510 lines
14 KiB
Go
510 lines
14 KiB
Go
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in https://golang.org/LICENSE
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package csv
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import (
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"io"
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"reflect"
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"strings"
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"testing"
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"unicode/utf8"
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)
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func TestRead(t *testing.T) {
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tests := []struct {
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Name string
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Input string
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Output [][]string
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Error error
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// These fields are copied into the Reader
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Comma rune
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Comment rune
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UseFieldsPerRecord bool // false (default) means FieldsPerRecord is -1
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FieldsPerRecord int
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LazyQuotes bool
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TrimLeadingSpace bool
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ReuseRecord bool
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}{{
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Name: "Simple",
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Input: "a,b,c\n",
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Output: [][]string{{"a", "b", "c"}},
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}, {
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Name: "CRLF",
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Input: "a,b\r\nc,d\r\n",
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Output: [][]string{{"a", "b"}, {"c", "d"}},
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}, {
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Name: "BareCR",
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Input: "a,b\rc,d\r\n",
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Output: [][]string{{"a", "b\rc", "d"}},
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}, {
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Name: "RFC4180test",
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Input: `#field1,field2,field3
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"aaa","bb
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b","ccc"
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"a,a","b""bb","ccc"
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zzz,yyy,xxx
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`,
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Output: [][]string{
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{"#field1", "field2", "field3"},
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{"aaa", "bb\nb", "ccc"},
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{"a,a", `b"bb`, "ccc"},
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{"zzz", "yyy", "xxx"},
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},
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UseFieldsPerRecord: true,
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FieldsPerRecord: 0,
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}, {
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Name: "NoEOLTest",
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Input: "a,b,c",
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Output: [][]string{{"a", "b", "c"}},
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}, {
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Name: "Semicolon",
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Input: "a;b;c\n",
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Output: [][]string{{"a", "b", "c"}},
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Comma: ';',
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}, {
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Name: "MultiLine",
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Input: `"two
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line","one line","three
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line
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field"`,
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Output: [][]string{{"two\nline", "one line", "three\nline\nfield"}},
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}, {
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Name: "BlankLine",
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Input: "a,b,c\n\nd,e,f\n\n",
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Output: [][]string{
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{"a", "b", "c"},
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{"d", "e", "f"},
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},
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}, {
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Name: "BlankLineFieldCount",
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Input: "a,b,c\n\nd,e,f\n\n",
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Output: [][]string{
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{"a", "b", "c"},
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{"d", "e", "f"},
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},
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UseFieldsPerRecord: true,
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FieldsPerRecord: 0,
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}, {
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Name: "TrimSpace",
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Input: " a, b, c\n",
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Output: [][]string{{"a", "b", "c"}},
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TrimLeadingSpace: true,
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}, {
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Name: "LeadingSpace",
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Input: " a, b, c\n",
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Output: [][]string{{" a", " b", " c"}},
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}, {
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Name: "Comment",
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Input: "#1,2,3\na,b,c\n#comment",
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Output: [][]string{{"a", "b", "c"}},
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Comment: '#',
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}, {
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Name: "NoComment",
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Input: "#1,2,3\na,b,c",
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Output: [][]string{{"#1", "2", "3"}, {"a", "b", "c"}},
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}, {
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Name: "LazyQuotes",
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Input: `a "word","1"2",a","b`,
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Output: [][]string{{`a "word"`, `1"2`, `a"`, `b`}},
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LazyQuotes: true,
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}, {
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Name: "BareQuotes",
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Input: `a "word","1"2",a"`,
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Output: [][]string{{`a "word"`, `1"2`, `a"`}},
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LazyQuotes: true,
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}, {
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Name: "BareDoubleQuotes",
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Input: `a""b,c`,
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Output: [][]string{{`a""b`, `c`}},
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LazyQuotes: true,
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}, {
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Name: "BadDoubleQuotes",
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Input: `a""b,c`,
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Error: &ParseError{StartLine: 1, Line: 1, Column: 1, Err: ErrBareQuote},
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}, {
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Name: "TrimQuote",
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Input: ` "a"," b",c`,
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Output: [][]string{{"a", " b", "c"}},
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TrimLeadingSpace: true,
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}, {
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Name: "BadBareQuote",
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Input: `a "word","b"`,
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Error: &ParseError{StartLine: 1, Line: 1, Column: 2, Err: ErrBareQuote},
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}, {
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Name: "BadTrailingQuote",
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Input: `"a word",b"`,
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Error: &ParseError{StartLine: 1, Line: 1, Column: 10, Err: ErrBareQuote},
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}, {
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Name: "ExtraneousQuote",
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Input: `"a "word","b"`,
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Error: &ParseError{StartLine: 1, Line: 1, Column: 3, Err: ErrQuote},
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}, {
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Name: "BadFieldCount",
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Input: "a,b,c\nd,e",
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Error: &ParseError{StartLine: 2, Line: 2, Err: ErrFieldCount},
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UseFieldsPerRecord: true,
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FieldsPerRecord: 0,
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}, {
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Name: "BadFieldCount1",
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Input: `a,b,c`,
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Error: &ParseError{StartLine: 1, Line: 1, Err: ErrFieldCount},
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UseFieldsPerRecord: true,
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FieldsPerRecord: 2,
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}, {
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Name: "FieldCount",
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Input: "a,b,c\nd,e",
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Output: [][]string{{"a", "b", "c"}, {"d", "e"}},
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}, {
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Name: "TrailingCommaEOF",
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Input: "a,b,c,",
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Output: [][]string{{"a", "b", "c", ""}},
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}, {
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Name: "TrailingCommaEOL",
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Input: "a,b,c,\n",
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Output: [][]string{{"a", "b", "c", ""}},
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}, {
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Name: "TrailingCommaSpaceEOF",
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Input: "a,b,c, ",
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Output: [][]string{{"a", "b", "c", ""}},
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TrimLeadingSpace: true,
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}, {
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Name: "TrailingCommaSpaceEOL",
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Input: "a,b,c, \n",
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Output: [][]string{{"a", "b", "c", ""}},
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TrimLeadingSpace: true,
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}, {
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Name: "TrailingCommaLine3",
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Input: "a,b,c\nd,e,f\ng,hi,",
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Output: [][]string{{"a", "b", "c"}, {"d", "e", "f"}, {"g", "hi", ""}},
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TrimLeadingSpace: true,
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}, {
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Name: "NotTrailingComma3",
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Input: "a,b,c, \n",
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Output: [][]string{{"a", "b", "c", " "}},
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}, {
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Name: "CommaFieldTest",
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Input: `x,y,z,w
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x,y,z,
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x,y,,
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x,,,
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,,,
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"x","y","z","w"
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"x","y","z",""
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"x","y","",""
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"x","","",""
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"","","",""
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`,
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Output: [][]string{
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{"x", "y", "z", "w"},
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{"x", "y", "z", ""},
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{"x", "y", "", ""},
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{"x", "", "", ""},
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{"", "", "", ""},
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{"x", "y", "z", "w"},
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{"x", "y", "z", ""},
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{"x", "y", "", ""},
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{"x", "", "", ""},
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{"", "", "", ""},
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},
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}, {
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Name: "TrailingCommaIneffective1",
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Input: "a,b,\nc,d,e",
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Output: [][]string{
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{"a", "b", ""},
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{"c", "d", "e"},
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},
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TrimLeadingSpace: true,
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}, {
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Name: "ReadAllReuseRecord",
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Input: "a,b\nc,d",
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Output: [][]string{
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{"a", "b"},
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{"c", "d"},
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},
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ReuseRecord: true,
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}, {
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Name: "StartLine1", // Issue 19019
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Input: "a,\"b\nc\"d,e",
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Error: &ParseError{StartLine: 1, Line: 2, Column: 1, Err: ErrQuote},
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}, {
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Name: "StartLine2",
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Input: "a,b\n\"d\n\n,e",
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Error: &ParseError{StartLine: 2, Line: 5, Column: 0, Err: ErrQuote},
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}, {
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Name: "CRLFInQuotedField", // Issue 21201
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Input: "A,\"Hello\r\nHi\",B\r\n",
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Output: [][]string{
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{"A", "Hello\nHi", "B"},
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},
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}, {
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Name: "BinaryBlobField", // Issue 19410
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Input: "x09\x41\xb4\x1c,aktau",
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Output: [][]string{{"x09A\xb4\x1c", "aktau"}},
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}, {
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Name: "TrailingCR",
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Input: "field1,field2\r",
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Output: [][]string{{"field1", "field2"}},
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}, {
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Name: "QuotedTrailingCR",
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Input: "\"field\"\r",
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Output: [][]string{{"field"}},
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}, {
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Name: "QuotedTrailingCRCR",
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Input: "\"field\"\r\r",
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Error: &ParseError{StartLine: 1, Line: 1, Column: 6, Err: ErrQuote},
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}, {
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Name: "FieldCR",
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Input: "field\rfield\r",
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Output: [][]string{{"field\rfield"}},
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}, {
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Name: "FieldCRCR",
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Input: "field\r\rfield\r\r",
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Output: [][]string{{"field\r\rfield\r"}},
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}, {
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Name: "FieldCRCRLF",
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Input: "field\r\r\nfield\r\r\n",
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Output: [][]string{{"field\r"}, {"field\r"}},
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}, {
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Name: "FieldCRCRLFCR",
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Input: "field\r\r\n\rfield\r\r\n\r",
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Output: [][]string{{"field\r"}, {"\rfield\r"}},
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}, {
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Name: "FieldCRCRLFCRCR",
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Input: "field\r\r\n\r\rfield\r\r\n\r\r",
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Output: [][]string{{"field\r"}, {"\r\rfield\r"}, {"\r"}},
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}, {
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Name: "MultiFieldCRCRLFCRCR",
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Input: "field1,field2\r\r\n\r\rfield1,field2\r\r\n\r\r,",
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Output: [][]string{
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{"field1", "field2\r"},
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{"\r\rfield1", "field2\r"},
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{"\r\r", ""},
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},
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}, {
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Name: "NonASCIICommaAndComment",
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Input: "a£b,c£ \td,e\n€ comment\n",
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Output: [][]string{{"a", "b,c", "d,e"}},
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TrimLeadingSpace: true,
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Comma: '£',
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Comment: '€',
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}, {
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Name: "NonASCIICommaAndCommentWithQuotes",
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Input: "a€\" b,\"€ c\nλ comment\n",
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Output: [][]string{{"a", " b,", " c"}},
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Comma: '€',
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Comment: 'λ',
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}, {
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// λ and θ start with the same byte.
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// This tests that the parser doesn't confuse such characters.
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Name: "NonASCIICommaConfusion",
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Input: "\"abθcd\"λefθgh",
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Output: [][]string{{"abθcd", "efθgh"}},
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Comma: 'λ',
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Comment: '€',
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}, {
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Name: "NonASCIICommentConfusion",
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Input: "λ\nλ\nθ\nλ\n",
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Output: [][]string{{"λ"}, {"λ"}, {"λ"}},
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Comment: 'θ',
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}, {
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Name: "QuotedFieldMultipleLF",
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Input: "\"\n\n\n\n\"",
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Output: [][]string{{"\n\n\n\n"}},
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}, {
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Name: "MultipleCRLF",
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Input: "\r\n\r\n\r\n\r\n",
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}, {
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// The implementation may read each line in several chunks if it doesn't fit entirely
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// in the read buffer, so we should test the code to handle that condition.
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Name: "HugeLines",
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Input: strings.Repeat("#ignore\n", 10000) + strings.Repeat("@", 5000) + "," + strings.Repeat("*", 5000),
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Output: [][]string{{strings.Repeat("@", 5000), strings.Repeat("*", 5000)}},
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Comment: '#',
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}, {
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Name: "QuoteWithTrailingCRLF",
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Input: "\"foo\"bar\"\r\n",
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Error: &ParseError{StartLine: 1, Line: 1, Column: 4, Err: ErrQuote},
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}, {
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Name: "LazyQuoteWithTrailingCRLF",
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Input: "\"foo\"bar\"\r\n",
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Output: [][]string{{`foo"bar`}},
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LazyQuotes: true,
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}, {
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Name: "DoubleQuoteWithTrailingCRLF",
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Input: "\"foo\"\"bar\"\r\n",
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Output: [][]string{{`foo"bar`}},
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}, {
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Name: "EvenQuotes",
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Input: `""""""""`,
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Output: [][]string{{`"""`}},
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}, {
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Name: "OddQuotes",
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Input: `"""""""`,
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Error: &ParseError{StartLine: 1, Line: 1, Column: 7, Err: ErrQuote},
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}, {
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Name: "LazyOddQuotes",
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Input: `"""""""`,
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Output: [][]string{{`"""`}},
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LazyQuotes: true,
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}, {
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Name: "BadComma1",
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Comma: '\n',
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||
|
|
Error: errInvalidDelim,
|
||
|
|
}, {
|
||
|
|
Name: "BadComma2",
|
||
|
|
Comma: '\r',
|
||
|
|
Error: errInvalidDelim,
|
||
|
|
}, {
|
||
|
|
Name: "BadComma3",
|
||
|
|
Comma: '"',
|
||
|
|
Error: errInvalidDelim,
|
||
|
|
}, {
|
||
|
|
Name: "BadComma4",
|
||
|
|
Comma: utf8.RuneError,
|
||
|
|
Error: errInvalidDelim,
|
||
|
|
}, {
|
||
|
|
Name: "BadComment1",
|
||
|
|
Comment: '\n',
|
||
|
|
Error: errInvalidDelim,
|
||
|
|
}, {
|
||
|
|
Name: "BadComment2",
|
||
|
|
Comment: '\r',
|
||
|
|
Error: errInvalidDelim,
|
||
|
|
}, {
|
||
|
|
Name: "BadComment3",
|
||
|
|
Comment: utf8.RuneError,
|
||
|
|
Error: errInvalidDelim,
|
||
|
|
}, {
|
||
|
|
Name: "BadCommaComment",
|
||
|
|
Comma: 'X',
|
||
|
|
Comment: 'X',
|
||
|
|
Error: errInvalidDelim,
|
||
|
|
}}
|
||
|
|
|
||
|
|
for _, tt := range tests {
|
||
|
|
t.Run(tt.Name, func(t *testing.T) {
|
||
|
|
r := NewReader(strings.NewReader(tt.Input))
|
||
|
|
|
||
|
|
if tt.Comma != 0 {
|
||
|
|
r.Comma = tt.Comma
|
||
|
|
}
|
||
|
|
r.Comment = tt.Comment
|
||
|
|
if tt.UseFieldsPerRecord {
|
||
|
|
r.FieldsPerRecord = tt.FieldsPerRecord
|
||
|
|
} else {
|
||
|
|
r.FieldsPerRecord = -1
|
||
|
|
}
|
||
|
|
r.LazyQuotes = tt.LazyQuotes
|
||
|
|
r.TrimLeadingSpace = tt.TrimLeadingSpace
|
||
|
|
r.ReuseRecord = tt.ReuseRecord
|
||
|
|
|
||
|
|
out, err := r.ReadAll()
|
||
|
|
if !reflect.DeepEqual(err, tt.Error) {
|
||
|
|
t.Errorf("ReadAll() error:\ngot %v\nwant %v", err, tt.Error)
|
||
|
|
} else if !reflect.DeepEqual(out, tt.Output) {
|
||
|
|
t.Errorf("ReadAll() output:\ngot %q\nwant %q", 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))
|
||
|
|
}
|
||
|
|
|
||
|
|
func BenchmarkReadReuseRecord(b *testing.B) {
|
||
|
|
benchmarkRead(b, func(r *Reader) { r.ReuseRecord = true }, benchmarkCSVData)
|
||
|
|
}
|
||
|
|
|
||
|
|
func BenchmarkReadReuseRecordWithFieldsPerRecord(b *testing.B) {
|
||
|
|
benchmarkRead(b, func(r *Reader) { r.ReuseRecord = true; r.FieldsPerRecord = 4 }, benchmarkCSVData)
|
||
|
|
}
|
||
|
|
|
||
|
|
func BenchmarkReadReuseRecordWithoutFieldsPerRecord(b *testing.B) {
|
||
|
|
benchmarkRead(b, func(r *Reader) { r.ReuseRecord = true; r.FieldsPerRecord = -1 }, benchmarkCSVData)
|
||
|
|
}
|
||
|
|
|
||
|
|
func BenchmarkReadReuseRecordLargeFields(b *testing.B) {
|
||
|
|
benchmarkRead(b, func(r *Reader) { r.ReuseRecord = true }, strings.Repeat(`xxxxxxxxxxxxxxxx,yyyyyyyyyyyyyyyy,zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz,wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww,vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
|
||
|
|
xxxxxxxxxxxxxxxxxxxxxxxx,yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy,zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz,wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww,vvvv
|
||
|
|
,,zzzz,wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww,vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
|
||
|
|
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx,yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy,zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz,wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww,vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
|
||
|
|
`, 3))
|
||
|
|
}
|