Implemented a Performance Counter class

test/zutil/log/CounterManagerTest.java

@@ -0,0 +1,148 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Ziver Koc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package zutil.log;
+
+import org.junit.Test;
+import zutil.log.CounterManager.Counter;
+
+import static org.junit.Assert.*;
+
+public class CounterManagerTest {
+
+    @Test
+    public void singletonTest(){
+        Counter c1 = CounterManager.getCounter("TestCounter");
+        Counter c2 = CounterManager.getCounter("TestCounter");
+        assertSame(c1, c2);
+
+        c1 = CounterManager.getCounter("TestCounter");
+        c2 = CounterManager.getCounter(CounterManagerTest.class, "TestCounter");
+        assertSame(c1, c2);
+
+        c1 = CounterManager.getCounter(CounterManagerTest.class, "TestCounter");
+        c2 = CounterManager.getCounter(CounterManagerTest.class, "TestCounter");
+        assertSame(c1, c2);
+    }
+
+    @Test
+    public void addTest(){
+        Counter c1 = CounterManager.getCounter("AddTestCounter");
+        assertEquals(0, c1.getValue());
+
+        c1.add(10);
+        assertEquals(10, c1.getValue());
+
+        c1.add(20);
+        c1.add(30);
+        assertEquals(60, c1.getValue());
+    }
+
+    @Test
+    public void setTest(){
+        Counter c1 = CounterManager.getCounter("SetTestCounter");
+        assertEquals(0, c1.getValue());
+
+        c1.set(10);
+        assertEquals(10, c1.getValue());
+
+        c1.set(20);
+        c1.set(30);
+        assertEquals(30, c1.getValue());
+    }
+
+    @Test
+    public void incrementTest(){
+        Counter c1 = CounterManager.getCounter("IncrementTestCounter");
+        assertEquals(0, c1.getValue());
+
+        c1.increment();
+        assertEquals(1, c1.getValue());
+
+        c1.increment();
+        c1.increment();
+        c1.increment();
+        assertEquals(4, c1.getValue());
+    }
+
+    @Test
+    public void decrementTest(){
+        Counter c1 = CounterManager.getCounter("DecrementTestCounter");
+        assertEquals(0, c1.getValue());
+
+        c1.decrement();
+        assertEquals(-1, c1.getValue());
+
+        c1.decrement();
+        c1.decrement();
+        c1.decrement();
+        assertEquals(-4, c1.getValue());
+    }
+
+    @Test
+    public void maxTest(){
+        Counter c1 = CounterManager.getCounter("MaxTestCounter");
+        assertEquals(0, c1.getMax());
+
+        c1.set(10);
+        assertEquals(10, c1.getMax());
+
+        c1.set(50);
+        assertEquals(50, c1.getMax());
+
+        c1.set(0);
+        assertEquals(50, c1.getMax());
+    }
+
+    @Test
+    public void minTest(){
+        Counter c1 = CounterManager.getCounter("MinTestCounter");
+        assertEquals(0, c1.getMin());
+
+        c1.set(10);
+        assertEquals(0, c1.getMin());
+
+        c1.set(-50);
+        assertEquals(-50, c1.getMin());
+
+        c1.set(0);
+        assertEquals(-50, c1.getMin());
+    }
+
+    @Test
+    public void averageTest(){
+        Counter c1 = CounterManager.getCounter("MinTestCounter");
+        assertEquals(0, (int)c1.getAverage());
+
+        c1.set(10);
+        assertEquals(10, (int)c1.getAverage());
+
+        c1.set(10);
+        assertEquals(10, (int)c1.getAverage());
+
+        c1.set(70);
+        assertEquals(30, (int)c1.getAverage());
+    }
+
+}