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/*
* 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.streaming
import org.apache.spark.sql.{Row, StreamTest}
import org.apache.spark.sql.execution.streaming._
import org.apache.spark.sql.test.SharedSQLContext
class StreamSuite extends StreamTest with SharedSQLContext {
import testImplicits._
test("map with recovery") {
val inputData = MemoryStream[Int]
val mapped = inputData.toDS().map(_ + 1)
testStream(mapped)(
AddData(inputData, 1, 2, 3),
StartStream,
CheckAnswer(2, 3, 4),
StopStream,
AddData(inputData, 4, 5, 6),
StartStream,
CheckAnswer(2, 3, 4, 5, 6, 7))
}
test("join") {
// Make a table and ensure it will be broadcast.
val smallTable = Seq((1, "one"), (2, "two"), (4, "four")).toDF("number", "word")
// Join the input stream with a table.
val inputData = MemoryStream[Int]
val joined = inputData.toDS().toDF().join(smallTable, $"value" === $"number")
testStream(joined)(
AddData(inputData, 1, 2, 3),
CheckAnswer(Row(1, 1, "one"), Row(2, 2, "two")),
AddData(inputData, 4),
CheckAnswer(Row(1, 1, "one"), Row(2, 2, "two"), Row(4, 4, "four")))
}
test("union two streams") {
val inputData1 = MemoryStream[Int]
val inputData2 = MemoryStream[Int]
val unioned = inputData1.toDS().union(inputData2.toDS())
testStream(unioned)(
AddData(inputData1, 1, 3, 5),
CheckAnswer(1, 3, 5),
AddData(inputData2, 2, 4, 6),
CheckAnswer(1, 2, 3, 4, 5, 6),
StopStream,
AddData(inputData1, 7),
StartStream,
AddData(inputData2, 8),
CheckAnswer(1, 2, 3, 4, 5, 6, 7, 8))
}
test("sql queries") {
val inputData = MemoryStream[Int]
inputData.toDF().registerTempTable("stream")
val evens = sql("SELECT * FROM stream WHERE value % 2 = 0")
testStream(evens)(
AddData(inputData, 1, 2, 3, 4),
CheckAnswer(2, 4))
}
}
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