forked from storybookjs/storybook
/
NgComponentAnalyzer.test.ts
123 lines (100 loc) 路 3.59 KB
/
NgComponentAnalyzer.test.ts
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import {
Component,
ComponentFactory,
ComponentFactoryResolver,
EventEmitter,
Input,
Output,
Type,
} from '@angular/core';
import { TestBed } from '@angular/core/testing';
import { BrowserDynamicTestingModule } from '@angular/platform-browser-dynamic/testing';
import { getComponentInputsOutputs } from './NgComponentAnalyzer';
describe('getComponentInputsOutputs', () => {
it('should return empty if no I/O found', () => {
@Component({})
class FooComponent {}
expect(getComponentInputsOutputs(FooComponent)).toEqual({
inputs: [],
outputs: [],
});
class BarComponent {}
expect(getComponentInputsOutputs(BarComponent)).toEqual({
inputs: [],
outputs: [],
});
});
it('should return I/O', () => {
@Component({
template: '',
inputs: ['inputInComponentMetadata'],
outputs: ['outputInComponentMetadata'],
})
class FooComponent {
@Input()
public input: string;
@Input('inputPropertyName')
public inputWithBindingPropertyName: string;
@Output()
public output = new EventEmitter<Event>();
@Output('outputPropertyName')
public outputWithBindingPropertyName = new EventEmitter<Event>();
}
const fooComponentFactory = resolveComponentFactory(FooComponent);
const { inputs, outputs } = getComponentInputsOutputs(FooComponent);
expect({ inputs, outputs }).toEqual({
inputs: [
{ propName: 'inputInComponentMetadata', templateName: 'inputInComponentMetadata' },
{ propName: 'input', templateName: 'input' },
{ propName: 'inputWithBindingPropertyName', templateName: 'inputPropertyName' },
],
outputs: [
{ propName: 'outputInComponentMetadata', templateName: 'outputInComponentMetadata' },
{ propName: 'output', templateName: 'output' },
{ propName: 'outputWithBindingPropertyName', templateName: 'outputPropertyName' },
],
});
expect(sortByPropName(inputs)).toEqual(sortByPropName(fooComponentFactory.inputs));
expect(sortByPropName(outputs)).toEqual(sortByPropName(fooComponentFactory.outputs));
});
it("should return I/O when some of component metadata has the same name as one of component's properties", () => {
@Component({
template: '',
inputs: ['input', 'inputWithBindingPropertyName'],
outputs: ['outputWithBindingPropertyName'],
})
class FooComponent {
@Input()
public input: string;
@Input('inputPropertyName')
public inputWithBindingPropertyName: string;
@Output()
public output = new EventEmitter<Event>();
@Output('outputPropertyName')
public outputWithBindingPropertyName = new EventEmitter<Event>();
}
const fooComponentFactory = resolveComponentFactory(FooComponent);
const { inputs, outputs } = getComponentInputsOutputs(FooComponent);
expect(sortByPropName(inputs)).toEqual(sortByPropName(fooComponentFactory.inputs));
expect(sortByPropName(outputs)).toEqual(sortByPropName(fooComponentFactory.outputs));
});
});
function sortByPropName(
array: {
propName: string;
templateName: string;
}[]
) {
return array.sort((a, b) => a.propName.localeCompare(b.propName));
}
function resolveComponentFactory<T extends Type<any>>(component: T): ComponentFactory<T> {
TestBed.configureTestingModule({
declarations: [component],
}).overrideModule(BrowserDynamicTestingModule, {
set: {
entryComponents: [component],
},
});
const componentFactoryResolver = TestBed.inject(ComponentFactoryResolver);
return componentFactoryResolver.resolveComponentFactory(component);
}