Stworzono testy i klasę do mnożenia

MAVEN/Multiply/.idea/vcs.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
     <mapping directory="$PROJECT_DIR$" vcs="Git" />
   </component>
 </project>

MAVEN/Multiply/src/main/java/pl/dmcs/Multiply.java

@@ -0,0 +1,7 @@
+package pl.dmcs;
+
+public class Multiply {
+    public int multiply(int a, int b) {
+        return a * b;
+    }
+}

MAVEN/Multiply/src/test/java/pl/dmcs/MultiplyTest.java

@@ -0,0 +1,14 @@
+package pl.dmcs;
+
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class MultiplyTest {
+    @Test
+    public void testMultiply() {
+        Multiply multiply = new Multiply();
+        assertEquals(6, multiply.multiply(2, 3));
+        assertEquals(0, multiply.multiply(-1, 0));
+        assertEquals(6, multiply.multiply(-3, -2));
+    }
+}