Add PDF export grid integration tests

Co-authored-by: kdinev <[email protected]>

Author: Copilot

projects/igniteui-angular/src/lib/services/pdf/pdf-exporter-grid.spec.ts

@@ -0,0 +1,98 @@
+import { TestBed, waitForAsync } from '@angular/core/testing';
+import { IgxGridComponent } from '../../grids/grid/grid.component';
+import { ExportUtilities } from '../exporter-common/export-utilities';
+import { IgxPdfExporterService } from './pdf-exporter';
+import { IgxPdfExporterOptions } from './pdf-exporter-options';
+import { GridIDNameJobTitleComponent } from '../../test-utils/grid-samples.spec';
+import { first } from 'rxjs/operators';
+import { NoopAnimationsModule } from '@angular/platform-browser/animations';
+
+describe('PDF Grid Exporter', () => {
+    let exporter: IgxPdfExporterService;
+    let options: IgxPdfExporterOptions;
+
+    beforeEach(waitForAsync(() => {
+        TestBed.configureTestingModule({
+            imports: [
+                NoopAnimationsModule,
+                GridIDNameJobTitleComponent
+            ]
+        }).compileComponents();
+    }));
+
+    beforeEach(() => {
+        exporter = new IgxPdfExporterService();
+        options = new IgxPdfExporterOptions('PdfGridExport');
+
+        // Spy the saveBlobToFile method so the files are not really created
+        spyOn(ExportUtilities as any, 'saveBlobToFile');
+    });
+
+    afterEach(() => {
+        exporter.columnExporting.unsubscribe();
+        exporter.rowExporting.unsubscribe();
+    });
+
+    it('should export grid as displayed.', (done) => {
+        const fix = TestBed.createComponent(GridIDNameJobTitleComponent);
+        fix.detectChanges();
+
+        const grid = fix.componentInstance.grid;
+        
+        exporter.exportEnded.pipe(first()).subscribe(() => {
+            expect(ExportUtilities.saveBlobToFile).toHaveBeenCalledTimes(1);
+            done();
+        });
+
+        exporter.export(grid, options);
+    });
+
+    it('should export grid with custom page orientation', (done) => {
+        const fix = TestBed.createComponent(GridIDNameJobTitleComponent);
+        fix.detectChanges();
+
+        const grid = fix.componentInstance.grid;
+        options.pageOrientation = 'landscape';
+        
+        exporter.exportEnded.pipe(first()).subscribe(() => {
+            expect(ExportUtilities.saveBlobToFile).toHaveBeenCalledTimes(1);
+            done();
+        });
+
+        exporter.export(grid, options);
+    });
+
+    it('should honor ignoreColumnsVisibility option', (done) => {
+        const fix = TestBed.createComponent(GridIDNameJobTitleComponent);
+        fix.detectChanges();
+
+        const grid = fix.componentInstance.grid;
+        grid.columnList.get(0).hidden = true;
+        options.ignoreColumnsVisibility = false;
+
+        fix.detectChanges();
+        
+        exporter.exportEnded.pipe(first()).subscribe(() => {
+            expect(ExportUtilities.saveBlobToFile).toHaveBeenCalledTimes(1);
+            done();
+        });
+
+        exporter.export(grid, options);
+    });
+
+    it('should handle empty grid', (done) => {
+        const fix = TestBed.createComponent(GridIDNameJobTitleComponent);
+        fix.detectChanges();
+
+        const grid = fix.componentInstance.grid;
+        grid.data = [];
+        fix.detectChanges();
+        
+        exporter.exportEnded.pipe(first()).subscribe(() => {
+            expect(ExportUtilities.saveBlobToFile).toHaveBeenCalledTimes(1);
+            done();
+        });
+
+        exporter.export(grid, options);
+    });
+});