Add also tests in engine_test.go

Signed-off-by: Juanjo Alvarez <[email protected]>

Author: Juanjo Alvarez

engine_test.go

@@ -877,6 +877,14 @@ var queries = []struct {
 		"SELECT substring(s, 1, 1), count(*) FROM mytable GROUP BY substring(s, 1, 1)",
 		[]sql.Row{{"f", int64(1)}, {"s", int64(1)}, {"t", int64(1)}},
 	},
+	{
+		"SELECT TO_BASE64('foo')",
+		[]sql.Row{{string("Zm9v")}},
+	},
+	{
+		"SELECT FROM_BASE64('YmFy')",
+		[]sql.Row{{string("bar")}},
+	},
 }
 
 func TestQueries(t *testing.T) {