@Test public void getClassificationIsoscelesTest() {


   Triangle t = new Triangle(7, 10, 7);
   Assert.assertEquals("getClassification isosceles test", 
                        "isosceles", t.getClassification());

   t = new Triangle(7, 7, 9);
   Assert.assertEquals("getClassification isosceles test", 
                        "isosceles", t.getClassification());
   t = new Triangle(9, 7, 7);
   Assert.assertEquals("getClassification isosceles test", 
                        "isosceles", t.getClassification());


}