github.com/cockroachdb/cockroach@v20.2.0-alpha.1+incompatible/pkg/util/encoding/csv/writer_test.go (about)

     1  // Copyright 2019 The Cockroach Authors.
     2  //
     3  // Use of this software is governed by the Business Source License
     4  // included in the file licenses/BSL.txt.
     5  //
     6  // As of the Change Date specified in that file, in accordance with
     7  // the Business Source License, use of this software will be governed
     8  // by the Apache License, Version 2.0, included in the file
     9  // licenses/APL.txt.
    10  
    11  // Copyright 2011 The Go Authors. All rights reserved.
    12  // Use of this source code is governed by a BSD-style
    13  // license that can be found in licenses/BSD-golang.txt.
    14  
    15  package csv
    16  
    17  import (
    18  	"bytes"
    19  	"testing"
    20  
    21  	"github.com/cockroachdb/errors"
    22  )
    23  
    24  var writeTests = []struct {
    25  	Input   [][]string
    26  	Output  string
    27  	UseCRLF bool
    28  }{
    29  	{Input: [][]string{{"abc"}}, Output: "abc\n"},
    30  	{Input: [][]string{{"abc"}}, Output: "abc\r\n", UseCRLF: true},
    31  	{Input: [][]string{{`"abc"`}}, Output: `"""abc"""` + "\n"},
    32  	{Input: [][]string{{`a"b`}}, Output: `"a""b"` + "\n"},
    33  	{Input: [][]string{{`"a"b"`}}, Output: `"""a""b"""` + "\n"},
    34  	{Input: [][]string{{" abc"}}, Output: `" abc"` + "\n"},
    35  	{Input: [][]string{{"abc,def"}}, Output: `"abc,def"` + "\n"},
    36  	{Input: [][]string{{"abc", "def"}}, Output: "abc,def\n"},
    37  	{Input: [][]string{{"abc"}, {"def"}}, Output: "abc\ndef\n"},
    38  	{Input: [][]string{{"abc\ndef"}}, Output: "\"abc\ndef\"\n"},
    39  	{Input: [][]string{{"abc\ndef"}}, Output: "\"abc\r\ndef\"\r\n", UseCRLF: true},
    40  	{Input: [][]string{{"abc\rdef"}}, Output: "\"abcdef\"\r\n", UseCRLF: true},
    41  	{Input: [][]string{{"abc\rdef"}}, Output: "\"abc\rdef\"\n", UseCRLF: false},
    42  	{Input: [][]string{{""}}, Output: "\n"},
    43  	{Input: [][]string{{"", ""}}, Output: ",\n"},
    44  	{Input: [][]string{{"", "", ""}}, Output: ",,\n"},
    45  	{Input: [][]string{{"", "", "a"}}, Output: ",,a\n"},
    46  	{Input: [][]string{{"", "a", ""}}, Output: ",a,\n"},
    47  	{Input: [][]string{{"", "a", "a"}}, Output: ",a,a\n"},
    48  	{Input: [][]string{{"a", "", ""}}, Output: "a,,\n"},
    49  	{Input: [][]string{{"a", "", "a"}}, Output: "a,,a\n"},
    50  	{Input: [][]string{{"a", "a", ""}}, Output: "a,a,\n"},
    51  	{Input: [][]string{{"a", "a", "a"}}, Output: "a,a,a\n"},
    52  	{Input: [][]string{{`\.`}}, Output: "\"\\.\"\n"},
    53  }
    54  
    55  func TestWrite(t *testing.T) {
    56  	for n, tt := range writeTests {
    57  		b := &bytes.Buffer{}
    58  		f := NewWriter(b)
    59  		f.UseCRLF = tt.UseCRLF
    60  		err := f.WriteAll(tt.Input)
    61  		if err != nil {
    62  			t.Errorf("Unexpected error: %s\n", err)
    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  
    71  type errorWriter struct{}
    72  
    73  func (e errorWriter) Write(b []byte) (int, error) {
    74  	return 0, errors.New("Test")
    75  }
    76  
    77  func TestError(t *testing.T) {
    78  	b := &bytes.Buffer{}
    79  	f := NewWriter(b)
    80  	if err := f.Write([]string{"abc"}); err != nil {
    81  		t.Errorf("Unexpected error: %s\n", err)
    82  	}
    83  	f.Flush()
    84  	err := f.Error()
    85  
    86  	if err != nil {
    87  		t.Errorf("Unexpected error: %s\n", err)
    88  	}
    89  
    90  	f = NewWriter(errorWriter{})
    91  	if err := f.Write([]string{"abc"}); err != nil {
    92  		t.Errorf("Unexpected error: %s\n", err)
    93  	}
    94  	f.Flush()
    95  	err = f.Error()
    96  
    97  	if err == nil {
    98  		t.Error("Error should not be nil")
    99  	}
   100  }