717 lines
23 KiB
JavaScript
717 lines
23 KiB
JavaScript
import {ddescribe, describe, it, iit, xit, expect, beforeEach, afterEach, IS_DARTIUM} from 'angular2/test_lib';
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import {isPresent, isBlank, isJsObject, BaseException, FunctionWrapper} from 'angular2/src/facade/lang';
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import {List, ListWrapper, MapWrapper, StringMapWrapper} from 'angular2/src/facade/collection';
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import {Parser} from 'angular2/src/change_detection/parser/parser';
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import {Lexer} from 'angular2/src/change_detection/parser/lexer';
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import {ChangeDispatcher, DynamicChangeDetector, ChangeDetectionError, ContextWithVariableBindings,
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PipeRegistry, Pipe, NO_CHANGE, CHECK_ALWAYS, CHECK_ONCE, CHECKED, DETACHED} from 'angular2/change_detection';
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import {ChangeDetectionUtil} from 'angular2/src/change_detection/change_detection_util';
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import {JitProtoChangeDetector, DynamicProtoChangeDetector} from 'angular2/src/change_detection/proto_change_detector';
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export function main() {
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describe("change detection", () => {
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StringMapWrapper.forEach(
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{ "dynamic": (registry = null) => new DynamicProtoChangeDetector(registry),
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"JIT": (registry = null) => new JitProtoChangeDetector(registry)
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}, (createProtoChangeDetector, name) => {
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if (name == "JIT" && IS_DARTIUM) return;
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function ast(exp:string, location:string = 'location') {
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var parser = new Parser(new Lexer());
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return parser.parseBinding(exp, location);
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}
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function createChangeDetector(memo:string, exp:string, context = null, registry = null) {
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var pcd = createProtoChangeDetector(registry);
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pcd.addAst(ast(exp), memo, memo);
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var dispatcher = new TestDispatcher();
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var cd = pcd.instantiate(dispatcher);
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cd.hydrate(context);
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return {"changeDetector" : cd, "dispatcher" : dispatcher};
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}
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function executeWatch(memo:string, exp:string, context = null) {
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var res = createChangeDetector(memo, exp, context);
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res["changeDetector"].detectChanges();
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return res["dispatcher"].log;
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}
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describe(`${name} change detection`, () => {
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it('should do simple watching', () => {
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var person = new Person("misko");
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var c = createChangeDetector('name', 'name', person);
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var cd = c["changeDetector"];
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var dispatcher = c["dispatcher"];
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cd.detectChanges();
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expect(dispatcher.log).toEqual(['name=misko']);
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dispatcher.clear();
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cd.detectChanges();
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expect(dispatcher.log).toEqual([]);
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dispatcher.clear();
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person.name = "Misko";
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cd.detectChanges();
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expect(dispatcher.log).toEqual(['name=Misko']);
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});
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it('should report all changes on the first run including uninitialized values', () => {
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expect(executeWatch('value', 'value', new Uninitialized())).toEqual(['value=null']);
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});
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it('should report all changes on the first run including null values', () => {
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var td = new TestData(null);
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expect(executeWatch('a', 'a', td)).toEqual(['a=null']);
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});
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it("should support literals", () => {
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expect(executeWatch('const', '10')).toEqual(['const=10']);
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expect(executeWatch('const', '"str"')).toEqual(['const=str']);
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expect(executeWatch('const', '"a\n\nb"')).toEqual(['const=a\n\nb']);
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});
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it('simple chained property access', () => {
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var address = new Address('Grenoble');
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var person = new Person('Victor', address);
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expect(executeWatch('address.city', 'address.city', person))
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.toEqual(['address.city=Grenoble']);
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});
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it("should support method calls", () => {
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var person = new Person('Victor');
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expect(executeWatch('m', 'sayHi("Jim")', person)).toEqual(['m=Hi, Jim']);
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});
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it("should support function calls", () => {
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var td = new TestData(() => (a) => a);
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expect(executeWatch('value', 'a()(99)', td)).toEqual(['value=99']);
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});
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it("should support chained method calls", () => {
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var person = new Person('Victor');
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var td = new TestData(person);
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expect(executeWatch('m', 'a.sayHi("Jim")', td)).toEqual(['m=Hi, Jim']);
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});
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it("should support literal array", () => {
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var c = createChangeDetector('array', '[1,2]');
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c["changeDetector"].detectChanges();
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expect(c["dispatcher"].loggedValues).toEqual([[[1, 2]]]);
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c = createChangeDetector('array', '[1,a]', new TestData(2));
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c["changeDetector"].detectChanges();
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expect(c["dispatcher"].loggedValues).toEqual([[[1, 2]]]);
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});
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it("should support literal maps", () => {
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var c = createChangeDetector('map', '{z:1}');
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c["changeDetector"].detectChanges();
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expect(c["dispatcher"].loggedValues[0][0]['z']).toEqual(1);
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c = createChangeDetector('map', '{z:a}', new TestData(1));
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c["changeDetector"].detectChanges();
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expect(c["dispatcher"].loggedValues[0][0]['z']).toEqual(1);
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});
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it("should support binary operations", () => {
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expect(executeWatch('exp', '10 + 2')).toEqual(['exp=12']);
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expect(executeWatch('exp', '10 - 2')).toEqual(['exp=8']);
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expect(executeWatch('exp', '10 * 2')).toEqual(['exp=20']);
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expect(executeWatch('exp', '10 / 2')).toEqual([`exp=${5.0}`]); //dart exp=5.0, js exp=5
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expect(executeWatch('exp', '11 % 2')).toEqual(['exp=1']);
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expect(executeWatch('exp', '1 == 1')).toEqual(['exp=true']);
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expect(executeWatch('exp', '1 != 1')).toEqual(['exp=false']);
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expect(executeWatch('exp', '1 < 2')).toEqual(['exp=true']);
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expect(executeWatch('exp', '2 < 1')).toEqual(['exp=false']);
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expect(executeWatch('exp', '2 > 1')).toEqual(['exp=true']);
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expect(executeWatch('exp', '2 < 1')).toEqual(['exp=false']);
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expect(executeWatch('exp', '1 <= 2')).toEqual(['exp=true']);
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expect(executeWatch('exp', '2 <= 2')).toEqual(['exp=true']);
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expect(executeWatch('exp', '2 <= 1')).toEqual(['exp=false']);
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expect(executeWatch('exp', '2 >= 1')).toEqual(['exp=true']);
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expect(executeWatch('exp', '2 >= 2')).toEqual(['exp=true']);
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expect(executeWatch('exp', '1 >= 2')).toEqual(['exp=false']);
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expect(executeWatch('exp', 'true && true')).toEqual(['exp=true']);
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expect(executeWatch('exp', 'true && false')).toEqual(['exp=false']);
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expect(executeWatch('exp', 'true || false')).toEqual(['exp=true']);
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expect(executeWatch('exp', 'false || false')).toEqual(['exp=false']);
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});
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it("should support negate", () => {
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expect(executeWatch('exp', '!true')).toEqual(['exp=false']);
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expect(executeWatch('exp', '!!true')).toEqual(['exp=true']);
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});
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it("should support conditionals", () => {
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expect(executeWatch('m', '1 < 2 ? 1 : 2')).toEqual(['m=1']);
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expect(executeWatch('m', '1 > 2 ? 1 : 2')).toEqual(['m=2']);
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});
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describe("keyed access", () => {
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it("should support accessing a list item", () => {
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expect(executeWatch('array[0]', '["foo", "bar"][0]')).toEqual(['array[0]=foo']);
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});
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it("should support accessing a map item", () => {
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expect(executeWatch('map[foo]', '{"foo": "bar"}["foo"]')).toEqual(['map[foo]=bar']);
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});
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});
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it("should support interpolation", () => {
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var parser = new Parser(new Lexer());
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var pcd = createProtoChangeDetector();
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var ast = parser.parseInterpolation("B{{a}}A", "location");
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pcd.addAst(ast, "memo", "memo");
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var dispatcher = new TestDispatcher();
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var cd = pcd.instantiate(dispatcher);
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cd.hydrate(new TestData("value"));
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cd.detectChanges();
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expect(dispatcher.log).toEqual(["memo=BvalueA"]);
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});
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describe("change notification", () => {
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describe("simple checks", () => {
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it("should pass a change record to the dispatcher", () => {
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var person = new Person('bob');
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var c = createChangeDetector('name', 'name', person);
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var cd = c["changeDetector"];
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var dispatcher = c["dispatcher"];
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cd.detectChanges();
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var changeRecord = dispatcher.changeRecords[0][0];
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expect(changeRecord.bindingMemento).toEqual('name');
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expect(changeRecord.change.currentValue).toEqual('bob');
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expect(changeRecord.change.previousValue).toEqual(ChangeDetectionUtil.unitialized());
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});
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});
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describe("pipes", () => {
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it("should pass a change record to the dispatcher", () => {
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var registry = new FakePipeRegistry('pipe', () => new CountingPipe());
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var person = new Person('bob');
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var c = createChangeDetector('name', 'name | pipe', person, registry);
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var cd = c["changeDetector"];
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var dispatcher = c["dispatcher"];
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cd.detectChanges();
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var changeRecord = dispatcher.changeRecords[0][0];
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expect(changeRecord.bindingMemento).toEqual('name');
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expect(changeRecord.change.currentValue).toEqual('bob state:0');
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expect(changeRecord.change.previousValue).toEqual(ChangeDetectionUtil.unitialized());
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});
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});
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describe("group changes", () => {
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it("should notify the dispatcher when a group of records changes", () => {
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var pcd = createProtoChangeDetector();
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pcd.addAst(ast("1 + 2"), "memo", "1");
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pcd.addAst(ast("10 + 20"), "memo", "1");
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pcd.addAst(ast("100 + 200"), "memo2", "2");
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var dispatcher = new TestDispatcher();
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var cd = pcd.instantiate(dispatcher);
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cd.detectChanges();
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expect(dispatcher.loggedValues).toEqual([[3, 30], [300]]);
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});
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it("should notify the dispatcher before switching to the next group", () => {
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var pcd = createProtoChangeDetector();
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pcd.addAst(ast("a()"), "a", "1");
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pcd.addAst(ast("b()"), "b", "2");
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pcd.addAst(ast("c()"), "c", "2");
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var dispatcher = new TestDispatcher();
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var cd = pcd.instantiate(dispatcher);
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var tr = new TestRecord();
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tr.a = () => {
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dispatcher.logValue('InvokeA');
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return 'a'
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};
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tr.b = () => {
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dispatcher.logValue('InvokeB');
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return 'b'
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};
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tr.c = () => {
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dispatcher.logValue('InvokeC');
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return 'c'
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};
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cd.hydrate(tr);
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cd.detectChanges();
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expect(dispatcher.loggedValues).toEqual(['InvokeA', ['a'], 'InvokeB', 'InvokeC', ['b', 'c']]);
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});
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});
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});
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describe("enforce no new changes", () => {
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it("should throw when a record gets changed after it has been checked", () => {
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var pcd = createProtoChangeDetector();
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pcd.addAst(ast("a"), "a", 1);
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var dispatcher = new TestDispatcher();
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var cd = pcd.instantiate(dispatcher);
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cd.hydrate(new TestData('value'));
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expect(() => {
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cd.checkNoChanges();
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}).toThrowError(new RegExp("Expression 'a in location' has changed after it was checked"));
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});
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});
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//TODO vsavkin: implement it
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describe("error handling", () => {
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xit("should wrap exceptions into ChangeDetectionError", () => {
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var pcd = createProtoChangeDetector();
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pcd.addAst(ast('invalidProp', 'someComponent'), "a", 1);
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var cd = pcd.instantiate(new TestDispatcher());
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cd.hydrate(null);
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try {
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cd.detectChanges();
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throw new BaseException("fail");
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} catch (e) {
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expect(e).toBeAnInstanceOf(ChangeDetectionError);
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expect(e.location).toEqual("invalidProp in someComponent");
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}
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});
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});
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describe("ContextWithVariableBindings", () => {
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it('should read a field from ContextWithVariableBindings', () => {
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var locals = new ContextWithVariableBindings(null,
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MapWrapper.createFromPairs([["key", "value"]]));
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expect(executeWatch('key', 'key', locals))
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.toEqual(['key=value']);
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});
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it('should invoke a function from ContextWithVariableBindings', () => {
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var locals = new ContextWithVariableBindings(null,
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MapWrapper.createFromPairs([["key", () => "value"]]));
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expect(executeWatch('key', 'key()', locals))
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.toEqual(['key=value']);
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});
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it('should handle nested ContextWithVariableBindings', () => {
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var nested = new ContextWithVariableBindings(null,
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MapWrapper.createFromPairs([["key", "value"]]));
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var locals = new ContextWithVariableBindings(nested, MapWrapper.create());
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expect(executeWatch('key', 'key', locals))
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.toEqual(['key=value']);
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});
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it("should fall back to a regular field read when ContextWithVariableBindings " +
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"does not have the requested field", () => {
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var locals = new ContextWithVariableBindings(new Person("Jim"),
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MapWrapper.createFromPairs([["key", "value"]]));
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expect(executeWatch('name', 'name', locals))
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.toEqual(['name=Jim']);
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});
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});
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describe("handle children", () => {
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var parent, child;
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beforeEach(() => {
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var protoParent = createProtoChangeDetector();
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parent = protoParent.instantiate(null);
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var protoChild = createProtoChangeDetector();
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child = protoChild.instantiate(null);
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});
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it("should add children", () => {
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parent.addChild(child);
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expect(parent.children.length).toEqual(1);
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expect(parent.children[0]).toBe(child);
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});
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it("should remove children", () => {
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parent.addChild(child);
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parent.removeChild(child);
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expect(parent.children).toEqual([]);
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});
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});
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});
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describe("mode", () => {
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it("should not check a detached change detector", () => {
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var c = createChangeDetector('name', 'a', new TestData("value"));
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var cd = c["changeDetector"];
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var dispatcher = c["dispatcher"];
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cd.mode = DETACHED;
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cd.detectChanges();
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expect(dispatcher.log).toEqual([]);
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});
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it("should not check a checked change detector", () => {
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var c = createChangeDetector('name', 'a', new TestData("value"));
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var cd = c["changeDetector"];
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var dispatcher = c["dispatcher"];
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cd.mode = CHECKED;
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cd.detectChanges();
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expect(dispatcher.log).toEqual([]);
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});
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it("should change CHECK_ONCE to CHECKED", () => {
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var cd = createProtoChangeDetector().instantiate(null);
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cd.mode = CHECK_ONCE;
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cd.detectChanges();
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expect(cd.mode).toEqual(CHECKED);
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});
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it("should not change the CHECK_ALWAYS", () => {
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var cd = createProtoChangeDetector().instantiate(null);
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cd.mode = CHECK_ALWAYS;
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cd.detectChanges();
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expect(cd.mode).toEqual(CHECK_ALWAYS);
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});
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});
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describe("markPathToRootAsCheckOnce", () => {
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function changeDetector(mode, parent) {
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var cd = createProtoChangeDetector().instantiate(null);
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cd.mode = mode;
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if (isPresent(parent)) parent.addChild(cd);
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return cd;
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}
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it("should mark all checked detectors as CHECK_ONCE " +
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"until reaching a detached one", () => {
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var root = changeDetector(CHECK_ALWAYS, null);
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var disabled = changeDetector(DETACHED, root);
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var parent = changeDetector(CHECKED, disabled);
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var checkAlwaysChild = changeDetector(CHECK_ALWAYS, parent);
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var checkOnceChild = changeDetector(CHECK_ONCE, checkAlwaysChild);
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var checkedChild = changeDetector(CHECKED, checkOnceChild);
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checkedChild.markPathToRootAsCheckOnce();
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expect(root.mode).toEqual(CHECK_ALWAYS);
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expect(disabled.mode).toEqual(DETACHED);
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expect(parent.mode).toEqual(CHECK_ONCE);
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expect(checkAlwaysChild.mode).toEqual(CHECK_ALWAYS);
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expect(checkOnceChild.mode).toEqual(CHECK_ONCE);
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expect(checkedChild.mode).toEqual(CHECK_ONCE);
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});
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});
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describe("hydration", () => {
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it("should be able to rehydrate a change detector", () => {
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var c = createChangeDetector("memo", "name");
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var cd = c["changeDetector"];
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cd.hydrate("some context");
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expect(cd.hydrated()).toBe(true);
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cd.dehydrate();
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expect(cd.hydrated()).toBe(false);
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cd.hydrate("other context");
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expect(cd.hydrated()).toBe(true);
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});
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it("should destroy all active pipes during dehyration", () => {
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var pipe = new OncePipe();
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var registry = new FakePipeRegistry('pipe', () => pipe);
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var c = createChangeDetector("memo", "name | pipe", new Person('bob'), registry);
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var cd = c["changeDetector"];
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cd.detectChanges();
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cd.dehydrate();
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expect(pipe.destroyCalled).toBe(true);
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});
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});
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describe("pipes", () => {
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it("should support pipes", () => {
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var registry = new FakePipeRegistry('pipe', () => new CountingPipe());
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var ctx = new Person("Megatron");
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var c = createChangeDetector("memo", "name | pipe", ctx, registry);
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var cd = c["changeDetector"];
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var dispatcher = c["dispatcher"];
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cd.detectChanges();
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expect(dispatcher.log).toEqual(['memo=Megatron state:0']);
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dispatcher.clear();
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cd.detectChanges();
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expect(dispatcher.log).toEqual(['memo=Megatron state:1']);
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});
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it("should lookup pipes in the registry when the context is not supported", () => {
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var registry = new FakePipeRegistry('pipe', () => new OncePipe());
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var ctx = new Person("Megatron");
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var c = createChangeDetector("memo", "name | pipe", ctx, registry);
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var cd = c["changeDetector"];
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cd.detectChanges();
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expect(registry.numberOfLookups).toEqual(1);
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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 c = createChangeDetector("memo", "name | pipe", ctx, registry);
|
|
var cd = c["changeDetector"];
|
|
|
|
cd.detectChanges();
|
|
ctx.name = "Optimus Prime";
|
|
cd.detectChanges();
|
|
|
|
expect(pipe.destroyCalled).toEqual(true);
|
|
});
|
|
});
|
|
|
|
it("should do nothing when returns NO_CHANGE", () => {
|
|
var registry = new FakePipeRegistry('pipe', () => new IdentityPipe())
|
|
var ctx = new Person("Megatron");
|
|
|
|
var c = createChangeDetector("memo", "name | pipe", ctx, registry);
|
|
var cd = c["changeDetector"];
|
|
var dispatcher = c["dispatcher"];
|
|
|
|
cd.detectChanges();
|
|
cd.detectChanges();
|
|
|
|
expect(dispatcher.log).toEqual(['memo=Megatron']);
|
|
|
|
ctx.name = "Optimus Prime";
|
|
dispatcher.clear();
|
|
cd.detectChanges();
|
|
|
|
expect(dispatcher.log).toEqual(['memo=Optimus Prime']);
|
|
});
|
|
});
|
|
});
|
|
}
|
|
|
|
class CountingPipe extends Pipe {
|
|
state:number;
|
|
|
|
constructor() {
|
|
super();
|
|
this.state = 0;
|
|
}
|
|
|
|
supports(newValue) {
|
|
return true;
|
|
}
|
|
|
|
transform(value) {
|
|
return `${value} state:${this.state ++}`;
|
|
}
|
|
}
|
|
|
|
class OncePipe extends Pipe {
|
|
called:boolean;
|
|
destroyCalled:boolean;
|
|
|
|
constructor() {
|
|
super();
|
|
this.called = false;;
|
|
this.destroyCalled = false;
|
|
}
|
|
|
|
supports(newValue) {
|
|
return !this.called;
|
|
}
|
|
|
|
onDestroy() {
|
|
this.destroyCalled = true;
|
|
}
|
|
|
|
transform(value) {
|
|
this.called = true;
|
|
return value;
|
|
}
|
|
}
|
|
|
|
class IdentityPipe extends Pipe {
|
|
state:any;
|
|
|
|
supports(newValue) {
|
|
return true;
|
|
}
|
|
|
|
transform(value) {
|
|
if (this.state === value) {
|
|
return NO_CHANGE;
|
|
} else {
|
|
this.state = value;
|
|
return value;
|
|
}
|
|
}
|
|
}
|
|
|
|
class FakePipeRegistry extends PipeRegistry {
|
|
numberOfLookups:number;
|
|
pipeType:string;
|
|
factory:Function;
|
|
|
|
constructor(pipeType, factory) {
|
|
super({});
|
|
this.pipeType = pipeType;
|
|
this.factory = factory;
|
|
this.numberOfLookups = 0;
|
|
}
|
|
|
|
get(type:string, obj) {
|
|
if (type != this.pipeType) return null;
|
|
this.numberOfLookups ++;
|
|
return this.factory();
|
|
}
|
|
}
|
|
|
|
class TestRecord {
|
|
a;
|
|
b;
|
|
c;
|
|
}
|
|
|
|
class Person {
|
|
name:string;
|
|
age:number;
|
|
address:Address;
|
|
constructor(name:string, address:Address = null) {
|
|
this.name = name;
|
|
this.address = address;
|
|
}
|
|
|
|
sayHi(m) {
|
|
return `Hi, ${m}`;
|
|
}
|
|
|
|
toString():string {
|
|
var address = this.address == null ? '' : ' address=' + this.address.toString();
|
|
|
|
return 'name=' + this.name + address;
|
|
}
|
|
}
|
|
|
|
class Address {
|
|
city:string;
|
|
constructor(city:string) {
|
|
this.city = city;
|
|
}
|
|
|
|
toString():string {
|
|
return this.city;
|
|
}
|
|
}
|
|
|
|
class Uninitialized {
|
|
value:any;
|
|
}
|
|
|
|
class TestData {
|
|
a;
|
|
|
|
constructor(a) {
|
|
this.a = a;
|
|
}
|
|
}
|
|
|
|
class TestDispatcher extends ChangeDispatcher {
|
|
log:List;
|
|
loggedValues:List;
|
|
changeRecords:List;
|
|
onChange:Function;
|
|
|
|
constructor() {
|
|
super();
|
|
this.log = null;
|
|
this.loggedValues = null;
|
|
this.onChange = (_, __) => {};
|
|
this.clear();
|
|
}
|
|
|
|
clear() {
|
|
this.log = ListWrapper.create();
|
|
this.loggedValues = ListWrapper.create();
|
|
this.changeRecords = ListWrapper.create();
|
|
}
|
|
|
|
logValue(value) {
|
|
ListWrapper.push(this.loggedValues, value);
|
|
}
|
|
|
|
onRecordChange(group, changeRecords:List) {
|
|
var value = changeRecords[0].change.currentValue;
|
|
var memento = changeRecords[0].bindingMemento;
|
|
ListWrapper.push(this.log, memento + '=' + this._asString(value));
|
|
|
|
var values = ListWrapper.map(changeRecords, (r) => r.change.currentValue);
|
|
ListWrapper.push(this.loggedValues, values);
|
|
|
|
ListWrapper.push(this.changeRecords, changeRecords);
|
|
|
|
this.onChange(group, changeRecords);
|
|
}
|
|
|
|
|
|
_asString(value) {
|
|
return (isBlank(value) ? 'null' : value.toString());
|
|
}
|
|
}
|