initial commit

.gitignore

+
+*.class
+
+# IntelliJ
+/.idea
+/out
+*.iml

test/de/hftstuttgart/ip2/CalculatorTest.java

+package de.hftstuttgart.ip2;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class CalculatorTest
+{
+    private Calculator calculator = new Calculator();
+
+    @Test
+    public void add() throws Exception {
+        assertEquals(5, calculator.add(2, 3), 0.1);
+    }
+
+    @Test
+    public void sub() throws Exception {
+        assertEquals(-1, calculator.sub(2, 3), 0.1);
+    }
+
+    @Test
+    public void mult() throws Exception {
+        assertEquals(15, calculator.mult(5, 3), 0.1);
+    }
+
+    @Test
+    public void div() throws Exception {
+        assertEquals(5, calculator.div(15, 3), 0.1);
+    }
+
+    @Test
+    public void sum() throws Exception {
+        assertEquals(12, calculator.sum(3, 4, 5), 0.1);
+    }
+
+}