github.com/cloudwego/hertz@v0.9.3/pkg/common/test/mock/reader_test.go (about)

     1  /*
     2   * Copyright 2022 CloudWeGo Authors
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package mock
    18  
    19  import (
    20  	"bufio"
    21  	"io"
    22  	"testing"
    23  	"testing/iotest"
    24  
    25  	"github.com/cloudwego/hertz/pkg/common/test/assert"
    26  )
    27  
    28  func TestZeroCopyReader(t *testing.T) {
    29  	// raw
    30  	r := "abcdef4343"
    31  	zr := NewZeroCopyReader(r)
    32  	rs := readBytes(zr.Reader)
    33  	assert.DeepEqual(t, rs, r)
    34  
    35  	// peek
    36  	zr = NewZeroCopyReader(r)
    37  	s, err := zr.Peek(1)
    38  	assert.DeepEqual(t, nil, err)
    39  	assert.DeepEqual(t, "a", string(s))
    40  
    41  	s, err = zr.Peek(4)
    42  	assert.DeepEqual(t, nil, err)
    43  	assert.DeepEqual(t, "abcd", string(s))
    44  
    45  	// https://github.com/golang/go/issues/50569
    46  	ezr := NewZeroCopyReader("")
    47  	s, err = ezr.Peek(32)
    48  	assert.DeepEqual(t, io.EOF, err)
    49  	assert.DeepEqual(t, "", string(s))
    50  
    51  	// skip
    52  	err = zr.Skip(1)
    53  	assert.DeepEqual(t, nil, err)
    54  
    55  	s, err = zr.Peek(4)
    56  	assert.DeepEqual(t, nil, err)
    57  	assert.DeepEqual(t, "bcde", string(s))
    58  
    59  	// len
    60  	assert.DeepEqual(t, len(r)-1, zr.Len())
    61  	assert.DeepEqual(t, nil, ezr.Release())
    62  	assert.Panic(t, func() { // not implement
    63  		zr.ReadBinary(10)
    64  	})
    65  }
    66  
    67  func TestEOFReader(t *testing.T) {
    68  	r := &EOFReader{}
    69  	s, err := r.Peek(1)
    70  	assert.DeepEqual(t, io.EOF, err)
    71  	assert.DeepEqual(t, "", string(s))
    72  	assert.DeepEqual(t, nil, r.Skip(1))
    73  	assert.DeepEqual(t, 0, r.Len())
    74  
    75  	_, err = r.ReadByte()
    76  	assert.DeepEqual(t, io.EOF, err)
    77  	_, err = r.ReadBinary(10)
    78  	assert.DeepEqual(t, io.EOF, err)
    79  	_, err = r.Read(s)
    80  	assert.DeepEqual(t, io.EOF, err)
    81  	assert.DeepEqual(t, nil, r.Release())
    82  }
    83  
    84  func readBytes(buf *bufio.Reader) string {
    85  	var b [1000]byte
    86  	nb := 0
    87  	for {
    88  		c, err := buf.ReadByte()
    89  		if err == io.EOF {
    90  			break
    91  		}
    92  		if err == nil {
    93  			b[nb] = c
    94  			nb++
    95  		} else if err != iotest.ErrTimeout {
    96  			panic("Data: " + err.Error())
    97  		}
    98  	}
    99  	return string(b[0:nb])
   100  }