[HUDI-2088] Missing Partition Fields And PreCombineField In Hoodie Properties For Table Written By Flink (#3171)

hudi-flink/src/test/java/org/apache/hudi/utils/TestStreamerUtil.java

@@ -0,0 +1,74 @@
+/*
+ * 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.hudi.utils;
+
+import org.apache.hudi.common.table.HoodieTableMetaClient;
+import org.apache.hudi.common.util.FileIOUtils;
+import org.apache.hudi.configuration.FlinkOptions;
+import org.apache.hudi.util.StreamerUtil;
+
+import org.apache.flink.configuration.Configuration;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+import java.io.File;
+import java.io.IOException;
+
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+
+public class TestStreamerUtil {
+
+  @TempDir
+  File tempFile;
+
+  @Test
+  public void testInitTableIfNotExists() throws IOException {
+    Configuration conf = TestConfigurations.getDefaultConf(tempFile.getAbsolutePath());
+
+    // Test for partitioned table.
+    conf.setString(FlinkOptions.PRECOMBINE_FIELD, "ts");
+    conf.setString(FlinkOptions.PARTITION_PATH_FIELD, "p0,p1");
+    StreamerUtil.initTableIfNotExists(conf);
+
+    // Validate the partition fields & preCombineField in hoodie.properties.
+    HoodieTableMetaClient metaClient1 = HoodieTableMetaClient.builder()
+            .setBasePath(tempFile.getAbsolutePath())
+            .setConf(new org.apache.hadoop.conf.Configuration())
+            .build();
+    assertTrue(metaClient1.getTableConfig().getPartitionColumns().isPresent(),
+            "Missing partition columns in the hoodie.properties.");
+    assertArrayEquals(metaClient1.getTableConfig().getPartitionColumns().get(), new String[] { "p0", "p1" });
+    assertEquals(metaClient1.getTableConfig().getPreCombineField(), "ts");
+
+    // Test for non-partitioned table.
+    conf.removeConfig(FlinkOptions.PARTITION_PATH_FIELD);
+    FileIOUtils.deleteDirectory(tempFile);
+    StreamerUtil.initTableIfNotExists(conf);
+    HoodieTableMetaClient metaClient2 = HoodieTableMetaClient.builder()
+            .setBasePath(tempFile.getAbsolutePath())
+            .setConf(new org.apache.hadoop.conf.Configuration())
+            .build();
+    assertFalse(metaClient2.getTableConfig().getPartitionColumns().isPresent());
+  }
+}
+