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Source file src/encoding/csv/writer_test.go

Documentation: encoding/csv

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

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