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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgo/] [go/] [io/] [pipe_test.go] - Blame information for rev 756

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// 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 (
        "fmt"
        . "io"
        "testing"
        "time"
)
 
func checkWrite(t *testing.T, w Writer, data []byte, c chan int) {
        n, err := w.Write(data)
        if err != nil {
                t.Errorf("write: %v", err)
        }
        if n != len(data) {
                t.Errorf("short write: %d != %d", n, len(data))
        }
        c <- 0
}
 
// Test a single read/write pair.
func TestPipe1(t *testing.T) {
        c := make(chan int)
        r, w := Pipe()
        var buf = make([]byte, 64)
        go checkWrite(t, w, []byte("hello, world"), c)
        n, err := r.Read(buf)
        if err != nil {
                t.Errorf("read: %v", err)
        } else if n != 12 || string(buf[0:12]) != "hello, world" {
                t.Errorf("bad read: got %q", buf[0:n])
        }
        <-c
        r.Close()
        w.Close()
}
 
func reader(t *testing.T, r Reader, c chan int) {
        var buf = make([]byte, 64)
        for {
                n, err := r.Read(buf)
                if err == EOF {
                        c <- 0
                        break
                }
                if err != nil {
                        t.Errorf("read: %v", err)
                }
                c <- n
        }
}
 
// Test a sequence of read/write pairs.
func TestPipe2(t *testing.T) {
        c := make(chan int)
        r, w := Pipe()
        go reader(t, r, c)
        var buf = make([]byte, 64)
        for i := 0; i < 5; i++ {
                p := buf[0 : 5+i*10]
                n, err := w.Write(p)
                if n != len(p) {
                        t.Errorf("wrote %d, got %d", len(p), n)
                }
                if err != nil {
                        t.Errorf("write: %v", err)
                }
                nn := <-c
                if nn != n {
                        t.Errorf("wrote %d, read got %d", n, nn)
                }
        }
        w.Close()
        nn := <-c
        if nn != 0 {
                t.Errorf("final read got %d", nn)
        }
}
 
type pipeReturn struct {
        n   int
        err error
}
 
// Test a large write that requires multiple reads to satisfy.
func writer(w WriteCloser, buf []byte, c chan pipeReturn) {
        n, err := w.Write(buf)
        w.Close()
        c <- pipeReturn{n, err}
}
 
func TestPipe3(t *testing.T) {
        c := make(chan pipeReturn)
        r, w := Pipe()
        var wdat = make([]byte, 128)
        for i := 0; i < len(wdat); i++ {
                wdat[i] = byte(i)
        }
        go writer(w, wdat, c)
        var rdat = make([]byte, 1024)
        tot := 0
        for n := 1; n <= 256; n *= 2 {
                nn, err := r.Read(rdat[tot : tot+n])
                if err != nil && err != EOF {
                        t.Fatalf("read: %v", err)
                }
 
                // only final two reads should be short - 1 byte, then 0
                expect := n
                if n == 128 {
                        expect = 1
                } else if n == 256 {
                        expect = 0
                        if err != EOF {
                                t.Fatalf("read at end: %v", err)
                        }
                }
                if nn != expect {
                        t.Fatalf("read %d, expected %d, got %d", n, expect, nn)
                }
                tot += nn
        }
        pr := <-c
        if pr.n != 128 || pr.err != nil {
                t.Fatalf("write 128: %d, %v", pr.n, pr.err)
        }
        if tot != 128 {
                t.Fatalf("total read %d != 128", tot)
        }
        for i := 0; i < 128; i++ {
                if rdat[i] != byte(i) {
                        t.Fatalf("rdat[%d] = %d", i, rdat[i])
                }
        }
}
 
// Test read after/before writer close.
 
type closer interface {
        CloseWithError(error) error
        Close() error
}
 
type pipeTest struct {
        async          bool
        err            error
        closeWithError bool
}
 
func (p pipeTest) String() string {
        return fmt.Sprintf("async=%v err=%v closeWithError=%v", p.async, p.err, p.closeWithError)
}
 
var pipeTests = []pipeTest{
        {true, nil, false},
        {true, nil, true},
        {true, ErrShortWrite, true},
        {false, nil, false},
        {false, nil, true},
        {false, ErrShortWrite, true},
}
 
func delayClose(t *testing.T, cl closer, ch chan int, tt pipeTest) {
        time.Sleep(1 * time.Millisecond)
        var err error
        if tt.closeWithError {
                err = cl.CloseWithError(tt.err)
        } else {
                err = cl.Close()
        }
        if err != nil {
                t.Errorf("delayClose: %v", err)
        }
        ch <- 0
}
 
func TestPipeReadClose(t *testing.T) {
        for _, tt := range pipeTests {
                c := make(chan int, 1)
                r, w := Pipe()
                if tt.async {
                        go delayClose(t, w, c, tt)
                } else {
                        delayClose(t, w, c, tt)
                }
                var buf = make([]byte, 64)
                n, err := r.Read(buf)
                <-c
                want := tt.err
                if want == nil {
                        want = EOF
                }
                if err != want {
                        t.Errorf("read from closed pipe: %v want %v", err, want)
                }
                if n != 0 {
                        t.Errorf("read on closed pipe returned %d", n)
                }
                if err = r.Close(); err != nil {
                        t.Errorf("r.Close: %v", err)
                }
        }
}
 
// Test close on Read side during Read.
func TestPipeReadClose2(t *testing.T) {
        c := make(chan int, 1)
        r, _ := Pipe()
        go delayClose(t, r, c, pipeTest{})
        n, err := r.Read(make([]byte, 64))
        <-c
        if n != 0 || err != ErrClosedPipe {
                t.Errorf("read from closed pipe: %v, %v want %v, %v", n, err, 0, ErrClosedPipe)
        }
}
 
// Test write after/before reader close.
 
func TestPipeWriteClose(t *testing.T) {
        for _, tt := range pipeTests {
                c := make(chan int, 1)
                r, w := Pipe()
                if tt.async {
                        go delayClose(t, r, c, tt)
                } else {
                        delayClose(t, r, c, tt)
                }
                n, err := WriteString(w, "hello, world")
                <-c
                expect := tt.err
                if expect == nil {
                        expect = ErrClosedPipe
                }
                if err != expect {
                        t.Errorf("write on closed pipe: %v want %v", err, expect)
                }
                if n != 0 {
                        t.Errorf("write on closed pipe returned %d", n)
                }
                if err = w.Close(); err != nil {
                        t.Errorf("w.Close: %v", err)
                }
        }
}
 
func TestWriteEmpty(t *testing.T) {
        r, w := Pipe()
        go func() {
                w.Write([]byte{})
                w.Close()
        }()
        var b [2]byte
        ReadFull(r, b[0:2])
        r.Close()
}
 
func TestWriteNil(t *testing.T) {
        r, w := Pipe()
        go func() {
                w.Write(nil)
                w.Close()
        }()
        var b [2]byte
        ReadFull(r, b[0:2])
        r.Close()
}

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Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgo/] [go/] [io/] [pipe_test.go] - Blame information for rev 756

Line No.	Rev	Author	Line
1	747	jeremybenn	`// Copyright 2009 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 io_test`
6
7			`import (`
8			`"fmt"`
9			`. "io"`
10			`"testing"`
11			`"time"`
12			`)`
13
14			`func checkWrite(t *testing.T, w Writer, data []byte, c chan int) {`
15			`n, err := w.Write(data)`
16			`if err != nil {`
17			`t.Errorf("write: %v", err)`
18			`}`
19			`if n != len(data) {`
20			`t.Errorf("short write: %d != %d", n, len(data))`
21			`}`
22			`c <- 0`
23			`}`
24
25			`// Test a single read/write pair.`
26			`func TestPipe1(t *testing.T) {`
27			`c := make(chan int)`
28			`r, w := Pipe()`
29			`var buf = make([]byte, 64)`
30			`go checkWrite(t, w, []byte("hello, world"), c)`
31			`n, err := r.Read(buf)`
32			`if err != nil {`
33			`t.Errorf("read: %v", err)`
34			`} else if n != 12 \|\| string(buf[0:12]) != "hello, world" {`
35			`t.Errorf("bad read: got %q", buf[0:n])`
36			`}`
37			`<-c`
38			`r.Close()`
39			`w.Close()`
40			`}`
41
42			`func reader(t *testing.T, r Reader, c chan int) {`
43			`var buf = make([]byte, 64)`
44			`for {`
45			`n, err := r.Read(buf)`
46			`if err == EOF {`
47			`c <- 0`
48			`break`
49			`}`
50			`if err != nil {`
51			`t.Errorf("read: %v", err)`
52			`}`
53			`c <- n`
54			`}`
55			`}`
56
57			`// Test a sequence of read/write pairs.`
58			`func TestPipe2(t *testing.T) {`
59			`c := make(chan int)`
60			`r, w := Pipe()`
61			`go reader(t, r, c)`
62			`var buf = make([]byte, 64)`
63			`for i := 0; i < 5; i++ {`
64			`p := buf[0 : 5+i*10]`
65			`n, err := w.Write(p)`
66			`if n != len(p) {`
67			`t.Errorf("wrote %d, got %d", len(p), n)`
68			`}`
69			`if err != nil {`
70			`t.Errorf("write: %v", err)`
71			`}`
72			`nn := <-c`
73			`if nn != n {`
74			`t.Errorf("wrote %d, read got %d", n, nn)`
75			`}`
76			`}`
77			`w.Close()`
78			`nn := <-c`
79			`if nn != 0 {`
80			`t.Errorf("final read got %d", nn)`
81			`}`
82			`}`
83
84			`type pipeReturn struct {`
85			`n int`
86			`err error`
87			`}`
88
89			`// Test a large write that requires multiple reads to satisfy.`
90			`func writer(w WriteCloser, buf []byte, c chan pipeReturn) {`
91			`n, err := w.Write(buf)`
92			`w.Close()`
93			`c <- pipeReturn{n, err}`
94			`}`
95
96			`func TestPipe3(t *testing.T) {`
97			`c := make(chan pipeReturn)`
98			`r, w := Pipe()`
99			`var wdat = make([]byte, 128)`
100			`for i := 0; i < len(wdat); i++ {`
101			`wdat[i] = byte(i)`
102			`}`
103			`go writer(w, wdat, c)`
104			`var rdat = make([]byte, 1024)`
105			`tot := 0`
106			`for n := 1; n <= 256; n *= 2 {`
107			`nn, err := r.Read(rdat[tot : tot+n])`
108			`if err != nil && err != EOF {`
109			`t.Fatalf("read: %v", err)`
110			`}`
111
112			`// only final two reads should be short - 1 byte, then 0`
113			`expect := n`
114			`if n == 128 {`
115			`expect = 1`
116			`} else if n == 256 {`
117			`expect = 0`
118			`if err != EOF {`
119			`t.Fatalf("read at end: %v", err)`
120			`}`
121			`}`
122			`if nn != expect {`
123			`t.Fatalf("read %d, expected %d, got %d", n, expect, nn)`
124			`}`
125			`tot += nn`
126			`}`
127			`pr := <-c`
128			`if pr.n != 128 \|\| pr.err != nil {`
129			`t.Fatalf("write 128: %d, %v", pr.n, pr.err)`
130			`}`
131			`if tot != 128 {`
132			`t.Fatalf("total read %d != 128", tot)`
133			`}`
134			`for i := 0; i < 128; i++ {`
135			`if rdat[i] != byte(i) {`
136			`t.Fatalf("rdat[%d] = %d", i, rdat[i])`
137			`}`
138			`}`
139			`}`
140
141			`// Test read after/before writer close.`
142
143			`type closer interface {`
144			`CloseWithError(error) error`
145			`Close() error`
146			`}`
147
148			`type pipeTest struct {`
149			`async bool`
150			`err error`
151			`closeWithError bool`
152			`}`
153
154			`func (p pipeTest) String() string {`
155			`return fmt.Sprintf("async=%v err=%v closeWithError=%v", p.async, p.err, p.closeWithError)`
156			`}`
157
158			`var pipeTests = []pipeTest{`
159			`{true, nil, false},`
160			`{true, nil, true},`
161			`{true, ErrShortWrite, true},`
162			`{false, nil, false},`
163			`{false, nil, true},`
164			`{false, ErrShortWrite, true},`
165			`}`
166
167			`func delayClose(t *testing.T, cl closer, ch chan int, tt pipeTest) {`
168			`time.Sleep(1 * time.Millisecond)`
169			`var err error`
170			`if tt.closeWithError {`
171			`err = cl.CloseWithError(tt.err)`
172			`} else {`
173			`err = cl.Close()`
174			`}`
175			`if err != nil {`
176			`t.Errorf("delayClose: %v", err)`
177			`}`
178			`ch <- 0`
179			`}`
180
181			`func TestPipeReadClose(t *testing.T) {`
182			`for _, tt := range pipeTests {`
183			`c := make(chan int, 1)`
184			`r, w := Pipe()`
185			`if tt.async {`
186			`go delayClose(t, w, c, tt)`
187			`} else {`
188			`delayClose(t, w, c, tt)`
189			`}`
190			`var buf = make([]byte, 64)`
191			`n, err := r.Read(buf)`
192			`<-c`
193			`want := tt.err`
194			`if want == nil {`
195			`want = EOF`
196			`}`
197			`if err != want {`
198			`t.Errorf("read from closed pipe: %v want %v", err, want)`
199			`}`
200			`if n != 0 {`
201			`t.Errorf("read on closed pipe returned %d", n)`
202			`}`
203			`if err = r.Close(); err != nil {`
204			`t.Errorf("r.Close: %v", err)`
205			`}`
206			`}`
207			`}`
208
209			`// Test close on Read side during Read.`
210			`func TestPipeReadClose2(t *testing.T) {`
211			`c := make(chan int, 1)`
212			`r, _ := Pipe()`
213			`go delayClose(t, r, c, pipeTest{})`
214			`n, err := r.Read(make([]byte, 64))`
215			`<-c`
216			`if n != 0 \|\| err != ErrClosedPipe {`
217			`t.Errorf("read from closed pipe: %v, %v want %v, %v", n, err, 0, ErrClosedPipe)`
218			`}`
219			`}`
220
221			`// Test write after/before reader close.`
222
223			`func TestPipeWriteClose(t *testing.T) {`
224			`for _, tt := range pipeTests {`
225			`c := make(chan int, 1)`
226			`r, w := Pipe()`
227			`if tt.async {`
228			`go delayClose(t, r, c, tt)`
229			`} else {`
230			`delayClose(t, r, c, tt)`
231			`}`
232			`n, err := WriteString(w, "hello, world")`
233			`<-c`
234			`expect := tt.err`
235			`if expect == nil {`
236			`expect = ErrClosedPipe`
237			`}`
238			`if err != expect {`
239			`t.Errorf("write on closed pipe: %v want %v", err, expect)`
240			`}`
241			`if n != 0 {`
242			`t.Errorf("write on closed pipe returned %d", n)`
243			`}`
244			`if err = w.Close(); err != nil {`
245			`t.Errorf("w.Close: %v", err)`
246			`}`
247			`}`
248			`}`
249
250			`func TestWriteEmpty(t *testing.T) {`
251			`r, w := Pipe()`
252			`go func() {`
253			`w.Write([]byte{})`
254			`w.Close()`
255			`}()`
256			`var b [2]byte`
257			`ReadFull(r, b[0:2])`
258			`r.Close()`
259			`}`
260
261			`func TestWriteNil(t *testing.T) {`
262			`r, w := Pipe()`
263			`go func() {`
264			`w.Write(nil)`
265			`w.Close()`
266			`}()`
267			`var b [2]byte`
268			`ReadFull(r, b[0:2])`
269			`r.Close()`
270			`}`