Solution 16.12.2021 15:02

src/TriangleChecker.java

@@ -47,9 +47,19 @@ public class TriangleChecker {
 
   // Analyse der Dreiecksart
   public static TriangleType checkTriangle(float a, float b, float c) {
-    if (a + b > c || b + c > a || a + c > b) {
+    if (a + b > c && b + c > a && a + c > b) {
+      if ( a == b && b == c) {
+        System.out.println("Gleichseitiges Dreieck");
+        return TriangleType.EQUILATERAL;
+      }
+      if ( a == b || b == c || a == c) {
+        System.out.println("Gleichschenkliges Dreieck");
+        return TriangleType.ISOSCELES;
+      }
+      System.out.println("Dreieck");
       return TriangleType.NORMAL;
     }
+    System.out.println("Kein Dreieck");
     return TriangleType.NONE;
   }
 

test/TriangleCheckerTest.java

@@ -17,6 +17,21 @@ public class TriangleCheckerTest {
         // Assert
         assertEquals(TriangleChecker.TriangleType.NORMAL, type);
 
+        a = 1; b = 1; c = 100;
+
+        TriangleChecker.TriangleType type2 = TriangleChecker.checkTriangle(a, b, c);
+        assertEquals(TriangleChecker.TriangleType.NONE, type2);
+
+        a = 3; b = 3; c = 2;
+
+        TriangleChecker.TriangleType type3 = TriangleChecker.checkTriangle(a, b, c);
+        assertEquals(TriangleChecker.TriangleType.ISOSCELES, type3);
+
+        a = 3; b = 3; c = 3;
+
+        TriangleChecker.TriangleType type4 = TriangleChecker.checkTriangle(a, b, c);
+        assertEquals(TriangleChecker.TriangleType.EQUILATERAL, type4);
+
     }
 
 }