68 lines
1.7 KiB
Go
68 lines
1.7 KiB
Go
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// 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 tcp
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import (
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"testing"
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"github.com/google/go-cmp/cmp"
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"gvisor.dev/gvisor/pkg/tcpip/buffer"
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"gvisor.dev/gvisor/pkg/tcpip/stack"
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)
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type segmentSizeWants struct {
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DataSize int
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SegMemSize int
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}
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func checkSegmentSize(t *testing.T, name string, seg *segment, want segmentSizeWants) {
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t.Helper()
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got := segmentSizeWants{
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DataSize: seg.data.Size(),
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SegMemSize: seg.segMemSize(),
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}
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if diff := cmp.Diff(got, want); diff != "" {
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t.Errorf("%s differs (-want +got):\n%s", name, diff)
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}
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}
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func TestSegmentMerge(t *testing.T) {
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id := stack.TransportEndpointID{}
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seg1 := newOutgoingSegment(id, buffer.NewView(10))
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defer seg1.decRef()
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seg2 := newOutgoingSegment(id, buffer.NewView(20))
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defer seg2.decRef()
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checkSegmentSize(t, "seg1", seg1, segmentSizeWants{
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DataSize: 10,
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SegMemSize: SegSize + 10,
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})
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checkSegmentSize(t, "seg2", seg2, segmentSizeWants{
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DataSize: 20,
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SegMemSize: SegSize + 20,
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})
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seg1.merge(seg2)
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checkSegmentSize(t, "seg1", seg1, segmentSizeWants{
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DataSize: 30,
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SegMemSize: SegSize + 30,
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})
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checkSegmentSize(t, "seg2", seg2, segmentSizeWants{
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DataSize: 0,
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SegMemSize: SegSize,
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})
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}
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