github.com/Psiphon-Labs/psiphon-tunnel-core@v2.0.28+incompatible/psiphon/common/crypto/ssh/buffer_test.go (about)

     1  // Copyright 2011 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package ssh
     6  
     7  import (
     8  	"io"
     9  	"testing"
    10  )
    11  
    12  var alphabet = []byte("abcdefghijklmnopqrstuvwxyz")
    13  
    14  func TestBufferReadwrite(t *testing.T) {
    15  	b := newBuffer()
    16  	b.write(alphabet[:10])
    17  	r, _ := b.Read(make([]byte, 10))
    18  	if r != 10 {
    19  		t.Fatalf("Expected written == read == 10, written: 10, read %d", r)
    20  	}
    21  
    22  	b = newBuffer()
    23  	b.write(alphabet[:5])
    24  	r, _ = b.Read(make([]byte, 10))
    25  	if r != 5 {
    26  		t.Fatalf("Expected written == read == 5, written: 5, read %d", r)
    27  	}
    28  
    29  	b = newBuffer()
    30  	b.write(alphabet[:10])
    31  	r, _ = b.Read(make([]byte, 5))
    32  	if r != 5 {
    33  		t.Fatalf("Expected written == 10, read == 5, written: 10, read %d", r)
    34  	}
    35  
    36  	b = newBuffer()
    37  	b.write(alphabet[:5])
    38  	b.write(alphabet[5:15])
    39  	r, _ = b.Read(make([]byte, 10))
    40  	r2, _ := b.Read(make([]byte, 10))
    41  	if r != 10 || r2 != 5 || 15 != r+r2 {
    42  		t.Fatal("Expected written == read == 15")
    43  	}
    44  }
    45  
    46  func TestBufferClose(t *testing.T) {
    47  	b := newBuffer()
    48  	b.write(alphabet[:10])
    49  	b.eof()
    50  	_, err := b.Read(make([]byte, 5))
    51  	if err != nil {
    52  		t.Fatal("expected read of 5 to not return EOF")
    53  	}
    54  	b = newBuffer()
    55  	b.write(alphabet[:10])
    56  	b.eof()
    57  	r, err := b.Read(make([]byte, 5))
    58  	r2, err2 := b.Read(make([]byte, 10))
    59  	if r != 5 || r2 != 5 || err != nil || err2 != nil {
    60  		t.Fatal("expected reads of 5 and 5")
    61  	}
    62  
    63  	b = newBuffer()
    64  	b.write(alphabet[:10])
    65  	b.eof()
    66  	r, err = b.Read(make([]byte, 5))
    67  	r2, err2 = b.Read(make([]byte, 10))
    68  	r3, err3 := b.Read(make([]byte, 10))
    69  	if r != 5 || r2 != 5 || r3 != 0 || err != nil || err2 != nil || err3 != io.EOF {
    70  		t.Fatal("expected reads of 5 and 5 and 0, with EOF")
    71  	}
    72  
    73  	b = newBuffer()
    74  	b.write(make([]byte, 5))
    75  	b.write(make([]byte, 10))
    76  	b.eof()
    77  	r, err = b.Read(make([]byte, 9))
    78  	r2, err2 = b.Read(make([]byte, 3))
    79  	r3, err3 = b.Read(make([]byte, 3))
    80  	r4, err4 := b.Read(make([]byte, 10))
    81  	if err != nil || err2 != nil || err3 != nil || err4 != io.EOF {
    82  		t.Fatalf("Expected EOF on forth read only, err=%v, err2=%v, err3=%v, err4=%v", err, err2, err3, err4)
    83  	}
    84  	if r != 9 || r2 != 3 || r3 != 3 || r4 != 0 {
    85  		t.Fatal("Expected written == read == 15", r, r2, r3, r4)
    86  	}
    87  }