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path: root/src/pkg/bytes/reader_test.go
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Diffstat (limited to 'src/pkg/bytes/reader_test.go')
-rw-r--r--src/pkg/bytes/reader_test.go246
1 files changed, 0 insertions, 246 deletions
diff --git a/src/pkg/bytes/reader_test.go b/src/pkg/bytes/reader_test.go
deleted file mode 100644
index d3dce5349..000000000
--- a/src/pkg/bytes/reader_test.go
+++ /dev/null
@@ -1,246 +0,0 @@
-// Copyright 2012 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package bytes_test
-
-import (
- . "bytes"
- "fmt"
- "io"
- "io/ioutil"
- "os"
- "sync"
- "testing"
-)
-
-func TestReader(t *testing.T) {
- r := NewReader([]byte("0123456789"))
- tests := []struct {
- off int64
- seek int
- n int
- want string
- wantpos int64
- seekerr string
- }{
- {seek: os.SEEK_SET, off: 0, n: 20, want: "0123456789"},
- {seek: os.SEEK_SET, off: 1, n: 1, want: "1"},
- {seek: os.SEEK_CUR, off: 1, wantpos: 3, n: 2, want: "34"},
- {seek: os.SEEK_SET, off: -1, seekerr: "bytes.Reader.Seek: negative position"},
- {seek: os.SEEK_SET, off: 1 << 33, wantpos: 1 << 33},
- {seek: os.SEEK_CUR, off: 1, wantpos: 1<<33 + 1},
- {seek: os.SEEK_SET, n: 5, want: "01234"},
- {seek: os.SEEK_CUR, n: 5, want: "56789"},
- {seek: os.SEEK_END, off: -1, n: 1, wantpos: 9, want: "9"},
- }
-
- for i, tt := range tests {
- pos, err := r.Seek(tt.off, tt.seek)
- if err == nil && tt.seekerr != "" {
- t.Errorf("%d. want seek error %q", i, tt.seekerr)
- continue
- }
- if err != nil && err.Error() != tt.seekerr {
- t.Errorf("%d. seek error = %q; want %q", i, err.Error(), tt.seekerr)
- continue
- }
- if tt.wantpos != 0 && tt.wantpos != pos {
- t.Errorf("%d. pos = %d, want %d", i, pos, tt.wantpos)
- }
- buf := make([]byte, tt.n)
- n, err := r.Read(buf)
- if err != nil {
- t.Errorf("%d. read = %v", i, err)
- continue
- }
- got := string(buf[:n])
- if got != tt.want {
- t.Errorf("%d. got %q; want %q", i, got, tt.want)
- }
- }
-}
-
-func TestReadAfterBigSeek(t *testing.T) {
- r := NewReader([]byte("0123456789"))
- if _, err := r.Seek(1<<31+5, os.SEEK_SET); err != nil {
- t.Fatal(err)
- }
- if n, err := r.Read(make([]byte, 10)); n != 0 || err != io.EOF {
- t.Errorf("Read = %d, %v; want 0, EOF", n, err)
- }
-}
-
-func TestReaderAt(t *testing.T) {
- r := NewReader([]byte("0123456789"))
- tests := []struct {
- off int64
- n int
- want string
- wanterr interface{}
- }{
- {0, 10, "0123456789", nil},
- {1, 10, "123456789", io.EOF},
- {1, 9, "123456789", nil},
- {11, 10, "", io.EOF},
- {0, 0, "", nil},
- {-1, 0, "", "bytes.Reader.ReadAt: negative offset"},
- }
- for i, tt := range tests {
- b := make([]byte, tt.n)
- rn, err := r.ReadAt(b, tt.off)
- got := string(b[:rn])
- if got != tt.want {
- t.Errorf("%d. got %q; want %q", i, got, tt.want)
- }
- if fmt.Sprintf("%v", err) != fmt.Sprintf("%v", tt.wanterr) {
- t.Errorf("%d. got error = %v; want %v", i, err, tt.wanterr)
- }
- }
-}
-
-func TestReaderAtConcurrent(t *testing.T) {
- // Test for the race detector, to verify ReadAt doesn't mutate
- // any state.
- r := NewReader([]byte("0123456789"))
- var wg sync.WaitGroup
- for i := 0; i < 5; i++ {
- wg.Add(1)
- go func(i int) {
- defer wg.Done()
- var buf [1]byte
- r.ReadAt(buf[:], int64(i))
- }(i)
- }
- wg.Wait()
-}
-
-func TestEmptyReaderConcurrent(t *testing.T) {
- // Test for the race detector, to verify a Read that doesn't yield any bytes
- // is okay to use from multiple goroutines. This was our historic behavior.
- // See golang.org/issue/7856
- r := NewReader([]byte{})
- var wg sync.WaitGroup
- for i := 0; i < 5; i++ {
- wg.Add(2)
- go func() {
- defer wg.Done()
- var buf [1]byte
- r.Read(buf[:])
- }()
- go func() {
- defer wg.Done()
- r.Read(nil)
- }()
- }
- wg.Wait()
-}
-
-func TestReaderWriteTo(t *testing.T) {
- for i := 0; i < 30; i += 3 {
- var l int
- if i > 0 {
- l = len(data) / i
- }
- s := data[:l]
- r := NewReader(testBytes[:l])
- var b Buffer
- n, err := r.WriteTo(&b)
- if expect := int64(len(s)); n != expect {
- t.Errorf("got %v; want %v", n, expect)
- }
- if err != nil {
- t.Errorf("for length %d: got error = %v; want nil", l, err)
- }
- if b.String() != s {
- t.Errorf("got string %q; want %q", b.String(), s)
- }
- if r.Len() != 0 {
- t.Errorf("reader contains %v bytes; want 0", r.Len())
- }
- }
-}
-
-func TestReaderLen(t *testing.T) {
- const data = "hello world"
- r := NewReader([]byte(data))
- if got, want := r.Len(), 11; got != want {
- t.Errorf("r.Len(): got %d, want %d", got, want)
- }
- if n, err := r.Read(make([]byte, 10)); err != nil || n != 10 {
- t.Errorf("Read failed: read %d %v", n, err)
- }
- if got, want := r.Len(), 1; got != want {
- t.Errorf("r.Len(): got %d, want %d", got, want)
- }
- if n, err := r.Read(make([]byte, 1)); err != nil || n != 1 {
- t.Errorf("Read failed: read %d %v", n, err)
- }
- if got, want := r.Len(), 0; got != want {
- t.Errorf("r.Len(): got %d, want %d", got, want)
- }
-}
-
-var UnreadRuneErrorTests = []struct {
- name string
- f func(*Reader)
-}{
- {"Read", func(r *Reader) { r.Read([]byte{0}) }},
- {"ReadByte", func(r *Reader) { r.ReadByte() }},
- {"UnreadRune", func(r *Reader) { r.UnreadRune() }},
- {"Seek", func(r *Reader) { r.Seek(0, 1) }},
- {"WriteTo", func(r *Reader) { r.WriteTo(&Buffer{}) }},
-}
-
-func TestUnreadRuneError(t *testing.T) {
- for _, tt := range UnreadRuneErrorTests {
- reader := NewReader([]byte("0123456789"))
- if _, _, err := reader.ReadRune(); err != nil {
- // should not happen
- t.Fatal(err)
- }
- tt.f(reader)
- err := reader.UnreadRune()
- if err == nil {
- t.Errorf("Unreading after %s: expected error", tt.name)
- }
- }
-}
-
-func TestReaderDoubleUnreadRune(t *testing.T) {
- buf := NewBuffer([]byte("groucho"))
- if _, _, err := buf.ReadRune(); err != nil {
- // should not happen
- t.Fatal(err)
- }
- if err := buf.UnreadByte(); err != nil {
- // should not happen
- t.Fatal(err)
- }
- if err := buf.UnreadByte(); err == nil {
- t.Fatal("UnreadByte: expected error, got nil")
- }
-}
-
-// verify that copying from an empty reader always has the same results,
-// regardless of the presence of a WriteTo method.
-func TestReaderCopyNothing(t *testing.T) {
- type nErr struct {
- n int64
- err error
- }
- type justReader struct {
- io.Reader
- }
- type justWriter struct {
- io.Writer
- }
- discard := justWriter{ioutil.Discard} // hide ReadFrom
-
- var with, withOut nErr
- with.n, with.err = io.Copy(discard, NewReader(nil))
- withOut.n, withOut.err = io.Copy(discard, justReader{NewReader(nil)})
- if with != withOut {
- t.Errorf("behavior differs: with = %#v; without: %#v", with, withOut)
- }
-}
generated by cgit v1.2.3 (git 2.39.1) at 2025-04-29 11:32:35 +0000