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// Copyright 2020 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 merkletree
import (
"fmt"
"testing"
"gvisor.dev/gvisor/pkg/usermem"
)
func TestSize(t *testing.T) {
testCases := []struct {
dataSize int64
expectedLevelStart []int64
}{
{
dataSize: 100,
expectedLevelStart: []int64{0},
},
{
dataSize: 1000000,
expectedLevelStart: []int64{0, 2, 3},
},
{
dataSize: 4096 * int64(usermem.PageSize),
expectedLevelStart: []int64{0, 32, 33},
},
}
for _, tc := range testCases {
t.Run(fmt.Sprintf("%d", tc.dataSize), func(t *testing.T) {
s := MakeSize(tc.dataSize)
if s.blockSize != int64(usermem.PageSize) {
t.Errorf("got blockSize %d, want %d", s.blockSize, usermem.PageSize)
}
if s.digestSize != sha256DigestSize {
t.Errorf("got digestSize %d, want %d", s.digestSize, sha256DigestSize)
}
if len(s.levelStart) != len(tc.expectedLevelStart) {
t.Errorf("got levels %d, want %d", len(s.levelStart), len(tc.expectedLevelStart))
}
for i := 0; i < len(s.levelStart) && i < len(tc.expectedLevelStart); i++ {
if s.levelStart[i] != tc.expectedLevelStart[i] {
t.Errorf("got levelStart[%d] %d, want %d", i, s.levelStart[i], tc.expectedLevelStart[i])
}
}
})
}
}
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