555 lines
19 KiB
JavaScript
555 lines
19 KiB
JavaScript
import {ddescribe, describe, it, iit, xit, expect, beforeEach, afterEach, IS_DARTIUM} from 'test_lib/test_lib';
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import {isPresent, isBlank, isJsObject, BaseException, FunctionWrapper} from 'facade/lang';
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import {List, ListWrapper, MapWrapper, StringMapWrapper} from 'facade/collection';
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import {Parser} from 'change_detection/parser/parser';
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import {Lexer} from 'change_detection/parser/lexer';
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import {reflector} from 'reflection/reflection';
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import {arrayChangesAsString, kvChangesAsString} from './util';
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import {ChangeDispatcher, DynamicChangeDetector, ChangeDetectionError, ContextWithVariableBindings}
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from 'change_detection/change_detection';
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import {JitProtoChangeDetector, DynamicProtoChangeDetector} from '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": () => new DynamicProtoChangeDetector(),
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"JIT": () => new JitProtoChangeDetector()
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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, formatters = null,
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structural = false) {
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var pcd = createProtoChangeDetector();
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pcd.addAst(ast(exp), memo, memo, structural);
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var dispatcher = new TestDispatcher();
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var cd = pcd.instantiate(dispatcher, formatters);
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cd.setContext(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, formatters = null,
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content = false) {
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var res = createChangeDetector(memo, exp, context, formatters, content);
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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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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 formatters", () => {
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var formatters = MapWrapper.createFromPairs([
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['uppercase', (v) => v.toUpperCase()],
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['wrap', (v, before, after) => `${before}${v}${after}`]]);
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expect(executeWatch('str', '"aBc" | uppercase', null, formatters)).toEqual(['str=ABC']);
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expect(executeWatch('str', '"b" | wrap:"a":"c"', null, formatters)).toEqual(['str=abc']);
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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", false);
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var dispatcher = new TestDispatcher();
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var cd = pcd.instantiate(dispatcher, MapWrapper.create());
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cd.setContext(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("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, null);
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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, null);
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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.setContext(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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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, null);
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cd.setContext(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(), null);
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cd.setContext(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("collections", () => {
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it("should support null values", () => {
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var context = new TestData(null);
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var c = createChangeDetector('a', 'a', context, null, true);
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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(['a=null']);
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dispatcher.clear();
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context.a = [0];
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cd.detectChanges();
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expect(dispatcher.log).toEqual(["a=" +
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arrayChangesAsString({
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collection: ['0[null->0]'],
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additions: ['0[null->0]']
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})
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]);
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dispatcher.clear();
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context.a = null;
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cd.detectChanges();
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expect(dispatcher.log).toEqual(['a=null']);
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});
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describe("list", () => {
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it("should support list changes", () => {
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var context = new TestData([1, 2]);
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expect(executeWatch("a", "a", context, null, true))
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.toEqual(["a=" +
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arrayChangesAsString({
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collection: ['1[null->0]', '2[null->1]'],
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additions: ['1[null->0]', '2[null->1]']
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})]);
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});
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it("should handle reference changes", () => {
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var context = new TestData([1, 2]);
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var objs = createChangeDetector("a", "a", context, null, true);
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var cd = objs["changeDetector"];
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var dispatcher = objs["dispatcher"];
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cd.detectChanges();
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dispatcher.clear();
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context.a = [2, 1];
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cd.detectChanges();
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expect(dispatcher.log).toEqual(["a=" +
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arrayChangesAsString({
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collection: ['2[1->0]', '1[0->1]'],
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previous: ['1[0->1]', '2[1->0]'],
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moves: ['2[1->0]', '1[0->1]']
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})]);
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});
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});
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describe("map", () => {
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it("should support map changes", () => {
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var map = MapWrapper.create();
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MapWrapper.set(map, "foo", "bar");
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var context = new TestData(map);
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expect(executeWatch("a", "a", context, null, true))
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.toEqual(["a=" +
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kvChangesAsString({
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map: ['foo[null->bar]'],
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additions: ['foo[null->bar]']
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})]);
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});
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it("should handle reference changes", () => {
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var map = MapWrapper.create();
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MapWrapper.set(map, "foo", "bar");
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var context = new TestData(map);
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var objs = createChangeDetector("a", "a", context, null, true);
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var cd = objs["changeDetector"];
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var dispatcher = objs["dispatcher"];
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cd.detectChanges();
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dispatcher.clear();
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context.a = MapWrapper.create();
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MapWrapper.set(context.a, "bar", "foo");
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cd.detectChanges();
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expect(dispatcher.log).toEqual(["a=" +
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kvChangesAsString({
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map: ['bar[null->foo]'],
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previous: ['foo[bar->null]'],
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additions: ['bar[null->foo]'],
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removals: ['foo[bar->null]']
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})]);
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});
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});
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if (!IS_DARTIUM) {
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describe("js objects", () => {
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it("should support object changes", () => {
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var map = {"foo": "bar"};
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var context = new TestData(map);
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expect(executeWatch("a", "a", context, null, true))
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.toEqual(["a=" +
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kvChangesAsString({
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map: ['foo[null->bar]'],
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additions: ['foo[null->bar]']
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})]);
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});
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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 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, null);
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var protoChild = createProtoChangeDetector();
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child = protoChild.instantiate(null, 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("optimizations", () => {
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it("should not rerun formatters when args did not change", () => {
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var count = 0;
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var formatters = MapWrapper.createFromPairs([
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['count', (v) => {count ++; "value"}]]);
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var c = createChangeDetector('a', 'a | count', new TestData(null), formatters);
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var cd = c["changeDetector"];
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cd.detectChanges();
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expect(count).toEqual(1);
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cd.detectChanges();
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expect(count).toEqual(1);
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});
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});
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});
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});
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}
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class TestRecord {
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a;
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b;
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c;
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}
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class Person {
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name:string;
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age:number;
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address:Address;
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constructor(name:string, address:Address = null) {
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this.name = name;
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this.address = address;
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}
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sayHi(m) {
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return `Hi, ${m}`;
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}
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toString():string {
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var address = this.address == null ? '' : ' address=' + this.address.toString();
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return 'name=' + this.name + address;
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}
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}
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class Address {
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city:string;
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constructor(city:string) {
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this.city = city;
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}
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toString():string {
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return this.city;
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}
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}
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class Uninitialized {
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value:any;
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}
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class TestData {
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a;
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constructor(a) {
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this.a = a;
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}
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}
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class TestDispatcher extends ChangeDispatcher {
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log:List;
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loggedValues:List;
|
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onChange:Function;
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constructor() {
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this.log = null;
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this.loggedValues = null;
|
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this.onChange = (_, __) => {};
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this.clear();
|
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}
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clear() {
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this.log = ListWrapper.create();
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this.loggedValues = ListWrapper.create();
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}
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logValue(value) {
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ListWrapper.push(this.loggedValues, value);
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}
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onRecordChange(group, updates:List) {
|
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var value = updates[0].change.currentValue;
|
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var memento = updates[0].bindingMemento;
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ListWrapper.push(this.log, memento + '=' + this._asString(value));
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|
|
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var values = ListWrapper.map(updates, (r) => r.change.currentValue);
|
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ListWrapper.push(this.loggedValues, values);
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|
|
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this.onChange(group, updates);
|
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}
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|
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_asString(value) {
|
|
return (isBlank(value) ? 'null' : value.toString());
|
|
}
|
|
}
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