test(theme-shared): add chart.component.spec

npm/ng-packs/jest.config.js

@@ -11,7 +11,7 @@ module.exports = {
   coverageDirectory: '<rootDir>/coverage',
   coverageReporters: ['html'],
   preset: 'jest-preset-angular',
-  setupFilesAfterEnv: ['<rootDir>/test-setup.ts'],
+  setupFilesAfterEnv: ['<rootDir>/test-setup.ts', 'jest-canvas-mock'],
   snapshotSerializers: [
     'jest-preset-angular/AngularSnapshotSerializer.js',
     'jest-preset-angular/HTMLCommentSerializer.js',

npm/ng-packs/package.json

@@ -52,6 +52,7 @@
     "font-awesome": "^4.7.0",
     "husky": "^3.0.9",
     "jest": "^24.9.0",
+    "jest-canvas-mock": "^2.1.2",
     "jest-preset-angular": "^7.1.1",
     "just-clone": "3.1.0",
     "just-compare": "^1.3.0",

npm/ng-packs/packages/theme-shared/src/lib/components/chart/chart.component.ts

@@ -6,7 +6,7 @@ import {
   Input,
   OnDestroy,
   Output,
-  ChangeDetectorRef
+  ChangeDetectorRef,
 } from '@angular/core';
 import { BehaviorSubject } from 'rxjs';
 import { chartJsLoaded$ } from '../../utils/widget-utils';
@@ -14,7 +14,7 @@ declare const Chart: any;
 
 @Component({
   selector: 'abp-chart',
-  templateUrl: './chart.component.html'
+  templateUrl: './chart.component.html',
 })
 export class ChartComponent implements AfterViewInit, OnDestroy {
   @Input() type: string;
@@ -61,30 +61,33 @@ export class ChartComponent implements AfterViewInit, OnDestroy {
 
   ngAfterViewInit() {
     chartJsLoaded$.subscribe(() => {
-      try {
+      this.testChartJs();
-        // tslint:disable-next-line: no-unused-expression
-        Chart;
-      } catch (error) {
-        console.error(`Chart is not found. Import the Chart from app.module like shown below:
-        import('chart.js');
-        `);
-        return;
-      }
 
       this.initChart();
       this._initialized = true;
     });
   }
 
+  testChartJs() {
+    try {
+      // tslint:disable-next-line: no-unused-expression
+      Chart;
+    } catch (error) {
+      throw new Error(`Chart is not found. Import the Chart from app.module like shown below:
+      import('chart.js');
+      `);
+    }
+  }
+
   onCanvasClick = event => {
     if (this.chart) {
       const element = this.chart.getElementAtEvent(event);
       const dataset = this.chart.getDatasetAtEvent(event);
-      if (element && element[0] && dataset) {
+      if (element && element.length && dataset) {
         this.onDataSelect.emit({
           originalEvent: event,
           element: element[0],
-          dataset
+          dataset,
         });
       }
     }
@@ -99,11 +102,11 @@ export class ChartComponent implements AfterViewInit, OnDestroy {
       opts.maintainAspectRatio = false;
     }
 
-    this.chart = new Chart(this.el.nativeElement.children[0].children[0], {
+    this.chart = new Chart(this.canvas, {
       type: this.type,
       data: this.data,
       options: this.options,
-      plugins: this.plugins
+      plugins: this.plugins,
     });
 
     this.cdRef.detectChanges();

npm/ng-packs/packages/theme-shared/src/lib/tests/chart.component.spec.ts

@@ -0,0 +1,126 @@
+import { createHostFactory, SpectatorHost } from '@ngneat/spectator/jest';
+import { ChartComponent } from '../components';
+import { chartJsLoaded$ } from '../utils/widget-utils';
+import { ReplaySubject } from 'rxjs';
+import * as widgetUtils from '../utils/widget-utils';
+// import 'chart.js';
+declare const Chart;
+
+Object.defineProperty(window, 'getComputedStyle', {
+  value: () => ({
+    getPropertyValue: prop => {
+      return '';
+    },
+  }),
+});
+
+describe('ChartComponent', () => {
+  let spectator: SpectatorHost<ChartComponent>;
+  const createHost = createHostFactory({ component: ChartComponent });
+
+  beforeEach(() => {
+    (widgetUtils as any).chartJsLoaded$ = new ReplaySubject(1);
+    spectator = createHost('<abp-chart [data]="data" type="polarArea"></abp-chart>', {
+      hostProps: {
+        data: {
+          datasets: [
+            {
+              data: [11],
+              backgroundColor: ['#FF6384'],
+              label: 'My dataset',
+            },
+          ],
+          labels: ['Red'],
+        },
+      },
+    });
+  });
+
+  test('should throw error when chart.js is not loaded', () => {
+    try {
+      spectator.component.testChartJs();
+    } catch (error) {
+      expect(error.message).toContain('Chart is not found');
+    }
+  });
+
+  test('should have a success class by default', async done => {
+    await import('chart.js');
+
+    chartJsLoaded$.next();
+    setTimeout(() => {
+      expect(spectator.component.chart).toBeTruthy();
+      done();
+    }, 0);
+  });
+
+  describe('#reinit', () => {
+    it('should call the destroy method', done => {
+      chartJsLoaded$.next();
+      const spy = jest.spyOn(spectator.component.chart, 'destroy');
+      spectator.setHostInput({
+        data: {
+          datasets: [
+            {
+              data: [12],
+              label: 'My dataset',
+            },
+          ],
+          labels: ['Red'],
+        },
+      });
+      spectator.detectChanges();
+      setTimeout(() => {
+        expect(spy).toHaveBeenCalled();
+        done();
+      }, 0);
+    });
+  });
+
+  describe('#refresh', () => {
+    it('should call the update method', done => {
+      chartJsLoaded$.next();
+      const spy = jest.spyOn(spectator.component.chart, 'update');
+      spectator.component.refresh();
+      setTimeout(() => {
+        expect(spy).toHaveBeenCalled();
+        done();
+      }, 0);
+    });
+  });
+
+  describe('#generateLegend', () => {
+    it('should call the generateLegend method', done => {
+      chartJsLoaded$.next();
+      const spy = jest.spyOn(spectator.component.chart, 'generateLegend');
+      spectator.component.generateLegend();
+      setTimeout(() => {
+        expect(spy).toHaveBeenCalled();
+        done();
+      }, 0);
+    });
+  });
+
+  describe('#onCanvasClick', () => {
+    it('should emit the onDataSelect', done => {
+      spectator.component.onDataSelect.subscribe(() => {
+        done();
+      });
+
+      chartJsLoaded$.next();
+      jest.spyOn(spectator.component.chart, 'getElementAtEvent').mockReturnValue([document.createElement('div')]);
+      spectator.click('canvas');
+    });
+  });
+
+  describe('#base64Image', () => {
+    it('should return the base64 image', done => {
+      chartJsLoaded$.next();
+
+      setTimeout(() => {
+        expect(spectator.component.base64Image).toContain('base64');
+        done();
+      }, 0);
+    });
+  });
+});

npm/ng-packs/test-setup.ts

@@ -1 +1,2 @@
 import 'jest-preset-angular';
+import 'jest-canvas-mock';