Add spec

packages/datagrid/tests/src/datagrid.spec.ts

@@ -0,0 +1,19 @@
+// Copyright (c) Jupyter Development Team.
+// Distributed under the terms of the Modified BSD License.
+import { expect } from 'chai';
+
+import { DataGrid } from '@lumino/datagrid';
+
+describe('@lumino/datagrid', () => {
+  let datagrid: DataGrid;
+  beforeEach(() => {
+    datagrid = new DataGrid();
+  });
+  describe('DataGrid', () => {
+    describe('currentViewport()', () => {
+      it('should return the viewport', () => {
+        expect(datagrid.currentViewport).to.be.undefined;
+      });
+    });
+  });
+});

packages/datagrid/tests/src/index.spec.ts

@@ -3,3 +3,4 @@
 
 import './textrenderer.spec';
 import './imagerenderer.spec';
+import './datagrid.spec';