Best JavaScript code snippet using storybook-root
NgComponentAnalyzer.test.ts
Source: NgComponentAnalyzer.test.ts
1import {2 Component,3 ComponentFactory,4 ComponentFactoryResolver,5 Directive,6 EventEmitter,7 HostBinding,8 Injectable,9 Input,10 Output,11 Pipe,12 Type,13} from '@angular/core';14import { TestBed } from '@angular/core/testing';15import { BrowserDynamicTestingModule } from '@angular/platform-browser-dynamic/testing';16import {17 getComponentInputsOutputs,18 isComponent,19 isDeclarable,20 getComponentDecoratorMetadata,21} from './NgComponentAnalyzer';22describe('getComponentInputsOutputs', () => {23 it('should return empty if no I/O found', () => {24 @Component({})25 class FooComponent {}26 expect(getComponentInputsOutputs(FooComponent)).toEqual({27 inputs: [],28 outputs: [],29 });30 class BarComponent {}31 expect(getComponentInputsOutputs(BarComponent)).toEqual({32 inputs: [],33 outputs: [],34 });35 });36 it('should return I/O', () => {37 @Component({38 template: '',39 inputs: ['inputInComponentMetadata'],40 outputs: ['outputInComponentMetadata'],41 })42 class FooComponent {43 @Input()44 public input: string;45 @Input('inputPropertyName')46 public inputWithBindingPropertyName: string;47 @Output()48 public output = new EventEmitter<Event>();49 @Output('outputPropertyName')50 public outputWithBindingPropertyName = new EventEmitter<Event>();51 }52 const fooComponentFactory = resolveComponentFactory(FooComponent);53 const { inputs, outputs } = getComponentInputsOutputs(FooComponent);54 expect({ inputs, outputs }).toEqual({55 inputs: [56 { propName: 'inputInComponentMetadata', templateName: 'inputInComponentMetadata' },57 { propName: 'input', templateName: 'input' },58 { propName: 'inputWithBindingPropertyName', templateName: 'inputPropertyName' },59 ],60 outputs: [61 { propName: 'outputInComponentMetadata', templateName: 'outputInComponentMetadata' },62 { propName: 'output', templateName: 'output' },63 { propName: 'outputWithBindingPropertyName', templateName: 'outputPropertyName' },64 ],65 });66 expect(sortByPropName(inputs)).toEqual(sortByPropName(fooComponentFactory.inputs));67 expect(sortByPropName(outputs)).toEqual(sortByPropName(fooComponentFactory.outputs));68 });69 it("should return I/O when some of component metadata has the same name as one of component's properties", () => {70 @Component({71 template: '',72 inputs: ['input', 'inputWithBindingPropertyName'],73 outputs: ['outputWithBindingPropertyName'],74 })75 class FooComponent {76 @Input()77 public input: string;78 @Input('inputPropertyName')79 public inputWithBindingPropertyName: string;80 @Output()81 public output = new EventEmitter<Event>();82 @Output('outputPropertyName')83 public outputWithBindingPropertyName = new EventEmitter<Event>();84 }85 const fooComponentFactory = resolveComponentFactory(FooComponent);86 const { inputs, outputs } = getComponentInputsOutputs(FooComponent);87 expect(sortByPropName(inputs)).toEqual(sortByPropName(fooComponentFactory.inputs));88 expect(sortByPropName(outputs)).toEqual(sortByPropName(fooComponentFactory.outputs));89 });90 it('should return I/O in the presence of multiple decorators', () => {91 @Component({92 template: '',93 })94 class FooComponent {95 @Input()96 @HostBinding('class.preceeding-first')97 public inputPreceedingHostBinding: string;98 @HostBinding('class.following-binding')99 @Input()100 public inputFollowingHostBinding: string;101 }102 const fooComponentFactory = resolveComponentFactory(FooComponent);103 const { inputs, outputs } = getComponentInputsOutputs(FooComponent);104 expect({ inputs, outputs }).toEqual({105 inputs: [106 { propName: 'inputPreceedingHostBinding', templateName: 'inputPreceedingHostBinding' },107 { propName: 'inputFollowingHostBinding', templateName: 'inputFollowingHostBinding' },108 ],109 outputs: [],110 });111 expect(sortByPropName(inputs)).toEqual(sortByPropName(fooComponentFactory.inputs));112 expect(sortByPropName(outputs)).toEqual(sortByPropName(fooComponentFactory.outputs));113 });114 it('should return I/O with extending classes', () => {115 @Component({116 template: '',117 })118 class BarComponent {119 @Input()120 public a: string;121 @Input()122 public b: string;123 }124 @Component({125 template: '',126 })127 class FooComponent extends BarComponent {128 @Input()129 public b: string;130 @Input()131 public c: string;132 }133 const fooComponentFactory = resolveComponentFactory(FooComponent);134 const { inputs, outputs } = getComponentInputsOutputs(FooComponent);135 expect({ inputs, outputs }).toEqual({136 inputs: [137 { propName: 'a', templateName: 'a' },138 { propName: 'b', templateName: 'b' },139 { propName: 'c', templateName: 'c' },140 ],141 outputs: [],142 });143 expect(sortByPropName(inputs)).toEqual(sortByPropName(fooComponentFactory.inputs));144 expect(sortByPropName(outputs)).toEqual(sortByPropName(fooComponentFactory.outputs));145 });146});147describe('isDeclarable', () => {148 it('should return true with a Component', () => {149 @Component({})150 class FooComponent {}151 expect(isDeclarable(FooComponent)).toEqual(true);152 });153 it('should return true with a Directive', () => {154 @Directive({})155 class FooDirective {}156 expect(isDeclarable(FooDirective)).toEqual(true);157 });158 it('should return true with a Pipe', () => {159 @Pipe({ name: 'pipe' })160 class FooPipe {}161 expect(isDeclarable(FooPipe)).toEqual(true);162 });163 it('should return false with simple class', () => {164 class FooPipe {}165 expect(isDeclarable(FooPipe)).toEqual(false);166 });167 it('should return false with Injectable', () => {168 @Injectable()169 class FooInjectable {}170 expect(isDeclarable(FooInjectable)).toEqual(false);171 });172});173describe('isComponent', () => {174 it('should return true with a Component', () => {175 @Component({})176 class FooComponent {}177 expect(isComponent(FooComponent)).toEqual(true);178 });179 it('should return false with simple class', () => {180 class FooPipe {}181 expect(isComponent(FooPipe)).toEqual(false);182 });183 it('should return false with Directive', () => {184 @Directive()185 class FooDirective {}186 expect(isComponent(FooDirective)).toEqual(false);187 });188});189describe('getComponentDecoratorMetadata', () => {190 it('should return Component with a Component', () => {191 @Component({ selector: 'foo' })192 class FooComponent {}193 expect(getComponentDecoratorMetadata(FooComponent)).toBeInstanceOf(Component);194 expect(getComponentDecoratorMetadata(FooComponent)).toEqual({195 changeDetection: 1,196 selector: 'foo',197 });198 });199 it('should return Component with extending classes', () => {200 @Component({ selector: 'bar' })201 class BarComponent {}202 @Component({ selector: 'foo' })203 class FooComponent extends BarComponent {}204 expect(getComponentDecoratorMetadata(FooComponent)).toBeInstanceOf(Component);205 expect(getComponentDecoratorMetadata(FooComponent)).toEqual({206 changeDetection: 1,207 selector: 'foo',208 });209 });210});211function sortByPropName(212 array: {213 propName: string;214 templateName: string;215 }[]216) {217 return array.sort((a, b) => a.propName.localeCompare(b.propName));218}219function resolveComponentFactory<T extends Type<any>>(component: T): ComponentFactory<T> {220 TestBed.configureTestingModule({221 declarations: [component],222 }).overrideModule(BrowserDynamicTestingModule, {223 set: {224 entryComponents: [component],225 },226 });227 const componentFactoryResolver = TestBed.inject(ComponentFactoryResolver);228 return componentFactoryResolver.resolveComponentFactory(component);...
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