uros-db commented on code in PR #45933:
URL: https://github.com/apache/spark/pull/45933#discussion_r1567172792


##########
sql/core/src/test/scala/org/apache/spark/sql/CollationStringExpressionsSuite.scala:
##########
@@ -161,6 +161,78 @@ class CollationStringExpressionsSuite
     })
   }
 
+  test("Ascii & UnBase64 string expressions with collation") {
+    case class AsciiUnBase64TestCase[R](q: String, dt: DataType, r: R)
+    val testCases = Seq(
+      AsciiUnBase64TestCase("select ascii('a' collate utf8_binary)", 
IntegerType, Row(97)),
+      AsciiUnBase64TestCase("select ascii('a' collate utf8_binary_lcase)", 
IntegerType, Row(97)),
+      AsciiUnBase64TestCase("select unbase64('YQ==' collate utf8_binary)", 
BinaryType,
+        Row(Seq(97))),
+      AsciiUnBase64TestCase("select unbase64('YQ==' collate 
utf8_binary_lcase)", BinaryType,
+        Row(Seq(97)))
+    )
+    testCases.foreach(t => {
+      // Result & data type
+      checkAnswer(sql(t.q), t.r)

Review Comment:
   ```suggestion
         checkAnswer(sql(t.q), Row(t.r))
   ```
   
   (and other places too, to keep tests consistent)



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