зеркало из https://github.com/microsoft/docker.git
76 строки
1.3 KiB
Go
76 строки
1.3 KiB
Go
package ioutils
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import (
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"bytes"
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"testing"
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)
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func TestFixedBufferWrite(t *testing.T) {
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buf := &fixedBuffer{buf: make([]byte, 0, 64)}
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n, err := buf.Write([]byte("hello"))
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if err != nil {
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t.Fatal(err)
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}
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if n != 5 {
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t.Fatalf("expected 5 bytes written, got %d", n)
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}
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if string(buf.buf[:5]) != "hello" {
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t.Fatalf("expected \"hello\", got %q", string(buf.buf[:5]))
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}
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n, err = buf.Write(bytes.Repeat([]byte{1}, 64))
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if err != errBufferFull {
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t.Fatalf("expected errBufferFull, got %v - %v", err, buf.buf[:64])
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}
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}
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func TestFixedBufferRead(t *testing.T) {
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buf := &fixedBuffer{buf: make([]byte, 0, 64)}
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if _, err := buf.Write([]byte("hello world")); err != nil {
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t.Fatal(err)
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}
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b := make([]byte, 5)
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n, err := buf.Read(b)
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if err != nil {
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t.Fatal(err)
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}
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if n != 5 {
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t.Fatalf("expected 5 bytes read, got %d - %s", n, buf.String())
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}
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if string(b) != "hello" {
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t.Fatalf("expected \"hello\", got %q", string(b))
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}
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n, err = buf.Read(b)
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if err != nil {
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t.Fatal(err)
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}
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if n != 5 {
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t.Fatalf("expected 5 bytes read, got %d", n)
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}
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if string(b) != " worl" {
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t.Fatalf("expected \" worl\", got %s", string(b))
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}
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b = b[:1]
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n, err = buf.Read(b)
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if err != nil {
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t.Fatal(err)
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}
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if n != 1 {
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t.Fatalf("expected 1 byte read, got %d - %s", n, buf.String())
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}
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if string(b) != "d" {
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t.Fatalf("expected \"d\", got %s", string(b))
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}
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}
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