/
fake_peer_chooser.go
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/
fake_peer_chooser.go
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// Copyright (c) 2018 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 yarpctest
import (
"context"
"fmt"
"go.uber.org/yarpc/api/peer"
"go.uber.org/yarpc/api/transport"
"go.uber.org/yarpc/pkg/lifecycletest"
)
// FakePeerChooserOption is an option for NewFakePeerChooser.
type FakePeerChooserOption func(*FakePeerChooser)
// ChooserNop is a fake option for NewFakePeerChooser that sets a nop var. It's fake.
func ChooserNop(nop string) func(*FakePeerChooser) {
return func(u *FakePeerChooser) {
u.nop = nop
}
}
// FakePeerChooser is a fake peer chooser.
type FakePeerChooser struct {
transport.Lifecycle
nop string
}
// NewFakePeerChooser returns a fake peer list.
func NewFakePeerChooser(opts ...FakePeerChooserOption) *FakePeerChooser {
pl := &FakePeerChooser{
Lifecycle: lifecycletest.NewNop(),
}
for _, opt := range opts {
opt(pl)
}
return pl
}
// Choose pretends to choose a peer, but actually always returns an error. It's fake.
func (c *FakePeerChooser) Choose(ctx context.Context, req *transport.Request) (peer.Peer, func(error), error) {
return nil, nil, fmt.Errorf(`fake peer chooser can't actually choose peers`)
}
// Nop returns the Peer Chooser's nop variable.
func (c *FakePeerChooser) Nop() string {
return c.nop
}