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Diffstat (limited to 'src/pkg/io/io_test.go')
-rw-r--r--src/pkg/io/io_test.go341
1 files changed, 0 insertions, 341 deletions
diff --git a/src/pkg/io/io_test.go b/src/pkg/io/io_test.go
deleted file mode 100644
index 57db1fbf0..000000000
--- a/src/pkg/io/io_test.go
+++ /dev/null
@@ -1,341 +0,0 @@
-// Copyright 2009 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 io_test
-
-import (
- "bytes"
- "errors"
- "fmt"
- . "io"
- "strings"
- "testing"
-)
-
-// An version of bytes.Buffer without ReadFrom and WriteTo
-type Buffer struct {
- bytes.Buffer
- ReaderFrom // conflicts with and hides bytes.Buffer's ReaderFrom.
- WriterTo // conflicts with and hides bytes.Buffer's WriterTo.
-}
-
-// Simple tests, primarily to verify the ReadFrom and WriteTo callouts inside Copy and CopyN.
-
-func TestCopy(t *testing.T) {
- rb := new(Buffer)
- wb := new(Buffer)
- rb.WriteString("hello, world.")
- Copy(wb, rb)
- if wb.String() != "hello, world." {
- t.Errorf("Copy did not work properly")
- }
-}
-
-func TestCopyReadFrom(t *testing.T) {
- rb := new(Buffer)
- wb := new(bytes.Buffer) // implements ReadFrom.
- rb.WriteString("hello, world.")
- Copy(wb, rb)
- if wb.String() != "hello, world." {
- t.Errorf("Copy did not work properly")
- }
-}
-
-func TestCopyWriteTo(t *testing.T) {
- rb := new(bytes.Buffer) // implements WriteTo.
- wb := new(Buffer)
- rb.WriteString("hello, world.")
- Copy(wb, rb)
- if wb.String() != "hello, world." {
- t.Errorf("Copy did not work properly")
- }
-}
-
-// Version of bytes.Buffer that checks whether WriteTo was called or not
-type writeToChecker struct {
- bytes.Buffer
- writeToCalled bool
-}
-
-func (wt *writeToChecker) WriteTo(w Writer) (int64, error) {
- wt.writeToCalled = true
- return wt.Buffer.WriteTo(w)
-}
-
-// It's preferable to choose WriterTo over ReaderFrom, since a WriterTo can issue one large write,
-// while the ReaderFrom must read until EOF, potentially allocating when running out of buffer.
-// Make sure that we choose WriterTo when both are implemented.
-func TestCopyPriority(t *testing.T) {
- rb := new(writeToChecker)
- wb := new(bytes.Buffer)
- rb.WriteString("hello, world.")
- Copy(wb, rb)
- if wb.String() != "hello, world." {
- t.Errorf("Copy did not work properly")
- } else if !rb.writeToCalled {
- t.Errorf("WriteTo was not prioritized over ReadFrom")
- }
-}
-
-func TestCopyN(t *testing.T) {
- rb := new(Buffer)
- wb := new(Buffer)
- rb.WriteString("hello, world.")
- CopyN(wb, rb, 5)
- if wb.String() != "hello" {
- t.Errorf("CopyN did not work properly")
- }
-}
-
-func TestCopyNReadFrom(t *testing.T) {
- rb := new(Buffer)
- wb := new(bytes.Buffer) // implements ReadFrom.
- rb.WriteString("hello")
- CopyN(wb, rb, 5)
- if wb.String() != "hello" {
- t.Errorf("CopyN did not work properly")
- }
-}
-
-func TestCopyNWriteTo(t *testing.T) {
- rb := new(bytes.Buffer) // implements WriteTo.
- wb := new(Buffer)
- rb.WriteString("hello, world.")
- CopyN(wb, rb, 5)
- if wb.String() != "hello" {
- t.Errorf("CopyN did not work properly")
- }
-}
-
-type noReadFrom struct {
- w Writer
-}
-
-func (w *noReadFrom) Write(p []byte) (n int, err error) {
- return w.w.Write(p)
-}
-
-type wantedAndErrReader struct{}
-
-func (wantedAndErrReader) Read(p []byte) (int, error) {
- return len(p), errors.New("wantedAndErrReader error")
-}
-
-func TestCopyNEOF(t *testing.T) {
- // Test that EOF behavior is the same regardless of whether
- // argument to CopyN has ReadFrom.
-
- b := new(bytes.Buffer)
-
- n, err := CopyN(&noReadFrom{b}, strings.NewReader("foo"), 3)
- if n != 3 || err != nil {
- t.Errorf("CopyN(noReadFrom, foo, 3) = %d, %v; want 3, nil", n, err)
- }
-
- n, err = CopyN(&noReadFrom{b}, strings.NewReader("foo"), 4)
- if n != 3 || err != EOF {
- t.Errorf("CopyN(noReadFrom, foo, 4) = %d, %v; want 3, EOF", n, err)
- }
-
- n, err = CopyN(b, strings.NewReader("foo"), 3) // b has read from
- if n != 3 || err != nil {
- t.Errorf("CopyN(bytes.Buffer, foo, 3) = %d, %v; want 3, nil", n, err)
- }
-
- n, err = CopyN(b, strings.NewReader("foo"), 4) // b has read from
- if n != 3 || err != EOF {
- t.Errorf("CopyN(bytes.Buffer, foo, 4) = %d, %v; want 3, EOF", n, err)
- }
-
- n, err = CopyN(b, wantedAndErrReader{}, 5)
- if n != 5 || err != nil {
- t.Errorf("CopyN(bytes.Buffer, wantedAndErrReader, 5) = %d, %v; want 5, nil", n, err)
- }
-
- n, err = CopyN(&noReadFrom{b}, wantedAndErrReader{}, 5)
- if n != 5 || err != nil {
- t.Errorf("CopyN(noReadFrom, wantedAndErrReader, 5) = %d, %v; want 5, nil", n, err)
- }
-}
-
-func TestReadAtLeast(t *testing.T) {
- var rb bytes.Buffer
- testReadAtLeast(t, &rb)
-}
-
-// A version of bytes.Buffer that returns n > 0, err on Read
-// when the input is exhausted.
-type dataAndErrorBuffer struct {
- err error
- bytes.Buffer
-}
-
-func (r *dataAndErrorBuffer) Read(p []byte) (n int, err error) {
- n, err = r.Buffer.Read(p)
- if n > 0 && r.Buffer.Len() == 0 && err == nil {
- err = r.err
- }
- return
-}
-
-func TestReadAtLeastWithDataAndEOF(t *testing.T) {
- var rb dataAndErrorBuffer
- rb.err = EOF
- testReadAtLeast(t, &rb)
-}
-
-func TestReadAtLeastWithDataAndError(t *testing.T) {
- var rb dataAndErrorBuffer
- rb.err = fmt.Errorf("fake error")
- testReadAtLeast(t, &rb)
-}
-
-func testReadAtLeast(t *testing.T, rb ReadWriter) {
- rb.Write([]byte("0123"))
- buf := make([]byte, 2)
- n, err := ReadAtLeast(rb, buf, 2)
- if err != nil {
- t.Error(err)
- }
- n, err = ReadAtLeast(rb, buf, 4)
- if err != ErrShortBuffer {
- t.Errorf("expected ErrShortBuffer got %v", err)
- }
- if n != 0 {
- t.Errorf("expected to have read 0 bytes, got %v", n)
- }
- n, err = ReadAtLeast(rb, buf, 1)
- if err != nil {
- t.Error(err)
- }
- if n != 2 {
- t.Errorf("expected to have read 2 bytes, got %v", n)
- }
- n, err = ReadAtLeast(rb, buf, 2)
- if err != EOF {
- t.Errorf("expected EOF, got %v", err)
- }
- if n != 0 {
- t.Errorf("expected to have read 0 bytes, got %v", n)
- }
- rb.Write([]byte("4"))
- n, err = ReadAtLeast(rb, buf, 2)
- want := ErrUnexpectedEOF
- if rb, ok := rb.(*dataAndErrorBuffer); ok && rb.err != EOF {
- want = rb.err
- }
- if err != want {
- t.Errorf("expected %v, got %v", want, err)
- }
- if n != 1 {
- t.Errorf("expected to have read 1 bytes, got %v", n)
- }
-}
-
-func TestTeeReader(t *testing.T) {
- src := []byte("hello, world")
- dst := make([]byte, len(src))
- rb := bytes.NewBuffer(src)
- wb := new(bytes.Buffer)
- r := TeeReader(rb, wb)
- if n, err := ReadFull(r, dst); err != nil || n != len(src) {
- t.Fatalf("ReadFull(r, dst) = %d, %v; want %d, nil", n, err, len(src))
- }
- if !bytes.Equal(dst, src) {
- t.Errorf("bytes read = %q want %q", dst, src)
- }
- if !bytes.Equal(wb.Bytes(), src) {
- t.Errorf("bytes written = %q want %q", wb.Bytes(), src)
- }
- if n, err := r.Read(dst); n != 0 || err != EOF {
- t.Errorf("r.Read at EOF = %d, %v want 0, EOF", n, err)
- }
- rb = bytes.NewBuffer(src)
- pr, pw := Pipe()
- pr.Close()
- r = TeeReader(rb, pw)
- if n, err := ReadFull(r, dst); n != 0 || err != ErrClosedPipe {
- t.Errorf("closed tee: ReadFull(r, dst) = %d, %v; want 0, EPIPE", n, err)
- }
-}
-
-func TestSectionReader_ReadAt(t *testing.T) {
- dat := "a long sample data, 1234567890"
- tests := []struct {
- data string
- off int
- n int
- bufLen int
- at int
- exp string
- err error
- }{
- {data: "", off: 0, n: 10, bufLen: 2, at: 0, exp: "", err: EOF},
- {data: dat, off: 0, n: len(dat), bufLen: 0, at: 0, exp: "", err: nil},
- {data: dat, off: len(dat), n: 1, bufLen: 1, at: 0, exp: "", err: EOF},
- {data: dat, off: 0, n: len(dat) + 2, bufLen: len(dat), at: 0, exp: dat, err: nil},
- {data: dat, off: 0, n: len(dat), bufLen: len(dat) / 2, at: 0, exp: dat[:len(dat)/2], err: nil},
- {data: dat, off: 0, n: len(dat), bufLen: len(dat), at: 0, exp: dat, err: nil},
- {data: dat, off: 0, n: len(dat), bufLen: len(dat) / 2, at: 2, exp: dat[2 : 2+len(dat)/2], err: nil},
- {data: dat, off: 3, n: len(dat), bufLen: len(dat) / 2, at: 2, exp: dat[5 : 5+len(dat)/2], err: nil},
- {data: dat, off: 3, n: len(dat) / 2, bufLen: len(dat)/2 - 2, at: 2, exp: dat[5 : 5+len(dat)/2-2], err: nil},
- {data: dat, off: 3, n: len(dat) / 2, bufLen: len(dat)/2 + 2, at: 2, exp: dat[5 : 5+len(dat)/2-2], err: EOF},
- {data: dat, off: 0, n: 0, bufLen: 0, at: -1, exp: "", err: EOF},
- {data: dat, off: 0, n: 0, bufLen: 0, at: 1, exp: "", err: EOF},
- }
- for i, tt := range tests {
- r := strings.NewReader(tt.data)
- s := NewSectionReader(r, int64(tt.off), int64(tt.n))
- buf := make([]byte, tt.bufLen)
- if n, err := s.ReadAt(buf, int64(tt.at)); n != len(tt.exp) || string(buf[:n]) != tt.exp || err != tt.err {
- t.Fatalf("%d: ReadAt(%d) = %q, %v; expected %q, %v", i, tt.at, buf[:n], err, tt.exp, tt.err)
- }
- }
-}
-
-func TestSectionReader_Seek(t *testing.T) {
- // Verifies that NewSectionReader's Seeker behaves like bytes.NewReader (which is like strings.NewReader)
- br := bytes.NewReader([]byte("foo"))
- sr := NewSectionReader(br, 0, int64(len("foo")))
-
- for whence := 0; whence <= 2; whence++ {
- for offset := int64(-3); offset <= 4; offset++ {
- brOff, brErr := br.Seek(offset, whence)
- srOff, srErr := sr.Seek(offset, whence)
- if (brErr != nil) != (srErr != nil) || brOff != srOff {
- t.Errorf("For whence %d, offset %d: bytes.Reader.Seek = (%v, %v) != SectionReader.Seek = (%v, %v)",
- whence, offset, brOff, brErr, srErr, srOff)
- }
- }
- }
-
- // And verify we can just seek past the end and get an EOF
- got, err := sr.Seek(100, 0)
- if err != nil || got != 100 {
- t.Errorf("Seek = %v, %v; want 100, nil", got, err)
- }
-
- n, err := sr.Read(make([]byte, 10))
- if n != 0 || err != EOF {
- t.Errorf("Read = %v, %v; want 0, EOF", n, err)
- }
-}
-
-func TestSectionReader_Size(t *testing.T) {
- tests := []struct {
- data string
- want int64
- }{
- {"a long sample data, 1234567890", 30},
- {"", 0},
- }
-
- for _, tt := range tests {
- r := strings.NewReader(tt.data)
- sr := NewSectionReader(r, 0, int64(len(tt.data)))
- if got := sr.Size(); got != tt.want {
- t.Errorf("Size = %v; want %v", got, tt.want)
- }
- }
-}
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