zstan commented on code in PR #2537:
URL: https://github.com/apache/ignite-3/pull/2537#discussion_r1832224483


##########
modules/runner/src/integrationTest/java/org/apache/ignite/internal/runner/app/client/ItThinClientObservationTsTest.java:
##########
@@ -0,0 +1,65 @@
+/*
+ * 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.ignite.internal.runner.app.client;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.apache.ignite.table.Table;
+import org.apache.ignite.table.Tuple;
+import org.apache.ignite.tx.Transaction;
+import org.apache.ignite.tx.TransactionOptions;
+import org.junit.jupiter.api.Test;
+
+/**
+ * This test is checking correctness of observation timestamp calculation.
+ */
+public class ItThinClientObservationTsTest extends ItAbstractThinClientTest {
+
+    @Test
+    public void test() {
+        Table srvTable = server().tables().table(TABLE_NAME);
+        Table clientTable = client().tables().table(TABLE_NAME);
+
+        log.info("Tables [client={}, srv={}]", 
clientTable.getClass().getSimpleName(), srvTable.getClass().getSimpleName());
+
+        srvTable.keyValueView().put(null, Tuple.create().set(COLUMN_KEY, 42), 
Tuple.create().set(COLUMN_VAL, "srv value"));
+
+        clientTable.keyValueView().put(null, Tuple.create().set(COLUMN_KEY, 
42), Tuple.create().set(COLUMN_VAL, "client value"));
+
+        Transaction tx =  client().transactions().begin(new 
TransactionOptions().readOnly(true));
+
+        String clientValue = clientTable.keyValueView().get(tx,  
Tuple.create().set(COLUMN_KEY, 42)).value(COLUMN_VAL);
+
+        tx.commit();
+
+        Transaction srvTx =  server().transactions().begin(new 
TransactionOptions().readOnly(true));

Review Comment:
   plz configure _idleSafeTimePropagationDuration_ before this and the same 
tests, for avoid potential flaky on jvm freeze



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