[test] add test that triggers defragmentation after update

- add constructor to ExistXmldbEmbeddedServer that allows passing in configuration properties
- create new test that updates a document with fragmentation limit set to -1

exist-core/src/main/java/org/exist/test/ExistXmldbEmbeddedServer.java

@@ -42,6 +42,7 @@
 import java.io.IOException;
 import java.nio.file.Path;
 import java.util.Map;
+import java.util.Properties;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.fail;
@@ -98,6 +99,17 @@ public ExistXmldbEmbeddedServer(final boolean asGuest, final boolean disableAuto
         this.asGuest = asGuest;
     }
 
+    /**
+     * @param asGuest Use the guest account, default is the admin account
+     * @param disableAutoDeploy Whether auto-deployment of XARs should be disabled
+     * @param useTemporaryStorage Whether the data and journal folder should use temporary storage
+     * @param settings set properties
+     */
+    public ExistXmldbEmbeddedServer(final boolean asGuest, final boolean disableAutoDeploy, final boolean useTemporaryStorage, final Properties settings) {
+        this.existEmbeddedServer = new ExistEmbeddedServer(null, null, settings, disableAutoDeploy, useTemporaryStorage);
+        this.asGuest = asGuest;
+    }
+
     @Override
     protected void before() throws Throwable {
         startDb();

exist-core/src/test/java/org/exist/xquery/update/UpdateInsertTriggersDefrag.java

@@ -0,0 +1,57 @@
+package org.exist.xquery.update;
+
+import org.exist.test.ExistXmldbEmbeddedServer;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.ClassRule;
+import org.junit.Test;
+import org.xmldb.api.base.Collection;
+import org.xmldb.api.base.ResourceSet;
+import org.xmldb.api.modules.CollectionManagementService;
+import org.xmldb.api.modules.XMLResource;
+import org.xmldb.api.modules.XQueryService;
+
+import static org.exist.util.PropertiesBuilder.propertiesBuilder;
+import static org.exist.storage.DBBroker.PROPERTY_XUPDATE_FRAGMENTATION_FACTOR;
+import static org.exist.test.TestConstants.TEST_COLLECTION_URI;
+import static org.exist.test.TestConstants.TEST_XML_URI;
+import static org.junit.Assert.assertEquals;
+
+public class UpdateInsertTriggersDefrag {
+    @ClassRule
+    public static final ExistXmldbEmbeddedServer exist = new ExistXmldbEmbeddedServer(false, true, true,
+            propertiesBuilder().put(PROPERTY_XUPDATE_FRAGMENTATION_FACTOR, -1).build());
+    private final String path = TEST_COLLECTION_URI + "/" + TEST_XML_URI.toString();
+    private Collection testCollection;
+    private CollectionManagementService collectionService;
+
+    @Before
+    public void setUp() throws Exception {
+        collectionService = (CollectionManagementService) exist.getRoot().getService("CollectionManagementService","1.0");
+
+        testCollection = collectionService.createCollection(TEST_COLLECTION_URI.lastSegment().toString());
+        final XMLResource doc = (XMLResource) testCollection.createResource(TEST_XML_URI.toString(), XMLResource.RESOURCE_TYPE);
+
+        doc.setContent("<list><item>initial</item></list>");
+        testCollection.storeResource(doc);
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        collectionService.removeCollection(testCollection.getName());
+        testCollection.close();
+    }
+
+    @Test
+    public void triggerDefragAfterUpdate() throws Exception {
+        final XQueryService queryService = (XQueryService) testCollection.getService("XPathQueryService", "1.0");
+
+        final String update = "update insert <item>new node</item> into doc('" + path + "')//list";
+        final ResourceSet updateResult = queryService.queryResource(path, update);
+        assertEquals("Update expression returns an empty sequence", 0, updateResult.getSize());
+
+        final ResourceSet itemResult = queryService.queryResource(path, "//item");
+        assertEquals("Both items are returned", 2, itemResult.getSize());
+    }
+
+}