tests for withScrollBar() wrapper

public/app/core/components/ScrollBar/__snapshots__/withScrollBar.test.tsx.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`withScrollBar renders correctly 1`] = `
+<div
+  className="custom-scrollbars"
+  style={
+    Object {
+      "height": "auto",
+      "maxHeight": "100%",
+      "minHeight": "100%",
+      "overflow": "hidden",
+      "position": "relative",
+      "width": "100%",
+    }
+  }
+>
+  <div
+    className="view"
+    style={
+      Object {
+        "WebkitOverflowScrolling": "touch",
+        "bottom": undefined,
+        "left": undefined,
+        "marginBottom": 0,
+        "marginRight": 0,
+        "maxHeight": "calc(100% + 0px)",
+        "minHeight": "calc(100% + 0px)",
+        "overflow": "scroll",
+        "position": "relative",
+        "right": undefined,
+        "top": undefined,
+      }
+    }
+  >
+    <div
+      className="my-component"
+    />
+  </div>
+  <div
+    className="track-horizontal"
+    style={
+      Object {
+        "display": "none",
+        "height": 6,
+        "opacity": 0,
+        "position": "absolute",
+        "transition": "opacity 200ms",
+      }
+    }
+  >
+    <div
+      className="thumb-horizontal"
+      style={
+        Object {
+          "display": "block",
+          "height": "100%",
+          "position": "relative",
+        }
+      }
+    />
+  </div>
+  <div
+    className="track-vertical"
+    style={
+      Object {
+        "display": "none",
+        "opacity": 0,
+        "position": "absolute",
+        "transition": "opacity 200ms",
+        "width": 6,
+      }
+    }
+  >
+    <div
+      className="thumb-vertical"
+      style={
+        Object {
+          "display": "block",
+          "position": "relative",
+          "width": "100%",
+        }
+      }
+    />
+  </div>
+</div>
+`;

public/app/core/components/ScrollBar/withScrollBar.test.tsx

+import React from 'react';
+import renderer from 'react-test-renderer';
+import withScrollBar from './withScrollBar';
+
+class TestComponent extends React.Component {
+  render() {
+    return <div className="my-component" />;
+  }
+}
+
+describe('withScrollBar', () => {
+  it('renders correctly', () => {
+    const TestComponentWithScroll = withScrollBar(TestComponent);
+    const tree = renderer
+      .create(
+        <TestComponentWithScroll>
+          <p>Scrollable content</p>
+        </TestComponentWithScroll>
+      )
+      .toJSON();
+    expect(tree).toMatchSnapshot();
+  });
+});