Test2 NONE

src/TriangleChecker.java

   // Analyse der Dreiecksart
   public static TriangleType checkTriangle(float a, float b, float c) {
 
-    if(a >= (b+c) || c >= (b+a) || b >= (a+c) ){
+    if(a >= (b+c) || c >= (b+a) || b >= (a+c) || a<=0 || b<=0 || c<=0){
 
       return TriangleType.NONE;
     }

test/TriangleCheckerTest.java

 
     }
 
+    @Test
+    public void testNoTriangle() {
+
+        // Arrange
+        float a = -1;
+        float b = 2;
+        float c = -1;
+
+        // Act
+        TriangleChecker.TriangleType type = TriangleChecker.checkTriangle(a, b, c);
+
+        // Assert
+        assertEquals(TriangleChecker.TriangleType.NONE, type);
+
+
+    }
+
 }