tidb: add enum type test

tidb_test.go

@@ -894,6 +894,24 @@ func (s *testSessionSuite) TestBootstrap(c *C) {
 	mustExecSQL(c, se, "USE test;")
 }
 
+func (s *testSessionSuite) TestEnum(c *C) {
+	store := newStore(c, s.dbName)
+	se := newSession(c, store, s.dbName)
+
+	mustExecSQL(c, se, "drop table if exists t")
+	mustExecSQL(c, se, "create table t (c enum('a', 'b', 'c'))")
+	mustExecSQL(c, se, "insert into t values ('a'), (2), ('c')")
+	r := mustExecSQL(c, se, "select * from t where c = 'a'")
+	row, err := r.FirstRow()
+	c.Assert(err, IsNil)
+	match(c, row, "a")
+
+	r = mustExecSQL(c, se, "select c + 1 from t where c = 2")
+	row, err = r.FirstRow()
+	c.Assert(err, IsNil)
+	match(c, row, "3")
+}
+
 func newSession(c *C, store kv.Storage, dbName string) Session {
 	se, err := CreateSession(store)
 	c.Assert(err, IsNil)