refactored the implementation of the NR handler and its test:

* the test now checks that if the extension is not loaded, an exception is thrown
* the test now mocks the new relic native functions
* moved some parameters as constants in the handler class

tests/Monolog/Handler/NewRelicHandlerTest.php

@@ -15,18 +15,49 @@ use Monolog\TestCase;
 use Monolog\Logger;
 
 class NewRelicHandlerTest extends TestCase
-{
-    public function testFallbackHandler()
+{    
+    /**
+     * @expectedException Monolog\Handler\MissingExtensionException
+     */
+    public function testThehandlerThrowsAnExceptionIfTheNRExtensionIsNotLoaded()
     {
-        $handler         = new NewRelicHandler();
-        $fallbackHandler = new TestHandler();
-        $record          = array(
-            'level' => Logger::DEBUG,
-            'extra' => array(),
-        );
-        
-        $handler->handle($record);
-        
-        $this->assertTrue($handler->isHandling($record));
+        $handler = new StubNewRelicHandlerWithoutExtension();
+        $handler->handle($this->getRecord());
+    }
+    
+    public function testThehandlerCanHandleTheRecord()
+    {
+        $handler = new StubNewRelicHandler();
+        $handler->handle($this->getRecord());
+    }
+    
+    public function testThehandlerCanAddParamsToTheNewRelicTrace()
+    {
+        $handler = new StubNewRelicHandler();
+        $handler->handle($this->getRecord(100, 'log message', array('a' => 'b')));
     }
 }
+
+class StubNewRelicHandlerWithoutExtension extends NewRelicHandler
+{
+    protected function isNewRelicEnabled()
+    {
+        return false;
+    }
+}
+
+class StubNewRelicHandler extends NewRelicHandler
+{
+    protected function isNewRelicEnabled()
+    {
+        return true;
+    }
+}
+
+function newrelic_notice_error() {
+    return true;
+}
+
+function newrelic_add_custom_parameter() {
+    return true;
+}