Add more tests

Author: maropu

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

@@ -623,7 +623,9 @@ trait CharVarcharTestSuite extends QueryTest with SQLTestUtils {
       sql(s"CREATE TABLE t2(v VARCHAR(5), c CHAR(8)) USING $format")
       sql("INSERT INTO t1 VALUES ('c', 'b')")
       sql("INSERT INTO t2 VALUES ('a', 'b')")
-      Seq("t1.c = t2.c", "t2.c = t1.c", "t1.c = 'b'", "'b' = t1.c").foreach { predicate =>
+      Seq("t1.c = t2.c", "t2.c = t1.c",
+        "t1.c = 'b'", "'b' = t1.c", "t1.c = 'b    '", "'b    ' = t1.c",
+        "t1.c = 'b      '", "'b      ' = t1.c").foreach { predicate =>
         checkAnswer(sql(
           s"""
              |SELECT v FROM t1
@@ -638,21 +640,23 @@ trait CharVarcharTestSuite extends QueryTest with SQLTestUtils {
     withTable("t") {
       sql(s"CREATE TABLE t(c0 INT, c1 CHAR(5), c2 CHAR(7)) USING $format")
       sql("INSERT INTO t VALUES (1, 'abc', 'abc')")
-      Seq("c1 = 'abc'", "'abc' = c1", "c1 = c2", "c1 IN ('abc', 'defghijk')", "c1 IN (c2)")
-        .foreach { predicate =>
-
-          checkAnswer(sql(
-            s"""
-               |SELECT c0 FROM t t1
-               |WHERE (
-               |  SELECT count(*) AS c
-               |  FROM t
-               |  WHERE c0 = t1.c0 AND $predicate
-               |) > 0
-               |LIMIT 3
-           """.stripMargin),
-            Row(1))
-        }
+      Seq("c1 = 'abc'", "'abc' = c1", "c1 = 'abc  '", "'abc  ' = c1",
+        "c1 = 'abc    '", "'abc    ' = c1", "c1 = c2", "c2 = c1",
+        "c1 IN ('xxx', 'abc', 'xxxxx')", "c1 IN ('xxx', 'abc  ', 'xxxxx')",
+        "c1 IN ('xxx', 'abc    ', 'xxxxx')",
+        "c1 IN (c2)", "c2 IN (c1)").foreach { predicate =>
+        checkAnswer(sql(
+          s"""
+             |SELECT c0 FROM t t1
+             |WHERE (
+             |  SELECT count(*) AS c
+             |  FROM t
+             |  WHERE c0 = t1.c0 AND $predicate
+             |) > 0
+             |LIMIT 3
+         """.stripMargin),
+          Row(1))
+      }
     }
   }
 }