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/*
Copyright The Soci Snapshotter 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 compression
import (
"testing"
)
func TestNewGzipZinfo(t *testing.T) {
t.Parallel()
testCases := []struct {
name string
zinfoBytes []byte
expectError bool
}{
{
name: "nil zinfoBytes should return error",
zinfoBytes: nil,
expectError: true,
},
{
name: "empty zinfoBytes should return error",
zinfoBytes: []byte{},
expectError: true,
},
{
name: "zinfoBytes with less than 'header size' bytes header should return error",
zinfoBytes: []byte{00},
expectError: true,
},
{
name: "zinfoBytes with too few checkpoints should return error",
zinfoBytes: []byte{
0xFF, 00, 00, 00, // 255 checkpoints
00, 00, 00, 00, 00, 00, 00, 00, // span size 0
// No checkpoint data. We should not try to read 255 checkpoints from this buffer.
},
expectError: true,
},
{
name: "zinfoBytes with zero checkpoints should succeed",
zinfoBytes: []byte{
00, 00, 00, 00, // 0 checkpoints
00, 00, 00, 00, 00, 00, 00, 00, // span size 0
},
expectError: false,
},
{
name: "zinfoBytes v1 with zero checkpoints should succeed",
zinfoBytes: []byte{
01, 00, 00, 00, // 1 checkpoint
00, 00, 00, 00, 00, 00, 00, 00, // span size 0
},
expectError: false,
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
_, err := newGzipZinfo(tc.zinfoBytes)
if tc.expectError != (err != nil) {
t.Fatalf("expect error: %t, actual error: %v", tc.expectError, err)
}
})
}
}
func TestExtractDataFromBuffer(t *testing.T) {
t.Parallel()
testCases := []struct {
name string
gzipZinfo GzipZinfo
compressedBuf []byte
uncompressedSize Offset
uncompressedOffset Offset
spanID SpanID
expectError bool
}{
{
name: "nil buffer should return error",
gzipZinfo: GzipZinfo{},
compressedBuf: nil,
expectError: true,
},
{
name: "empty buffer should return error",
gzipZinfo: GzipZinfo{},
compressedBuf: []byte{},
expectError: true,
},
{
name: "negative uncompressedSize should return error",
gzipZinfo: GzipZinfo{},
compressedBuf: []byte("foobar"),
uncompressedSize: -1,
expectError: true,
},
{
name: "zero uncompressedSize should return empty byte slice",
gzipZinfo: GzipZinfo{},
compressedBuf: []byte("foobar"),
uncompressedSize: 0,
expectError: false,
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
data, err := tc.gzipZinfo.ExtractDataFromBuffer(tc.compressedBuf, tc.uncompressedSize, tc.uncompressedOffset, tc.spanID)
if tc.expectError != (err != nil) {
t.Fatalf("expect error: %t, actual error: %v", tc.expectError, err)
}
if err == nil && len(data) != int(tc.uncompressedSize) {
t.Fatalf("wrong uncompressed size. expect: %d, actual: %d ", len(data), tc.uncompressedSize)
}
})
}
}
func TestExtractDataFromFile(t *testing.T) {
t.Parallel()
testCases := []struct {
name string
gzipZinfo GzipZinfo
filename string
uncompressedSize Offset
uncompressedOffset Offset
expectError bool
}{
{
name: "negative uncompressedSize should return error",
gzipZinfo: GzipZinfo{},
filename: "",
uncompressedSize: -1,
expectError: true,
},
{
name: "zero uncompressedSize should return empty byte slice",
gzipZinfo: GzipZinfo{},
filename: "",
uncompressedSize: 0,
expectError: false,
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
data, err := tc.gzipZinfo.ExtractDataFromFile(tc.filename, tc.uncompressedSize, tc.uncompressedOffset)
if tc.expectError != (err != nil) {
t.Fatalf("expect error: %t, actual error: %v", tc.expectError, err)
}
if err == nil && len(data) != int(tc.uncompressedSize) {
t.Fatalf("wrong uncompressed size. expect: %d, actual: %d ", len(data), tc.uncompressedSize)
}
})
}
}
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