github.com/whtcorpsinc/MilevaDB-Prod@v0.0.0-20211104133533-f57f4be3b597/soliton/codec/bytes_test.go (about)

     1  // Copyright 2020 WHTCORPS INC, Inc.
     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  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package codec
    15  
    16  import (
    17  	. "github.com/whtcorpsinc/check"
    18  	"github.com/whtcorpsinc/milevadb/soliton/testleak"
    19  )
    20  
    21  var _ = Suite(&testBytesSuite{})
    22  
    23  type testBytesSuite struct {
    24  }
    25  
    26  func (s *testBytesSuite) TestFastSlowFastReverse(c *C) {
    27  	if !supportsUnaligned {
    28  		return
    29  	}
    30  	b := []byte{1, 2, 3, 4, 5, 6, 7, 8, 255, 0, 0, 0, 0, 0, 0, 0, 0, 247}
    31  	r1 := b
    32  	fastReverseBytes(b)
    33  	r2 := b
    34  	reverseBytes(r2)
    35  	c.Assert(r1, BytesEquals, r2)
    36  }
    37  
    38  func (s *testBytesSuite) TestBytesCodec(c *C) {
    39  	defer testleak.AfterTest(c)()
    40  	inputs := []struct {
    41  		enc  []byte
    42  		dec  []byte
    43  		desc bool
    44  	}{
    45  		{[]byte{}, []byte{0, 0, 0, 0, 0, 0, 0, 0, 247}, false},
    46  		{[]byte{}, []byte{255, 255, 255, 255, 255, 255, 255, 255, 8}, true},
    47  		{[]byte{0}, []byte{0, 0, 0, 0, 0, 0, 0, 0, 248}, false},
    48  		{[]byte{0}, []byte{255, 255, 255, 255, 255, 255, 255, 255, 7}, true},
    49  		{[]byte{1, 2, 3}, []byte{1, 2, 3, 0, 0, 0, 0, 0, 250}, false},
    50  		{[]byte{1, 2, 3}, []byte{254, 253, 252, 255, 255, 255, 255, 255, 5}, true},
    51  		{[]byte{1, 2, 3, 0}, []byte{1, 2, 3, 0, 0, 0, 0, 0, 251}, false},
    52  		{[]byte{1, 2, 3, 0}, []byte{254, 253, 252, 255, 255, 255, 255, 255, 4}, true},
    53  		{[]byte{1, 2, 3, 4, 5, 6, 7}, []byte{1, 2, 3, 4, 5, 6, 7, 0, 254}, false},
    54  		{[]byte{1, 2, 3, 4, 5, 6, 7}, []byte{254, 253, 252, 251, 250, 249, 248, 255, 1}, true},
    55  		{[]byte{0, 0, 0, 0, 0, 0, 0, 0}, []byte{0, 0, 0, 0, 0, 0, 0, 0, 255, 0, 0, 0, 0, 0, 0, 0, 0, 247}, false},
    56  		{[]byte{0, 0, 0, 0, 0, 0, 0, 0}, []byte{255, 255, 255, 255, 255, 255, 255, 255, 0, 255, 255, 255, 255, 255, 255, 255, 255, 8}, true},
    57  		{[]byte{1, 2, 3, 4, 5, 6, 7, 8}, []byte{1, 2, 3, 4, 5, 6, 7, 8, 255, 0, 0, 0, 0, 0, 0, 0, 0, 247}, false},
    58  		{[]byte{1, 2, 3, 4, 5, 6, 7, 8}, []byte{254, 253, 252, 251, 250, 249, 248, 247, 0, 255, 255, 255, 255, 255, 255, 255, 255, 8}, true},
    59  		{[]byte{1, 2, 3, 4, 5, 6, 7, 8, 9}, []byte{1, 2, 3, 4, 5, 6, 7, 8, 255, 9, 0, 0, 0, 0, 0, 0, 0, 248}, false},
    60  		{[]byte{1, 2, 3, 4, 5, 6, 7, 8, 9}, []byte{254, 253, 252, 251, 250, 249, 248, 247, 0, 246, 255, 255, 255, 255, 255, 255, 255, 7}, true},
    61  	}
    62  
    63  	for _, input := range inputs {
    64  
    65  		c.Assert(EncodedBytesLength(len(input.enc)), Equals, len(input.dec))
    66  
    67  		if input.desc {
    68  			b := EncodeBytesDesc(nil, input.enc)
    69  			c.Assert(b, BytesEquals, input.dec)
    70  			_, d, err := DecodeBytesDesc(b, nil)
    71  			c.Assert(err, IsNil)
    72  			c.Assert(d, BytesEquals, input.enc)
    73  		} else {
    74  			b := EncodeBytes(nil, input.enc)
    75  			c.Assert(b, BytesEquals, input.dec)
    76  			_, d, err := DecodeBytes(b, nil)
    77  			c.Assert(err, IsNil)
    78  			c.Assert(d, BytesEquals, input.enc)
    79  		}
    80  	}
    81  
    82  	// Test error decode.
    83  	errInputs := [][]byte{
    84  		{1, 2, 3, 4},
    85  		{0, 0, 0, 0, 0, 0, 0, 247},
    86  		{0, 0, 0, 0, 0, 0, 0, 0, 246},
    87  		{0, 0, 0, 0, 0, 0, 0, 1, 247},
    88  		{1, 2, 3, 4, 5, 6, 7, 8, 0},
    89  		{1, 2, 3, 4, 5, 6, 7, 8, 255, 1},
    90  		{1, 2, 3, 4, 5, 6, 7, 8, 255, 1, 2, 3, 4, 5, 6, 7, 8},
    91  		{1, 2, 3, 4, 5, 6, 7, 8, 255, 1, 2, 3, 4, 5, 6, 7, 8, 255},
    92  		{1, 2, 3, 4, 5, 6, 7, 8, 255, 1, 2, 3, 4, 5, 6, 7, 8, 0},
    93  	}
    94  
    95  	for _, input := range errInputs {
    96  		_, _, err := DecodeBytes(input, nil)
    97  		c.Assert(err, NotNil)
    98  	}
    99  }