fix(Grid): Add border to rendered height calc.

Author: MayaKirova

projects/igniteui-angular/grids/grid/src/grid-base.directive.ts

@@ -7234,20 +7234,24 @@ export abstract class IgxGridBaseDirective implements GridType,
         if (!this._height) {
             return null;
         }
+        const styles = this.document.defaultView.getComputedStyle(this.nativeElement);
         const actualTheadRow = this.getTheadRowHeight();
         const footerHeight = this.getFooterHeight();
         const toolbarHeight = this.getToolbarHeight();
         const pagingHeight = this.getPagingFooterHeight();
         const groupAreaHeight = this.getGroupAreaHeight();
         const scrHeight = this.getComputedHeight(this.scr.nativeElement);
+        const borderTop = parseFloat(styles.getPropertyValue('border-top'));
+        const borderBottom = parseFloat(styles.getPropertyValue('border-bottom'));
+
         const renderedHeight = toolbarHeight + actualTheadRow +
             footerHeight + pagingHeight + groupAreaHeight +
-            scrHeight;
+            scrHeight + borderTop + borderBottom;
 
         let gridHeight = 0;
 
         if (this.isPercentHeight) {
-            const computed = this.document.defaultView.getComputedStyle(this.nativeElement).getPropertyValue('height');
+            const computed = styles.getPropertyValue('height');
             const autoSize = this._shouldAutoSize(renderedHeight);
             if (autoSize || computed.indexOf('%') !== -1) {
                 const bodyHeight = this.getDataBasedBodyHeight();

src/app/grid-auto-size/grid-auto-size.sample.scss

@@ -11,3 +11,8 @@
     margin-bottom: 16px;
     max-width: 900px;
 }
+
+
+igx-grid {
+    border: 1px solid lightgray;
+  }