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|
package breader
import (
"fmt"
"io/ioutil"
"os"
"strconv"
"strings"
"testing"
)
var testfile = "testdata.tsv"
func TestUnprocessedText(t *testing.T) {
var text []string
fn := func(line string) (interface{}, bool, error) {
return line, true, nil
}
reader, err := NewBufferedReader(testfile, 2, 4, fn)
if err != nil {
t.Error(err)
return
}
for chunk := range reader.Ch {
if chunk.Err != nil {
t.Error(chunk.Err)
return
}
for _, data := range chunk.Data {
text = append(text, data.(string))
}
}
originalText, err := readFileText(testfile)
if err != nil {
t.Error(err)
return
}
if strings.Join(text, "") != originalText {
t.Error("text unmatch")
}
}
func TestProcessedText(t *testing.T) {
type Slice []string
fn := func(line string) (interface{}, bool, error) {
line = strings.TrimRight(line, "\n")
if line == "" || line[0] == '#' {
return "", false, nil
}
items := strings.Split(line, "\t")
if len(items) != 2 {
return items, false, nil
}
return Slice(items), true, nil
}
reader, err := NewBufferedReader(testfile, 2, 4, fn)
if err != nil {
t.Error(err)
return
}
n := 0
for chunk := range reader.Ch {
if chunk.Err != nil {
t.Error(chunk.Err)
return
}
for _, data := range chunk.Data {
// switch reflect.TypeOf(data).Kind() {
// case reflect.Slice:
// s := reflect.ValueOf(data)
// items := make([]string, s.Len())
// for i := 0; i < s.Len(); i++ {
// items[i] = s.Index(i).String()
// }
// fmt.Println(items)
// n++
// }
fmt.Println(data.(Slice))
n++
}
}
if n != 9 {
t.Error("testing TestProcessedText failed")
}
}
func TestCancellation(t *testing.T) {
reader, err := NewBufferedReader(testfile, 1, 1, DefaultFunc)
if err != nil {
t.Error(err)
return
}
// note that range is bufferd. using range will be failed
// for chunk := range reader.Ch {
LOOP:
for {
select {
case chunk := <-reader.Ch:
if chunk.Err != nil {
t.Log(chunk.Err)
return
}
reader.Cancel()
break LOOP
default:
}
}
}
func TestProcessedTextReturnObject(t *testing.T) {
type string2int struct {
id string
value int
}
fn := func(line string) (interface{}, bool, error) {
line = strings.TrimRight(line, "\n")
if line == "" || line[0] == '#' {
return nil, false, nil
}
items := strings.Split(line, "\t")
if len(items) != 2 {
return nil, false, nil
}
if items[0] == "" || items[1] == "" {
return nil, false, nil
}
id := items[0]
value, err := strconv.Atoi(items[1])
if err != nil {
return nil, false, err
}
return string2int{id, value}, true, nil
}
reader, err := NewBufferedReader(testfile, 2, 4, fn)
if err != nil {
t.Error(err)
return
}
n := 0
for chunk := range reader.Ch {
if chunk.Err != nil {
t.Error(chunk.Err)
return
}
for _, data := range chunk.Data {
_ = data.(string2int)
n++
}
}
if n != 7 {
t.Error("testing TestProcessedTextReturnObject failed")
}
}
func readFileText(file string) (string, error) {
fh, err := os.Open(file)
defer fh.Close()
if err != nil {
return "", err
}
bs, _ := ioutil.ReadAll(fh)
return string(bs), nil
}
|
