Add test cases

sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/AttributeSetSuite.scala

@@ -0,0 +1,90 @@
+/*
+ * 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
+
+import java.sql.{Date, Timestamp}
+
+import scala.collection.immutable.HashSet
+
+import org.scalactic.TripleEqualsSupport.Spread
+import org.scalatest.FunSuite
+import org.scalatest.Matchers._
+
+import org.apache.spark.sql.catalyst.dsl.expressions._
+import org.apache.spark.sql.catalyst.analysis.UnresolvedGetField
+import org.apache.spark.sql.types._
+
+class AttributeSetSuite extends FunSuite {
+
+  val aUpper = AttributeReference("A", IntegerType)(exprId = ExprId(1))
+  val aLower = AttributeReference("a", IntegerType)(exprId = ExprId(1))
+  val fakeA = AttributeReference("a", IntegerType)(exprId = ExprId(3))
+  val aSet = AttributeSet(aLower :: Nil)
+
+  val bUpper = AttributeReference("B", IntegerType)(exprId = ExprId(2))
+  val bLower = AttributeReference("b", IntegerType)(exprId = ExprId(2))
+  val bSet = AttributeSet(bUpper :: Nil)
+
+  val aAndBSet = AttributeSet(aUpper :: bUpper :: Nil)
+
+  test("sanity check") {
+    assert(aUpper != aLower)
+    assert(bUpper != bLower)
+  }
+
+  test("checks by id not name") {
+    assert(aSet.contains(aUpper) === true)
+    assert(aSet.contains(aLower) === true)
+    assert(aSet.contains(fakeA) === false)
+
+    assert(aSet.contains(bUpper) === false)
+    assert(aSet.contains(bLower) === false)
+  }
+
+  test("++ preserves AttributeSet")  {
+    assert((aSet ++ bSet).contains(aUpper) === true)
+    assert((aSet ++ bSet).contains(aLower) === true)
+  }
+
+  test("extracts all references references") {
+    val addSet = AttributeSet(Add(aUpper, Alias(bUpper, "test")()):: Nil)
+    assert(addSet.contains(aUpper))
+    assert(addSet.contains(aLower))
+    assert(addSet.contains(bUpper))
+    assert(addSet.contains(bLower))
+  }
+
+  test("dedups attributes") {
+    assert(AttributeSet(aUpper :: aLower :: Nil).size === 1)
+  }
+
+  test("subset") {
+    assert(aSet.subsetOf(aAndBSet) === true)
+    assert(aAndBSet.subsetOf(aSet) === false)
+  }
+
+  test("equality") {
+    assert(aSet != aAndBSet)
+    assert(aAndBSet != aSet)
+    assert(aSet != bSet)
+    assert(bSet != aSet)
+
+    assert(aSet == aSet)
+    assert(aSet == AttributeSet(aUpper :: Nil))
+  }
+}