60 lines
1.9 KiB
Go
60 lines
1.9 KiB
Go
// Copyright 2018 Google Inc.
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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 device
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import (
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"testing"
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)
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func TestMultiDevice(t *testing.T) {
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device := &MultiDevice{}
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// Check that Load fails to install virtual inodes that are
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// uninitialized.
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if device.Load(MultiDeviceKey{}, 0) {
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t.Fatalf("got load of invalid virtual inode 0, want unsuccessful")
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}
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inode := device.Map(MultiDeviceKey{})
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// Assert that the same raw device and inode map to
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// a consistent virtual inode.
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if i := device.Map(MultiDeviceKey{}); i != inode {
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t.Fatalf("got inode %d, want %d in %s", i, inode, device)
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}
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// Assert that a new inode or new device does not conflict.
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if i := device.Map(MultiDeviceKey{Device: 0, Inode: 1}); i == inode {
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t.Fatalf("got reused inode %d, want new distinct inode in %s", i, device)
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}
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last := device.Map(MultiDeviceKey{Device: 1, Inode: 0})
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if last == inode {
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t.Fatalf("got reused inode %d, want new distinct inode in %s", last, device)
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}
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// Virtual is the virtual inode we want to load.
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virtual := last + 1
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// Assert that we can load a virtual inode at a new place.
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if !device.Load(MultiDeviceKey{Device: 0, Inode: 2}, virtual) {
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t.Fatalf("got load of virtual inode %d failed, want success in %s", virtual, device)
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}
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// Assert that the next inode skips over the loaded one.
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if i := device.Map(MultiDeviceKey{Device: 0, Inode: 3}); i != virtual+1 {
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t.Fatalf("got inode %d, want %d in %s", i, virtual+1, device)
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}
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}
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