Add junit coverage to drools-pdp

Change-Id: I253d3e85a08b893e7a9b168d92752205bcc459f6
Issue-ID: POLICY-1772
Signed-off-by: Jim Hahn <jrh3@att.com>

1 files changed, 32 insertions, 12 deletions

diff --git a/feature-simulators/src/main/java/org/onap/policy/drools/simulators/DMaaPSimulatorJaxRs.java b/feature-simulators/src/main/java/org/onap/policy/drools/simulators/DMaaPSimulatorJaxRs.java
index 5e7861d2..8b653aae 100644
--- a/feature-simulators/src/main/java/org/onap/policy/drools/simulators/DMaaPSimulatorJaxRs.java
+++ b/feature-simulators/src/main/java/org/onap/policy/drools/simulators/DMaaPSimulatorJaxRs.java
@@ -1,8 +1,8 @@
-/*
+/*-
  * ============LICENSE_START=======================================================
  * feature-simulators
  * ================================================================================
- * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2017-2019 AT&T Intellectual Property. All rights reserved.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -43,14 +43,16 @@ import org.slf4j.LoggerFactory;
 
 @Path("/events")
 public class DMaaPSimulatorJaxRs {
-    private static final String NO_DATA_MSG = "No Data";
+    public static final String NO_TOPIC_MSG = "No topic";
+    public static final String NO_DATA_MSG = "No Data";
+
     private static final Map<String, BlockingQueue<String>> queues = new ConcurrentHashMap<>();
     private static final Logger logger = LoggerFactory.getLogger(DMaaPSimulatorJaxRs.class);
     private static int responseCode = 200;
 
     /**
      * Get consumer ID.
-     * 
+     *
      * @param timeout timeout value
      * @param topicName the dmaap topic
      * @param httpResponse http response object
@@ -58,7 +60,7 @@ public class DMaaPSimulatorJaxRs {
      */
     @GET
     @Path("/{topicName}/{consumeGroup}/{consumerId}")
-    public String subscribe(@DefaultValue("0") @QueryParam("timeout") int timeout, @PathParam("topicName") 
+    public String subscribe(@DefaultValue("0") @QueryParam("timeout") int timeout, @PathParam("topicName")
             String topicName, @Context final HttpServletResponse httpResponse) {
         int currentRespCode = responseCode;
         httpResponse.setStatus(currentRespCode);
@@ -79,14 +81,14 @@ public class DMaaPSimulatorJaxRs {
         else if (timeout > 0) {
             return waitForNextMessageFromQueue(timeout, topicName);
         }
-        return "No topic";
+        return NO_TOPIC_MSG;
     }
 
     private String getNextMessageFromQueue(final int timeout, final String topicName) {
         BlockingQueue<String> queue = queues.get(topicName);
         String response = NO_DATA_MSG;
         try {
-            response = queue.poll(timeout, TimeUnit.MILLISECONDS);
+            response = poll(queue, timeout);
         } catch (InterruptedException e) {
             logger.debug("error in DMaaP simulator", e);
             Thread.currentThread().interrupt();
@@ -99,7 +101,7 @@ public class DMaaPSimulatorJaxRs {
 
     private String waitForNextMessageFromQueue(int timeout, String topicName) {
         try {
-            Thread.sleep(timeout);
+            sleep(timeout);
             if (queues.containsKey(topicName)) {
                 BlockingQueue<String> queue = queues.get(topicName);
                 String response = queue.poll();
@@ -112,12 +114,12 @@ public class DMaaPSimulatorJaxRs {
             logger.debug("error in DMaaP simulator", e);
             Thread.currentThread().interrupt();
         }
-        return "No topic";
+        return NO_TOPIC_MSG;
     }
 
     /**
      * Post to a topic.
-     * 
+     *
      * @param topicName name of the topic
      * @param body message
      * @return empty string
@@ -142,12 +144,30 @@ public class DMaaPSimulatorJaxRs {
         return "Status code set";
     }
 
+    // the following non-static methods may be overridden by junit tests
+
+    protected String poll(BlockingQueue<String> queue, final int timeout) throws InterruptedException {
+        return queue.poll(timeout, TimeUnit.MILLISECONDS);
+    }
+
+    protected void sleep(int timeout) throws InterruptedException {
+        Thread.sleep(timeout);
+    }
+
     /**
      * Static method to set static response code, synchronized for multiple possible uses.
-     * 
+     *
      * @param incomingResponseCode the response code to set
      */
     private static synchronized void setResponseCode(final int incomingResponseCode) {
-        responseCode = incomingResponseCode; 
+        responseCode = incomingResponseCode;
+    }
+
+    /**
+     * Used only by junit tests to reset the simulator.
+     */
+    protected static void reset() {
+        responseCode = 200;
+        queues.clear();
     }
 }