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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 spark
import org.scalatest.FunSuite
import SparkContext._
class PipedRDDSuite extends FunSuite with SharedSparkContext {
test("basic pipe") {
val nums = sc.makeRDD(Array(1, 2, 3, 4), 2)
val piped = nums.pipe(Seq("cat"))
val c = piped.collect()
assert(c.size === 4)
assert(c(0) === "1")
assert(c(1) === "2")
assert(c(2) === "3")
assert(c(3) === "4")
}
test("advanced pipe") {
val nums = sc.makeRDD(Array(1, 2, 3, 4), 2)
val bl = sc.broadcast(List("0"))
val piped = nums.pipe(Seq("cat"),
Map[String, String](),
(f: String => Unit) => {bl.value.map(f(_));f("\u0001")},
(i:Int, f: String=> Unit) => f(i + "_"))
val c = piped.collect()
assert(c.size === 8)
assert(c(0) === "0")
assert(c(1) === "\u0001")
assert(c(2) === "1_")
assert(c(3) === "2_")
assert(c(4) === "0")
assert(c(5) === "\u0001")
assert(c(6) === "3_")
assert(c(7) === "4_")
val nums1 = sc.makeRDD(Array("a\t1", "b\t2", "a\t3", "b\t4"), 2)
val d = nums1.groupBy(str=>str.split("\t")(0)).
pipe(Seq("cat"),
Map[String, String](),
(f: String => Unit) => {bl.value.map(f(_));f("\u0001")},
(i:Tuple2[String, Seq[String]], f: String=> Unit) => {for (e <- i._2){ f(e + "_")}}).collect()
assert(d.size === 8)
assert(d(0) === "0")
assert(d(1) === "\u0001")
assert(d(2) === "b\t2_")
assert(d(3) === "b\t4_")
assert(d(4) === "0")
assert(d(5) === "\u0001")
assert(d(6) === "a\t1_")
assert(d(7) === "a\t3_")
}
test("pipe with env variable") {
val nums = sc.makeRDD(Array(1, 2, 3, 4), 2)
val piped = nums.pipe(Seq("printenv", "MY_TEST_ENV"), Map("MY_TEST_ENV" -> "LALALA"))
val c = piped.collect()
assert(c.size === 2)
assert(c(0) === "LALALA")
assert(c(1) === "LALALA")
}
test("pipe with non-zero exit status") {
val nums = sc.makeRDD(Array(1, 2, 3, 4), 2)
val piped = nums.pipe(Seq("cat nonexistent_file", "2>", "/dev/null"))
intercept[SparkException] {
piped.collect()
}
}
}
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