[SPARK-15091][SPARKR] Fix warnings and a failure in SparkR test cases with testthat version 1.0.1

## What changes were proposed in this pull request?
Fix warnings and a failure in SparkR test cases with testthat version 1.0.1

## How was this patch tested?
SparkR unit test cases.

Author: Sun Rui <sunrui2016@gmail.com>

Closes apache#12867 from sun-rui/SPARK-15091.

Author: sun-rui

R/pkg/inst/tests/testthat/test_client.R

@@ -32,7 +32,7 @@ test_that("no package specified doesn't add packages flag", {
 })
 
 test_that("multiple packages don't produce a warning", {
-  expect_that(generateSparkSubmitArgs("", "", "", "", c("A", "B")), not(gives_warning()))
+  expect_warning(generateSparkSubmitArgs("", "", "", "", c("A", "B")), NA)
 })
 
 test_that("sparkJars sparkPackages as character vectors", {

R/pkg/inst/tests/testthat/test_context.R

@@ -138,7 +138,7 @@ test_that("sparkJars sparkPackages as comma-separated strings", {
 
   # check normalizePath
   f <- dir()[[1]]
-  expect_that(processSparkJars(f), not(gives_warning()))
+  expect_warning(processSparkJars(f), NA)
   expect_match(processSparkJars(f), f)
 })
 

R/pkg/inst/tests/testthat/test_mllib.R

@@ -450,9 +450,9 @@ test_that("spark.survreg", {
   if (requireNamespace("survival", quietly = TRUE)) {
     rData <- list(time = c(4, 3, 1, 1, 2, 2, 3), status = c(1, 1, 1, 0, 1, 1, 0),
                  x = c(0, 2, 1, 1, 1, 0, 0), sex = c(0, 0, 0, 0, 1, 1, 1))
-    expect_that(
+    expect_error(
       model <- survival::survreg(formula = survival::Surv(time, status) ~ x + sex, data = rData),
-      not(throws_error()))
+      NA)
     expect_equal(predict(model, rData)[[1]], 3.724591, tolerance = 1e-4)
   }
 })

R/pkg/inst/tests/testthat/test_sparkSQL.R

@@ -1196,9 +1196,9 @@ test_that("date functions on a DataFrame", {
                c(as.POSIXlt("2012-12-13 21:34:00 UTC"), as.POSIXlt("2014-12-15 10:24:34 UTC")))
   expect_equal(collect(select(df2, to_utc_timestamp(df2$b, "JST")))[, 1],
                c(as.POSIXlt("2012-12-13 03:34:00 UTC"), as.POSIXlt("2014-12-14 16:24:34 UTC")))
-  expect_more_than(collect(select(df2, unix_timestamp()))[1, 1], 0)
-  expect_more_than(collect(select(df2, unix_timestamp(df2$b)))[1, 1], 0)
-  expect_more_than(collect(select(df2, unix_timestamp(lit("2015-01-01"), "yyyy-MM-dd")))[1, 1], 0)
+  expect_gt(collect(select(df2, unix_timestamp()))[1, 1], 0)
+  expect_gt(collect(select(df2, unix_timestamp(df2$b)))[1, 1], 0)
+  expect_gt(collect(select(df2, unix_timestamp(lit("2015-01-01"), "yyyy-MM-dd")))[1, 1], 0)
 
   l3 <- list(list(a = 1000), list(a = -1000))
   df3 <- createDataFrame(sqlContext, l3)
@@ -1502,15 +1502,14 @@ test_that("toJSON() returns an RDD of the correct values", {
 
 test_that("showDF()", {
   df <- read.json(sqlContext, jsonPath)
-  s <- capture.output(showDF(df))
   expected <- paste("+----+-------+\n",
                     "| age|   name|\n",
                     "+----+-------+\n",
                     "|null|Michael|\n",
                     "|  30|   Andy|\n",
                     "|  19| Justin|\n",
                     "+----+-------+\n", sep = "")
-  expect_output(s, expected)
+  expect_output(showDF(df), expected)
 })
 
 test_that("isLocal()", {
@@ -1896,7 +1895,7 @@ test_that("Method as.data.frame as a synonym for collect()", {
   expect_equal(as.data.frame(irisDF2), collect(irisDF2))
 
   # Make sure as.data.frame in the R base package is not covered
-  expect_that(as.data.frame(c(1, 2)), not(throws_error()))
+  expect_error(as.data.frame(c(1, 2)), NA)
 })
 
 test_that("attach() on a DataFrame", {