         XCTAssertNotNil(needleImage, "Needle image not loaded")
     }
     
+    func testShadowImageViewCreated() {
+        XCTAssertNotNil(fuelGauge.shadowView, "Shadow view not created.")
+    }
+    
 }

    }
    
    func testBackgroundImageViewCreated() {
        XCTAssertNotNil(fuelGauge.backgroundImage, "Background image not created.")
    }
    
    func testNumberOfSubviews() {

    }
    
    func testNeedleImageViewCreated() {
        XCTAssertNotNil(fuelGauge.needleImage, "Needle view not created.")
    }
    
    func testNeedleSubviewSizedToBounds() {
