pkg/test/grpc/clientstream.go

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 grpc

import (
	"context"
	"io"
	"sync"
)

import (
	envoy_sd "github.com/envoyproxy/go-control-plane/envoy/service/discovery/v3"

	"google.golang.org/grpc"
)

type MockClientStream struct {
	Ctx    context.Context
	SentCh chan *envoy_sd.DiscoveryRequest
	RecvCh chan *envoy_sd.DiscoveryResponse
	grpc.ClientStream
	closed bool
	sync.RWMutex
}

func (stream *MockClientStream) Context() context.Context {
	return stream.Ctx
}

func (stream *MockClientStream) Send(resp *envoy_sd.DiscoveryRequest) error {
	stream.RLock()
	defer stream.RUnlock()
	if stream.closed {
		return io.EOF
	}
	stream.SentCh <- resp
	return nil
}

func (stream *MockClientStream) Recv() (*envoy_sd.DiscoveryResponse, error) {
	req, more := <-stream.RecvCh
	if !more {
		return nil, io.EOF
	}
	return req, nil
}

func NewMockClientStream() *MockClientStream {
	return &MockClientStream{
		Ctx:    context.Background(),
		RecvCh: make(chan *envoy_sd.DiscoveryResponse, 10),
		SentCh: make(chan *envoy_sd.DiscoveryRequest, 10),
	}
}

func (stream *MockClientStream) CloseSend() error {
	stream.Lock()
	defer stream.Unlock()
	close(stream.SentCh)
	stream.closed = true
	return nil
}

type MockDeltaClientStream struct {
	Ctx    context.Context
	SentCh chan *envoy_sd.DeltaDiscoveryRequest
	RecvCh chan *envoy_sd.DeltaDiscoveryResponse
	grpc.ClientStream
	closed bool
	sync.RWMutex
}

func (stream *MockDeltaClientStream) Context() context.Context {
	return stream.Ctx
}

func (stream *MockDeltaClientStream) Send(resp *envoy_sd.DeltaDiscoveryRequest) error {
	stream.RLock()
	defer stream.RUnlock()
	if stream.closed {
		return io.EOF
	}
	stream.SentCh <- resp
	return nil
}

func (stream *MockDeltaClientStream) Recv() (*envoy_sd.DeltaDiscoveryResponse, error) {
	req, more := <-stream.RecvCh
	if !more {
		return nil, io.EOF
	}
	return req, nil
}

func NewMockDeltaClientStream() *MockDeltaClientStream {
	return &MockDeltaClientStream{
		Ctx:    context.Background(),
		RecvCh: make(chan *envoy_sd.DeltaDiscoveryResponse, 10),
		SentCh: make(chan *envoy_sd.DeltaDiscoveryRequest, 10),
	}
}

func (stream *MockDeltaClientStream) CloseSend() error {
	stream.Lock()
	defer stream.Unlock()
	close(stream.SentCh)
	stream.closed = true
	return nil
}