Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/13964#discussion_r68887674
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/xml/XPathExpressionSuite.scala
---
@@ -0,0 +1,68 @@
+/*
+ * 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.catalyst.expressions.xml
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.sql.catalyst.expressions.{ExpressionEvalHelper,
Literal, NonFoldableLiteral}
+import org.apache.spark.sql.types.StringType
+import org.apache.spark.unsafe.types.UTF8String
+
+/**
+ * Test suite for various xpath functions.
+ */
+class XPathExpressionSuite extends SparkFunSuite with ExpressionEvalHelper
{
+
+ private def testBoolean[T](xml: String, path: String, expected: T): Unit
= {
+ checkEvaluation(
+ XPathBoolean(Literal.create(xml, StringType), Literal.create(path,
StringType)),
+ expected)
+ }
+
+ test("xpath_boolean") {
+ testBoolean("<a><b>b</b></a>", "a/b", true)
+ testBoolean("<a><b>b</b></a>", "a/c", false)
+ testBoolean("<a><b>b</b></a>", "a/b = \"b\"", true)
+ testBoolean("<a><b>b</b></a>", "a/b = \"c\"", false)
+ testBoolean("<a><b>10</b></a>", "a/b < 10", false)
+ testBoolean("<a><b>10</b></a>", "a/b = 10", true)
+
+ // null input
+ testBoolean(null, null, null)
+ testBoolean(null, "a", null)
+ testBoolean("<a><b>10</b></a>", null, null)
+
+ // exception handling for invalid input
+ intercept[Exception] {
+ testBoolean("<a>/a>", "a", null)
+ }
+ }
+
+ test("xpath_boolean path cache invalidation") {
--- End diff --
do we still need to test it? there is no cache anymore
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