test: fix default component state test

Author: mtsvyatkova

src/components/tile-manager/tile-manager.spec.ts

@@ -83,6 +83,8 @@ describe('Tile Manager component', () => {
       // TODO: Add checks for other settings when implemented
       expect(tileManager.columnCount).to.equal(10);
       expect(tileManager.dragMode).to.equal('slide');
+      expect(tileManager.minColumnWidth).to.equal(150);
+      expect(tileManager.minRowHeight).to.equal(200);
       expect(tileManager.tiles).lengthOf(2);
     });
 
@@ -115,7 +117,7 @@ describe('Tile Manager component', () => {
       expect(tileManager).shadowDom.to.equal(
         `<div
           part="base"
-          style="--ig-column-count:undefined;--ig-min-col-width:150px;--ig-min-row-height:200px;"
+          style="--ig-column-count:10;--ig-min-col-width:150px;--ig-min-row-height:200px;"
         >
           <slot></slot>
         </div>`

src/components/tile-manager/tile-manager.ts

@@ -47,7 +47,7 @@ export default class IgcTileManagerComponent extends EventEmitterMixin<
 
   private draggedItem: IgcTileComponent | null = null;
   private positionedTiles: IgcTileComponent[] = [];
-  private _columnCount!: number;
+  private _columnCount = 10;
 
   // @query('[part="base"]', true)
   // private _baseWrapper!: HTMLDivElement;