Add tests for bar_style and barClassName props of Progress

Author: tcbegley

src/components/__tests__/Progress.test.js

@@ -86,12 +86,23 @@ describe('Progress', () => {
     expect(progressAnimated.firstChild).toHaveClass('progress-bar-animated');
   });
 
-  test('sets className and style on the progress container', () => {
+  test('sets className and style on the progress container and the bar', () => {
     const {
       container: {firstChild: progress}
-    } = render(<Progress style={{height: '40px'}} className="blorp" />);
+    } = render(
+      <Progress
+        style={{height: '40px'}}
+        className="outer"
+        bar_style={{color: 'chartreuse'}}
+        barClassName="inner"
+      />
+    );
 
-    expect(progress).toHaveClass('blorp');
+    expect(progress).toHaveClass('outer');
     expect(progress).toHaveStyle('height:40px');
+
+    expect(progress.firstChild).toHaveClass('progress-bar');
+    expect(progress.firstChild).toHaveClass('inner');
+    expect(progress.firstChild).toHaveStyle('color:chartreuse');
   });
 });