gvisor.dev/gvisor@v0.0.0-20240520182842-f9d4d51c7e0f/pkg/compressio/nocompressio_test.go (about)

     1  // Copyright 2023 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package compressio
    16  
    17  import (
    18  	"bytes"
    19  	"fmt"
    20  	"io"
    21  	"math/rand"
    22  	"testing"
    23  	"time"
    24  )
    25  
    26  func TestNoCompress(t *testing.T) {
    27  	rand.Seed(time.Now().Unix())
    28  
    29  	var (
    30  		data  = initTest(t, 10*1024*1024)
    31  		data0 = data[:0]
    32  		data1 = data[:1]
    33  		data2 = data[:11]
    34  		data3 = data[:16]
    35  		data4 = data[:]
    36  	)
    37  
    38  	for _, data := range [][]byte{data0, data1, data2, data3, data4} {
    39  		for _, blockSize := range []uint32{1, 4, 1024, 4 * 1024, 16 * 1024} {
    40  			// Skip annoying tests; they just take too long.
    41  			if blockSize <= 16 && len(data) > 16 {
    42  				continue
    43  			}
    44  
    45  			for _, key := range [][]byte{nil, hashKey} {
    46  				for _, corruptData := range []bool{false, true} {
    47  					if key == nil && corruptData {
    48  						// No need to test corrupt data
    49  						// case when not doing hashing.
    50  						continue
    51  					}
    52  					// Do the compress test.
    53  					doTest(t, testOpts{
    54  						Name: fmt.Sprintf("len(data)=%d, blockSize=%d, key=%s, corruptData=%v", len(data), blockSize, string(key), corruptData),
    55  						Data: data,
    56  						NewWriter: func(b *bytes.Buffer) (io.Writer, error) {
    57  							return NewSimpleWriter(b, key)
    58  						},
    59  						NewReader: func(b *bytes.Buffer) (io.Reader, error) {
    60  							return NewSimpleReader(b, key)
    61  						},
    62  						CorruptData: corruptData,
    63  					})
    64  				}
    65  			}
    66  		}
    67  	}
    68  }