1 files changed, 59 insertions, 0 deletions
diff --git a/pkg/sentry/fs/filetest/filetest.go b/pkg/sentry/fs/filetest/filetest.go
new file mode 100644
index 000000000..1831aa82f
--- /dev/null
+++ b/pkg/sentry/fs/filetest/filetest.go
@@ -0,0 +1,59 @@
+// Copyright 2018 Google Inc.
+//
+// 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 filetest provides a test implementation of an fs.File.
+package filetest
+
+import (
+	"fmt"
+	"testing"
+
+	"gvisor.googlesource.com/gvisor/pkg/sentry/context"
+	"gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest"
+	"gvisor.googlesource.com/gvisor/pkg/sentry/fs"
+	"gvisor.googlesource.com/gvisor/pkg/sentry/fs/anon"
+	"gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil"
+	"gvisor.googlesource.com/gvisor/pkg/sentry/usermem"
+	"gvisor.googlesource.com/gvisor/pkg/waiter"
+)
+
+// TestFileOperations is an implementation of the File interface. It provides all
+// required methods.
+type TestFileOperations struct {
+	fsutil.NoopRelease   `state:"nosave"`
+	fsutil.PipeSeek      `state:"nosave"`
+	fsutil.NotDirReaddir `state:"nosave"`
+	fsutil.NoFsync       `state:"nosave"`
+	fsutil.NoopFlush     `state:"nosave"`
+	fsutil.NoMMap        `state:"nosave"`
+	fsutil.NoIoctl       `state:"nosave"`
+	waiter.AlwaysReady   `state:"nosave"`
+}
+
+// NewTestFile creates and initializes a new test file.
+func NewTestFile(tb testing.TB) *fs.File {
+	ctx := contexttest.Context(tb)
+	dirent := fs.NewDirent(anon.NewInode(ctx), "test")
+	return fs.NewFile(ctx, dirent, fs.FileFlags{}, &TestFileOperations{})
+}
+
+// Read just fails the request.
+func (*TestFileOperations) Read(context.Context, *fs.File, usermem.IOSequence, int64) (int64, error) {
+	return 0, fmt.Errorf("Readv not implemented")
+}
+
+// Write just fails the request.
+func (*TestFileOperations) Write(context.Context, *fs.File, usermem.IOSequence, int64) (int64, error) {
+	return 0, fmt.Errorf("Writev not implemented")
+}