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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.
+#
+
+context("tests RDD function take()")
+
+# Mock data
+numVector <- c(-10:97)
+numList <- list(sqrt(1), sqrt(2), sqrt(3), 4 ** 10)
+strVector <- c("Dexter Morgan: I suppose I should be upset, even feel",
+ "violated, but I'm not. No, in fact, I think this is a friendly",
+ "message, like \"Hey, wanna play?\" and yes, I want to play. ",
+ "I really, really do.")
+strList <- list("Dexter Morgan: Blood. Sometimes it sets my teeth on edge, ",
+ "other times it helps me control the chaos.",
+ "Dexter Morgan: Harry and Dorris Morgan did a wonderful job ",
+ "raising me. But they're both dead now. I didn't kill them. Honest.")
+
+# JavaSparkContext handle
+jsc <- sparkR.init()
+
+test_that("take() gives back the original elements in correct count and order", {
+ numVectorRDD <- parallelize(jsc, numVector, 10)
+ # case: number of elements to take is less than the size of the first partition
+ expect_equal(take(numVectorRDD, 1), as.list(head(numVector, n = 1)))
+ # case: number of elements to take is the same as the size of the first partition
+ expect_equal(take(numVectorRDD, 11), as.list(head(numVector, n = 11)))
+ # case: number of elements to take is greater than all elements
+ expect_equal(take(numVectorRDD, length(numVector)), as.list(numVector))
+ expect_equal(take(numVectorRDD, length(numVector) + 1), as.list(numVector))
+
+ numListRDD <- parallelize(jsc, numList, 1)
+ numListRDD2 <- parallelize(jsc, numList, 4)
+ expect_equal(take(numListRDD, 3), take(numListRDD2, 3))
+ expect_equal(take(numListRDD, 5), take(numListRDD2, 5))
+ expect_equal(take(numListRDD, 1), as.list(head(numList, n = 1)))
+ expect_equal(take(numListRDD2, 999), numList)
+
+ strVectorRDD <- parallelize(jsc, strVector, 2)
+ strVectorRDD2 <- parallelize(jsc, strVector, 3)
+ expect_equal(take(strVectorRDD, 4), as.list(strVector))
+ expect_equal(take(strVectorRDD2, 2), as.list(head(strVector, n = 2)))
+
+ strListRDD <- parallelize(jsc, strList, 4)
+ strListRDD2 <- parallelize(jsc, strList, 1)
+ expect_equal(take(strListRDD, 3), as.list(head(strList, n = 3)))
+ expect_equal(take(strListRDD2, 1), as.list(head(strList, n = 1)))
+
+ expect_equal(length(take(strListRDD, 0)), 0)
+ expect_equal(length(take(strVectorRDD, 0)), 0)
+ expect_equal(length(take(numListRDD, 0)), 0)
+ expect_equal(length(take(numVectorRDD, 0)), 0)
+})