90 lines
2.1 KiB
Go
90 lines
2.1 KiB
Go
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// Copyright 2018 Prometheus Team
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cluster
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import (
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"bytes"
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"context"
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"io"
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"os"
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"testing"
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"github.com/go-kit/kit/log"
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"github.com/hashicorp/memberlist"
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"github.com/prometheus/client_golang/prometheus"
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)
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func TestNormalMessagesGossiped(t *testing.T) {
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var sent bool
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c := newChannel(
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func(_ []byte) { sent = true },
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func() []*memberlist.Node { return nil },
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func(_ *memberlist.Node, _ []byte) error { return nil },
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)
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c.Broadcast([]byte{})
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if sent != true {
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t.Fatalf("small message not sent")
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}
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}
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func TestOversizedMessagesGossiped(t *testing.T) {
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var sent bool
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ctx, cancel := context.WithCancel(context.Background())
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c := newChannel(
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func(_ []byte) {},
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func() []*memberlist.Node { return []*memberlist.Node{&memberlist.Node{}} },
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func(_ *memberlist.Node, _ []byte) error { sent = true; cancel(); return nil },
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)
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f, err := os.Open("/dev/zero")
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if err != nil {
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t.Fatalf("failed to open /dev/zero: %v", err)
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}
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defer f.Close()
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buf := new(bytes.Buffer)
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toCopy := int64(800)
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if n, err := io.CopyN(buf, f, toCopy); err != nil {
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t.Fatalf("failed to copy bytes: %v", err)
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} else if n != toCopy {
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t.Fatalf("wanted to copy %d bytes, only copied %d", toCopy, n)
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}
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c.Broadcast(buf.Bytes())
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<-ctx.Done()
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if sent != true {
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t.Fatalf("oversized message not sent")
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}
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}
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func newChannel(
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send func([]byte),
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peers func() []*memberlist.Node,
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sendOversize func(*memberlist.Node, []byte) error,
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) *Channel {
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return NewChannel(
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"test",
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send,
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peers,
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sendOversize,
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log.NewNopLogger(),
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make(chan struct{}),
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prometheus.NewRegistry(),
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)
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}
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