For Example I have this method:
Number.java

```
public static int add(int nr1, int nr2) {
        return nr2 + nr2;
    }

```

As you see I return number2 + number2

In my Test I use that it would throw the error that it was expected 9 instead of the number which was calculate in the main method.

```
 @Test
        public void test() throws Exception {
            int nr1 = 4;
            int nr2 = 5;
            int sum = Number.add(nr1, nr2);
            assertEquals(9, summe);
       }

```

I tried this to get an message if the program fails but it doesn´t work as I thought:

```
 @Test
        public void test() throws Exception {
            int nr1 = 4;
            int nr2 = 5;
            int sum = Number.add(nr1, nr2);
            assertEquals(9, sum);
            try {
                assertEquals(9, sum);
            }catch(AssertionError e) {
                String message = e.getMessage();
                message = "Did you calculate the right numbers together?";
            }
       }

```