Should handle EOF correctly

[cuigh]

Now jsoniter treat io.EOF as normal error, this is not compatible with stdlib, should return io.EOF instead of wrapping it.

[E]2017-12-21 11:40:56.809: server > decode failed: readObjectStart: expect { or n, but found , error found in #10 byte of ...|:["auxo"]}
|..., bigger context ...|service":"Test","method":"Hello"},"args":["auxo"]}

[taowen]

please provide your test code.

[cuigh]

package jsoniter_test

import (
	"bytes"
	"encoding/json"
	"io"
	"testing"

	"github.com/cuigh/auxo/test/assert"
	"github.com/json-iterator/go"
)

func TestEOF1(t *testing.T) {
	var json = jsoniter.ConfigCompatibleWithStandardLibrary
	var s string
	err := json.NewDecoder(&bytes.Buffer{}).Decode(&s)
	assert.Equal(t, io.EOF, err)
}

func TestEOF2(t *testing.T) {
	var s string
	err := json.NewDecoder(&bytes.Buffer{}).Decode(&s)
	assert.Equal(t, io.EOF, err)
}

The first case TestEOF1 on the above will fail:

	json_test.go:17: Not equal: &errors.errorString{s:"EOF"} (expected) != &errors.errorString{s:"ReadString: expects \" or n, but found \x00, error found in #0 byte of ...||..., bigger context ...||..."} (actual)