Triangle Checker

src/TriangleChecker.java

@@ -47,8 +47,25 @@ public class TriangleChecker {
 
   // Analyse der Dreiecksart
   public static TriangleType checkTriangle(float a, float b, float c) {
+    if (a <= 0 || b <= 0 || c <= 0)
       return TriangleType.NONE;
+
+    if (a + b > c && b + c > a && a + c > b) {
+      if (a == b && b == c) {
+        return TriangleType.EQUILATERAL;
+      }
+      if (a == b || a == c || b == c) {
+        return TriangleType.ISOSCELES;
+      }
+
+      return TriangleType.NORMAL;
+    }
+
+    return TriangleType.NONE;
+
+  }
+
 }
 
 
-}
+

test/TriangleCheckerTest.java

@@ -19,4 +19,71 @@ public class TriangleCheckerTest {
 
     }
 
+    @Test
+    public void testUnvalidTriangle() {
+
+        // Arrange
+        float a = 1;
+        float b = 1;
+        float c = 100;
+
+        // Act
+        TriangleChecker.TriangleType type = TriangleChecker.checkTriangle(a, b, c);
+
+        // Assert
+        assertEquals(TriangleChecker.TriangleType.NONE, type);
+
+    }
+
+    @Test
+    public void testNegativeTriangle() {
+
+        // Arrange
+        float a = -2;
+        float b = 2;
+        float c = 3;
+
+        // Act
+        TriangleChecker.TriangleType type = TriangleChecker.checkTriangle(a, b, c);
+
+        // Assert
+        assertEquals(TriangleChecker.TriangleType.NONE, type);
+
+    }
+
+    @Test
+    public void testEquilateralTriangle() {
+
+        // Arrange
+        float a = 2;
+        float b = 2;
+        float c = 2;
+
+        // Act
+        TriangleChecker.TriangleType type = TriangleChecker.checkTriangle(a, b, c);
+
+        // Assert
+        assertEquals(TriangleChecker.TriangleType.EQUILATERAL, type);
+
+    }
+
+    @Test
+    public void testIsoscelesTriangle() {
+
+        // Arrange
+        float a = 3;
+        float b = 3;
+        float c = 4;
+
+        // Act
+        TriangleChecker.TriangleType type = TriangleChecker.checkTriangle(a, b, c);
+
+        // Assert
+        assertEquals(TriangleChecker.TriangleType.ISOSCELES, type);
+
+    }
+
+
+
+
 }