util/disjointset: remove pingcap/check for test (#26484)

util/disjointset/int_set_test.go

@@ -16,24 +16,14 @@ package disjointset
 import (
 	"testing"
 
-	. "github.com/pingcap/check"
+	"github.com/stretchr/testify/assert"
 )
 
-var _ = Suite(&testDisjointSetSuite{})
-
-func TestT(t *testing.T) {
-	CustomVerboseFlag = true
-	TestingT(t)
-}
-
-type testDisjointSetSuite struct {
-}
-
-func (s *testDisjointSetSuite) TestIntDisjointSet(c *C) {
+func TestIntDisjointSet(t *testing.T) {
 	set := NewIntSet(10)
-	c.Assert(len(set.parent), Equals, 10)
+	assert.Len(t, set.parent, 10)
 	for i := range set.parent {
-		c.Assert(set.parent[i], Equals, i)
+		assert.Equal(t, i, set.parent[i])
 	}
 	set.Union(0, 1)
 	set.Union(1, 3)
@@ -42,11 +32,11 @@ func (s *testDisjointSetSuite) TestIntDisjointSet(c *C) {
 	set.Union(3, 5)
 	set.Union(7, 8)
 	set.Union(9, 6)
-	c.Assert(set.FindRoot(0), Equals, set.FindRoot(1))
-	c.Assert(set.FindRoot(3), Equals, set.FindRoot(1))
-	c.Assert(set.FindRoot(5), Equals, set.FindRoot(1))
-	c.Assert(set.FindRoot(2), Equals, set.FindRoot(4))
-	c.Assert(set.FindRoot(6), Equals, set.FindRoot(4))
-	c.Assert(set.FindRoot(9), Equals, set.FindRoot(2))
-	c.Assert(set.FindRoot(7), Equals, set.FindRoot(8))
+	assert.Equal(t, set.FindRoot(0), set.FindRoot(1))
+	assert.Equal(t, set.FindRoot(3), set.FindRoot(1))
+	assert.Equal(t, set.FindRoot(5), set.FindRoot(1))
+	assert.Equal(t, set.FindRoot(2), set.FindRoot(4))
+	assert.Equal(t, set.FindRoot(6), set.FindRoot(4))
+	assert.Equal(t, set.FindRoot(9), set.FindRoot(2))
+	assert.Equal(t, set.FindRoot(7), set.FindRoot(8))
 }

util/disjointset/main_test.go

@@ -0,0 +1,26 @@
+// 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,
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package disjointset
+
+import (
+	"testing"
+
+	"github.com/pingcap/tidb/util/testbridge"
+	"go.uber.org/goleak"
+)
+
+func TestMain(m *testing.M) {
+	testbridge.WorkaroundGoCheckFlags()
+	goleak.VerifyTestMain(m)
+}