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// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package epoll
import (
"testing"
"gvisor.dev/gvisor/pkg/sentry/contexttest"
"gvisor.dev/gvisor/pkg/sentry/fs/filetest"
"gvisor.dev/gvisor/pkg/waiter"
)
func TestFileDestroyed(t *testing.T) {
f := filetest.NewTestFile(t)
id := FileIdentifier{f, 12}
ctx := contexttest.Context(t)
efile := NewEventPoll(ctx)
e := efile.FileOperations.(*EventPoll)
if err := e.AddEntry(id, 0, waiter.ReadableEvents, [2]int32{}); err != nil {
t.Fatalf("addEntry failed: %v", err)
}
// Check that we get an event reported twice in a row.
evt := e.ReadEvents(1)
if len(evt) != 1 {
t.Fatalf("Unexpected number of ready events: want %v, got %v", 1, len(evt))
}
evt = e.ReadEvents(1)
if len(evt) != 1 {
t.Fatalf("Unexpected number of ready events: want %v, got %v", 1, len(evt))
}
// Destroy the file. Check that we get no more events.
f.DecRef(ctx)
evt = e.ReadEvents(1)
if len(evt) != 0 {
t.Fatalf("Unexpected number of ready events: want %v, got %v", 0, len(evt))
}
}
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