76 lines
1.8 KiB
Go
76 lines
1.8 KiB
Go
// Copyright 2021 The gVisor Authors.
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//
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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 eventfd
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import (
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"testing"
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"time"
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)
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func TestReadWrite(t *testing.T) {
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efd, err := Create()
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if err != nil {
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t.Fatalf("failed to Create(): %v", err)
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}
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defer efd.Close()
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// Make sure we can read actual values
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const want = 343
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if err := efd.Write(want); err != nil {
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t.Fatalf("failed to write value: %d", want)
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}
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got, err := efd.Read()
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if err != nil {
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t.Fatalf("failed to read value: %v", err)
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}
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if got != want {
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t.Fatalf("Read(): got %d, but wanted %d", got, want)
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}
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}
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func TestWait(t *testing.T) {
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efd, err := Create()
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if err != nil {
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t.Fatalf("failed to Create(): %v", err)
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}
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defer efd.Close()
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// There's no way to test with certainty that Wait() blocks indefinitely, but
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// as a best-effort we can wait a bit on it.
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errCh := make(chan error)
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go func() {
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errCh <- efd.Wait()
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}()
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select {
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case err := <-errCh:
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t.Fatalf("Wait() returned without a call to Notify(): %v", err)
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case <-time.After(500 * time.Millisecond):
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}
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// Notify and check that Wait() returned.
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if err := efd.Notify(); err != nil {
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t.Fatalf("Notify() failed: %v", err)
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}
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select {
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case err := <-errCh:
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if err != nil {
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t.Fatalf("Read() failed: %v", err)
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}
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case <-time.After(5 * time.Second):
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t.Fatalf("Read() did not return after Notify()")
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}
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}
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