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basic_test.go
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basic_test.go
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package jsl
import (
"bufio"
"bytes"
"encoding/json"
"fmt"
"io"
"strings"
"testing"
"github.com/dop251/goja"
)
var INPUT_TEXT string = `{"i": 0, "double": 0}
{"i": 1, "double": 2}
{"i": 2, "double": 4}
{"i": 3, "double": 6}
{"i": 4, "double": 8}
{"i": 5, "double": 10}
{"i": 6, "double": 12}
{"i": 7, "double": 14}
{"i": 8, "double": 16}
{"i": 9, "double": 18}
`
type InputObject struct {
I int
Double int
Name string
}
func GojaValueToStruct(value *goja.Object, i interface{}) error {
var b []byte
var err error
b, err = json.Marshal(value)
if err != nil {
return err
}
err = json.Unmarshal(b, i)
if err != nil {
return err
}
return nil
}
func TestIteratorWithString(t *testing.T) {
r := strings.NewReader(INPUT_TEXT)
var content string
writer := bytes.NewBufferString(content)
enc := json.NewEncoder(writer)
iter, err := NewIterator(&IterConfig{
Emitter: func(i interface{}) {
enc.Encode(i)
},
Iter: "i.double*2",
})
if err != nil {
t.Errorf("Failed to create iterator.")
}
reader := bufio.NewReader(r)
var obj interface{}
iter.PreIteration()
for {
var readErr error
line, readErr := reader.ReadString('\n')
if readErr != nil && readErr != io.EOF {
break
}
if readErr == io.EOF {
break
}
obj, err = LoadLine(strings.TrimSpace(line))
if err != nil {
t.Errorf("Failed to parse json: %s", err)
}
err := iter.IterFunc(obj)
if err != nil {
t.Errorf("Iteration failed: %s", err)
}
}
if writer.String() != "0\n4\n8\n12\n16\n20\n24\n28\n32\n36\n" {
t.Errorf("Output not correct.")
}
}
func TestIterator_WithFilter(t *testing.T) {
var results []interface{} = []interface{}{}
iter, _ := NewIterator(&IterConfig{
Emitter: func(i interface{}) {
results = append(results, i)
},
Filter: "i.Double < 10",
Iter: "i",
})
iter.PreIteration()
for i := 0; i < 10; i += 1 {
err := iter.IterFunc(InputObject{I: i, Double: i * 2})
if err != nil {
t.Errorf("iteration failed.")
}
}
iter.PostIteration()
if len(results) != 5 {
fmt.Println(results)
t.Errorf("Incorrect result length.")
}
}
func TestIterator_WithDedupe(t *testing.T) {
var results []interface{} = []interface{}{}
iter, _ := NewIterator(&IterConfig{
Emitter: func(i interface{}) {
results = append(results, i)
},
Dedupe: "i.I % 2",
Iter: "i",
})
iter.PreIteration()
for i := 0; i < 10; i += 1 {
err := iter.IterFunc(InputObject{I: i, Double: i * 2})
if err != nil {
t.Errorf("iteration failed.")
}
}
iter.PostIteration()
if len(results) != 2 {
t.Errorf("Incorrect result length.")
}
var target0 InputObject
if err := GojaValueToStruct(results[0].(*goja.Object), &target0); err != nil {
fmt.Println(err)
t.Errorf("Goja value coerce failure.")
}
var target1 InputObject
if err := GojaValueToStruct(results[1].(*goja.Object), &target1); err != nil {
fmt.Println(err)
t.Errorf("Goja value coerce failure.")
}
}
func TestIterator_WithAccum(t *testing.T) {
var results []interface{} = []interface{}{}
iter, _ := NewIterator(&IterConfig{
Emitter: func(i interface{}) {
results = append(results, i)
},
Pre: "{count:0}",
Post: "accum.count",
Accumulator: "accum.count+=i.Double",
})
iter.PreIteration()
for i := 0; i < 10; i += 1 {
err := iter.IterFunc(InputObject{I: i, Double: i * 2})
if err != nil {
t.Errorf("iteration failed.")
}
}
iter.PostIteration()
if len(results) != 1 {
t.Errorf("Incorrect result length.")
}
if results[0].(goja.Value).ToInteger() != 90 {
t.Errorf("Sum Accumulator failed.")
}
}
// func BenchmarkHello(b *testing.B) {
// for i := 0; i < b.N; i++ {
// }
// }