libgo/go/encoding/csv/writer_test.go

   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         UseCRLF bool
  17 }{
  18         {Input: [][]string{{"abc"}}, Output: "abc\n"},
  19         {Input: [][]string{{"abc"}}, Output: "abc\r\n", UseCRLF: true},
  20         {Input: [][]string{{`"abc"`}}, Output: `"""abc"""` + "\n"},
  21         {Input: [][]string{{`a"b`}}, Output: `"a""b"` + "\n"},
  22         {Input: [][]string{{`"a"b"`}}, Output: `"""a""b"""` + "\n"},
  23         {Input: [][]string{{" abc"}}, Output: `" abc"` + "\n"},
  24         {Input: [][]string{{"abc,def"}}, Output: `"abc,def"` + "\n"},
  25         {Input: [][]string{{"abc", "def"}}, Output: "abc,def\n"},
  26         {Input: [][]string{{"abc"}, {"def"}}, Output: "abc\ndef\n"},
  27         {Input: [][]string{{"abc\ndef"}}, Output: "\"abc\ndef\"\n"},
  28         {Input: [][]string{{"abc\ndef"}}, Output: "\"abc\r\ndef\"\r\n", UseCRLF: true},
  29         {Input: [][]string{{"abc\rdef"}}, Output: "\"abcdef\"\r\n", UseCRLF: true},
  30         {Input: [][]string{{"abc\rdef"}}, Output: "\"abc\rdef\"\n", UseCRLF: false},
  31 }
  32
  33 func TestWrite(t *testing.T) {
  34         for n, tt := range writeTests {
  35                 b := &bytes.Buffer{}
  36                 f := NewWriter(b)
  37                 f.UseCRLF = tt.UseCRLF
  38                 err := f.WriteAll(tt.Input)
  39                 if err != nil {
  40                         t.Errorf("Unexpected error: %s\n", err)
  41                 }
  42                 out := b.String()
  43                 if out != tt.Output {
  44                         t.Errorf("#%d: out=%q want %q", n, out, tt.Output)
  45                 }
  46         }
  47 }
  48
  49 type errorWriter struct{}
  50
  51 func (e errorWriter) Write(b []byte) (int, error) {
  52         return 0, errors.New("Test")
  53 }
  54
  55 func TestError(t *testing.T) {
  56         b := &bytes.Buffer{}
  57         f := NewWriter(b)
  58         f.Write([]string{"abc"})
  59         f.Flush()
  60         err := f.Error()
  61
  62         if err != nil {
  63                 t.Errorf("Unexpected error: %s\n", err)
  64         }
  65
  66         f = NewWriter(errorWriter{})
  67         f.Write([]string{"abc"})
  68         f.Flush()
  69         err = f.Error()
  70
  71         if err == nil {
  72                 t.Error("Error should not be nil")
  73         }
  74 }