Add synapse unit testing framework

Author: sajithaliyanage

modules/core/pom.xml

@@ -318,5 +318,9 @@
             <artifactId>xercesImpl</artifactId>
 	        <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>com.google.code.gson</groupId>
+            <artifactId>gson</artifactId>
+        </dependency>
     </dependencies>
 </project>

modules/core/src/main/java/org/apache/synapse/ServerContextInformation.java

@@ -42,6 +42,8 @@ public class ServerContextInformation {
     private ServerState serverState = ServerState.UNDETERMINED;
     /** Reference to the server configuration */
     private ServerConfigurationInformation serverConfigurationInformation;
+    /** whether unit test mode is enabled or not */
+    private boolean isUnitTestModeEnabled=false;
 
     public ServerContextInformation(ServerConfigurationInformation serverConfigurationInformation) {
         this.serverConfigurationInformation = serverConfigurationInformation;
@@ -96,4 +98,12 @@ public void setSynapseEnvironment(SynapseEnvironment synapseEnvironment) {
     public ServerConfigurationInformation getServerConfigurationInformation() {
         return serverConfigurationInformation;
     }
+
+    public boolean isServerUnitTestModeEnabled(){
+        return isUnitTestModeEnabled;
+    }
+
+    public void setServerUnitTestModeEnabled(boolean isUnitTestModeEnabled){
+        this.isUnitTestModeEnabled=isUnitTestModeEnabled;
+    }
 }

modules/core/src/main/java/org/apache/synapse/core/axis2/Axis2SynapseEnvironment.java

@@ -44,6 +44,7 @@
 import org.apache.synapse.rest.RESTRequestHandler;
 import org.apache.synapse.task.SynapseTaskManager;
 import org.apache.synapse.transport.passthru.util.RelayUtils;
+import org.apache.synapse.unittest.UnitTestingExecutor;
 import org.apache.synapse.util.concurrent.SynapseThreadPool;
 import org.apache.synapse.util.xpath.ext.SynapseXpathFunctionContextProvider;
 import org.apache.synapse.util.xpath.ext.SynapseXpathVariableResolver;
@@ -81,6 +82,9 @@ public class Axis2SynapseEnvironment implements SynapseEnvironment {
     Map<QName, SynapseXpathVariableResolver> xpathVariableExtensions =
             new HashMap<QName, SynapseXpathVariableResolver>();
 
+    /** Unit test mode is enabled/disabled*/
+    private boolean isUnitTestEnabled = false;
+
     public Axis2SynapseEnvironment(SynapseConfiguration synCfg) {
 
         int coreThreads = SynapseThreadPool.SYNAPSE_CORE_THREADS;
@@ -124,7 +128,25 @@ public Axis2SynapseEnvironment(ConfigurationContext cfgCtx,
     public Axis2SynapseEnvironment(ConfigurationContext cfgCtx,
         SynapseConfiguration synapseConfig, ServerContextInformation contextInformation) {
         this(cfgCtx, synapseConfig);
-        this.contextInformation = contextInformation;        
+        this.contextInformation = contextInformation;
+        setSeverUnitTestMode(contextInformation);
+    }
+
+    /**
+     * This method is to set the unit test mode is enabled.
+     * unit test message context and environment initializes
+     */
+    private void setSeverUnitTestMode(ServerContextInformation contextInformation) {
+        if (Boolean.parseBoolean(System.getProperty("synapseTest"))) {
+            setUnitTestEnabled(true);
+            contextInformation.setServerUnitTestModeEnabled(true);
+            log.info("Synapse unit testing server enabled");
+
+            //starting UnitTestingExecutor
+            UnitTestingExecutor testExecutor = UnitTestingExecutor.getExecuteInstance();
+            testExecutor.setSynapseConfiguration(this.synapseConfig);
+            testExecutor.start();
+        }
     }
 
     public boolean injectMessage(final MessageContext synCtx) {
@@ -545,4 +567,22 @@ private Mediator getProxyOutSequence(MessageContext synCtx, ProxyService proxySe
         }
         return null;
     }
+
+    /**
+     * Whether unit test is enabled in the environment.
+     *
+     * @return whether debugging is enabled in the environment
+     */
+    public boolean isUnitTestEnabled() {
+        return isUnitTestEnabled;
+    }
+
+    /**
+     * set unit test mode enabled in the environment.
+     *
+     * @param isUnitTestEnabled boolean value of unit test mode
+     */
+    public void setUnitTestEnabled(boolean isUnitTestEnabled) {
+        this.isUnitTestEnabled = isUnitTestEnabled;
+    }
 }