82 lines
2 KiB
Go
82 lines
2 KiB
Go
/*
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Copyright 2016 Google Inc. All Rights Reserved.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package internal
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import (
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"google.golang.org/grpc/naming"
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"testing"
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"time"
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)
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func TestConnectionPool(t *testing.T) {
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addr := "127.0.0.1:123"
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ds := DialSettings{Endpoint: addr}
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pr := NewPoolResolver(4, &ds)
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watcher, err := pr.Resolve(addr)
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if err != nil {
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t.Fatalf("Resolve: %v", err)
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}
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updates, err := watcher.Next()
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if err != nil {
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t.Fatalf("Next: %v", err)
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}
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if len(updates) != 4 {
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t.Fatalf("Update count: %v", err)
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}
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metaSeen := make(map[interface{}]bool)
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for _, u := range updates {
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if u.Addr != addr {
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t.Errorf("Addr from update: wanted %v, got %v", addr, u.Addr)
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}
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// Metadata must be unique
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if metaSeen[u.Metadata] {
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t.Errorf("Wanted %v to be unique, got %v", u.Metadata, metaSeen)
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}
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metaSeen[u.Metadata] = true
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}
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// Test that Next blocks until Close and returns nil.
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nextc := make(chan []*naming.Update)
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closedc := make(chan bool)
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go func() {
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next, err := watcher.Next()
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if err != nil {
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t.Errorf("Next: expected success, got %v", err)
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}
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nextc <- next
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}()
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go func() {
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time.Sleep(50 * time.Millisecond)
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watcher.Close()
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close(closedc)
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}()
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select {
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case <-nextc:
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t.Fatalf("Next: second invocation didn't block, returned before Close()")
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case <-closedc:
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// OK, watcher was closed before Next() returned.
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}
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select {
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case next := <-nextc:
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if next != nil {
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t.Errorf("Next: expected nil, got %v", next)
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}
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case <-time.After(100 * time.Millisecond):
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t.Error("Next: did not return after 100ms")
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}
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}
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