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// Copyright 2019 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 buffer
import (
"reflect"
"testing"
)
func TestNewPrependableFromView(t *testing.T) {
tests := []struct {
comment string
view View
extraSize int
want Prependable
}{
{
comment: "Reserve extra space",
view: View("abc"),
extraSize: 2,
want: Prependable{buf: View("\x00\x00abc"), usedIdx: 2},
},
{
comment: "Don't reserve extra space",
view: View("abc"),
extraSize: 0,
want: Prependable{buf: View("abc"), usedIdx: 0},
},
}
for _, testCase := range tests {
t.Run(testCase.comment, func(t *testing.T) {
prep := NewPrependableFromView(testCase.view, testCase.extraSize)
if !reflect.DeepEqual(prep, testCase.want) {
t.Errorf("NewPrependableFromView(%#v, %d) = %#v; want %#v", testCase.view, testCase.extraSize, prep, testCase.want)
}
} )
}
}
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