#
# 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.
#
library(testthat)
context("SparkSQL functions")
# Tests for SparkSQL functions in SparkR
sc <- sparkR.init()
sqlContext <- sparkRSQL.init(sc)
mockLines <- c("{\"name\":\"Michael\"}",
"{\"name\":\"Andy\", \"age\":30}",
"{\"name\":\"Justin\", \"age\":19}")
jsonPath <- tempfile(pattern="sparkr-test", fileext=".tmp")
parquetPath <- tempfile(pattern="sparkr-test", fileext=".parquet")
writeLines(mockLines, jsonPath)
# For test nafunctions, like dropna(), fillna(),...
mockLinesNa <- c("{\"name\":\"Bob\",\"age\":16,\"height\":176.5}",
"{\"name\":\"Alice\",\"age\":null,\"height\":164.3}",
"{\"name\":\"David\",\"age\":60,\"height\":null}",
"{\"name\":\"Amy\",\"age\":null,\"height\":null}",
"{\"name\":null,\"age\":null,\"height\":null}")
jsonPathNa <- tempfile(pattern="sparkr-test", fileext=".tmp")
writeLines(mockLinesNa, jsonPathNa)
test_that("infer types", {
expect_equal(infer_type(1L), "integer")
expect_equal(infer_type(1.0), "double")
expect_equal(infer_type("abc"), "string")
expect_equal(infer_type(TRUE), "boolean")
expect_equal(infer_type(as.Date("2015-03-11")), "date")
expect_equal(infer_type(as.POSIXlt("2015-03-11 12:13:04.043")), "timestamp")
expect_equal(infer_type(c(1L, 2L)),
list(type = 'array', elementType = "integer", containsNull = TRUE))
expect_equal(infer_type(list(1L, 2L)),
list(type = 'array', elementType = "integer", containsNull = TRUE))
expect_equal(infer_type(list(a = 1L, b = "2")),
structType(structField(x = "a", type = "integer", nullable = TRUE),
structField(x = "b", type = "string", nullable = TRUE)))
e <- new.env()
assign("a", 1L, envir = e)
expect_equal(infer_type(e),
list(type = "map", keyType = "string", valueType = "integer",
valueContainsNull = TRUE))
})
test_that("structType and structField", {
testField <- structField("a", "string")
expect_true(inherits(testField, "structField"))
expect_true(testField$name() == "a")
expect_true(testField$nullable())
testSchema <- structType(testField, structField("b", "integer"))
expect_true(inherits(testSchema, "structType"))
expect_true(inherits(testSchema$fields()[[2]], "structField"))
expect_true(testSchema$fields()[[1]]$dataType.toString() == "StringType")
})
test_that("create DataFrame from RDD", {
rdd <- lapply(parallelize(sc, 1:10), function(x) { list(x, as.character(x)) })
df <- createDataFrame(sqlContext, rdd, list("a", "b"))
expect_true(inherits(df, "DataFrame"))
expect_true(count(df) == 10)
expect_equal(columns(df), c("a", "b"))
expect_equal(dtypes(df), list(c("a", "int"), c("b", "string")))
df <- createDataFrame(sqlContext, rdd)
expect_true(inherits(df, "DataFrame"))
expect_equal(columns(df), c("_1", "_2"))
schema <- structType(structField(x = "a", type = "integer", nullable = TRUE),
structField(x = "b", type = "string", nullable = TRUE))
df <- createDataFrame(sqlContext, rdd, schema)
expect_true(inherits(df, "DataFrame"))
expect_equal(columns(df), c("a", "b"))
expect_equal(dtypes(df), list(c("a", "int"), c("b", "string")))
rdd <- lapply(parallelize(sc, 1:10), function(x) { list(a = x, b = as.character(x)) })
df <- createDataFrame(sqlContext, rdd)
expect_true(inherits(df, "DataFrame"))
expect_true(count(df) == 10)
expect_equal(columns(df), c("a", "b"))
expect_equal(dtypes(df), list(c("a", "int"), c("b", "string")))
})
test_that("toDF", {
rdd <- lapply(parallelize(sc, 1:10), function(x) { list(x, as.character(x)) })
df <- toDF(rdd, list("a", "b"))
expect_true(inherits(df, "DataFrame"))
expect_true(count(df) == 10)
expect_equal(columns(df), c("a", "b"))
expect_equal(dtypes(df), list(c("a", "int"), c("b", "string")))
df <- toDF(rdd)
expect_true(inherits(df, "DataFrame"))
expect_equal(columns(df), c("_1", "_2"))
schema <- structType(structField(x = "a", type = "integer", nullable = TRUE),
structField(x = "b", type = "string", nullable = TRUE))
df <- toDF(rdd, schema)
expect_true(inherits(df, "DataFrame"))
expect_equal(columns(df), c("a", "b"))
expect_equal(dtypes(df), list(c("a", "int"), c("b", "string")))
rdd <- lapply(parallelize(sc, 1:10), function(x) { list(a = x, b = as.character(x)) })
df <- toDF(rdd)
expect_true(inherits(df, "DataFrame"))
expect_true(count(df) == 10)
expect_equal(columns(df), c("a", "b"))
expect_equal(dtypes(df), list(c("a", "int"), c("b", "string")))
})
test_that("create DataFrame from list or data.frame", {
l <- list(list(1, 2), list(3, 4))
df <- createDataFrame(sqlContext, l, c("a", "b"))
expect_equal(columns(df), c("a", "b"))
l <- list(list(a=1, b=2), list(a=3, b=4))
df <- createDataFrame(sqlContext, l)
expect_equal(columns(df), c("a", "b"))
a <- 1:3
b <- c("a", "b", "c")
ldf <- data.frame(a, b)
df <- createDataFrame(sqlContext, ldf)
expect_equal(columns(df), c("a", "b"))
expect_equal(dtypes(df), list(c("a", "int"), c("b", "string")))
expect_equal(count(df), 3)
ldf2 <- collect(df)
expect_equal(ldf$a, ldf2$a)
})
test_that("create DataFrame with different data types", {
l <- list(a = 1L, b = 2, c = TRUE, d = "ss", e = as.Date("2012-12-13"),
f = as.POSIXct("2015-03-15 12:13:14.056"))
df <- createDataFrame(sqlContext, list(l))
expect_equal(dtypes(df), list(c("a", "int"), c("b", "double"), c("c", "boolean"),
c("d", "string"), c("e", "date"), c("f", "timestamp")))
expect_equal(count(df), 1)
expect_equal(collect(df), data.frame(l, stringsAsFactors = FALSE))
})
# TODO: enable this test after fix serialization for nested object
#test_that("create DataFrame with nested array and struct", {
# e <- new.env()
# assign("n", 3L, envir = e)
# l <- list(1:10, list("a", "b"), e, list(a="aa", b=3L))
# df <- createDataFrame(sqlContext, list(l), c("a", "b", "c", "d"))
# expect_equal(dtypes(df), list(c("a", "array<int>"), c("b", "array<string>"),
# c("c", "map<string,int>"), c("d", "struct<a:string,b:int>")))
# expect_equal(count(df), 1)
# ldf <- collect(df)
# expect_equal(ldf[1,], l[[1]])
#})
test_that("jsonFile() on a local file returns a DataFrame", {
df <- jsonFile(sqlContext, jsonPath)
expect_true(inherits(df, "DataFrame"))
expect_true(count(df) == 3)
})
test_that("jsonRDD() on a RDD with json string", {
rdd <- parallelize(sc, mockLines)
expect_true(count(rdd) == 3)
df <- jsonRDD(sqlContext, rdd)
expect_true(inherits(df, "DataFrame"))
expect_true(count(df) == 3)
rdd2 <- flatMap(rdd, function(x) c(x, x))
df <- jsonRDD(sqlContext, rdd2)
expect_true(inherits(df, "DataFrame"))
expect_true(count(df) == 6)
})
test_that("test cache, uncache and clearCache", {
df <- jsonFile(sqlContext, jsonPath)
registerTempTable(df, "table1")
cacheTable(sqlContext, "table1")
uncacheTable(sqlContext, "table1")
clearCache(sqlContext)
dropTempTable(sqlContext, "table1")
})
test_that("test tableNames and tables", {
df <- jsonFile(sqlContext, jsonPath)
registerTempTable(df, "table1")
expect_true(length(tableNames(sqlContext)) == 1)
df <- tables(sqlContext)
expect_true(count(df) == 1)
dropTempTable(sqlContext, "table1")
})
test_that("registerTempTable() results in a queryable table and sql() results in a new DataFrame", {
df <- jsonFile(sqlContext, jsonPath)
registerTempTable(df, "table1")
newdf <- sql(sqlContext, "SELECT * FROM table1 where name = 'Michael'")
expect_true(inherits(newdf, "DataFrame"))
expect_true(count(newdf) == 1)
dropTempTable(sqlContext, "table1")
})
test_that("insertInto() on a registered table", {
df <- read.df(sqlContext, jsonPath, "json")
write.df(df, parquetPath, "parquet", "overwrite")
dfParquet <- read.df(sqlContext, parquetPath, "parquet")
lines <- c("{\"name\":\"Bob\", \"age\":24}",
"{\"name\":\"James\", \"age\":35}")
jsonPath2 <- tempfile(pattern="jsonPath2", fileext=".tmp")
parquetPath2 <- tempfile(pattern = "parquetPath2", fileext = ".parquet")
writeLines(lines, jsonPath2)
df2 <- read.df(sqlContext, jsonPath2, "json")
write.df(df2, parquetPath2, "parquet", "overwrite")
dfParquet2 <- read.df(sqlContext, parquetPath2, "parquet")
registerTempTable(dfParquet, "table1")
insertInto(dfParquet2, "table1")
expect_true(count(sql(sqlContext, "select * from table1")) == 5)
expect_true(first(sql(sqlContext, "select * from table1 order by age"))$name == "Michael")
dropTempTable(sqlContext, "table1")
registerTempTable(dfParquet, "table1")
insertInto(dfParquet2, "table1", overwrite = TRUE)
expect_true(count(sql(sqlContext, "select * from table1")) == 2)
expect_true(first(sql(sqlContext, "select * from table1 order by age"))$name == "Bob")
dropTempTable(sqlContext, "table1")
})
test_that("table() returns a new DataFrame", {
df <- jsonFile(sqlContext, jsonPath)
registerTempTable(df, "table1")
tabledf <- table(sqlContext, "table1")
expect_true(inherits(tabledf, "DataFrame"))
expect_true(count(tabledf) == 3)
dropTempTable(sqlContext, "table1")
})
test_that("toRDD() returns an RRDD", {
df <- jsonFile(sqlContext, jsonPath)
testRDD <- toRDD(df)
expect_true(inherits(testRDD, "RDD"))
expect_true(count(testRDD) == 3)
})
test_that("union on two RDDs created from DataFrames returns an RRDD", {
df <- jsonFile(sqlContext, jsonPath)
RDD1 <- toRDD(df)
RDD2 <- toRDD(df)
unioned <- unionRDD(RDD1, RDD2)
expect_true(inherits(unioned, "RDD"))
expect_true(SparkR:::getSerializedMode(unioned) == "byte")
expect_true(collect(unioned)[[2]]$name == "Andy")
})
test_that("union on mixed serialization types correctly returns a byte RRDD", {
# Byte RDD
nums <- 1:10
rdd <- parallelize(sc, nums, 2L)
# String RDD
textLines <- c("Michael",
"Andy, 30",
"Justin, 19")
textPath <- tempfile(pattern="sparkr-textLines", fileext=".tmp")
writeLines(textLines, textPath)
textRDD <- textFile(sc, textPath)
df <- jsonFile(sqlContext, jsonPath)
dfRDD <- toRDD(df)
unionByte <- unionRDD(rdd, dfRDD)
expect_true(inherits(unionByte, "RDD"))
expect_true(SparkR:::getSerializedMode(unionByte) == "byte")
expect_true(collect(unionByte)[[1]] == 1)
expect_true(collect(unionByte)[[12]]$name == "Andy")
unionString <- unionRDD(textRDD, dfRDD)
expect_true(inherits(unionString, "RDD"))
expect_true(SparkR:::getSerializedMode(unionString) == "byte")
expect_true(collect(unionString)[[1]] == "Michael")
expect_true(collect(unionString)[[5]]$name == "Andy")
})
test_that("objectFile() works with row serialization", {
objectPath <- tempfile(pattern="spark-test", fileext=".tmp")
df <- jsonFile(sqlContext, jsonPath)
dfRDD <- toRDD(df)
saveAsObjectFile(coalesce(dfRDD, 1L), objectPath)
objectIn <- objectFile(sc, objectPath)
expect_true(inherits(objectIn, "RDD"))
expect_equal(SparkR:::getSerializedMode(objectIn), "byte")
expect_equal(collect(objectIn)[[2]]$age, 30)
})
test_that("lapply() on a DataFrame returns an RDD with the correct columns", {
df <- jsonFile(sqlContext, jsonPath)
testRDD <- lapply(df, function(row) {
row$newCol <- row$age + 5
row
})
expect_true(inherits(testRDD, "RDD"))
collected <- collect(testRDD)
expect_true(collected[[1]]$name == "Michael")
expect_true(collected[[2]]$newCol == "35")
})
test_that("collect() returns a data.frame", {
df <- jsonFile(sqlContext, jsonPath)
rdf <- collect(df)
expect_true(is.data.frame(rdf))
expect_true(names(rdf)[1] == "age")
expect_true(nrow(rdf) == 3)
expect_true(ncol(rdf) == 2)
})
test_that("limit() returns DataFrame with the correct number of rows", {
df <- jsonFile(sqlContext, jsonPath)
dfLimited <- limit(df, 2)
expect_true(inherits(dfLimited, "DataFrame"))
expect_true(count(dfLimited) == 2)
})
test_that("collect() and take() on a DataFrame return the same number of rows and columns", {
df <- jsonFile(sqlContext, jsonPath)
expect_true(nrow(collect(df)) == nrow(take(df, 10)))
expect_true(ncol(collect(df)) == ncol(take(df, 10)))
})
test_that("multiple pipeline transformations starting with a DataFrame result in an RDD with the correct values", {
df <- jsonFile(sqlContext, jsonPath)
first <- lapply(df, function(row) {
row$age <- row$age + 5
row
})
second <- lapply(first, function(row) {
row$testCol <- if (row$age == 35 && !is.na(row$age)) TRUE else FALSE
row
})
expect_true(inherits(second, "RDD"))
expect_true(count(second) == 3)
expect_true(collect(second)[[2]]$age == 35)
expect_true(collect(second)[[2]]$testCol)
expect_false(collect(second)[[3]]$testCol)
})
test_that("cache(), persist(), and unpersist() on a DataFrame", {
df <- jsonFile(sqlContext, jsonPath)
expect_false(df@env$isCached)
cache(df)
expect_true(df@env$isCached)
unpersist(df)
expect_false(df@env$isCached)
persist(df, "MEMORY_AND_DISK")
expect_true(df@env$isCached)
unpersist(df)
expect_false(df@env$isCached)
# make sure the data is collectable
expect_true(is.data.frame(collect(df)))
})
test_that("schema(), dtypes(), columns(), names() return the correct values/format", {
df <- jsonFile(sqlContext, jsonPath)
testSchema <- schema(df)
expect_true(length(testSchema$fields()) == 2)
expect_true(testSchema$fields()[[1]]$dataType.toString() == "LongType")
expect_true(testSchema$fields()[[2]]$dataType.simpleString() == "string")
expect_true(testSchema$fields()[[1]]$name() == "age")
testTypes <- dtypes(df)
expect_true(length(testTypes[[1]]) == 2)
expect_true(testTypes[[1]][1] == "age")
testCols <- columns(df)
expect_true(length(testCols) == 2)
expect_true(testCols[2] == "name")
testNames <- names(df)
expect_true(length(testNames) == 2)
expect_true(testNames[2] == "name")
})
test_that("head() and first() return the correct data", {
df <- jsonFile(sqlContext, jsonPath)
testHead <- head(df)
expect_true(nrow(testHead) == 3)
expect_true(ncol(testHead) == 2)
testHead2 <- head(df, 2)
expect_true(nrow(testHead2) == 2)
expect_true(ncol(testHead2) == 2)
testFirst <- first(df)
expect_true(nrow(testFirst) == 1)
})
test_that("distinct() on DataFrames", {
lines <- c("{\"name\":\"Michael\"}",
"{\"name\":\"Andy\", \"age\":30}",
"{\"name\":\"Justin\", \"age\":19}",
"{\"name\":\"Justin\", \"age\":19}")
jsonPathWithDup <- tempfile(pattern="sparkr-test", fileext=".tmp")
writeLines(lines, jsonPathWithDup)
df <- jsonFile(sqlContext, jsonPathWithDup)
uniques <- distinct(df)
expect_true(inherits(uniques, "DataFrame"))
expect_true(count(uniques) == 3)
})
test_that("sample on a DataFrame", {
df <- jsonFile(sqlContext, jsonPath)
sampled <- sample(df, FALSE, 1.0)
expect_equal(nrow(collect(sampled)), count(df))
expect_true(inherits(sampled, "DataFrame"))
sampled2 <- sample(df, FALSE, 0.1)
expect_true(count(sampled2) < 3)
# Also test sample_frac
sampled3 <- sample_frac(df, FALSE, 0.1)
expect_true(count(sampled3) < 3)
})
test_that("select operators", {
df <- select(jsonFile(sqlContext, jsonPath), "name", "age")
expect_true(inherits(df$name, "Column"))
expect_true(inherits(df[[2]], "Column"))
expect_true(inherits(df[["age"]], "Column"))
expect_true(inherits(df[,1], "DataFrame"))
expect_equal(columns(df[,1]), c("name"))
expect_equal(columns(df[,"age"]), c("age"))
df2 <- df[,c("age", "name")]
expect_true(inherits(df2, "DataFrame"))
expect_equal(columns(df2), c("age", "name"))
df$age2 <- df$age
expect_equal(columns(df), c("name", "age", "age2"))
expect_equal(count(where(df, df$age2 == df$age)), 2)
df$age2 <- df$age * 2
expect_equal(columns(df), c("name", "age", "age2"))
expect_equal(count(where(df, df$age2 == df$age * 2)), 2)
df$age2 <- NULL
expect_equal(columns(df), c("name", "age"))
df$age3 <- NULL
expect_equal(columns(df), c("name", "age"))
})
test_that("select with column", {
df <- jsonFile(sqlContext, jsonPath)
df1 <- select(df, "name")
expect_true(columns(df1) == c("name"))
expect_true(count(df1) == 3)
df2 <- select(df, df$age)
expect_true(columns(df2) == c("age"))
expect_true(count(df2) == 3)
})
test_that("selectExpr() on a DataFrame", {
df <- jsonFile(sqlContext, jsonPath)
selected <- selectExpr(df, "age * 2")
expect_true(names(selected) == "(age * 2)")
expect_equal(collect(selected), collect(select(df, df$age * 2L)))
selected2 <- selectExpr(df, "name as newName", "abs(age) as age")
expect_equal(names(selected2), c("newName", "age"))
expect_true(count(selected2) == 3)
})
test_that("column calculation", {
df <- jsonFile(sqlContext, jsonPath)
d <- collect(select(df, alias(df$age + 1, "age2")))
expect_true(names(d) == c("age2"))
df2 <- select(df, lower(df$name), abs(df$age))
expect_true(inherits(df2, "DataFrame"))
expect_true(count(df2) == 3)
})
test_that("read.df() from json file", {
df <- read.df(sqlContext, jsonPath, "json")
expect_true(inherits(df, "DataFrame"))
expect_true(count(df) == 3)
# Check if we can apply a user defined schema
schema <- structType(structField("name", type = "string"),
structField("age", type = "double"))
df1 <- read.df(sqlContext, jsonPath, "json", schema)
expect_true(inherits(df1, "DataFrame"))
expect_equal(dtypes(df1), list(c("name", "string"), c("age", "double")))
# Run the same with loadDF
df2 <- loadDF(sqlContext, jsonPath, "json", schema)
expect_true(inherits(df2, "DataFrame"))
expect_equal(dtypes(df2), list(c("name", "string"), c("age", "double")))
})
test_that("write.df() as parquet file", {
df <- read.df(sqlContext, jsonPath, "json")
write.df(df, parquetPath, "parquet", mode="overwrite")
df2 <- read.df(sqlContext, parquetPath, "parquet")
expect_true(inherits(df2, "DataFrame"))
expect_true(count(df2) == 3)
})
test_that("test HiveContext", {
hiveCtx <- tryCatch({
newJObject("org.apache.spark.sql.hive.test.TestHiveContext", ssc)
}, error = function(err) {
skip("Hive is not build with SparkSQL, skipped")
})
df <- createExternalTable(hiveCtx, "json", jsonPath, "json")
expect_true(inherits(df, "DataFrame"))
expect_true(count(df) == 3)
df2 <- sql(hiveCtx, "select * from json")
expect_true(inherits(df2, "DataFrame"))
expect_true(count(df2) == 3)
jsonPath2 <- tempfile(pattern="sparkr-test", fileext=".tmp")
saveAsTable(df, "json", "json", "append", path = jsonPath2)
df3 <- sql(hiveCtx, "select * from json")
expect_true(inherits(df3, "DataFrame"))
expect_true(count(df3) == 6)
})
test_that("column operators", {
c <- SparkR:::col("a")
c2 <- (- c + 1 - 2) * 3 / 4.0
c3 <- (c + c2 - c2) * c2 %% c2
c4 <- (c > c2) & (c2 <= c3) | (c == c2) & (c2 != c3)
c5 <- c2 ^ c3 ^ c4
})
test_that("column functions", {
c <- SparkR:::col("a")
c2 <- min(c) + max(c) + sum(c) + avg(c) + count(c) + abs(c) + sqrt(c)
c3 <- lower(c) + upper(c) + first(c) + last(c)
c4 <- approxCountDistinct(c) + countDistinct(c) + cast(c, "string")
c5 <- n(c) + n_distinct(c)
c5 <- acos(c) + asin(c) + atan(c) + cbrt(c)
c6 <- ceiling(c) + cos(c) + cosh(c) + exp(c) + expm1(c)
c7 <- floor(c) + log(c) + log10(c) + log1p(c) + rint(c)
c8 <- sign(c) + sin(c) + sinh(c) + tan(c) + tanh(c)
c9 <- toDegrees(c) + toRadians(c)
})
test_that("column binary mathfunctions", {
lines <- c("{\"a\":1, \"b\":5}",
"{\"a\":2, \"b\":6}",
"{\"a\":3, \"b\":7}",
"{\"a\":4, \"b\":8}")
jsonPathWithDup <- tempfile(pattern="sparkr-test", fileext=".tmp")
writeLines(lines, jsonPathWithDup)
df <- jsonFile(sqlContext, jsonPathWithDup)
expect_equal(collect(select(df, atan2(df$a, df$b)))[1, "ATAN2(a, b)"], atan2(1, 5))
expect_equal(collect(select(df, atan2(df$a, df$b)))[2, "ATAN2(a, b)"], atan2(2, 6))
expect_equal(collect(select(df, atan2(df$a, df$b)))[3, "ATAN2(a, b)"], atan2(3, 7))
expect_equal(collect(select(df, atan2(df$a, df$b)))[4, "ATAN2(a, b)"], atan2(4, 8))
expect_equal(collect(select(df, hypot(df$a, df$b)))[1, "HYPOT(a, b)"], sqrt(1^2 + 5^2))
expect_equal(collect(select(df, hypot(df$a, df$b)))[2, "HYPOT(a, b)"], sqrt(2^2 + 6^2))
expect_equal(collect(select(df, hypot(df$a, df$b)))[3, "HYPOT(a, b)"], sqrt(3^2 + 7^2))
expect_equal(collect(select(df, hypot(df$a, df$b)))[4, "HYPOT(a, b)"], sqrt(4^2 + 8^2))
})
test_that("string operators", {
df <- jsonFile(sqlContext, jsonPath)
expect_equal(count(where(df, like(df$name, "A%"))), 1)
expect_equal(count(where(df, startsWith(df$name, "A"))), 1)
expect_equal(first(select(df, substr(df$name, 1, 2)))[[1]], "Mi")
expect_equal(collect(select(df, cast(df$age, "string")))[[2, 1]], "30")
})
test_that("group by", {
df <- jsonFile(sqlContext, jsonPath)
df1 <- agg(df, name = "max", age = "sum")
expect_true(1 == count(df1))
df1 <- agg(df, age2 = max(df$age))
expect_true(1 == count(df1))
expect_equal(columns(df1), c("age2"))
gd <- groupBy(df, "name")
expect_true(inherits(gd, "GroupedData"))
df2 <- count(gd)
expect_true(inherits(df2, "DataFrame"))
expect_true(3 == count(df2))
# Also test group_by, summarize, mean
gd1 <- group_by(df, "name")
expect_true(inherits(gd1, "GroupedData"))
df_summarized <- summarize(gd, mean_age = mean(df$age))
expect_true(inherits(df_summarized, "DataFrame"))
expect_true(3 == count(df_summarized))
df3 <- agg(gd, age = "sum")
expect_true(inherits(df3, "DataFrame"))
expect_true(3 == count(df3))
df3 <- agg(gd, age = sum(df$age))
expect_true(inherits(df3, "DataFrame"))
expect_true(3 == count(df3))
expect_equal(columns(df3), c("name", "age"))
df4 <- sum(gd, "age")
expect_true(inherits(df4, "DataFrame"))
expect_true(3 == count(df4))
expect_true(3 == count(mean(gd, "age")))
expect_true(3 == count(max(gd, "age")))
})
test_that("arrange() and orderBy() on a DataFrame", {
df <- jsonFile(sqlContext, jsonPath)
sorted <- arrange(df, df$age)
expect_true(collect(sorted)[1,2] == "Michael")
sorted2 <- arrange(df, "name")
expect_true(collect(sorted2)[2,"age"] == 19)
sorted3 <- orderBy(df, asc(df$age))
expect_true(is.na(first(sorted3)$age))
expect_true(collect(sorted3)[2, "age"] == 19)
sorted4 <- orderBy(df, desc(df$name))
expect_true(first(sorted4)$name == "Michael")
expect_true(collect(sorted4)[3,"name"] == "Andy")
})
test_that("filter() on a DataFrame", {
df <- jsonFile(sqlContext, jsonPath)
filtered <- filter(df, "age > 20")
expect_true(count(filtered) == 1)
expect_true(collect(filtered)$name == "Andy")
filtered2 <- where(df, df$name != "Michael")
expect_true(count(filtered2) == 2)
expect_true(collect(filtered2)$age[2] == 19)
})
test_that("join() on a DataFrame", {
df <- jsonFile(sqlContext, jsonPath)
mockLines2 <- c("{\"name\":\"Michael\", \"test\": \"yes\"}",
"{\"name\":\"Andy\", \"test\": \"no\"}",
"{\"name\":\"Justin\", \"test\": \"yes\"}",
"{\"name\":\"Bob\", \"test\": \"yes\"}")
jsonPath2 <- tempfile(pattern="sparkr-test", fileext=".tmp")
writeLines(mockLines2, jsonPath2)
df2 <- jsonFile(sqlContext, jsonPath2)
joined <- join(df, df2)
expect_equal(names(joined), c("age", "name", "name", "test"))
expect_true(count(joined) == 12)
joined2 <- join(df, df2, df$name == df2$name)
expect_equal(names(joined2), c("age", "name", "name", "test"))
expect_true(count(joined2) == 3)
joined3 <- join(df, df2, df$name == df2$name, "right_outer")
expect_equal(names(joined3), c("age", "name", "name", "test"))
expect_true(count(joined3) == 4)
expect_true(is.na(collect(orderBy(joined3, joined3$age))$age[2]))
joined4 <- select(join(df, df2, df$name == df2$name, "outer"),
alias(df$age + 5, "newAge"), df$name, df2$test)
expect_equal(names(joined4), c("newAge", "name", "test"))
expect_true(count(joined4) == 4)
expect_equal(collect(orderBy(joined4, joined4$name))$newAge[3], 24)
})
test_that("toJSON() returns an RDD of the correct values", {
df <- jsonFile(sqlContext, jsonPath)
testRDD <- toJSON(df)
expect_true(inherits(testRDD, "RDD"))
expect_true(SparkR:::getSerializedMode(testRDD) == "string")
expect_equal(collect(testRDD)[[1]], mockLines[1])
})
test_that("showDF()", {
df <- jsonFile(sqlContext, jsonPath)
s <- capture.output(showDF(df))
expect_output(s , "+----+-------+\n| age| name|\n+----+-------+\n|null|Michael|\n| 30| Andy|\n| 19| Justin|\n+----+-------+\n")
})
test_that("isLocal()", {
df <- jsonFile(sqlContext, jsonPath)
expect_false(isLocal(df))
})
test_that("unionAll(), except(), and intersect() on a DataFrame", {
df <- jsonFile(sqlContext, jsonPath)
lines <- c("{\"name\":\"Bob\", \"age\":24}",
"{\"name\":\"Andy\", \"age\":30}",
"{\"name\":\"James\", \"age\":35}")
jsonPath2 <- tempfile(pattern="sparkr-test", fileext=".tmp")
writeLines(lines, jsonPath2)
df2 <- read.df(sqlContext, jsonPath2, "json")
unioned <- arrange(unionAll(df, df2), df$age)
expect_true(inherits(unioned, "DataFrame"))
expect_true(count(unioned) == 6)
expect_true(first(unioned)$name == "Michael")
excepted <- arrange(except(df, df2), desc(df$age))
expect_true(inherits(unioned, "DataFrame"))
expect_true(count(excepted) == 2)
expect_true(first(excepted)$name == "Justin")
intersected <- arrange(intersect(df, df2), df$age)
expect_true(inherits(unioned, "DataFrame"))
expect_true(count(intersected) == 1)
expect_true(first(intersected)$name == "Andy")
})
test_that("withColumn() and withColumnRenamed()", {
df <- jsonFile(sqlContext, jsonPath)
newDF <- withColumn(df, "newAge", df$age + 2)
expect_true(length(columns(newDF)) == 3)
expect_true(columns(newDF)[3] == "newAge")
expect_true(first(filter(newDF, df$name != "Michael"))$newAge == 32)
newDF2 <- withColumnRenamed(df, "age", "newerAge")
expect_true(length(columns(newDF2)) == 2)
expect_true(columns(newDF2)[1] == "newerAge")
})
test_that("mutate() and rename()", {
df <- jsonFile(sqlContext, jsonPath)
newDF <- mutate(df, newAge = df$age + 2)
expect_true(length(columns(newDF)) == 3)
expect_true(columns(newDF)[3] == "newAge")
expect_true(first(filter(newDF, df$name != "Michael"))$newAge == 32)
newDF2 <- rename(df, newerAge = df$age)
expect_true(length(columns(newDF2)) == 2)
expect_true(columns(newDF2)[1] == "newerAge")
})
test_that("write.df() on DataFrame and works with parquetFile", {
df <- jsonFile(sqlContext, jsonPath)
write.df(df, parquetPath, "parquet", mode="overwrite")
parquetDF <- parquetFile(sqlContext, parquetPath)
expect_true(inherits(parquetDF, "DataFrame"))
expect_equal(count(df), count(parquetDF))
})
test_that("parquetFile works with multiple input paths", {
df <- jsonFile(sqlContext, jsonPath)
write.df(df, parquetPath, "parquet", mode="overwrite")
parquetPath2 <- tempfile(pattern = "parquetPath2", fileext = ".parquet")
write.df(df, parquetPath2, "parquet", mode="overwrite")
parquetDF <- parquetFile(sqlContext, parquetPath, parquetPath2)
expect_true(inherits(parquetDF, "DataFrame"))
expect_true(count(parquetDF) == count(df)*2)
})
test_that("describe() on a DataFrame", {
df <- jsonFile(sqlContext, jsonPath)
stats <- describe(df, "age")
expect_equal(collect(stats)[1, "summary"], "count")
expect_equal(collect(stats)[2, "age"], "24.5")
expect_equal(collect(stats)[3, "age"], "5.5")
stats <- describe(df)
expect_equal(collect(stats)[4, "name"], "Andy")
expect_equal(collect(stats)[5, "age"], "30")
})
test_that("dropna() on a DataFrame", {
df <- jsonFile(sqlContext, jsonPathNa)
rows <- collect(df)
# drop with columns
expected <- rows[!is.na(rows$name),]
actual <- collect(dropna(df, cols = "name"))
expect_true(identical(expected, actual))
expected <- rows[!is.na(rows$age),]
actual <- collect(dropna(df, cols = "age"))
row.names(expected) <- row.names(actual)
# identical on two dataframes does not work here. Don't know why.
# use identical on all columns as a workaround.
expect_true(identical(expected$age, actual$age))
expect_true(identical(expected$height, actual$height))
expect_true(identical(expected$name, actual$name))
expected <- rows[!is.na(rows$age) & !is.na(rows$height),]
actual <- collect(dropna(df, cols = c("age", "height")))
expect_true(identical(expected, actual))
expected <- rows[!is.na(rows$age) & !is.na(rows$height) & !is.na(rows$name),]
actual <- collect(dropna(df))
expect_true(identical(expected, actual))
# drop with how
expected <- rows[!is.na(rows$age) & !is.na(rows$height) & !is.na(rows$name),]
actual <- collect(dropna(df))
expect_true(identical(expected, actual))
expected <- rows[!is.na(rows$age) | !is.na(rows$height) | !is.na(rows$name),]
actual <- collect(dropna(df, "all"))
expect_true(identical(expected, actual))
expected <- rows[!is.na(rows$age) & !is.na(rows$height) & !is.na(rows$name),]
actual <- collect(dropna(df, "any"))
expect_true(identical(expected, actual))
expected <- rows[!is.na(rows$age) & !is.na(rows$height),]
actual <- collect(dropna(df, "any", cols = c("age", "height")))
expect_true(identical(expected, actual))
expected <- rows[!is.na(rows$age) | !is.na(rows$height),]
actual <- collect(dropna(df, "all", cols = c("age", "height")))
expect_true(identical(expected, actual))
# drop with threshold
expected <- rows[as.integer(!is.na(rows$age)) + as.integer(!is.na(rows$height)) >= 2,]
actual <- collect(dropna(df, minNonNulls = 2, cols = c("age", "height")))
expect_true(identical(expected, actual))
expected <- rows[as.integer(!is.na(rows$age)) +
as.integer(!is.na(rows$height)) +
as.integer(!is.na(rows$name)) >= 3,]
actual <- collect(dropna(df, minNonNulls = 3, cols = c("name", "age", "height")))
expect_true(identical(expected, actual))
})
test_that("fillna() on a DataFrame", {
df <- jsonFile(sqlContext, jsonPathNa)
rows <- collect(df)
# fill with value
expected <- rows
expected$age[is.na(expected$age)] <- 50
expected$height[is.na(expected$height)] <- 50.6
actual <- collect(fillna(df, 50.6))
expect_true(identical(expected, actual))
expected <- rows
expected$name[is.na(expected$name)] <- "unknown"
actual <- collect(fillna(df, "unknown"))
expect_true(identical(expected, actual))
expected <- rows
expected$age[is.na(expected$age)] <- 50
actual <- collect(fillna(df, 50.6, "age"))
expect_true(identical(expected, actual))
expected <- rows
expected$name[is.na(expected$name)] <- "unknown"
actual <- collect(fillna(df, "unknown", c("age", "name")))
expect_true(identical(expected, actual))
# fill with named list
expected <- rows
expected$age[is.na(expected$age)] <- 50
expected$height[is.na(expected$height)] <- 50.6
expected$name[is.na(expected$name)] <- "unknown"
actual <- collect(fillna(df, list("age" = 50, "height" = 50.6, "name" = "unknown")))
expect_true(identical(expected, actual))
})
unlink(parquetPath)
unlink(jsonPath)
unlink(jsonPathNa)