move tests

Author: adrian-wang

sql/core/src/test/scala/org/apache/spark/sql/DataFrameFunctionsSuite.scala

@@ -85,7 +85,7 @@ class DataFrameFunctionsSuite extends QueryTest {
     }
   }
 
-  test("constant function") {
+  test("constant functions") {
     checkAnswer(
       testData2.select(e()).limit(1),
       Row(scala.math.E)
@@ -94,6 +94,14 @@ class DataFrameFunctionsSuite extends QueryTest {
       testData2.select(pi()).limit(1),
       Row(scala.math.Pi)
     )
+    checkAnswer(
+      ctx.sql("SELECT E()"),
+      Row(scala.math.E)
+    )
+    checkAnswer(
+      ctx.sql("SELECT PI()"),
+      Row(scala.math.Pi)
+    )
   }
 
   test("bitwiseNOT") {

sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala

@@ -145,17 +145,6 @@ class SQLQuerySuite extends QueryTest with BeforeAndAfterAll with SQLTestUtils {
       Seq(Row("1"), Row("2")))
   }
 
-  test("constant functions") {
-    checkAnswer(
-      sql("SELECT E()"),
-      Row(scala.math.E)
-    )
-    checkAnswer(
-      sql("SELECT PI()"),
-      Row(scala.math.Pi)
-    )
-  }
-
   test("SPARK-3176 Added Parser of SQL ABS()") {
     checkAnswer(
       sql("SELECT ABS(-1.3)"),