1 files changed, 52 insertions, 0 deletions
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/local/UnionNodeSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/local/UnionNodeSuite.scala
new file mode 100644
index 0000000000..34670287c3
--- /dev/null
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/local/UnionNodeSuite.scala
@@ -0,0 +1,52 @@
+/*
+* 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.spark.sql.execution.local
+
+import org.apache.spark.sql.test.SharedSQLContext
+
+class UnionNodeSuite extends LocalNodeTest with SharedSQLContext {
+
+  test("basic") {
+    checkAnswer2(
+      testData,
+      testData,
+      (node1, node2) => UnionNode(Seq(node1, node2)),
+      testData.unionAll(testData).collect()
+    )
+  }
+
+  test("empty") {
+    checkAnswer2(
+      emptyTestData,
+      emptyTestData,
+      (node1, node2) => UnionNode(Seq(node1, node2)),
+      emptyTestData.unionAll(emptyTestData).collect()
+    )
+  }
+
+  test("complicated union") {
+    val dfs = Seq(testData, emptyTestData, emptyTestData, testData, testData, emptyTestData,
+      emptyTestData, emptyTestData, testData, emptyTestData)
+    doCheckAnswer(
+      dfs,
+      nodes => UnionNode(nodes),
+      dfs.reduce(_.unionAll(_)).collect()
+    )
+  }
+
+}