github.com/hack0072008/kafka-go@v1.0.1/protocol/buffer_test.go (about)

     1  package protocol
     2  
     3  import (
     4  	"bytes"
     5  	"io"
     6  	"io/ioutil"
     7  	"testing"
     8  )
     9  
    10  func TestPageBufferWriteReadSeek(t *testing.T) {
    11  	buffer := newPageBuffer()
    12  	defer buffer.unref()
    13  
    14  	io.WriteString(buffer, "Hello World!")
    15  
    16  	if n := buffer.Size(); n != 12 {
    17  		t.Fatal("invalid size:", n)
    18  	}
    19  
    20  	for i := 0; i < 3; i++ {
    21  		if n := buffer.Len(); n != 12 {
    22  			t.Fatal("invalid length before read:", n)
    23  		}
    24  
    25  		b, err := ioutil.ReadAll(buffer)
    26  		if err != nil {
    27  			t.Fatal(err)
    28  		}
    29  
    30  		if n := buffer.Len(); n != 0 {
    31  			t.Fatal("invalid length after read:", n)
    32  		}
    33  
    34  		if string(b) != "Hello World!" {
    35  			t.Fatalf("invalid content after read #%d: %q", i, b)
    36  		}
    37  
    38  		offset, err := buffer.Seek(0, io.SeekStart)
    39  		if err != nil {
    40  			t.Fatal(err)
    41  		}
    42  		if offset != 0 {
    43  			t.Fatalf("invalid offset after seek #%d: %d", i, offset)
    44  		}
    45  	}
    46  }
    47  
    48  func TestPageRefWriteReadSeek(t *testing.T) {
    49  	buffer := newPageBuffer()
    50  	defer buffer.unref()
    51  
    52  	io.WriteString(buffer, "Hello World!")
    53  
    54  	ref := buffer.ref(1, 11)
    55  	defer ref.unref()
    56  
    57  	if n := ref.Size(); n != 10 {
    58  		t.Fatal("invalid size:", n)
    59  	}
    60  
    61  	for i := 0; i < 3; i++ {
    62  		if n := ref.Len(); n != 10 {
    63  			t.Fatal("invalid length before read:", n)
    64  		}
    65  
    66  		b, err := ioutil.ReadAll(ref)
    67  		if err != nil {
    68  			t.Fatal(err)
    69  		}
    70  
    71  		if n := ref.Len(); n != 0 {
    72  			t.Fatal("invalid length after read:", n)
    73  		}
    74  
    75  		if string(b) != "ello World" {
    76  			t.Fatalf("invalid content after read #%d: %q", i, b)
    77  		}
    78  
    79  		offset, err := ref.Seek(0, io.SeekStart)
    80  		if err != nil {
    81  			t.Fatal(err)
    82  		}
    83  		if offset != 0 {
    84  			t.Fatalf("invalid offset after seek #%d: %d", i, offset)
    85  		}
    86  	}
    87  }
    88  
    89  func TestPageRefReadByte(t *testing.T) {
    90  	buffer := newPageBuffer()
    91  	defer buffer.unref()
    92  
    93  	content := bytes.Repeat([]byte("1234567890"), 10e3)
    94  	buffer.Write(content)
    95  
    96  	ref := buffer.ref(0, buffer.Size())
    97  	defer ref.unref()
    98  
    99  	for i, c := range content {
   100  		b, err := ref.ReadByte()
   101  		if err != nil {
   102  			t.Fatal(err)
   103  		}
   104  		if b != c {
   105  			t.Fatalf("byte at offset %d mismatch, expected '%c' but got '%c'", i, c, b)
   106  		}
   107  	}
   108  }