SLING-4075 - Improve test coverage of SCD

* Add DistributionJcrUtils unit test coverage
diff --git a/src/test/java/org/apache/sling/distribution/util/DistributionJcrUtilsTest.java b/src/test/java/org/apache/sling/distribution/util/DistributionJcrUtilsTest.java
new file mode 100644
index 0000000..a202d56
--- /dev/null
+++ b/src/test/java/org/apache/sling/distribution/util/DistributionJcrUtilsTest.java
@@ -0,0 +1,60 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.distribution.util;
+
+import org.apache.jackrabbit.api.observation.JackrabbitEvent;
+import org.junit.Test;
+import org.mockito.Mockito;
+
+import javax.jcr.RepositoryException;
+import javax.jcr.observation.Event;
+
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.assertFalse;
+import static org.mockito.Mockito.when;
+
+public class DistributionJcrUtilsTest {
+
+    @Test
+    public void testIsSafeNonJackrabbitEvent() throws Exception {
+        Event event = Mockito.mock(Event.class);
+        assertFalse(DistributionJcrUtils.isSafe(event));
+    }
+
+    @Test
+    public void testIsSafeNonJackrabbitExternalEvent() throws Exception {
+        assertFalse(DistributionJcrUtils.isSafe(buildEvent(true, null)));
+        assertFalse(DistributionJcrUtils.isSafe(buildEvent(true, "user-data")));
+    }
+
+    @Test
+    public void testIsSafeNonJackrabbitNonExternalEvent() throws Exception {
+        assertTrue(DistributionJcrUtils.isSafe(buildEvent(false, null)));
+        assertTrue(DistributionJcrUtils.isSafe(buildEvent(false, "user-data")));
+        assertFalse(DistributionJcrUtils.isSafe(buildEvent(false, "do.not.distribute")));
+    }
+
+    private JackrabbitEvent buildEvent(boolean external, String userData)
+            throws RepositoryException {
+        JackrabbitEvent event = Mockito.mock(JackrabbitEvent.class);
+        when(event.isExternal()).thenReturn(external);
+        when(event.getUserData()).thenReturn(userData);
+        return event;
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/org/apache/sling/distribution/util/RequestUtilsTest.java b/src/test/java/org/apache/sling/distribution/util/RequestUtilsTest.java
index 7b42b5d..9199135 100644
--- a/src/test/java/org/apache/sling/distribution/util/RequestUtilsTest.java
+++ b/src/test/java/org/apache/sling/distribution/util/RequestUtilsTest.java
@@ -24,7 +24,6 @@
 import org.apache.sling.distribution.DistributionRequestType;
 import org.junit.Test;
 
-import static org.apache.sling.distribution.util.RequestUtils.fromServletRequest;
 import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
 import static org.mockito.Mockito.mock;
@@ -40,14 +39,14 @@
 
     @Test
     public void testFromServletRequest() throws Exception {
-        DistributionRequest dr = fromServletRequest(buildServletRequest(REQ_TYPE.toString(), P_PATHS, "true"));
+        DistributionRequest dr = RequestUtils.fromServletRequest(buildServletRequest(REQ_TYPE.toString(), P_PATHS, "true"));
         assertEquals(REQ_TYPE, dr.getRequestType());
         assertArrayEquals(P_PATHS, dr.getPaths());
     }
 
     @Test
     public void testFromServletRequestEmptyPath() throws Exception {
-        DistributionRequest dr = fromServletRequest(buildServletRequest(REQ_TYPE.toString(), null, "true"));
+        DistributionRequest dr = RequestUtils.fromServletRequest(buildServletRequest(REQ_TYPE.toString(), null, "true"));
         assertEquals(REQ_TYPE, dr.getRequestType());
         assertArrayEquals(EMPTY_PATHS, dr.getPaths());
     }