chore(*): Update tests so that they don't scroll and then focus the grid as that reset scroll to 0.

Author: MKirova

projects/igniteui-angular/src/lib/grids/hierarchical-grid/hierarchical-grid-navigation.service.ts

@@ -102,7 +102,7 @@ export class IgxHierarchicalGridNavigationService extends IgxGridNavigationServi
     }
 
     focusTbody(event) {
-        if (!this.activeNode || !this.activeNode.row) {
+        if (!this.activeNode || this.activeNode.row === null) {
             this.activeNode = {
                 row: 0,
                 column: 0

projects/igniteui-angular/src/lib/grids/hierarchical-grid/hierarchical-grid.navigation.spec.ts

@@ -37,6 +37,7 @@ describe('IgxHierarchicalGrid Basic Navigation #hGrid', () => {
         hierarchicalGrid = fixture.componentInstance.hgrid;
         setupHierarchicalGridScrollDetection(fixture, hierarchicalGrid);
         baseHGridContent = GridFunctions.getGridContent(fixture);
+        GridFunctions.focusFirstCell(fixture);
     }));
 
     // simple tests
@@ -660,6 +661,7 @@ describe('IgxHierarchicalGrid Complex Navigation #hGrid', () => {
             hierarchicalGrid = fixture.componentInstance.hgrid;
             setupHierarchicalGridScrollDetection(fixture, hierarchicalGrid);
             baseHGridContent = GridFunctions.getGridContent(fixture);
+            GridFunctions.focusFirstCell(fixture);
         }));
 
         // complex tests
@@ -785,6 +787,7 @@ describe('IgxHierarchicalGrid sibling row islands Navigation #hGrid', () => {
         hierarchicalGrid = fixture.componentInstance.hgrid;
         setupHierarchicalGridScrollDetection(fixture, hierarchicalGrid);
         baseHGridContent = GridFunctions.getGridContent(fixture);
+        GridFunctions.focusFirstCell(fixture);
     }));
 
     it('should allow navigating up between sibling child grids.', (async () => {
@@ -912,6 +915,7 @@ describe('IgxHierarchicalGrid Smaller Child Navigation #hGrid', () => {
         hierarchicalGrid = fixture.componentInstance.hgrid;
         setupHierarchicalGridScrollDetection(fixture, hierarchicalGrid);
         baseHGridContent = GridFunctions.getGridContent(fixture);
+        GridFunctions.focusFirstCell(fixture);
     }));
 
     it('should navigate to last cell in next row for child grid using Arrow Down from last cell of parent with more columns', (async () => {