// Copyright 2023 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 test

import (
	"context"

	"github.com/pingcap/tidb/pkg/kv"
	"github.com/tikv/client-go/v2/util"
)

// CtxMatcher is a matcher for context.Context
type CtxMatcher struct{}

// Matches returns true if the context is internal_stats source.
func (*CtxMatcher) Matches(x any) bool {
	ctx := x.(context.Context)
	s := util.RequestSourceFromCtx(ctx)
	return s == util.InternalRequest+"_"+kv.InternalTxnStats
}

// String returns the description of CtxMatcher.
func (*CtxMatcher) String() string {
	return "all txns should be internal_stats source"
}