Golang程序
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372行
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8.77 KB
// Copyright 2011 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 csv
import (
"io"
"reflect"
"strings"
"testing"
)
var readTests = []struct {
Name string
Input string
Output [][]string
UseFieldsPerRecord bool // false (default) means FieldsPerRecord is -1
// These fields are copied into the Reader
Comma rune
Comment rune
FieldsPerRecord int
LazyQuotes bool
TrailingComma bool
TrimLeadingSpace bool
Error string
Line int // Expected error line if != 0
Column int // Expected error column if line != 0
}{
{
Name: "Simple",
Input: "a,b,c\n",
Output: [][]string{{"a", "b", "c"}},
},
{
Name: "CRLF",
Input: "a,b\r\nc,d\r\n",
Output: [][]string{{"a", "b"}, {"c", "d"}},
},
{
Name: "BareCR",
Input: "a,b\rc,d\r\n",
Output: [][]string{{"a", "b\rc", "d"}},
},
{
Name: "RFC4180test",
UseFieldsPerRecord: true,
Input: `#field1,field2,field3
"aaa","bb
b","ccc"
"a,a","b""bb","ccc"
zzz,yyy,xxx
`,
Output: [][]string{
{"#field1", "field2", "field3"},
{"aaa", "bb\nb", "ccc"},
{"a,a", `b"bb`, "ccc"},
{"zzz", "yyy", "xxx"},
},
},
{
Name: "NoEOLTest",
Input: "a,b,c",
Output: [][]string{{"a", "b", "c"}},
},
{
Name: "Semicolon",
Comma: ';',
Input: "a;b;c\n",
Output: [][]string{{"a", "b", "c"}},
},
{
Name: "MultiLine",
Input: `"two
line","one line","three
line
field"`,
Output: [][]string{{"two\nline", "one line", "three\nline\nfield"}},
},
{
Name: "BlankLine",
Input: "a,b,c\n\nd,e,f\n\n",
Output: [][]string{
{"a", "b", "c"},
{"d", "e", "f"},
},
},
{
Name: "BlankLineFieldCount",
Input: "a,b,c\n\nd,e,f\n\n",
UseFieldsPerRecord: true,
Output: [][]string{
{"a", "b", "c"},
{"d", "e", "f"},
},
},
{
Name: "TrimSpace",
Input: " a, b, c\n",
TrimLeadingSpace: true,
Output: [][]string{{"a", "b", "c"}},
},
{
Name: "LeadingSpace",
Input: " a, b, c\n",
Output: [][]string{{" a", " b", " c"}},
},
{
Name: "Comment",
Comment: '#',
Input: "#1,2,3\na,b,c\n#comment",
Output: [][]string{{"a", "b", "c"}},
},
{
Name: "NoComment",
Input: "#1,2,3\na,b,c",
Output: [][]string{{"#1", "2", "3"}, {"a", "b", "c"}},
},
{
Name: "LazyQuotes",
LazyQuotes: true,
Input: `a "word","1"2",a","b`,
Output: [][]string{{`a "word"`, `1"2`, `a"`, `b`}},
},
{
Name: "BareQuotes",
LazyQuotes: true,
Input: `a "word","1"2",a"`,
Output: [][]string{{`a "word"`, `1"2`, `a"`}},
},
{
Name: "BareDoubleQuotes",
LazyQuotes: true,
Input: `a""b,c`,
Output: [][]string{{`a""b`, `c`}},
},
{
Name: "BadDoubleQuotes",
Input: `a""b,c`,
Error: `bare " in non-quoted-field`, Line: 1, Column: 1,
},
{
Name: "TrimQuote",
Input: ` "a"," b",c`,
TrimLeadingSpace: true,
Output: [][]string{{"a", " b", "c"}},
},
{
Name: "BadBareQuote",
Input: `a "word","b"`,
Error: `bare " in non-quoted-field`, Line: 1, Column: 2,
},
{
Name: "BadTrailingQuote",
Input: `"a word",b"`,
Error: `bare " in non-quoted-field`, Line: 1, Column: 10,
},
{
Name: "ExtraneousQuote",
Input: `"a "word","b"`,
Error: `extraneous " in field`, Line: 1, Column: 3,
},
{
Name: "BadFieldCount",
UseFieldsPerRecord: true,
Input: "a,b,c\nd,e",
Error: "wrong number of fields", Line: 2,
},
{
Name: "BadFieldCount1",
UseFieldsPerRecord: true,
FieldsPerRecord: 2,
Input: `a,b,c`,
Error: "wrong number of fields", Line: 1,
},
{
Name: "FieldCount",
Input: "a,b,c\nd,e",
Output: [][]string{{"a", "b", "c"}, {"d", "e"}},
},
{
Name: "TrailingCommaEOF",
Input: "a,b,c,",
Output: [][]string{{"a", "b", "c", ""}},
},
{
Name: "TrailingCommaEOL",
Input: "a,b,c,\n",
Output: [][]string{{"a", "b", "c", ""}},
},
{
Name: "TrailingCommaSpaceEOF",
TrimLeadingSpace: true,
Input: "a,b,c, ",
Output: [][]string{{"a", "b", "c", ""}},
},
{
Name: "TrailingCommaSpaceEOL",
TrimLeadingSpace: true,
Input: "a,b,c, \n",
Output: [][]string{{"a", "b", "c", ""}},
},
{
Name: "TrailingCommaLine3",
TrimLeadingSpace: true,
Input: "a,b,c\nd,e,f\ng,hi,",
Output: [][]string{{"a", "b", "c"}, {"d", "e", "f"}, {"g", "hi", ""}},
},
{
Name: "NotTrailingComma3",
Input: "a,b,c, \n",
Output: [][]string{{"a", "b", "c", " "}},
},
{
Name: "CommaFieldTest",
TrailingComma: true,
Input: `x,y,z,w
x,y,z,
x,y,,
x,,,
,,,
"x","y","z","w"
"x","y","z",""
"x","y","",""
"x","","",""
"","","",""
`,
Output: [][]string{
{"x", "y", "z", "w"},
{"x", "y", "z", ""},
{"x", "y", "", ""},
{"x", "", "", ""},
{"", "", "", ""},
{"x", "y", "z", "w"},
{"x", "y", "z", ""},
{"x", "y", "", ""},
{"x", "", "", ""},
{"", "", "", ""},
},
},
{
Name: "TrailingCommaIneffective1",
TrailingComma: true,
TrimLeadingSpace: true,
Input: "a,b,\nc,d,e",
Output: [][]string{
{"a", "b", ""},
{"c", "d", "e"},
},
},
{
Name: "TrailingCommaIneffective2",
TrailingComma: false,
TrimLeadingSpace: true,
Input: "a,b,\nc,d,e",
Output: [][]string{
{"a", "b", ""},
{"c", "d", "e"},
},
},
}
func TestRead(t *testing.T) {
for _, tt := range readTests {
r := NewReader(strings.NewReader(tt.Input))
r.Comment = tt.Comment
if tt.UseFieldsPerRecord {
r.FieldsPerRecord = tt.FieldsPerRecord
} else {
r.FieldsPerRecord = -1
}
r.LazyQuotes = tt.LazyQuotes
r.TrailingComma = tt.TrailingComma
r.TrimLeadingSpace = tt.TrimLeadingSpace
if tt.Comma != 0 {
r.Comma = tt.Comma
}
out, err := r.ReadAll()
perr, _ := err.(*ParseError)
if tt.Error != "" {
if err == nil || !strings.Contains(err.Error(), tt.Error) {
t.Errorf("%s: error %v, want error %q", tt.Name, err, tt.Error)
} else if tt.Line != 0 && (tt.Line != perr.Line || tt.Column != perr.Column) {
t.Errorf("%s: error at %d:%d expected %d:%d", tt.Name, perr.Line, perr.Column, tt.Line, tt.Column)
}
} else if err != nil {
t.Errorf("%s: unexpected error %v", tt.Name, err)
} else if !reflect.DeepEqual(out, tt.Output) {
t.Errorf("%s: out=%q want %q", tt.Name, out, tt.Output)
}
}
}
// nTimes is an io.Reader which yields the string s n times.
type nTimes struct {
s string
n int
off int
}
func (r *nTimes) Read(p []byte) (n int, err error) {
for {
if r.n <= 0 || r.s == "" {
return n, io.EOF
}
n0 := copy(p, r.s[r.off:])
p = p[n0:]
n += n0
r.off += n0
if r.off == len(r.s) {
r.off = 0
r.n--
}
if len(p) == 0 {
return
}
}
}
// benchmarkRead measures reading the provided CSV rows data.
// initReader, if non-nil, modifies the Reader before it's used.
func benchmarkRead(b *testing.B, initReader func(*Reader), rows string) {
b.ReportAllocs()
r := NewReader(&nTimes{s: rows, n: b.N})
if initReader != nil {
initReader(r)
}
for {
_, err := r.Read()
if err == io.EOF {
break
}
if err != nil {
b.Fatal(err)
}
}
}
const benchmarkCSVData = `x,y,z,w
x,y,z,
x,y,,
x,,,
,,,
"x","y","z","w"
"x","y","z",""
"x","y","",""
"x","","",""
"","","",""
`
func BenchmarkRead(b *testing.B) {
benchmarkRead(b, nil, benchmarkCSVData)
}
func BenchmarkReadWithFieldsPerRecord(b *testing.B) {
benchmarkRead(b, func(r *Reader) { r.FieldsPerRecord = 4 }, benchmarkCSVData)
}
func BenchmarkReadWithoutFieldsPerRecord(b *testing.B) {
benchmarkRead(b, func(r *Reader) { r.FieldsPerRecord = -1 }, benchmarkCSVData)
}
func BenchmarkReadLargeFields(b *testing.B) {
benchmarkRead(b, nil, strings.Repeat(`xxxxxxxxxxxxxxxx,yyyyyyyyyyyyyyyy,zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz,wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww,vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
xxxxxxxxxxxxxxxxxxxxxxxx,yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy,zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz,wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww,vvvv
,,zzzz,wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww,vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx,yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy,zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz,wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww,vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
`, 3))
}