completed

src/main/java/rocks/zipcode/calcskin/CalcSkin.java

     }
 
     private void makeEqualsButton(Button button) {
-        button.setStyle("-fx-base: ghostwhite;");
+        button.setStyle("-fx-base: white;");
         button.setOnAction(new EventHandler<ActionEvent>() {
             @Override
             public void handle(ActionEvent actionEvent) {

src/test/java/rocks/zipcode/calcskin/WhiteBoardTest.java

+package rocks.zipcode.calcskin;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class WhiteBoardTest {
+
+    @Test
+    public void sortTest(){
+        int[] input = new int[]{2, 5, -55, 8, -72, -1, 53};
+        String arrayToString = "";
+        for (int j = 0; j<input.length; j++)
+        for (int i = 0; i < input.length-1; i++) {
+            int temp = input[i++];
+            if(input[i]>input[i++]){
+                input[i++] = input[i];
+                input[i] = temp;
+                arrayToString += input[i] + " ";
+                System.out.println(input[i]);
+            }
+
+
+        }
+
+        String actual = "-72 -55 -1 2 5 8 53";
+
+        Assert.assertEquals(arrayToString, actual);
+    }
+}