alfresco-ng2-components/lib/core/viewer/components/img-viewer.component.spec.ts

/*!
 * @license
 * Copyright 2019 Alfresco Software, Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { SimpleChange } from '@angular/core';
import { ComponentFixture, TestBed } from '@angular/core/testing';
import { ContentService } from '../../services/content.service';

import { ImgViewerComponent } from './img-viewer.component';
import { setupTestBed } from '../../testing/setup-test-bed';
import { AppConfigService } from '@alfresco/adf-core';
import { CoreTestingModule } from '../../testing/core.testing.module';
import { TranslateModule } from '@ngx-translate/core';

describe('Test Img viewer component ', () => {

    let component: ImgViewerComponent;
    let service: ContentService;
    let fixture: ComponentFixture<ImgViewerComponent>;
    let element: HTMLElement;

    function createFakeBlob() {
        const data = atob('iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==');
        return new Blob([data], { type: 'image/png' });
    }

    setupTestBed({
        imports: [
            TranslateModule.forRoot(),
            CoreTestingModule
        ]
    });

    describe('Url', () => {

        beforeEach(() => {
            service = TestBed.inject(ContentService);
            fixture = TestBed.createComponent(ImgViewerComponent);

            element = fixture.nativeElement;
            component = fixture.componentInstance;
            component.urlFile = 'fake-url-file.png';
            fixture.detectChanges();
        });

        it('should display current scale as percent string', () => {
            component.scaleX = 0.5;
            expect(component.currentScaleText).toBe('50%');

            component.scaleX = 1.0;
            expect(component.currentScaleText).toBe('100%');
        });

        it('should generate transform settings', () => {
            component.scaleX = 1.0;
            component.scaleY = 2.0;
            component.rotate = 10;
            component.offsetX = 20;
            component.offsetY = 30;

            fixture.detectChanges();

            const elementCss: any = element.querySelector('#adf-image-container');

            expect(elementCss.style.transform).toBe('scale(1, 2) rotate(10deg) translate(20px, 30px)');
        });

        it('should start drag on mouse down', () => {
            expect(component.isDragged).toBeFalsy();

            component.onMouseDown(<any> new CustomEvent('mousedown'));

            expect(component.isDragged).toBeTruthy();
        });

        it('should prevent default behaviour on mouse down', () => {
            const event = jasmine.createSpyObj('mousedown', ['preventDefault']);

            component.onMouseDown(event);

            expect(event.preventDefault).toHaveBeenCalled();
        });

        it('should prevent default mouse move during drag', () => {
            const event = jasmine.createSpyObj('mousemove', ['preventDefault']);

            component.onMouseDown(<any> new CustomEvent('mousedown'));
            component.onMouseMove(event);

            expect(event.preventDefault).toHaveBeenCalled();
        });

        it('should not prevent default mouse move if not dragged', () => {
            const event = jasmine.createSpyObj('mousemove', ['preventDefault']);

            component.onMouseMove(event);

            expect(component.isDragged).toBeFalsy();
            expect(event.preventDefault).not.toHaveBeenCalled();
        });

        it('should prevent default mouse up during drag end', () => {
            const event = jasmine.createSpyObj('mouseup', ['preventDefault']);

            component.onMouseDown(<any> new CustomEvent('mousedown'));
            expect(component.isDragged).toBeTruthy();

            component.onMouseUp(event);
            expect(event.preventDefault).toHaveBeenCalled();
        });

        it('should stop drag on mouse up', () => {
            component.onMouseDown(<any> new CustomEvent('mousedown'));
            expect(component.isDragged).toBeTruthy();

            component.onMouseUp(<any> new CustomEvent('mouseup'));
            expect(component.isDragged).toBeFalsy();
        });

        it('should stop drag on mouse leave', () => {
            component.onMouseDown(<any> new CustomEvent('mousedown'));
            expect(component.isDragged).toBeTruthy();

            component.onMouseLeave(<any> new CustomEvent('mouseleave'));
            expect(component.isDragged).toBeFalsy();
        });

        it('should stop drag on mouse out', () => {
            component.onMouseDown(<any> new CustomEvent('mousedown'));
            expect(component.isDragged).toBeTruthy();

            component.onMouseOut(<any> new CustomEvent('mouseout'));
            expect(component.isDragged).toBeFalsy();
        });

        it('should update offset on keydown ArrowDown event', () => {
            const arrowDownEvent = new KeyboardEvent('keydown', { key : 'ArrowDown' });
            component.onKeyDown(arrowDownEvent);
            expect(component.offsetY).toBe(4);

            component.onKeyDown(arrowDownEvent);
            expect(component.offsetY).toBe(8);
        });

        it('should update offset on keydown ArrowUp event', () => {
            const arrowUpEvent = new KeyboardEvent('keydown', { key : 'ArrowUp' });
            component.onKeyDown(arrowUpEvent);
            expect(component.offsetY).toBe(-4);

            component.onKeyDown(arrowUpEvent);
            expect(component.offsetY).toBe(-8);
        });

        it('should update offset on keydown ArrowLeft event', () => {
            const arrowLeftEvent = new KeyboardEvent('keydown', { key : 'ArrowLeft' });
            component.onKeyDown(arrowLeftEvent);
            expect(component.offsetX).toBe(-4);

            component.onKeyDown(arrowLeftEvent);
            expect(component.offsetX).toBe(-8);
        });

        it('should update offset on keydown ArrowRight event', () => {
            const arrowRightEvent = new KeyboardEvent('keydown', { key : 'ArrowRight' });
            component.onKeyDown(arrowRightEvent);
            expect(component.offsetX).toBe(4);

            component.onKeyDown(arrowRightEvent);
            expect(component.offsetX).toBe(8);
        });

        it('should update scales on zoom in', () => {
            component.scaleX = 1.0;

            component.zoomIn();
            expect(component.scaleX).toBe(1.2);
            expect(component.scaleY).toBe(1.2);

            component.zoomIn();
            expect(component.scaleX).toBe(1.4);
            expect(component.scaleY).toBe(1.4);
        });

        it('should update scales on zoom out', () => {
            component.scaleX = 1.0;

            component.zoomOut();
            expect(component.scaleX).toBe(0.8);
            expect(component.scaleY).toBe(0.8);

            component.zoomOut();
            expect(component.scaleX).toBe(0.6);
            expect(component.scaleY).toBe(0.6);
        });

        it('should not zoom out past 20%', () => {
            component.scaleX = 0.4;

            component.zoomOut();
            component.zoomOut();
            component.zoomOut();

            expect(component.scaleX).toBe(0.2);
        });

        it('should update angle by 90 degrees on rotate left', () => {
            component.rotate = 0;

            component.rotateLeft();
            expect(component.rotate).toBe(-90);

            component.rotateLeft();
            expect(component.rotate).toBe(-180);
        });

        it('should reset to 0 degrees for full rotate left round', () => {
            component.rotate = -270;

            component.rotateLeft();
            expect(component.rotate).toBe(0);
        });

        it('should update angle by 90 degrees on rotate right', () => {
            component.rotate = 0;

            component.rotateRight();
            expect(component.rotate).toBe(90);

            component.rotateRight();
            expect(component.rotate).toBe(180);
        });

        it('should reset to 0 degrees for full rotate right round', () => {
            component.rotate = 270;

            component.rotateRight();
            expect(component.rotate).toBe(0);
        });

        it('should reset all image modifications', () => {
            component.rotate = 10;
            component.scaleX = 20;
            component.scaleY = 30;
            component.offsetX = 40;
            component.offsetY = 50;

            component.reset();

            expect(component.rotate).toBe(0);
            expect(component.scaleX).toBe(1.0);
            expect(component.scaleY).toBe(1.0);
            expect(component.offsetX).toBe(0);
            expect(component.offsetY).toBe(0);
        });
    });

    describe('Blob', () => {

        beforeEach(() => {
            service = TestBed.inject(ContentService);
            fixture = TestBed.createComponent(ImgViewerComponent);

            element = fixture.nativeElement;
            component = fixture.componentInstance;
            fixture.detectChanges();
        });

        it('If no url or blob are passed should thrown an error', () => {
            const change = new SimpleChange(null, null, true);
            expect(() => {
                component.ngOnChanges({ 'blobFile': change });
            }).toThrow(new Error('Attribute urlFile or blobFile is required'));
        });

        it('If  url is passed should not thrown an error', () => {
            component.urlFile = 'fake-url';
            expect(() => {
                component.ngOnChanges(null);
            }).not.toThrow(new Error('Attribute urlFile or blobFile is required'));
        });

        it('The file Name should be present in the alt attribute', () => {
            component.nameFile = 'fake-name';
            fixture.detectChanges();
            expect(element.querySelector('#viewer-image').getAttribute('alt')).toEqual('fake-name');
        });

        it('If blob is passed should not thrown an error', () => {
            const blob = createFakeBlob();

            spyOn(service, 'createTrustedUrl').and.returnValue('fake-blob-url');
            const change = new SimpleChange(null, blob, true);
            expect(() => {
                component.ngOnChanges({ 'blobFile': change });
            }).not.toThrow(new Error('Attribute urlFile or blobFile is required'));
            expect(component.urlFile).toEqual('fake-blob-url');
        });
    });

    describe('Zoom customization', () => {

        beforeEach(() => {
            service = TestBed.inject(ContentService);
            fixture = TestBed.createComponent(ImgViewerComponent);

            element = fixture.nativeElement;
            component = fixture.componentInstance;
            component.urlFile = 'fake-url-file.png';
            fixture.detectChanges();
        });

        describe('default value', () => {

            it('should use default zoom if is not present a custom zoom in the app.config', () => {
                fixture.detectChanges();
                expect(component.scaleX).toBe(1.0);
                expect(component.scaleY).toBe(1.0);
            });

        });

        describe('custom value', () => {

            beforeEach(() => {
                const appConfig: AppConfigService = TestBed.inject(AppConfigService);
                appConfig.config['adf-viewer.image-viewer-scaling'] = 70;
                component.initializeScaling();
            });

            it('should use the custom zoom if it is present in the app.config', (done) => {
                fixture.detectChanges();

                fixture.whenStable().then(() => {
                    expect(component.scaleX).toBe(0.70);
                    expect(component.scaleY).toBe(0.70);
                    done();
                });
            });
        });
   });
});