Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/22455#discussion_r226874142
--- Diff: R/pkg/tests/fulltests/test_eager_execution.R ---
@@ -0,0 +1,52 @@
+#
+# 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("Show SparkDataFrame when eager execution is enabled.")
+
+test_that("eager execution is not enabled", {
+ # Start Spark session without eager execution enabled
+ sparkR.session(master = sparkRTestMaster, enableHiveSupport = FALSE)
+
+ df <- createDataFrame(faithful)
+ expect_is(df, "SparkDataFrame")
+ expected <- "eruptions:double, waiting:double"
+ expect_output(show(df), expected)
+
+ # Stop Spark session
+ sparkR.session.stop()
+})
+
+test_that("eager execution is enabled", {
+ # Start Spark session with eager execution enabled
+ sparkConfig <- list(spark.sql.repl.eagerEval.enabled = "true",
+ spark.sql.repl.eagerEval.maxNumRows = as.integer(10))
--- End diff --
add a test with `spark.sql.repl.eagerEval.maxNumRows` not set.
change this test to add `spark.sql.repl.eagerEval.truncate`
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