W-16656937: add unit test

carbonj.service/src/test/java/com/demandware/core/metric/TestUtil.java

@@ -0,0 +1,39 @@
+/**
+ * Copyright (c) 2018, salesforce.com, inc.
+ * All rights reserved.
+ * SPDX-License-Identifier: BSD-3-Clause
+ * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/BSD-3-Clause
+ */
+package com.demandware.core.metric;
+
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+public class TestUtil
+{
+    private static String falconPrefix = "cc-umon-client.falcon-fi";
+    private static String umDevPrefix = "um.dev.carbonj.";
+
+    @Test
+    public void testGetGraphiteMetricPrefix() throws UnknownHostException
+    {
+        String fqdn = InetAddress.getLocalHost().getHostName();
+        String hostname =  fqdn.substring(0, fqdn.indexOf( "." ) == -1 ? fqdn.length() : fqdn.indexOf( "." ) );
+
+        // Verify provided prefix with hostname
+        assertEquals(falconPrefix + "." + hostname, Util.getGraphiteMetricPrefix(falconPrefix, true, -1, "00", "v1"));
+
+        // Verify provided prefix without hostname
+        assertEquals(falconPrefix, Util.getGraphiteMetricPrefix(falconPrefix, false, -1, "00", "v1"));
+
+        // Verify prefix if podId is provided
+        assertEquals("pod100.00.carbonj." + hostname + ".v1", Util.getGraphiteMetricPrefix(null, false, 100, "00", "v1"));
+
+        // Verify prefix if podId and prefix aren't provided
+        assertEquals(umDevPrefix + hostname, Util.getGraphiteMetricPrefix(null, false, -1, "00", "v1"));
+    }
+}