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Source file src/google.golang.org/grpc/internal/testutils/wrappers.go

Documentation: google.golang.org/grpc/internal/testutils

     1  /*
     2   *
     3   * Copyright 2022 gRPC authors.
     4   *
     5   * Licensed under the Apache License, Version 2.0 (the "License");
     6   * you may not use this file except in compliance with the License.
     7   * You may obtain a copy of the License at
     8   *
     9   *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   *
    17   */
    18  
    19  package testutils
    20  
    21  import (
    22  	"net"
    23  	"testing"
    24  )
    25  
    26  // ConnWrapper wraps a net.Conn and pushes on a channel when closed.
    27  type ConnWrapper struct {
    28  	net.Conn
    29  	CloseCh *Channel
    30  }
    31  
    32  // Close closes the connection and sends a value on the close channel.
    33  func (cw *ConnWrapper) Close() error {
    34  	err := cw.Conn.Close()
    35  	cw.CloseCh.Replace(nil)
    36  	return err
    37  }
    38  
    39  // ListenerWrapper wraps a net.Listener and the returned net.Conn.
    40  //
    41  // It pushes on a channel whenever it accepts a new connection.
    42  type ListenerWrapper struct {
    43  	net.Listener
    44  	NewConnCh *Channel
    45  }
    46  
    47  // Accept wraps the Listener Accept and sends the accepted connection on a
    48  // channel.
    49  func (l *ListenerWrapper) Accept() (net.Conn, error) {
    50  	c, err := l.Listener.Accept()
    51  	if err != nil {
    52  		return nil, err
    53  	}
    54  	closeCh := NewChannel()
    55  	conn := &ConnWrapper{Conn: c, CloseCh: closeCh}
    56  	l.NewConnCh.Send(conn)
    57  	return conn, nil
    58  }
    59  
    60  // NewListenerWrapper returns a ListenerWrapper.
    61  func NewListenerWrapper(t *testing.T, lis net.Listener) *ListenerWrapper {
    62  	if lis == nil {
    63  		var err error
    64  		lis, err = LocalTCPListener()
    65  		if err != nil {
    66  			t.Fatal(err)
    67  		}
    68  	}
    69  
    70  	return &ListenerWrapper{
    71  		Listener:  lis,
    72  		NewConnCh: NewChannel(),
    73  	}
    74  }
    75  

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