added some test cases and started fortune method

MathMethods.java

@@ -52,6 +52,8 @@ public class MathMethods
 
     }
 
+    //**********************************************************
+    //Errors in iSin, returns NaN
     public static double iSin(double n1){
         return (Math.asin(n1));
 
@@ -67,7 +69,12 @@ public class MathMethods
 
     }
 
-    
+    public static String fortuneCookie() {
+     String[] wiseWords = new String[] {"You're a hard worker and you will do great on all the labs!", 
+         "Look how much java you learned this week! That's awesome!", "Keep up the good Work" ,
+        "Don't forget to talk to our visitors, they give us jobs!"};  
+        return "";
+    }
     
     public static void printAns(String printAnswer){
         System.out.println("ANSWER: " + printAnswer);

MathMethodsTest.java

@@ -0,0 +1,70 @@
+
+
+import static org.junit.Assert.*;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * The test class MathMethodsTest.
+ *
+ * @author  (your name)
+ * @version (a version number or a date)
+ */
+public class MathMethodsTest
+{
+    /**
+     * Default constructor for test class MathMethodsTest
+     */
+    public MathMethodsTest()
+    {
+    }
+
+    /**
+     * Sets up the test fixture.
+     *
+     * Called before every test case method.
+     */
+    @Before
+    public void setUp()
+    {
+    }
+
+    /**
+     * Tears down the test fixture.
+     *
+     * Called after every test case method.
+     */
+    @After
+    public void tearDown()
+    {
+    }
+
+    @Test
+    public void testSquareRoot()
+    {
+        assertEquals(16.0, MathMethods.squareRoot(256), 0.1);
+    }
+
+    @Test
+    public void testInvertPositive()
+    {
+        assertEquals(-5.0, MathMethods.invert(5), 0.1);
+    }
+
+    @Test
+    public void testInvertNegative()
+    {
+        assertEquals(11.0, MathMethods.invert(-11), 0.1);
+    }
+
+    @Test
+    public void testSin()
+    {
+        assertEquals(-0.26237485370392877, MathMethods.sin(50), 0.1);
+    }
+}
+
+
+
+

package.bluej

@@ -1,24 +1,24 @@
 #BlueJ package file
-dependency1.from=MainApplication
-dependency1.to=Console
+dependency1.from=Calculator
+dependency1.to=MathMethods
 dependency1.type=UsesDependency
-dependency2.from=Console
-dependency2.to=Calculator
+dependency2.from=MathMethodsTest
+dependency2.to=MathMethods
 dependency2.type=UsesDependency
-editor.fx.0.height=1020
-editor.fx.0.width=1247
-editor.fx.0.x=1891
-editor.fx.0.y=66
+editor.fx.0.height=0
+editor.fx.0.width=0
+editor.fx.0.x=0
+editor.fx.0.y=0
 objectbench.height=80
-objectbench.width=352
-package.divider.horizontal=0.5993322203672788
-package.divider.vertical=0.8465608465608465
-package.editor.height=473
-package.editor.width=493
-package.editor.x=1446
-package.editor.y=445
-package.frame.height=625
-package.frame.width=619
+objectbench.width=480
+package.divider.horizontal=0.5997536945812808
+package.divider.vertical=0.8838451268357811
+package.editor.height=655
+package.editor.width=706
+package.editor.x=10
+package.editor.y=23
+package.frame.height=807
+package.frame.width=832
 package.numDependencies=2
 package.numTargets=3
 package.showExtends=true
@@ -33,20 +33,21 @@ target1.height=50
 target1.name=Calculator
 target1.showInterface=false
 target1.type=ClassTarget
-target1.width=90
-target1.x=200
-target1.y=310
+target1.width=140
+target1.x=80
+target1.y=200
 target2.height=50
-target2.name=Console
+target2.name=MathMethodsTest
 target2.showInterface=false
-target2.type=ClassTarget
-target2.width=80
-target2.x=80
-target2.y=200
+target2.type=UnitTestTargetJunit4
+target2.width=110
+target2.x=230
+target2.y=280
+target3.association=MathMethodsTest
 target3.height=50
-target3.name=MainApplication
+target3.name=MathMethods
 target3.showInterface=false
 target3.type=ClassTarget
-target3.width=120
-target3.x=70
-target3.y=70
+target3.width=110
+target3.x=200
+target3.y=310