expression/aggregation: migrate test-infra to testify for util_test.go (#27913)

expression/aggregation/main_test.go

@@ -0,0 +1,27 @@
+// Copyright 2021 PingCAP, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package aggregation
+
+import (
+	"testing"
+
+	"github.com/pingcap/tidb/util/testbridge"
+	"go.uber.org/goleak"
+)
+
+func TestMain(m *testing.M) {
+	testbridge.WorkaroundGoCheckFlags()
+	goleak.VerifyTestMain(m)
+}

expression/aggregation/util_test.go

@@ -1,22 +1,19 @@
 package aggregation
 
 import (
+	"testing"
 	"time"
 
-	"github.com/pingcap/check"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
+	"github.com/stretchr/testify/require"
 )
 
-var _ = check.Suite(&testUtilSuite{})
-
-type testUtilSuite struct {
-}
-
-func (s *testUtilSuite) TestDistinct(c *check.C) {
+func TestDistinct(t *testing.T) {
+	t.Parallel()
 	sc := &stmtctx.StatementContext{TimeZone: time.Local}
 	dc := createDistinctChecker(sc)
-	tests := []struct {
+	testCases := []struct {
 		vals   []interface{}
 		expect bool
 	}{
@@ -27,9 +24,9 @@ func (s *testUtilSuite) TestDistinct(c *check.C) {
 		{[]interface{}{1, nil}, true},
 		{[]interface{}{1, nil}, false},
 	}
-	for _, tt := range tests {
-		d, err := dc.Check(types.MakeDatums(tt.vals...))
-		c.Assert(err, check.IsNil)
-		c.Assert(d, check.Equals, tt.expect)
+	for _, tc := range testCases {
+		d, err := dc.Check(types.MakeDatums(tc.vals...))
+		require.NoError(t, err)
+		require.Equal(t, tc.expect, d)
 	}
 }