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peer_chooser_test.go
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// Copyright (c) 2021 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package rpc
import (
"context"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"go.uber.org/yarpc/api/peer"
"go.uber.org/yarpc/api/transport"
"github.com/uber/cadence/common/log"
)
func TestDNSPeerChooserFactory(t *testing.T) {
logger := log.NewNoop()
ctx := context.Background()
interval := 100 * time.Millisecond
factory := NewDNSPeerChooserFactory(interval, logger)
peerTransport := &fakePeerTransport{}
// Ensure invalid address returns error
_, err := factory.CreatePeerChooser(peerTransport, "invalid address")
assert.EqualError(t, err, "incorrect DNS:Port format")
chooser, err := factory.CreatePeerChooser(peerTransport, "localhost:1234")
require.NoError(t, err)
require.NoError(t, chooser.Start())
require.True(t, chooser.IsRunning())
// Wait for refresh
time.Sleep(interval)
peer, _, err := chooser.Choose(ctx, &transport.Request{})
require.NoError(t, err)
require.NotNil(t, peer)
assert.Equal(t, "fakePeer", peer.Identifier())
}
type (
fakePeerTransport struct{}
fakePeer struct{}
)
func (t *fakePeerTransport) RetainPeer(peer.Identifier, peer.Subscriber) (peer.Peer, error) {
return &fakePeer{}, nil
}
func (t *fakePeerTransport) ReleasePeer(peer.Identifier, peer.Subscriber) error {
return nil
}
func (p *fakePeer) Identifier() string { return "fakePeer" }
func (p *fakePeer) Status() peer.Status { return peer.Status{ConnectionStatus: peer.Available} }
func (p *fakePeer) StartRequest() {}
func (p *fakePeer) EndRequest() {}