Timer und Counter Hilfsklassen

src/test/java/schule/ngb/zm/util/CounterTest.java

@@ -0,0 +1,98 @@
+package schule.ngb.zm.util;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class CounterTest {
+
+	@Test
+	void counter() {
+		Counter cnt = new Counter();
+		assertEquals(0, cnt.getCount());
+		assertEquals(Double.NaN, cnt.getMax());
+		assertEquals(Double.NaN, cnt.getMin());
+		assertEquals(Double.NaN, cnt.getSum());
+	}
+
+	@Test
+	void getCount() {
+		Counter cnt = new Counter();
+		assertEquals(0, cnt.getCount());
+		cnt.inc();
+		assertEquals(1, cnt.getCount());
+		cnt.inc(); cnt.inc();
+		assertEquals(3, cnt.getCount());
+		cnt.setCount(33);
+		assertEquals(33, cnt.getCount());
+	}
+
+	@Test
+	void getMax() {
+		Counter cnt = new Counter();
+		assertEquals(Double.NaN, cnt.getMax());
+		cnt.count(2);
+		assertEquals(2, cnt.getMax());
+		cnt.count(8);
+		assertEquals(8, cnt.getMax());
+		cnt.count(4);
+		assertEquals(8, cnt.getMax());
+	}
+
+	@Test
+	void getMin() {
+		Counter cnt = new Counter();
+		assertEquals(Double.NaN, cnt.getMin());
+		cnt.count(2);
+		assertEquals(2, cnt.getMin(), "min(2)");
+		cnt.count(8);
+		assertEquals(2, cnt.getMin(), "min(2,8)");
+		cnt.count(1);
+		assertEquals(1, cnt.getMin(), "min(2,8,1)");
+	}
+
+	@Test
+	void getSum() {
+		Counter cnt = new Counter();
+		assertEquals(Double.NaN, cnt.getSum());
+		cnt.count(2);
+		assertEquals(2, cnt.getSum());
+		cnt.count(8);
+		assertEquals(10, cnt.getSum());
+		cnt.count(-1);
+		assertEquals(9, cnt.getSum());
+	}
+
+	@Test
+	void reset() {
+		Counter cnt = new Counter();
+		cnt.inc();
+		cnt.count(2);
+		assertEquals(2, cnt.getCount());
+		assertEquals(2, cnt.getSum());
+		cnt.reset();
+		assertEquals(0, cnt.getCount());
+		assertEquals(Double.NaN, cnt.getSum());
+	}
+
+	@Test
+	void inc() {
+		Counter cnt = new Counter();
+		assertEquals(0, cnt.getCount());
+		cnt.inc();
+		assertEquals(1, cnt.getCount());
+		cnt.inc().inc();
+		assertEquals(3, cnt.getCount());
+	}
+
+	@Test
+	void dec() {
+		Counter cnt = new Counter();
+		assertEquals(0, cnt.getCount());
+		cnt.dec();
+		assertEquals(-1, cnt.getCount());
+		cnt.dec().dec();
+		assertEquals(-3, cnt.getCount());
+	}
+
+}