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Diffstat (limited to 'src/pkg/bufio/scan_test.go')
-rw-r--r--src/pkg/bufio/scan_test.go406
1 files changed, 0 insertions, 406 deletions
diff --git a/src/pkg/bufio/scan_test.go b/src/pkg/bufio/scan_test.go
deleted file mode 100644
index 0db7cad20..000000000
--- a/src/pkg/bufio/scan_test.go
+++ /dev/null
@@ -1,406 +0,0 @@
-// Copyright 2013 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 bufio_test
-
-import (
- . "bufio"
- "bytes"
- "errors"
- "io"
- "strings"
- "testing"
- "unicode"
- "unicode/utf8"
-)
-
-// Test white space table matches the Unicode definition.
-func TestSpace(t *testing.T) {
- for r := rune(0); r <= utf8.MaxRune; r++ {
- if IsSpace(r) != unicode.IsSpace(r) {
- t.Fatalf("white space property disagrees: %#U should be %t", r, unicode.IsSpace(r))
- }
- }
-}
-
-var scanTests = []string{
- "",
- "a",
- "¼",
- "☹",
- "\x81", // UTF-8 error
- "\uFFFD", // correctly encoded RuneError
- "abcdefgh",
- "abc def\n\t\tgh ",
- "abc¼☹\x81\uFFFD日本語\x82abc",
-}
-
-func TestScanByte(t *testing.T) {
- for n, test := range scanTests {
- buf := strings.NewReader(test)
- s := NewScanner(buf)
- s.Split(ScanBytes)
- var i int
- for i = 0; s.Scan(); i++ {
- if b := s.Bytes(); len(b) != 1 || b[0] != test[i] {
- t.Errorf("#%d: %d: expected %q got %q", n, i, test, b)
- }
- }
- if i != len(test) {
- t.Errorf("#%d: termination expected at %d; got %d", n, len(test), i)
- }
- err := s.Err()
- if err != nil {
- t.Errorf("#%d: %v", n, err)
- }
- }
-}
-
-// Test that the rune splitter returns same sequence of runes (not bytes) as for range string.
-func TestScanRune(t *testing.T) {
- for n, test := range scanTests {
- buf := strings.NewReader(test)
- s := NewScanner(buf)
- s.Split(ScanRunes)
- var i, runeCount int
- var expect rune
- // Use a string range loop to validate the sequence of runes.
- for i, expect = range string(test) {
- if !s.Scan() {
- break
- }
- runeCount++
- got, _ := utf8.DecodeRune(s.Bytes())
- if got != expect {
- t.Errorf("#%d: %d: expected %q got %q", n, i, expect, got)
- }
- }
- if s.Scan() {
- t.Errorf("#%d: scan ran too long, got %q", n, s.Text())
- }
- testRuneCount := utf8.RuneCountInString(test)
- if runeCount != testRuneCount {
- t.Errorf("#%d: termination expected at %d; got %d", n, testRuneCount, runeCount)
- }
- err := s.Err()
- if err != nil {
- t.Errorf("#%d: %v", n, err)
- }
- }
-}
-
-var wordScanTests = []string{
- "",
- " ",
- "\n",
- "a",
- " a ",
- "abc def",
- " abc def ",
- " abc\tdef\nghi\rjkl\fmno\vpqr\u0085stu\u00a0\n",
-}
-
-// Test that the word splitter returns the same data as strings.Fields.
-func TestScanWords(t *testing.T) {
- for n, test := range wordScanTests {
- buf := strings.NewReader(test)
- s := NewScanner(buf)
- s.Split(ScanWords)
- words := strings.Fields(test)
- var wordCount int
- for wordCount = 0; wordCount < len(words); wordCount++ {
- if !s.Scan() {
- break
- }
- got := s.Text()
- if got != words[wordCount] {
- t.Errorf("#%d: %d: expected %q got %q", n, wordCount, words[wordCount], got)
- }
- }
- if s.Scan() {
- t.Errorf("#%d: scan ran too long, got %q", n, s.Text())
- }
- if wordCount != len(words) {
- t.Errorf("#%d: termination expected at %d; got %d", n, len(words), wordCount)
- }
- err := s.Err()
- if err != nil {
- t.Errorf("#%d: %v", n, err)
- }
- }
-}
-
-// slowReader is a reader that returns only a few bytes at a time, to test the incremental
-// reads in Scanner.Scan.
-type slowReader struct {
- max int
- buf io.Reader
-}
-
-func (sr *slowReader) Read(p []byte) (n int, err error) {
- if len(p) > sr.max {
- p = p[0:sr.max]
- }
- return sr.buf.Read(p)
-}
-
-// genLine writes to buf a predictable but non-trivial line of text of length
-// n, including the terminal newline and an occasional carriage return.
-// If addNewline is false, the \r and \n are not emitted.
-func genLine(buf *bytes.Buffer, lineNum, n int, addNewline bool) {
- buf.Reset()
- doCR := lineNum%5 == 0
- if doCR {
- n--
- }
- for i := 0; i < n-1; i++ { // Stop early for \n.
- c := 'a' + byte(lineNum+i)
- if c == '\n' || c == '\r' { // Don't confuse us.
- c = 'N'
- }
- buf.WriteByte(c)
- }
- if addNewline {
- if doCR {
- buf.WriteByte('\r')
- }
- buf.WriteByte('\n')
- }
- return
-}
-
-// Test the line splitter, including some carriage returns but no long lines.
-func TestScanLongLines(t *testing.T) {
- const smallMaxTokenSize = 256 // Much smaller for more efficient testing.
- // Build a buffer of lots of line lengths up to but not exceeding smallMaxTokenSize.
- tmp := new(bytes.Buffer)
- buf := new(bytes.Buffer)
- lineNum := 0
- j := 0
- for i := 0; i < 2*smallMaxTokenSize; i++ {
- genLine(tmp, lineNum, j, true)
- if j < smallMaxTokenSize {
- j++
- } else {
- j--
- }
- buf.Write(tmp.Bytes())
- lineNum++
- }
- s := NewScanner(&slowReader{1, buf})
- s.Split(ScanLines)
- s.MaxTokenSize(smallMaxTokenSize)
- j = 0
- for lineNum := 0; s.Scan(); lineNum++ {
- genLine(tmp, lineNum, j, false)
- if j < smallMaxTokenSize {
- j++
- } else {
- j--
- }
- line := tmp.String() // We use the string-valued token here, for variety.
- if s.Text() != line {
- t.Errorf("%d: bad line: %d %d\n%.100q\n%.100q\n", lineNum, len(s.Bytes()), len(line), s.Text(), line)
- }
- }
- err := s.Err()
- if err != nil {
- t.Fatal(err)
- }
-}
-
-// Test that the line splitter errors out on a long line.
-func TestScanLineTooLong(t *testing.T) {
- const smallMaxTokenSize = 256 // Much smaller for more efficient testing.
- // Build a buffer of lots of line lengths up to but not exceeding smallMaxTokenSize.
- tmp := new(bytes.Buffer)
- buf := new(bytes.Buffer)
- lineNum := 0
- j := 0
- for i := 0; i < 2*smallMaxTokenSize; i++ {
- genLine(tmp, lineNum, j, true)
- j++
- buf.Write(tmp.Bytes())
- lineNum++
- }
- s := NewScanner(&slowReader{3, buf})
- s.Split(ScanLines)
- s.MaxTokenSize(smallMaxTokenSize)
- j = 0
- for lineNum := 0; s.Scan(); lineNum++ {
- genLine(tmp, lineNum, j, false)
- if j < smallMaxTokenSize {
- j++
- } else {
- j--
- }
- line := tmp.Bytes()
- if !bytes.Equal(s.Bytes(), line) {
- t.Errorf("%d: bad line: %d %d\n%.100q\n%.100q\n", lineNum, len(s.Bytes()), len(line), s.Bytes(), line)
- }
- }
- err := s.Err()
- if err != ErrTooLong {
- t.Fatalf("expected ErrTooLong; got %s", err)
- }
-}
-
-// Test that the line splitter handles a final line without a newline.
-func testNoNewline(text string, lines []string, t *testing.T) {
- buf := strings.NewReader(text)
- s := NewScanner(&slowReader{7, buf})
- s.Split(ScanLines)
- for lineNum := 0; s.Scan(); lineNum++ {
- line := lines[lineNum]
- if s.Text() != line {
- t.Errorf("%d: bad line: %d %d\n%.100q\n%.100q\n", lineNum, len(s.Bytes()), len(line), s.Bytes(), line)
- }
- }
- err := s.Err()
- if err != nil {
- t.Fatal(err)
- }
-}
-
-var noNewlineLines = []string{
- "abcdefghijklmn\nopqrstuvwxyz",
-}
-
-// Test that the line splitter handles a final line without a newline.
-func TestScanLineNoNewline(t *testing.T) {
- const text = "abcdefghijklmn\nopqrstuvwxyz"
- lines := []string{
- "abcdefghijklmn",
- "opqrstuvwxyz",
- }
- testNoNewline(text, lines, t)
-}
-
-// Test that the line splitter handles a final line with a carriage return but no newline.
-func TestScanLineReturnButNoNewline(t *testing.T) {
- const text = "abcdefghijklmn\nopqrstuvwxyz\r"
- lines := []string{
- "abcdefghijklmn",
- "opqrstuvwxyz",
- }
- testNoNewline(text, lines, t)
-}
-
-// Test that the line splitter handles a final empty line.
-func TestScanLineEmptyFinalLine(t *testing.T) {
- const text = "abcdefghijklmn\nopqrstuvwxyz\n\n"
- lines := []string{
- "abcdefghijklmn",
- "opqrstuvwxyz",
- "",
- }
- testNoNewline(text, lines, t)
-}
-
-// Test that the line splitter handles a final empty line with a carriage return but no newline.
-func TestScanLineEmptyFinalLineWithCR(t *testing.T) {
- const text = "abcdefghijklmn\nopqrstuvwxyz\n\r"
- lines := []string{
- "abcdefghijklmn",
- "opqrstuvwxyz",
- "",
- }
- testNoNewline(text, lines, t)
-}
-
-var testError = errors.New("testError")
-
-// Test the correct error is returned when the split function errors out.
-func TestSplitError(t *testing.T) {
- // Create a split function that delivers a little data, then a predictable error.
- numSplits := 0
- const okCount = 7
- errorSplit := func(data []byte, atEOF bool) (advance int, token []byte, err error) {
- if atEOF {
- panic("didn't get enough data")
- }
- if numSplits >= okCount {
- return 0, nil, testError
- }
- numSplits++
- return 1, data[0:1], nil
- }
- // Read the data.
- const text = "abcdefghijklmnopqrstuvwxyz"
- buf := strings.NewReader(text)
- s := NewScanner(&slowReader{1, buf})
- s.Split(errorSplit)
- var i int
- for i = 0; s.Scan(); i++ {
- if len(s.Bytes()) != 1 || text[i] != s.Bytes()[0] {
- t.Errorf("#%d: expected %q got %q", i, text[i], s.Bytes()[0])
- }
- }
- // Check correct termination location and error.
- if i != okCount {
- t.Errorf("unexpected termination; expected %d tokens got %d", okCount, i)
- }
- err := s.Err()
- if err != testError {
- t.Fatalf("expected %q got %v", testError, err)
- }
-}
-
-// Test that an EOF is overridden by a user-generated scan error.
-func TestErrAtEOF(t *testing.T) {
- s := NewScanner(strings.NewReader("1 2 33"))
- // This spitter will fail on last entry, after s.err==EOF.
- split := func(data []byte, atEOF bool) (advance int, token []byte, err error) {
- advance, token, err = ScanWords(data, atEOF)
- if len(token) > 1 {
- if s.ErrOrEOF() != io.EOF {
- t.Fatal("not testing EOF")
- }
- err = testError
- }
- return
- }
- s.Split(split)
- for s.Scan() {
- }
- if s.Err() != testError {
- t.Fatal("wrong error:", s.Err())
- }
-}
-
-// Test for issue 5268.
-type alwaysError struct{}
-
-func (alwaysError) Read(p []byte) (int, error) {
- return 0, io.ErrUnexpectedEOF
-}
-
-func TestNonEOFWithEmptyRead(t *testing.T) {
- scanner := NewScanner(alwaysError{})
- for scanner.Scan() {
- t.Fatal("read should fail")
- }
- err := scanner.Err()
- if err != io.ErrUnexpectedEOF {
- t.Errorf("unexpected error: %v", err)
- }
-}
-
-// Test that Scan finishes if we have endless empty reads.
-type endlessZeros struct{}
-
-func (endlessZeros) Read(p []byte) (int, error) {
- return 0, nil
-}
-
-func TestBadReader(t *testing.T) {
- scanner := NewScanner(endlessZeros{})
- for scanner.Scan() {
- t.Fatal("read should fail")
- }
- err := scanner.Err()
- if err != io.ErrNoProgress {
- t.Errorf("unexpected error: %v", err)
- }
-}