test(flink): add GlutenRowtimeInserterHelper unit tests

Author: ggjh-159

gluten-flink/ut/src/test/java/org/apache/gluten/velox/GlutenRowtimeInserterHelperTest.java

@@ -0,0 +1,117 @@
+/*
+ * 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.gluten.velox;
+
+import org.apache.gluten.table.runtime.operators.GlutenOneInputOperator;
+
+import org.apache.flink.api.common.functions.MapFunction;
+import org.apache.flink.api.dag.Transformation;
+import org.apache.flink.streaming.api.operators.SimpleOperatorFactory;
+import org.apache.flink.streaming.api.operators.StreamMap;
+import org.apache.flink.streaming.api.transformations.OneInputTransformation;
+import org.apache.flink.table.data.RowData;
+import org.apache.flink.table.runtime.operators.sink.StreamRecordTimestampInserter;
+import org.apache.flink.table.runtime.typeutils.InternalTypeInfo;
+import org.apache.flink.table.types.logical.BigIntType;
+import org.apache.flink.table.types.logical.RowType;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Collections;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertNotSame;
+import static org.junit.jupiter.api.Assertions.assertSame;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class GlutenRowtimeInserterHelperTest {
+
+  private static final RowType UPSTREAM_ROW_TYPE = RowType.of(new BigIntType());
+
+  private static Transformation<RowData> newUpstream() {
+    return new StubTransformation("upstream", InternalTypeInfo.of(UPSTREAM_ROW_TYPE));
+  }
+
+  private static OneInputTransformation<RowData, RowData> newNativeInserterTx(
+      Transformation<RowData> upstream, int rowtimeIndex) {
+    StreamRecordTimestampInserter op = new StreamRecordTimestampInserter(rowtimeIndex);
+    return new OneInputTransformation<>(
+        upstream, "native-inserter", op, upstream.getOutputType(), 1);
+  }
+
+  private static OneInputTransformation<RowData, RowData> newOtherOperatorTx(
+      Transformation<RowData> upstream) {
+    StreamMap<RowData, RowData> other = new StreamMap<>(new IdentityMapFunction());
+    return new OneInputTransformation<>(upstream, "other-op", other, upstream.getOutputType(), 1);
+  }
+
+  @Test
+  void testNoOpForNonOneInputTransformation() {
+    Transformation<RowData> stub =
+        new StubTransformation("stub", InternalTypeInfo.of(UPSTREAM_ROW_TYPE));
+    assertSame(stub, GlutenRowtimeInserterHelper.processTransformation(stub));
+  }
+
+  @Test
+  void testNoOpForNonInserterOperator() {
+    Transformation<RowData> upstream = newUpstream();
+    OneInputTransformation<RowData, RowData> tx = newOtherOperatorTx(upstream);
+    assertSame(tx, GlutenRowtimeInserterHelper.processTransformation(tx));
+  }
+
+  @Test
+  void testReplacesNativeInserter() {
+    Transformation<RowData> upstream = newUpstream();
+    OneInputTransformation<RowData, RowData> nativeTx = newNativeInserterTx(upstream, 0);
+
+    Transformation<RowData> result = GlutenRowtimeInserterHelper.processTransformation(nativeTx);
+
+    assertNotSame(nativeTx, result);
+    assertTrue(result instanceof OneInputTransformation);
+    @SuppressWarnings("unchecked")
+    OneInputTransformation<RowData, RowData> out =
+        (OneInputTransformation<RowData, RowData>) result;
+    assertTrue(out.getOperatorFactory() instanceof SimpleOperatorFactory);
+    Object op = ((SimpleOperatorFactory<?>) out.getOperatorFactory()).getOperator();
+    assertTrue(op instanceof GlutenOneInputOperator);
+    assertSame(upstream, out.getInputs().get(0));
+    assertSame(1, out.getParallelism());
+  }
+
+  private static final class StubTransformation extends Transformation<RowData> {
+    StubTransformation(String name, InternalTypeInfo<RowData> typeInfo) {
+      super(name, typeInfo, 1);
+    }
+
+    @Override
+    public List<Transformation<?>> getInputs() {
+      return Collections.emptyList();
+    }
+
+    @Override
+    protected List<Transformation<?>> getTransitivePredecessorsInternal() {
+      return Collections.emptyList();
+    }
+  }
+
+  private static final class IdentityMapFunction implements MapFunction<RowData, RowData> {
+    @Override
+    public RowData map(RowData value) {
+      return value;
+    }
+  }
+}