/
rot13_test.go
189 lines (153 loc) · 3.48 KB
/
rot13_test.go
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// Copyright 2014 The Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package rot13
import (
"bytes"
"io"
"io/ioutil"
"reflect"
"testing"
)
var strings = []pair{
pair{"123", "123"},
pair{"abc", "nop"},
pair{"ABC", "NOP"},
pair{"123abc", "123nop"},
pair{"123ABC", "123NOP"},
pair{"a123Bc", "n123Op"},
pair{string([]byte{0x80, 'a'}), string([]byte{0x80, 'n'})},
}
type pair struct {
before, after string
}
func (p pair) testByteRead(t *testing.T) {
strBytes := []byte(p.before)
buf := bytes.NewBuffer(strBytes)
r := NewReader(buf)
dst, err := ioutil.ReadAll(r)
if err != nil {
t.Errorf("Unexpected error %v", err)
}
if !reflect.DeepEqual(dst, []byte(p.after)) {
t.Errorf("Expected \"%s\"; got \"%s\"", p.after, string(dst))
}
}
func (p pair) testByteWrite(t *testing.T) {
strBytes := []byte(p.before)
var buf bytes.Buffer
w := NewWriter(&buf)
_, err := writeAll(strBytes, w)
if err != nil {
t.Errorf("Unexpected error %v", err)
}
dst := buf.Bytes()
if !reflect.DeepEqual(dst, []byte(p.after)) {
t.Errorf("Expected \"%s\"; got \"%s\"", p.after, string(dst))
}
}
func (p pair) testRuneRead(t *testing.T) {
strBytes := []byte(p.before)
buf := bytes.NewBuffer(strBytes)
r := NewRuneReader(buf)
dst, err := readAllRunes(r)
if err != nil {
t.Errorf("Unexpected error %v", err)
}
if !reflect.DeepEqual(dst, []rune(p.after)) {
t.Errorf("Expected \"%s\"; got \"%s\"", p.after, string(dst))
}
}
func (p pair) testRot13(t *testing.T) {
strBytes := []byte(p.before)
for i, v := range strBytes {
strBytes[i] = Rot13(v)
}
if !reflect.DeepEqual(strBytes, []byte(p.after)) {
t.Errorf("Expected \"%s\"; got \"%s\"", p.after, string(strBytes))
}
}
func (p pair) testRot13Bytes(t *testing.T) {
strBytes := []byte(p.before)
Rot13Bytes(strBytes)
if !reflect.DeepEqual(strBytes, []byte(p.after)) {
t.Errorf("Expected \"%s\"; got \"%s\"", p.after, string(strBytes))
}
}
func (p pair) testRot13Rune(t *testing.T) {
strRunes := []rune(p.before)
for i, v := range strRunes {
strRunes[i] = Rot13Rune(v)
}
if !reflect.DeepEqual(strRunes, []rune(p.after)) {
t.Errorf("Expected \"%s\"; got \"%s\"", p.after, string(strRunes))
}
}
func (p pair) testRot13Runes(t *testing.T) {
strRunes := []rune(p.before)
Rot13Runes(strRunes)
if !reflect.DeepEqual(strRunes, []rune(p.after)) {
t.Errorf("Expected \"%s\"; got \"%s\"", p.after, string(strRunes))
}
}
func TestByteReader(t *testing.T) {
for _, p := range strings {
p.testByteRead(t)
}
}
func TestByteWriter(t *testing.T) {
for _, p := range strings {
p.testByteWrite(t)
}
}
func TestRuneReader(t *testing.T) {
for _, p := range strings {
p.testRuneRead(t)
}
}
func TestRot13(t *testing.T) {
for _, p := range strings {
p.testRot13(t)
}
}
func TestRot13Bytes(t *testing.T) {
for _, p := range strings {
p.testRot13Bytes(t)
}
}
func TestRot13Rune(t *testing.T) {
for _, p := range strings {
p.testRot13Rune(t)
}
}
func TestRot13Runes(t *testing.T) {
for _, p := range strings {
p.testRot13Runes(t)
}
}
func writeAll(p []byte, w io.Writer) (int, error) {
n := 0
for len(p) > 0 {
nn, err := w.Write(p)
n += nn
if err != nil {
return n, err
}
p = p[nn:]
}
return n, nil
}
func readAllRunes(r io.RuneReader) ([]rune, error) {
p := make([]rune, 0)
for {
rn, _, err := r.ReadRune()
if err != nil {
if err == io.EOF {
return p, nil
}
return p, err
}
p = append(p, rn)
}
return p, nil
}