');
val.changeDetector.detectChanges();
expect(val.dispatcher.loggedValues).toEqual([[1, 2]]);
val = _createChangeDetector('[1, a]', new TestData(2));
val.changeDetector.detectChanges();
expect(val.dispatcher.loggedValues).toEqual([[1, 2]]);
});
it('should support literal maps', () => {
var val = _createChangeDetector('{z: 1}');
val.changeDetector.detectChanges();
expect(val.dispatcher.loggedValues[0]['z']).toEqual(1);
val = _createChangeDetector('{z: a}', new TestData(1));
val.changeDetector.detectChanges();
expect(val.dispatcher.loggedValues[0]['z']).toEqual(1);
});
it('should support interpolation', () => {
var val = _createChangeDetector('interpolation', new TestData('value'));
val.changeDetector.hydrate(new TestData('value'), null, null);
val.changeDetector.detectChanges();
expect(val.dispatcher.log).toEqual(['propName=BvalueA']);
});
describe('pure functions', () => {
it('should preserve memoized result', () => {
var person = new Person('bob');
var val = _createChangeDetector('passThrough([12])', person);
val.changeDetector.detectChanges();
val.changeDetector.detectChanges();
expect(val.dispatcher.loggedValues).toEqual([[12]]);
});
});
describe('change notification', () => {
describe('simple checks', () => {
it('should pass a change record to the dispatcher', () => {
var person = new Person('bob');
var val = _createChangeDetector('name', person);
val.changeDetector.detectChanges();
expect(val.dispatcher.loggedValues).toEqual(['bob']);
});
});
describe('pipes', () => {
it('should pass a change record to the dispatcher', () => {
var registry = new FakePipeRegistry('pipe', () => new CountingPipe());
var person = new Person('bob');
var val = _createChangeDetector('name | pipe', person, registry);
val.changeDetector.detectChanges();
expect(val.dispatcher.loggedValues).toEqual(['bob state:0']);
});
it('should support arguments in pipes', () => {
var registry = new FakePipeRegistry('pipe', () => new MultiArgPipe());
var address = new Address('two');
var person = new Person('value', address);
var val = _createChangeDetector("name | pipe:'one':address.city", person, registry);
val.changeDetector.detectChanges();
expect(val.dispatcher.loggedValues).toEqual(['value one two default']);
});
});
it('should notify the dispatcher on all changes done', () => {
var val = _createChangeDetector('name', new Person('bob'));
val.changeDetector.detectChanges();
expect(val.dispatcher.onAllChangesDoneCalled).toEqual(true);
});
describe('updating directives', () => {
var directive1;
var directive2;
beforeEach(() => {
directive1 = new TestDirective();
directive2 = new TestDirective();
});
it('should happen directly, without invoking the dispatcher', () => {
var val = _createWithoutHydrate('directNoDispatcher');
val.changeDetector.hydrate(_DEFAULT_CONTEXT, null,
new FakeDirectives([directive1], []));
val.changeDetector.detectChanges();
expect(val.dispatcher.loggedValues).toEqual([]);
expect(directive1.a).toEqual(42);
});
describe('onChange', () => {
it('should notify the directive when a group of records changes', () => {
var cd = _createWithoutHydrate('groupChanges').changeDetector;
cd.hydrate(_DEFAULT_CONTEXT, null, new FakeDirectives([directive1, directive2], []));
cd.detectChanges();
expect(directive1.changes).toEqual({'a': 1, 'b': 2});
expect(directive2.changes).toEqual({'a': 3});
});
});
describe('onCheck', () => {
it('should notify the directive when it is checked', () => {
var cd = _createWithoutHydrate('directiveOnCheck').changeDetector;
cd.hydrate(_DEFAULT_CONTEXT, null, new FakeDirectives([directive1], []));
cd.detectChanges();
expect(directive1.onCheckCalled).toBe(true);
directive1.onCheckCalled = false;
cd.detectChanges();
expect(directive1.onCheckCalled).toBe(true);
});
it('should not call onCheck in detectNoChanges', () => {
var cd = _createWithoutHydrate('directiveOnCheck').changeDetector;
cd.hydrate(_DEFAULT_CONTEXT, null, new FakeDirectives([directive1], []));
cd.checkNoChanges();
expect(directive1.onCheckCalled).toBe(false);
});
});
describe('onInit', () => {
it('should notify the directive after it has been checked the first time', () => {
var cd = _createWithoutHydrate('directiveOnInit').changeDetector;
cd.hydrate(_DEFAULT_CONTEXT, null, new FakeDirectives([directive1], []));
cd.detectChanges();
expect(directive1.onInitCalled).toBe(true);
directive1.onInitCalled = false;
cd.detectChanges();
expect(directive1.onInitCalled).toBe(false);
});
it('should not call onInit in detectNoChanges', () => {
var cd = _createWithoutHydrate('directiveOnInit').changeDetector;
cd.hydrate(_DEFAULT_CONTEXT, null, new FakeDirectives([directive1], []));
cd.checkNoChanges();
expect(directive1.onInitCalled).toBe(false);
});
});
describe('onAllChangesDone', () => {
it('should be called after processing all the children', () => {
var cd = _createWithoutHydrate('emptyWithDirectiveRecords').changeDetector;
cd.hydrate(_DEFAULT_CONTEXT, null, new FakeDirectives([directive1, directive2], []));
cd.detectChanges();
expect(directive1.onChangesDoneCalled).toBe(true);
expect(directive2.onChangesDoneCalled).toBe(true);
// reset directives
directive1.onChangesDoneCalled = false;
directive2.onChangesDoneCalled = false;
// Verify that checking should not call them.
cd.checkNoChanges();
expect(directive1.onChangesDoneCalled).toBe(false);
expect(directive2.onChangesDoneCalled).toBe(false);
// re-verify that changes are still detected
cd.detectChanges();
expect(directive1.onChangesDoneCalled).toBe(true);
expect(directive2.onChangesDoneCalled).toBe(true);
});
it('should not be called when onAllChangesDone is false', () => {
var cd = _createWithoutHydrate('noCallbacks').changeDetector;
cd.hydrate(_DEFAULT_CONTEXT, null, new FakeDirectives([directive1], []));
cd.detectChanges();
expect(directive1.onChangesDoneCalled).toEqual(false);
});
it('should be called in reverse order so the child is always notified before the parent',
() => {
var cd = _createWithoutHydrate('emptyWithDirectiveRecords').changeDetector;
var onChangesDoneCalls = [];
var td1;
td1 = new TestDirective(() => onChangesDoneCalls.push(td1));
var td2;
td2 = new TestDirective(() => onChangesDoneCalls.push(td2));
cd.hydrate(_DEFAULT_CONTEXT, null, new FakeDirectives([td1, td2], []));
cd.detectChanges();
expect(onChangesDoneCalls).toEqual([td2, td1]);
});
it('should be called before processing shadow dom children', () => {
var parent = _createWithoutHydrate('directNoDispatcher').changeDetector;
var child = _createWithoutHydrate('directNoDispatcher').changeDetector;
parent.addShadowDomChild(child);
var orderOfOperations = [];
var directiveInShadowDom = null;
directiveInShadowDom =
new TestDirective(() => { orderOfOperations.push(directiveInShadowDom); });
var parentDirective = null;
parentDirective =
new TestDirective(() => { orderOfOperations.push(parentDirective); });
parent.hydrate(_DEFAULT_CONTEXT, null, new FakeDirectives([parentDirective], []));
child.hydrate(_DEFAULT_CONTEXT, null, new FakeDirectives([directiveInShadowDom], []));
parent.detectChanges();
expect(orderOfOperations).toEqual([parentDirective, directiveInShadowDom]);
});
});
});
});
describe('reading directives', () => {
it('should read directive properties', () => {
var directive = new TestDirective();
directive.a = 'aaa';
var val = _createWithoutHydrate('readingDirectives');
val.changeDetector.hydrate(_DEFAULT_CONTEXT, null, new FakeDirectives([directive], []));
val.changeDetector.detectChanges();
expect(val.dispatcher.loggedValues).toEqual(['aaa']);
});
});
describe('enforce no new changes', () => {
it('should throw when a record gets changed after it has been checked', () => {
var val = _createChangeDetector('a', new TestData('value'));
expect(() => { val.changeDetector.checkNoChanges(); })
.toThrowError(new RegExp(
'Expression [\'"]a in location[\'"] has changed after it was checked'));
});
it('should not break the next run', () => {
var val = _createChangeDetector('a', new TestData('value'));
expect(() => val.changeDetector.checkNoChanges())
.toThrowError(new RegExp(
'Expression [\'"]a in location[\'"] has changed after it was checked.'));
val.changeDetector.detectChanges();
expect(val.dispatcher.loggedValues).toEqual(['value']);
});
});
describe('error handling', () => {
it('should wrap exceptions into ChangeDetectionError', () => {
var val = _createChangeDetector('invalidFn(1)');
try {
val.changeDetector.detectChanges();
throw new BaseException('fail');
} catch (e) {
expect(e).toBeAnInstanceOf(ChangeDetectionError);
expect(e.location).toEqual('invalidFn(1) in location');
}
});
});
describe('Locals', () => {
it('should read a value from locals',
() => { expect(_bindSimpleValue('valueFromLocals')).toEqual(['propName=value']); });
it('should invoke a function from local',
() => { expect(_bindSimpleValue('functionFromLocals')).toEqual(['propName=value']); });
it('should handle nested locals',
() => { expect(_bindSimpleValue('nestedLocals')).toEqual(['propName=value']); });
it('should fall back to a regular field read when the locals map' +
'does not have the requested field',
() => {
expect(_bindSimpleValue('fallbackLocals', new Person('Jim')))
.toEqual(['propName=Jim']);
});
it('should correctly handle nested properties', () => {
var address = new Address('Grenoble');
var person = new Person('Victor', address);
expect(_bindSimpleValue('contextNestedPropertyWithLocals', person))
.toEqual(['propName=Grenoble']);
expect(_bindSimpleValue('localPropertyWithSimilarContext', person))
.toEqual(['propName=MTV']);
});
});
describe('handle children', () => {
var parent, child;
beforeEach(() => {
parent = _createChangeDetector('10').changeDetector;
child = _createChangeDetector('"str"').changeDetector;
});
it('should add light dom children', () => {
parent.addChild(child);
expect(parent.lightDomChildren.length).toEqual(1);
expect(parent.lightDomChildren[0]).toBe(child);
});
it('should add shadow dom children', () => {
parent.addShadowDomChild(child);
expect(parent.shadowDomChildren.length).toEqual(1);
expect(parent.shadowDomChildren[0]).toBe(child);
});
it('should remove light dom children', () => {
parent.addChild(child);
parent.removeChild(child);
expect(parent.lightDomChildren).toEqual([]);
});
it('should remove shadow dom children', () => {
parent.addShadowDomChild(child);
parent.removeShadowDomChild(child);
expect(parent.shadowDomChildren.length).toEqual(0);
});
});
describe('mode', () => {
it('should set the mode to CHECK_ALWAYS when the default change detection is used', () => {
var cd = _createWithoutHydrate('emptyUsingDefaultStrategy').changeDetector;
expect(cd.mode).toEqual(null);
cd.hydrate(_DEFAULT_CONTEXT, null, null);
expect(cd.mode).toEqual(CHECK_ALWAYS);
});
it('should set the mode to CHECK_ONCE when the push change detection is used', () => {
var cd = _createWithoutHydrate('emptyUsingOnPushStrategy').changeDetector;
cd.hydrate(_DEFAULT_CONTEXT, null, null);
expect(cd.mode).toEqual(CHECK_ONCE);
});
it('should not check a detached change detector', () => {
var val = _createChangeDetector('a', new TestData('value'));
val.changeDetector.hydrate(_DEFAULT_CONTEXT, null, null);
val.changeDetector.mode = DETACHED;
val.changeDetector.detectChanges();
expect(val.dispatcher.log).toEqual([]);
});
it('should not check a checked change detector', () => {
var val = _createChangeDetector('a', new TestData('value'));
val.changeDetector.hydrate(_DEFAULT_CONTEXT, null, null);
val.changeDetector.mode = CHECKED;
val.changeDetector.detectChanges();
expect(val.dispatcher.log).toEqual([]);
});
it('should change CHECK_ONCE to CHECKED', () => {
var cd = _createChangeDetector('10').changeDetector;
cd.hydrate(_DEFAULT_CONTEXT, null, null);
cd.mode = CHECK_ONCE;
cd.detectChanges();
expect(cd.mode).toEqual(CHECKED);
});
it('should not change the CHECK_ALWAYS', () => {
var cd = _createChangeDetector('10').changeDetector;
cd.hydrate(_DEFAULT_CONTEXT, null, null);
cd.mode = CHECK_ALWAYS;
cd.detectChanges();
expect(cd.mode).toEqual(CHECK_ALWAYS);
});
describe('marking ON_PUSH detectors as CHECK_ONCE after an update', () => {
var checkedDetector;
var directives;
beforeEach(() => {
checkedDetector = _createWithoutHydrate('emptyUsingOnPushStrategy').changeDetector;
checkedDetector.hydrate(_DEFAULT_CONTEXT, null, null);
checkedDetector.mode = CHECKED;
var targetDirective = new TestData(null);
directives = new FakeDirectives([targetDirective], [checkedDetector]);
});
it('should set the mode to CHECK_ONCE when a binding is updated', () => {
var cd = _createWithoutHydrate('onPushRecordsUsingDefaultStrategy').changeDetector;
cd.hydrate(_DEFAULT_CONTEXT, null, directives);
expect(checkedDetector.mode).toEqual(CHECKED);
// evaluate the record, update the targetDirective, and mark its detector as
// CHECK_ONCE
cd.detectChanges();
expect(checkedDetector.mode).toEqual(CHECK_ONCE);
});
});
});
describe('markPathToRootAsCheckOnce', () => {
function changeDetector(mode, parent) {
var val = _createChangeDetector('10');
val.changeDetector.mode = mode;
if (isPresent(parent)) parent.addChild(val.changeDetector);
return val.changeDetector;
}
it('should mark all checked detectors as CHECK_ONCE until reaching a detached one', () => {
var root = changeDetector(CHECK_ALWAYS, null);
var disabled = changeDetector(DETACHED, root);
var parent = changeDetector(CHECKED, disabled);
var checkAlwaysChild = changeDetector(CHECK_ALWAYS, parent);
var checkOnceChild = changeDetector(CHECK_ONCE, checkAlwaysChild);
var checkedChild = changeDetector(CHECKED, checkOnceChild);
checkedChild.markPathToRootAsCheckOnce();
expect(root.mode).toEqual(CHECK_ALWAYS);
expect(disabled.mode).toEqual(DETACHED);
expect(parent.mode).toEqual(CHECK_ONCE);
expect(checkAlwaysChild.mode).toEqual(CHECK_ALWAYS);
expect(checkOnceChild.mode).toEqual(CHECK_ONCE);
expect(checkedChild.mode).toEqual(CHECK_ONCE);
});
});
describe('hydration', () => {
it('should be able to rehydrate a change detector', () => {
var cd = _createChangeDetector('name').changeDetector;
cd.hydrate('some context', null, null);
expect(cd.hydrated()).toBe(true);
cd.dehydrate();
expect(cd.hydrated()).toBe(false);
cd.hydrate('other context', null, null);
expect(cd.hydrated()).toBe(true);
});
it('should destroy all active pipes during dehyration', () => {
var pipe = new OncePipe();
var registry = new FakePipeRegistry('pipe', () => pipe);
var cd = _createChangeDetector('name | pipe', new Person('bob'), registry).changeDetector;
cd.detectChanges();
cd.dehydrate();
expect(pipe.destroyCalled).toBe(true);
});
it('should throw when detectChanges is called on a dehydrated detector', () => {
var context = new Person('Bob');
var val = _createChangeDetector('name', context);
val.changeDetector.detectChanges();
expect(val.dispatcher.log).toEqual(['propName=Bob']);
val.changeDetector.dehydrate();
var dehydratedException = new DehydratedException();
expect(() => {val.changeDetector.detectChanges()})
.toThrowError(dehydratedException.toString());
expect(val.dispatcher.log).toEqual(['propName=Bob']);
});
});
describe('pipes', () => {
it('should support pipes', () => {
var registry = new FakePipeRegistry('pipe', () => new CountingPipe());
var ctx = new Person('Megatron');
var val = _createChangeDetector('name | pipe', ctx, registry);
val.changeDetector.detectChanges();
expect(val.dispatcher.log).toEqual(['propName=Megatron state:0']);
val.dispatcher.clear();
val.changeDetector.detectChanges();
expect(val.dispatcher.log).toEqual(['propName=Megatron state:1']);
});
it('should lookup pipes in the registry when the context is not supported', () => {
var registry = new FakePipeRegistry('pipe', () => new OncePipe());
var ctx = new Person('Megatron');
var cd = _createChangeDetector('name | pipe', ctx, registry).changeDetector;
cd.detectChanges();
expect(registry.numberOfLookups).toEqual(1);
ctx.name = 'Optimus Prime';
cd.detectChanges();
expect(registry.numberOfLookups).toEqual(2);
});
it('should invoke onDestroy on a pipe before switching to another one', () => {
var pipe = new OncePipe();
var registry = new FakePipeRegistry('pipe', () => pipe);
var ctx = new Person('Megatron');
var cd = _createChangeDetector('name | pipe', ctx, registry).changeDetector;
cd.detectChanges();
ctx.name = 'Optimus Prime';
cd.detectChanges();
expect(pipe.destroyCalled).toEqual(true);
});
it('should inject the ChangeDetectorRef ' +
'of the encompassing component into a pipe',
() => {
var registry = new FakePipeRegistry('pipe', () => new IdentityPipe());
var cd =
_createChangeDetector('name | pipe', new Person('bob'), registry).changeDetector;
cd.detectChanges();
expect(registry.cdRef).toBe(cd.ref);
});
});
it('should do nothing when no change', () => {
var registry = new FakePipeRegistry('pipe', () => new IdentityPipe());
var ctx = new Person('Megatron');
var val = _createChangeDetector('name | pipe', ctx, registry);
val.changeDetector.detectChanges();
expect(val.dispatcher.log).toEqual(['propName=Megatron']);
val.dispatcher.clear();
val.changeDetector.detectChanges();
expect(val.dispatcher.log).toEqual([]);
});
it('should unwrap the wrapped value', () => {
var registry = new FakePipeRegistry('pipe', () => new WrappedPipe());
var ctx = new Person('Megatron');
var val = _createChangeDetector('name | pipe', ctx, registry);
val.changeDetector.detectChanges();
expect(val.dispatcher.log).toEqual(['propName=Megatron']);
});
});
});
}
class CountingPipe implements Pipe {
state: number = 0;
onDestroy() {}
supports(newValue) { return true; }
transform(value, args = null) { return `${value} state:${this.state ++}`; }
}
class OncePipe implements Pipe {
called: boolean = false;
destroyCalled: boolean = false;
supports(newValue) { return !this.called; }
onDestroy() { this.destroyCalled = true; }
transform(value, args = null) {
this.called = true;
return value;
}
}
class IdentityPipe implements Pipe {
supports(obj): boolean { return true; }
onDestroy() {}
transform(value, args = null) { return value; }
}
class WrappedPipe implements Pipe {
supports(obj): boolean { return true; }
onDestroy() {}
transform(value, args = null) { return WrappedValue.wrap(value); }
}
class MultiArgPipe implements Pipe {
transform(value, args = null) {
var arg1 = args[0];
var arg2 = args[1];
var arg3 = args.length > 2 ? args[2] : 'default';
return `${value} ${arg1} ${arg2} ${arg3}`;
}
supports(obj): boolean { return true; }
onDestroy(): void {}
}
class FakePipeRegistry extends PipeRegistry {
numberOfLookups: number;
pipeType: string;
factory: Function;
cdRef: any;
constructor(pipeType, factory) {
super({});
this.pipeType = pipeType;
this.factory = factory;
this.numberOfLookups = 0;
}
get(type: string, obj, cdRef?, existingPipe?) {
if (type != this.pipeType) return null;
this.numberOfLookups++;
this.cdRef = cdRef;
return this.factory();
}
}
class TestDirective {
a;
b;
changes;
onChangesDoneCalled;
onChangesDoneSpy;
onCheckCalled;
onInitCalled;
constructor(onChangesDoneSpy = null) {
this.onChangesDoneCalled = false;
this.onCheckCalled = false;
this.onInitCalled = false;
this.onChangesDoneSpy = onChangesDoneSpy;
this.a = null;
this.b = null;
this.changes = null;
}
onCheck() { this.onCheckCalled = true; }
onInit() { this.onInitCalled = true; }
onChange(changes) {
var r = {};
StringMapWrapper.forEach(changes, (c, key) => r[key] = c.currentValue);
this.changes = r;
}
onAllChangesDone() {
this.onChangesDoneCalled = true;
if (isPresent(this.onChangesDoneSpy)) {
this.onChangesDoneSpy();
}
}
}
class Person {
age: number;
constructor(public name: string, public address: Address = null) {}
sayHi(m) { return `Hi, ${m}`; }
passThrough(val) { return val; }
toString(): string {
var address = this.address == null ? '' : ' address=' + this.address.toString();
return 'name=' + this.name + address;
}
}
class Address {
constructor(public city: string) {}
toString(): string { return isBlank(this.city) ? '-' : this.city }
}
class Uninitialized {
value: any;
}
class TestData {
constructor(public a: any) {}
}
class FakeDirectives {
constructor(public directives: List<TestData | TestDirective>,
public detectors: List<ProtoChangeDetector>) {}
getDirectiveFor(di: DirectiveIndex) { return this.directives[di.directiveIndex]; }
getDetectorFor(di: DirectiveIndex) { return this.detectors[di.directiveIndex]; }
}
class TestDispatcher implements ChangeDispatcher {
log: List<string>;
loggedValues: List<any>;
onAllChangesDoneCalled: boolean = false;
constructor() { this.clear(); }
clear() {
this.log = [];
this.loggedValues = [];
this.onAllChangesDoneCalled = true;
}
notifyOnBinding(binding, value) {
this.log.push(`${binding.propertyName}=${this._asString(value)}`);
this.loggedValues.push(value);
}
notifyOnAllChangesDone() { this.onAllChangesDoneCalled = true; }
_asString(value) { return (isBlank(value) ? 'null' : value.toString()); }
}
class _ChangeDetectorAndDispatcher {
constructor(public changeDetector: any, public dispatcher: TestDispatcher) {}
}