runWith (#2691)

testing/src/test/java/com/baeldung/junit/SubstractionTest.java

@@ -0,0 +1,14 @@
+package com.baeldung.junit;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class SubstractionTest {
+    Calculator calculator = new Calculator();
+
+    @Test
+    public void substraction() {
+        assertEquals("substraction", 2, calculator.sub(5, 3));
+    }
+}