diff options
Diffstat (limited to 'src/pkg/bufio/bufio_test.go')
-rw-r--r-- | src/pkg/bufio/bufio_test.go | 134 |
1 files changed, 130 insertions, 4 deletions
diff --git a/src/pkg/bufio/bufio_test.go b/src/pkg/bufio/bufio_test.go index 059ca6dd2..123adac29 100644 --- a/src/pkg/bufio/bufio_test.go +++ b/src/pkg/bufio/bufio_test.go @@ -2,12 +2,14 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -package bufio +package bufio_test import ( + . "bufio" "bytes" "fmt" "io" + "io/ioutil" "os" "strings" "testing" @@ -502,9 +504,8 @@ func TestWriteString(t *testing.T) { b.WriteString("7890") // easy after flush b.WriteString("abcdefghijklmnopqrstuvwxy") // hard b.WriteString("z") - b.Flush() - if b.err != nil { - t.Error("WriteString", b.err) + if err := b.Flush(); err != nil { + t.Error("WriteString", err) } s := "01234567890abcdefghijklmnopqrstuvwxyz" if string(buf.Bytes()) != s { @@ -570,3 +571,128 @@ func TestPeekThenUnreadRune(t *testing.T) { r.UnreadRune() r.ReadRune() // Used to panic here } + +var testOutput = []byte("0123456789abcdefghijklmnopqrstuvwxy") +var testInput = []byte("012\n345\n678\n9ab\ncde\nfgh\nijk\nlmn\nopq\nrst\nuvw\nxy") +var testInputrn = []byte("012\r\n345\r\n678\r\n9ab\r\ncde\r\nfgh\r\nijk\r\nlmn\r\nopq\r\nrst\r\nuvw\r\nxy\r\n\n\r\n") + +// TestReader wraps a []byte and returns reads of a specific length. +type testReader struct { + data []byte + stride int +} + +func (t *testReader) Read(buf []byte) (n int, err os.Error) { + n = t.stride + if n > len(t.data) { + n = len(t.data) + } + if n > len(buf) { + n = len(buf) + } + copy(buf, t.data) + t.data = t.data[n:] + if len(t.data) == 0 { + err = os.EOF + } + return +} + +func testReadLine(t *testing.T, input []byte) { + //for stride := 1; stride < len(input); stride++ { + for stride := 1; stride < 2; stride++ { + done := 0 + reader := testReader{input, stride} + l, _ := NewReaderSize(&reader, len(input)+1) + for { + line, isPrefix, err := l.ReadLine() + if len(line) > 0 && err != nil { + t.Errorf("ReadLine returned both data and error: %s", err) + } + if isPrefix { + t.Errorf("ReadLine returned prefix") + } + if err != nil { + if err != os.EOF { + t.Fatalf("Got unknown error: %s", err) + } + break + } + if want := testOutput[done : done+len(line)]; !bytes.Equal(want, line) { + t.Errorf("Bad line at stride %d: want: %x got: %x", stride, want, line) + } + done += len(line) + } + if done != len(testOutput) { + t.Errorf("ReadLine didn't return everything: got: %d, want: %d (stride: %d)", done, len(testOutput), stride) + } + } +} + +func TestReadLine(t *testing.T) { + testReadLine(t, testInput) + testReadLine(t, testInputrn) +} + +func TestLineTooLong(t *testing.T) { + buf := bytes.NewBuffer([]byte("aaabbbcc\n")) + l, _ := NewReaderSize(buf, 3) + line, isPrefix, err := l.ReadLine() + if !isPrefix || !bytes.Equal(line, []byte("aaa")) || err != nil { + t.Errorf("bad result for first line: %x %s", line, err) + } + line, isPrefix, err = l.ReadLine() + if !isPrefix || !bytes.Equal(line, []byte("bbb")) || err != nil { + t.Errorf("bad result for second line: %x", line) + } + line, isPrefix, err = l.ReadLine() + if isPrefix || !bytes.Equal(line, []byte("cc")) || err != nil { + t.Errorf("bad result for third line: %x", line) + } + line, isPrefix, err = l.ReadLine() + if isPrefix || err == nil { + t.Errorf("expected no more lines: %x %s", line, err) + } +} + +func TestReadAfterLines(t *testing.T) { + line1 := "line1" + restData := "line2\nline 3\n" + inbuf := bytes.NewBuffer([]byte(line1 + "\n" + restData)) + outbuf := new(bytes.Buffer) + maxLineLength := len(line1) + len(restData)/2 + l, _ := NewReaderSize(inbuf, maxLineLength) + line, isPrefix, err := l.ReadLine() + if isPrefix || err != nil || string(line) != line1 { + t.Errorf("bad result for first line: isPrefix=%v err=%v line=%q", isPrefix, err, string(line)) + } + n, err := io.Copy(outbuf, l) + if int(n) != len(restData) || err != nil { + t.Errorf("bad result for Read: n=%d err=%v", n, err) + } + if outbuf.String() != restData { + t.Errorf("bad result for Read: got %q; expected %q", outbuf.String(), restData) + } +} + +func TestReadEmptyBuffer(t *testing.T) { + l, _ := NewReaderSize(bytes.NewBuffer(nil), 10) + line, isPrefix, err := l.ReadLine() + if err != os.EOF { + t.Errorf("expected EOF from ReadLine, got '%s' %t %s", line, isPrefix, err) + } +} + +func TestLinesAfterRead(t *testing.T) { + l, _ := NewReaderSize(bytes.NewBuffer([]byte("foo")), 10) + _, err := ioutil.ReadAll(l) + if err != nil { + t.Error(err) + return + } + + line, isPrefix, err := l.ReadLine() + if err != os.EOF { + t.Errorf("expected EOF from ReadLine, got '%s' %t %s", line, isPrefix, err) + } +} |