1// Copyright 2011 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package csv
6
7import (
8	"bytes"
9	"errors"
10	"strings"
11	"testing"
12)
13
14var writeTests = []struct {
15	Input   [][]string
16	Output  string
17	Error   error
18	UseCRLF bool
19	Comma   rune
20}{
21	{Input: [][]string{{"abc"}}, Output: "abc\n"},
22	{Input: [][]string{{"abc"}}, Output: "abc\r\n", UseCRLF: true},
23	{Input: [][]string{{`"abc"`}}, Output: `"""abc"""` + "\n"},
24	{Input: [][]string{{`a"b`}}, Output: `"a""b"` + "\n"},
25	{Input: [][]string{{`"a"b"`}}, Output: `"""a""b"""` + "\n"},
26	{Input: [][]string{{" abc"}}, Output: `" abc"` + "\n"},
27	{Input: [][]string{{"abc,def"}}, Output: `"abc,def"` + "\n"},
28	{Input: [][]string{{"abc", "def"}}, Output: "abc,def\n"},
29	{Input: [][]string{{"abc"}, {"def"}}, Output: "abc\ndef\n"},
30	{Input: [][]string{{"abc\ndef"}}, Output: "\"abc\ndef\"\n"},
31	{Input: [][]string{{"abc\ndef"}}, Output: "\"abc\r\ndef\"\r\n", UseCRLF: true},
32	{Input: [][]string{{"abc\rdef"}}, Output: "\"abcdef\"\r\n", UseCRLF: true},
33	{Input: [][]string{{"abc\rdef"}}, Output: "\"abc\rdef\"\n", UseCRLF: false},
34	{Input: [][]string{{""}}, Output: "\n"},
35	{Input: [][]string{{"", ""}}, Output: ",\n"},
36	{Input: [][]string{{"", "", ""}}, Output: ",,\n"},
37	{Input: [][]string{{"", "", "a"}}, Output: ",,a\n"},
38	{Input: [][]string{{"", "a", ""}}, Output: ",a,\n"},
39	{Input: [][]string{{"", "a", "a"}}, Output: ",a,a\n"},
40	{Input: [][]string{{"a", "", ""}}, Output: "a,,\n"},
41	{Input: [][]string{{"a", "", "a"}}, Output: "a,,a\n"},
42	{Input: [][]string{{"a", "a", ""}}, Output: "a,a,\n"},
43	{Input: [][]string{{"a", "a", "a"}}, Output: "a,a,a\n"},
44	{Input: [][]string{{`\.`}}, Output: "\"\\.\"\n"},
45	{Input: [][]string{{"x09\x41\xb4\x1c", "aktau"}}, Output: "x09\x41\xb4\x1c,aktau\n"},
46	{Input: [][]string{{",x09\x41\xb4\x1c", "aktau"}}, Output: "\",x09\x41\xb4\x1c\",aktau\n"},
47	{Input: [][]string{{"a", "a", ""}}, Output: "a|a|\n", Comma: '|'},
48	{Input: [][]string{{",", ",", ""}}, Output: ",|,|\n", Comma: '|'},
49	{Input: [][]string{{"foo"}}, Comma: '"', Error: errInvalidDelim},
50}
51
52func TestWrite(t *testing.T) {
53	for n, tt := range writeTests {
54		b := &strings.Builder{}
55		f := NewWriter(b)
56		f.UseCRLF = tt.UseCRLF
57		if tt.Comma != 0 {
58			f.Comma = tt.Comma
59		}
60		err := f.WriteAll(tt.Input)
61		if err != tt.Error {
62			t.Errorf("Unexpected error:\ngot  %v\nwant %v", err, tt.Error)
63		}
64		out := b.String()
65		if out != tt.Output {
66			t.Errorf("#%d: out=%q want %q", n, out, tt.Output)
67		}
68	}
69}
70
71type errorWriter struct{}
72
73func (e errorWriter) Write(b []byte) (int, error) {
74	return 0, errors.New("Test")
75}
76
77func TestError(t *testing.T) {
78	b := &bytes.Buffer{}
79	f := NewWriter(b)
80	f.Write([]string{"abc"})
81	f.Flush()
82	err := f.Error()
83
84	if err != nil {
85		t.Errorf("Unexpected error: %s\n", err)
86	}
87
88	f = NewWriter(errorWriter{})
89	f.Write([]string{"abc"})
90	f.Flush()
91	err = f.Error()
92
93	if err == nil {
94		t.Error("Error should not be nil")
95	}
96}
97
98var benchmarkWriteData = [][]string{
99	{"abc", "def", "12356", "1234567890987654311234432141542132"},
100	{"abc", "def", "12356", "1234567890987654311234432141542132"},
101	{"abc", "def", "12356", "1234567890987654311234432141542132"},
102}
103
104func BenchmarkWrite(b *testing.B) {
105	for i := 0; i < b.N; i++ {
106		w := NewWriter(&bytes.Buffer{})
107		err := w.WriteAll(benchmarkWriteData)
108		if err != nil {
109			b.Fatal(err)
110		}
111		w.Flush()
112	}
113}
114