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[TEST] Different behaviors of SparkContext Conf when building SparkSession #18517

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[TEST] Different behaviors of SparkContext Conf when building SparkSession #18517

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19 changes: 19 additions & 0 deletions sql/core/src/test/scala/org/apache/spark/sql/SparkSessionBuilderSuite.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -98,12 +98,31 @@ class SparkSessionBuilderSuite extends SparkFunSuite {
val session = SparkSession.builder().config("key2", "value2").getOrCreate()
assert(session.conf.get("key1") == "value1")
assert(session.conf.get("key2") == "value2")
assert(session.sparkContext == sparkContext2)
assert(session.sparkContext.conf.get("key1") == "value1")
// If the created sparkContext is not passed through the Builder's API sparkContext,
// the conf of this sparkContext will also contain the conf set through the API config.
assert(session.sparkContext.conf.get("key2") == "value2")
assert(session.sparkContext.conf.get("spark.app.name") == "test")
session.stop()
}

test("create SparkContext first then pass context to SparkSession") {
sparkContext.stop()
val conf = new SparkConf().setAppName("test").setMaster("local").set("key1", "value1")
val newSC = new SparkContext(conf)
val session = SparkSession.builder().sparkContext(newSC).config("key2", "value2").getOrCreate()
assert(session.conf.get("key1") == "value1")
assert(session.conf.get("key2") == "value2")
assert(session.sparkContext == newSC)
assert(session.sparkContext.conf.get("key1") == "value1")
// If the created sparkContext is passed through the Builder's API sparkContext,
// the conf of this sparkContext will not contain the conf set through the API config.
assert(!session.sparkContext.conf.contains("key2"))
assert(session.sparkContext.conf.get("spark.app.name") == "test")
session.stop()
}

test("SPARK-15887: hive-site.xml should be loaded") {
val session = SparkSession.builder().master("local").getOrCreate()
assert(session.sessionState.newHadoopConf().get("hive.in.test") == "true")
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