ddl: make several test cases stable for make ut

ddl/db_partition_test.go

@@ -3553,6 +3553,13 @@ func TestRenameTables(t *testing.T) {
 	ddl.ExportTestRenameTables(t)
 }
 
+func TestCreateTables(t *testing.T) {
+	_, clean := ntestkit.CreateMockStore(t)
+	defer clean()
+
+	ddl.ExportTestRenameTables(t)
+}
+
 func (s *testIntegrationSuite1) TestDuplicatePartitionNames(c *C) {
 	tk := testkit.NewTestKit(c, s.store)
 

ddl/integration_test.go

@@ -119,3 +119,17 @@ func TestDDLStatementsBackFill(t *testing.T) {
 		require.Equal(t, tc.expectedNeedReorg, needReorg, tc)
 	}
 }
+
+func TestSchema(t *testing.T) {
+	_, clean := testkit.CreateMockStore(t)
+	defer clean()
+
+	ddl.ExportTestSchema(t)
+}
+
+func TestTestSerialStatSuite(t *testing.T) {
+	_, clean := testkit.CreateMockStore(t)
+	defer clean()
+
+	ddl.ExportTestSerialStatSuite(t)
+}

ddl/schema_test.go

@@ -141,7 +141,7 @@ func testCheckSchemaState(test *testing.T, d *ddl, dbInfo *model.DBInfo, state m
 	}
 }
 
-func TestSchema(t *testing.T) {
+func ExportTestSchema(t *testing.T) {
 	store := testCreateStore(t, "test_schema")
 	defer func() {
 		err := store.Close()

ddl/stat_test.go

@@ -42,7 +42,7 @@ type testSerialStatSuiteToVerify struct {
 	suite.Suite
 }
 
-func TestSerialStatSuite(t *testing.T) {
+func ExportTestSerialStatSuite(t *testing.T) {
 	suite.Run(t, new(testSerialStatSuiteToVerify))
 }
 

ddl/table_test.go

@@ -402,7 +402,7 @@ func ExportTestRenameTables(t *testing.T) {
 	require.Equal(t, wantTblInfos[1].Name.L, "tt2")
 }
 
-func TestCreateTables(t *testing.T) {
+func ExportTestCreateTables(t *testing.T) {
 	store, err := mockstore.NewMockStore()
 	require.NoError(t, err)
 	defer func() {