added check for normal triangle

test/Praktikum02/TriangleCheckerTest.java

@@ -0,0 +1,18 @@
+package Praktikum02;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class TriangleCheckerTest {
+
+    @Test
+    void checkTriangleNormal() {
+        assertEquals(TriangleChecker.TriangleType.NORMAL,TriangleChecker.checkTriangle(5,2.6f, 3));
+
+    }
+    @Test
+    void checkTriangleNone(){
+        assertEquals(TriangleChecker.TriangleType.NONE,TriangleChecker.checkTriangle(6,2.9f, 2));
+    }
+}