maven compiles all tests independetly of which tests are run

src/test/java/oving1/UpOrDownCounterTest.java.unimplemented

@@ -0,0 +1,57 @@
+package oving1;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+
+public class UpOrDownCounterTest {
+
+	@Test
+	@DisplayName("Count up")
+	public void testCountUp() {
+		UpOrDownCounter counter = new UpOrDownCounter(1, 5);
+		assertEquals(1, counter.getCounter(),
+				"Counter value should be equal to starting value when created");
+
+		for (int i = 2; i < 5; i++) {
+			boolean result = counter.count();
+			assertEquals(i, counter.getCounter(), "Wrong counter value");
+			assertTrue(result, "#count() should return true while within legal values");
+		}
+
+		boolean result = counter.count();
+		assertEquals(5, counter.getCounter(), "Wrong counter value");
+		assertFalse(result, "#count() should return false when we cannot count further");
+
+		result = counter.count();
+		assertEquals(5, counter.getCounter(),
+				"Counter value should not change when counting beyond legal values");
+		assertFalse(result, "#count() should return false when we cannot count further");
+	}
+
+	@Test
+	@DisplayName("Count down")
+	public void testCountDown() {
+		UpOrDownCounter counter = new UpOrDownCounter(1, -5);
+		assertEquals(1, counter.getCounter(),
+				"Counter value should be equal to starting value when created");
+
+		for (int i = 0; i > -5; i--) {
+			boolean result = counter.count();
+			assertEquals(i, counter.getCounter(), "Wrong counter value");
+			assertTrue(result, "#count() should return true while within legal values");
+		}
+
+		boolean result = counter.count();
+		assertEquals(-5, counter.getCounter(), "Wrong counter value");
+		assertFalse(result, "#count() should return false when we cannot count further");
+
+		result = counter.count();
+		assertEquals(-5, counter.getCounter(),
+				"Counter value should not change when counting beyond legal values");
+		assertFalse(result, "#count() should return false when we cannot count further");
+	}
+}