Index: oak-segment-tar/src/test/java/org/apache/jackrabbit/oak/segment/LoggingHookTest.java
===================================================================
--- oak-segment-tar/src/test/java/org/apache/jackrabbit/oak/segment/LoggingHookTest.java	(nonexistent)
+++ oak-segment-tar/src/test/java/org/apache/jackrabbit/oak/segment/LoggingHookTest.java	(working copy)
@@ -0,0 +1,104 @@
+/*
+ * 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.jackrabbit.oak.segment;
+
+import static org.apache.jackrabbit.oak.segment.file.FileStoreBuilder.fileStoreBuilder;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.io.File;
+import java.io.IOException;
+import java.time.Instant;
+import java.util.Date;
+import java.util.function.Consumer;
+import java.util.regex.Pattern;
+
+import org.apache.jackrabbit.oak.api.CommitFailedException;
+import org.apache.jackrabbit.oak.api.Type;
+import org.apache.jackrabbit.oak.segment.file.FileStore;
+import org.apache.jackrabbit.oak.segment.file.InvalidFileStoreVersionException;
+import org.apache.jackrabbit.oak.segment.test.TemporaryFileStore;
+import org.apache.jackrabbit.oak.spi.commit.CommitInfo;
+import org.apache.jackrabbit.oak.spi.commit.EmptyHook;
+import org.apache.jackrabbit.oak.spi.state.NodeBuilder;
+import org.apache.jackrabbit.oak.spi.state.NodeState;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.RuleChain;
+import org.junit.rules.TemporaryFolder;
+
+public class LoggingHookTest {
+
+    private TemporaryFolder folder = new TemporaryFolder(new File("target"));
+
+    private TemporaryFileStore fileStore = new TemporaryFileStore(folder, false);
+
+    @Rule
+    public RuleChain chain = RuleChain.outerRule(folder)
+        .around(fileStore);
+
+    @Test
+    public void testLoggingHook() throws InvalidFileStoreVersionException, IOException, CommitFailedException {
+        final String nodePattern = "n([!]|[+-^] [^ ]+)$";
+        final String propPattern = "p[+-] [^ ]+ <[A-Z]+> = [^ ]*$";
+        final Pattern expected = Pattern.compile("^[0-9]+ [^ ]+ (" + nodePattern + "|" + propPattern + ")");
+        final Consumer<String> check = s -> assertTrue("Checking " + s, expected.matcher(s).matches());
+
+        try (FileStore fileStore = fileStoreBuilder(folder.getRoot()).build()) {
+            final SegmentNodeStore ns = SegmentNodeStoreBuilders.builder(fileStore).withLoggingHook(check).build();
+            final NodeState currentHead = ns.getRoot();
+            NodeBuilder root = currentHead.builder();
+            root.setChildNode("1a");
+            root.setChildNode("1b").setProperty("p1", "p1val");
+            NodeBuilder builder = root.setChildNode("1c");
+
+            builder.setChildNode("2d");
+            builder.setChildNode("2e").setProperty("p2", 42);
+            builder = builder.setChildNode("2f");
+
+            builder.setChildNode("3g");
+            builder.setChildNode("3h").setProperty("p3", Date.from(Instant.now()).toString(), Type.DATE);
+            builder.setChildNode("3i").setChildNode("4j");
+            ns.merge(root, EmptyHook.INSTANCE, CommitInfo.EMPTY);
+        }
+    }
+
+    @Test
+    public void testChildNode() throws Exception {
+        String result =
+            "n+ child\n" +
+                "n!\n";
+        assertCommitProduces(result, root -> root.setChildNode("child"));
+    }
+
+    private void assertCommitProduces(String expected, Consumer<NodeBuilder> committer) throws Exception {
+        StringBuilder result = new StringBuilder();
+
+        SegmentNodeStore store = SegmentNodeStoreBuilders.builder(fileStore.fileStore())
+            .withLoggingHook(s -> result.append(s).append("\n"))
+            .build();
+
+        NodeBuilder root = store.getRoot().builder();
+        committer.accept(root);
+        store.merge(root, EmptyHook.INSTANCE, CommitInfo.EMPTY);
+
+        assertEquals(expected, result.toString());
+    }
+
+}

Property changes on: oak-segment-tar/src/test/java/org/apache/jackrabbit/oak/segment/LoggingHookTest.java
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Added: svn:eol-style
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+native
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