diff --git a/.codecov.yml b/.codecov.yml
new file mode 100644
index 0000000..ed1daa2
--- /dev/null
+++ b/.codecov.yml
@@ -0,0 +1,5 @@
+ignore:
+    - "output_tests/.*"
+    - "assert/.*"
+    - "require/.*"
+
diff --git a/feature_any_float.go b/feature_any_float.go
index ad037b8..dec4ff9 100644
--- a/feature_any_float.go
+++ b/feature_any_float.go
@@ -42,15 +42,24 @@ func (any *floatAny) ToInt64() int64 {
 }
 
 func (any *floatAny) ToUint() uint {
-	return uint(any.val)
+	if any.val > 0 {
+		return uint(any.val)
+	}
+	return 0
 }
 
 func (any *floatAny) ToUint32() uint32 {
-	return uint32(any.val)
+	if any.val > 0 {
+		return uint32(any.val)
+	}
+	return 0
 }
 
 func (any *floatAny) ToUint64() uint64 {
-	return uint64(any.val)
+	if any.val > 0 {
+		return uint64(any.val)
+	}
+	return 0
 }
 
 func (any *floatAny) ToFloat32() float32 {
diff --git a/feature_any_number.go b/feature_any_number.go
index 1dc0244..d909044 100644
--- a/feature_any_number.go
+++ b/feature_any_number.go
@@ -1,8 +1,6 @@
 package jsoniter
 
-import (
-	"unsafe"
-)
+import "unsafe"
 
 type numberLazyAny struct {
 	baseAny
diff --git a/feature_any_object.go b/feature_any_object.go
index 7382233..5386f83 100644
--- a/feature_any_object.go
+++ b/feature_any_object.go
@@ -25,73 +25,39 @@ func (any *objectLazyAny) LastError() error {
 }
 
 func (any *objectLazyAny) ToBool() bool {
-	iter := any.cfg.BorrowIterator(any.buf)
-	defer any.cfg.ReturnIterator(iter)
-	return iter.ReadObject() != ""
+	return true
 }
 
 func (any *objectLazyAny) ToInt() int {
-	if any.ToBool() {
-		return 1
-	} else {
-		return 0
-	}
+	return 0
 }
 
 func (any *objectLazyAny) ToInt32() int32 {
-	if any.ToBool() {
-		return 1
-	} else {
-		return 0
-	}
+	return 0
 }
 
 func (any *objectLazyAny) ToInt64() int64 {
-	if any.ToBool() {
-		return 1
-	} else {
-		return 0
-	}
+	return 0
 }
 
 func (any *objectLazyAny) ToUint() uint {
-	if any.ToBool() {
-		return 1
-	} else {
-		return 0
-	}
+	return 0
 }
 
 func (any *objectLazyAny) ToUint32() uint32 {
-	if any.ToBool() {
-		return 1
-	} else {
-		return 0
-	}
+	return 0
 }
 
 func (any *objectLazyAny) ToUint64() uint64 {
-	if any.ToBool() {
-		return 1
-	} else {
-		return 0
-	}
+	return 0
 }
 
 func (any *objectLazyAny) ToFloat32() float32 {
-	if any.ToBool() {
-		return 1
-	} else {
-		return 0
-	}
+	return 0
 }
 
 func (any *objectLazyAny) ToFloat64() float64 {
-	if any.ToBool() {
-		return 1
-	} else {
-		return 0
-	}
+	return 0
 }
 
 func (any *objectLazyAny) ToString() string {
@@ -216,59 +182,35 @@ func (any *objectAny) ToBool() bool {
 }
 
 func (any *objectAny) ToInt() int {
-	if any.val.NumField() == 0 {
-		return 0
-	}
-	return 1
+	return 0
 }
 
 func (any *objectAny) ToInt32() int32 {
-	if any.val.NumField() == 0 {
-		return 0
-	}
-	return 1
+	return 0
 }
 
 func (any *objectAny) ToInt64() int64 {
-	if any.val.NumField() == 0 {
-		return 0
-	}
-	return 1
+	return 0
 }
 
 func (any *objectAny) ToUint() uint {
-	if any.val.NumField() == 0 {
-		return 0
-	}
-	return 1
+	return 0
 }
 
 func (any *objectAny) ToUint32() uint32 {
-	if any.val.NumField() == 0 {
-		return 0
-	}
-	return 1
+	return 0
 }
 
 func (any *objectAny) ToUint64() uint64 {
-	if any.val.NumField() == 0 {
-		return 0
-	}
-	return 1
+	return 0
 }
 
 func (any *objectAny) ToFloat32() float32 {
-	if any.val.NumField() == 0 {
-		return 0
-	}
-	return 1
+	return 0
 }
 
 func (any *objectAny) ToFloat64() float64 {
-	if any.val.NumField() == 0 {
-		return 0
-	}
-	return 1
+	return 0
 }
 
 func (any *objectAny) ToString() string {
@@ -367,63 +309,39 @@ func (any *mapAny) LastError() error {
 }
 
 func (any *mapAny) ToBool() bool {
-	return any.val.Len() != 0
+	return true
 }
 
 func (any *mapAny) ToInt() int {
-	if any.val.Len() == 0 {
-		return 0
-	}
-	return 1
+	return 0
 }
 
 func (any *mapAny) ToInt32() int32 {
-	if any.val.Len() == 0 {
-		return 0
-	}
-	return 1
+	return 0
 }
 
 func (any *mapAny) ToInt64() int64 {
-	if any.val.Len() == 0 {
-		return 0
-	}
-	return 1
+	return 0
 }
 
 func (any *mapAny) ToUint() uint {
-	if any.val.Len() == 0 {
-		return 0
-	}
-	return 1
+	return 0
 }
 
 func (any *mapAny) ToUint32() uint32 {
-	if any.val.Len() == 0 {
-		return 0
-	}
-	return 1
+	return 0
 }
 
 func (any *mapAny) ToUint64() uint64 {
-	if any.val.Len() == 0 {
-		return 0
-	}
-	return 1
+	return 0
 }
 
 func (any *mapAny) ToFloat32() float32 {
-	if any.val.Len() == 0 {
-		return 0
-	}
-	return 1
+	return 0
 }
 
 func (any *mapAny) ToFloat64() float64 {
-	if any.val.Len() == 0 {
-		return 0
-	}
-	return 1
+	return 0
 }
 
 func (any *mapAny) ToString() string {
diff --git a/feature_any_string.go b/feature_any_string.go
index e3dcd6a..5a0e8da 100644
--- a/feature_any_string.go
+++ b/feature_any_string.go
@@ -35,7 +35,7 @@ func (any *stringAny) LastError() error {
 
 func (any *stringAny) ToBool() bool {
 	str := any.ToString()
-	if str == "false" {
+	if str == "0" {
 		return false
 	}
 	for _, c := range str {
@@ -49,42 +49,107 @@ func (any *stringAny) ToBool() bool {
 }
 
 func (any *stringAny) ToInt() int {
-	parsed, _ := strconv.ParseInt(any.val, 10, 64)
-	return int(parsed)
+	return int(any.ToInt64())
+
 }
 
 func (any *stringAny) ToInt32() int32 {
-	parsed, _ := strconv.ParseInt(any.val, 10, 32)
-	return int32(parsed)
+	return int32(any.ToInt64())
 }
 
 func (any *stringAny) ToInt64() int64 {
-	parsed, _ := strconv.ParseInt(any.val, 10, 64)
-	return parsed
+	if any.val == "" {
+		return 0
+	}
+
+	flag := 1
+	startPos := 0
+	endPos := 0
+	if any.val[0] == '+' || any.val[0] == '-' {
+		startPos = 1
+	}
+
+	if any.val[0] == '-' {
+		flag = -1
+	}
+
+	for i := startPos; i < len(any.val); i++ {
+		if any.val[i] >= '0' && any.val[i] <= '9' {
+			endPos = i + 1
+		} else {
+			break
+		}
+	}
+	parsed, _ := strconv.ParseInt(any.val[startPos:endPos], 10, 64)
+	return int64(flag) * parsed
 }
 
 func (any *stringAny) ToUint() uint {
-	parsed, _ := strconv.ParseUint(any.val, 10, 64)
-	return uint(parsed)
+	return uint(any.ToUint64())
 }
 
 func (any *stringAny) ToUint32() uint32 {
-	parsed, _ := strconv.ParseUint(any.val, 10, 32)
-	return uint32(parsed)
+	return uint32(any.ToUint64())
 }
 
 func (any *stringAny) ToUint64() uint64 {
-	parsed, _ := strconv.ParseUint(any.val, 10, 64)
+	if any.val == "" {
+		return 0
+	}
+
+	startPos := 0
+	endPos := 0
+
+	if any.val[0] == '-' {
+		return 0
+	}
+	if any.val[0] == '+' {
+		startPos = 1
+	}
+
+	for i := startPos; i < len(any.val); i++ {
+		if any.val[i] >= '0' && any.val[i] <= '9' {
+			endPos = i + 1
+		} else {
+			break
+		}
+	}
+	parsed, _ := strconv.ParseUint(any.val[startPos:endPos], 10, 64)
 	return parsed
 }
 
 func (any *stringAny) ToFloat32() float32 {
-	parsed, _ := strconv.ParseFloat(any.val, 32)
-	return float32(parsed)
+	return float32(any.ToFloat64())
 }
 
 func (any *stringAny) ToFloat64() float64 {
-	parsed, _ := strconv.ParseFloat(any.val, 64)
+	if len(any.val) == 0 {
+		return 0
+	}
+
+	// first char invalid
+	if any.val[0] != '+' && any.val[0] != '-' && (any.val[0] > '9' || any.val[0] < '0') {
+		return 0
+	}
+
+	// extract valid num expression from string
+	// eg 123true => 123, -12.12xxa => -12.12
+	endPos := 1
+	for i := 1; i < len(any.val); i++ {
+		if any.val[i] == '.' || any.val[i] == 'e' || any.val[i] == 'E' {
+			endPos = i + 1
+			continue
+		}
+
+		// end position is the first char which is not digit
+		if any.val[i] >= '0' && any.val[i] <= '9' {
+			endPos = i + 1
+		} else {
+			endPos = i
+			break
+		}
+	}
+	parsed, _ := strconv.ParseFloat(any.val[:endPos], 64)
 	return parsed
 }
 
diff --git a/feature_stream_float.go b/feature_stream_float.go
index 0b8e8a0..281370b 100644
--- a/feature_stream_float.go
+++ b/feature_stream_float.go
@@ -1,8 +1,8 @@
 package jsoniter
 
 import (
-	"strconv"
 	"math"
+	"strconv"
 )
 
 var _POW10 []uint64
diff --git a/fuzzy_mode_convert_table.md b/fuzzy_mode_convert_table.md
new file mode 100644
index 0000000..7f73c34
--- /dev/null
+++ b/fuzzy_mode_convert_table.md
@@ -0,0 +1,7 @@
+| json type \ dest type | bool | int | uint | float |string|
+| --- | --- | --- | --- |--|--|
+| number | positive => true <br/> negative => true <br/> zero => false| 23.2 => 23 <br/> -32.1 => -32| 12.1 => 12 <br/> -12.1 => 0|as normal||
+| string | empty string => false <br/> string "0" => false <br/> other strings => true | "123.32" => 123 <br/> "-123.4" => -123 <br/> "123.23xxxw" => 123 <br/>  "abcde12" => 0 <br/> "-32.1" => -32| 13.2 => 13 <br/> -1.1 => 0 |12.1 => 12.1 <br/> -12.3 => -12.3<br/> 12.4xxa => 12.4 <br/> +1.1e2 =>110 ||
+| bool | true => true <br/> false => false| true => 1 <br/> false => 0 | true => 1 <br/> false => 0 |true => 1 <br/>false => 0||
+| object | true | 0 | 0 |0||
+| array | empty array => false <br/> nonempty array => true| [] => 0 <br/> [1,2] => 1 | [] => 0 <br/> [1,2] => 1 |[] => 0<br/>[1,2] => 1||
\ No newline at end of file
diff --git a/jsoniter_1dot8_only_test.go b/jsoniter_1dot8_only_test.go
index 50f7a6a..e2154c4 100644
--- a/jsoniter_1dot8_only_test.go
+++ b/jsoniter_1dot8_only_test.go
@@ -3,11 +3,12 @@
 package jsoniter
 
 import (
-	"testing"
-	"encoding/json"
-	"github.com/json-iterator/go/require"
 	"bytes"
+	"encoding/json"
+	"testing"
 	"unicode/utf8"
+
+	"github.com/json-iterator/go/require"
 )
 
 func Test_new_encoder(t *testing.T) {
@@ -41,4 +42,4 @@ func Test_string_encode_with_std_without_html_escape(t *testing.T) {
 		jsoniterOutput := string(jsoniterOutputBytes)
 		should.Equal(stdOutput, jsoniterOutput)
 	}
-}
\ No newline at end of file
+}
diff --git a/jsoniter_any_array_test.go b/jsoniter_any_array_test.go
index 577745e..e888503 100644
--- a/jsoniter_any_array_test.go
+++ b/jsoniter_any_array_test.go
@@ -1,8 +1,9 @@
 package jsoniter
 
 import (
-	"github.com/json-iterator/go/require"
 	"testing"
+
+	"github.com/json-iterator/go/require"
 )
 
 func Test_read_empty_array_as_any(t *testing.T) {
@@ -46,10 +47,36 @@ func Test_read_two_element_array_as_any(t *testing.T) {
 	should.Equal([]int{1, 2}, arr)
 }
 
-func Test_wrap_array(t *testing.T) {
+func Test_wrap_array_and_convert_to_any(t *testing.T) {
 	should := require.New(t)
 	any := Wrap([]int{1, 2, 3})
+	any2 := Wrap([]int{})
+
 	should.Equal("[1,2,3]", any.ToString())
+	should.True(any.ToBool())
+	should.False(any2.ToBool())
+
+	should.Equal(1, any.ToInt())
+	should.Equal(0, any2.ToInt())
+	should.Equal(int32(1), any.ToInt32())
+	should.Equal(int32(0), any2.ToInt32())
+	should.Equal(int64(1), any.ToInt64())
+	should.Equal(int64(0), any2.ToInt64())
+	should.Equal(uint(1), any.ToUint())
+	should.Equal(uint(0), any2.ToUint())
+	should.Equal(uint32(1), any.ToUint32())
+	should.Equal(uint32(0), any2.ToUint32())
+	should.Equal(uint64(1), any.ToUint64())
+	should.Equal(uint64(0), any2.ToUint64())
+	should.Equal(float32(1), any.ToFloat32())
+	should.Equal(float32(0), any2.ToFloat32())
+	should.Equal(float64(1), any.ToFloat64())
+	should.Equal(float64(0), any2.ToFloat64())
+	should.Equal(3, any.Size())
+	should.Equal(0, any2.Size())
+
+	var i interface{} = []int{1, 2, 3}
+	should.Equal(i, any.GetInterface())
 }
 
 func Test_array_lazy_any_get(t *testing.T) {
diff --git a/jsoniter_any_bool_test.go b/jsoniter_any_bool_test.go
index 7344f4d..f6b09ee 100644
--- a/jsoniter_any_bool_test.go
+++ b/jsoniter_any_bool_test.go
@@ -1,12 +1,64 @@
 package jsoniter
 
 import (
-	"github.com/json-iterator/go/require"
+	"fmt"
 	"testing"
+
+	"github.com/json-iterator/go/require"
 )
 
+var boolConvertMap = map[string]bool{
+	"null":  false,
+	"true":  true,
+	"false": false,
+
+	`"true"`:  true,
+	`"false"`: true,
+
+	"123":   true,
+	`"123"`: true,
+	"0":     false,
+	`"0"`:   false,
+	"-1":    true,
+	`"-1"`:  true,
+
+	"1.1":       true,
+	"0.0":       false,
+	"-1.1":      true,
+	`""`:        false,
+	"[1,2]":     true,
+	"[]":        false,
+	"{}":        true,
+	`{"abc":1}`: true,
+}
+
 func Test_read_bool_as_any(t *testing.T) {
 	should := require.New(t)
-	any := Get([]byte("true"))
-	should.True(any.ToBool())
+
+	var any Any
+	for k, v := range boolConvertMap {
+		any = Get([]byte(k))
+		if v {
+			should.True(any.ToBool(), fmt.Sprintf("origin val is %v", k))
+		} else {
+			should.False(any.ToBool(), fmt.Sprintf("origin val is %v", k))
+		}
+	}
+
+}
+
+func Test_write_bool_to_stream(t *testing.T) {
+	should := require.New(t)
+	any := Get([]byte("true"))
+	stream := NewStream(ConfigDefault, nil, 32)
+	any.WriteTo(stream)
+	should.Equal("true", string(stream.Buffer()))
+	should.Equal(any.ValueType(), Bool)
+
+	any = Get([]byte("false"))
+	stream = NewStream(ConfigDefault, nil, 32)
+	any.WriteTo(stream)
+	should.Equal("false", string(stream.Buffer()))
+
+	should.Equal(any.ValueType(), Bool)
 }
diff --git a/jsoniter_any_float_test.go b/jsoniter_any_float_test.go
index 6606956..9e179b6 100644
--- a/jsoniter_any_float_test.go
+++ b/jsoniter_any_float_test.go
@@ -1,14 +1,74 @@
 package jsoniter
 
 import (
-	"github.com/json-iterator/go/require"
 	"testing"
+
+	"github.com/json-iterator/go/require"
 )
 
-func Test_read_float_as_any(t *testing.T) {
-	should := require.New(t)
-	any := Get([]byte("12.3"))
-	should.Equal(float64(12.3), any.ToFloat64())
-	should.Equal("12.3", any.ToString())
-	should.True(any.ToBool())
+var floatConvertMap = map[string]float64{
+	"null":  0,
+	"true":  1,
+	"false": 0,
+
+	`"true"`:  0,
+	`"false"`: 0,
+
+	"123":       123,
+	`"123true"`: 123,
+	`"+"`:       0,
+	`"-"`:       0,
+
+	`"-123true"`:  -123,
+	`"-99.9true"`: -99.9,
+	"0":           0,
+	`"0"`:         0,
+	"-1":          -1,
+
+	"1.1":       1.1,
+	"0.0":       0,
+	"-1.1":      -1.1,
+	`"+1.1"`:    1.1,
+	`""`:        0,
+	"[1,2]":     1,
+	"[]":        0,
+	"{}":        0,
+	`{"abc":1}`: 0,
+}
+
+func Test_read_any_to_float(t *testing.T) {
+	should := require.New(t)
+	for k, v := range floatConvertMap {
+		any := Get([]byte(k))
+		should.Equal(float64(v), any.ToFloat64(), "the original val is "+k)
+	}
+
+	for k, v := range floatConvertMap {
+		any := Get([]byte(k))
+		should.Equal(float32(v), any.ToFloat32(), "the original val is "+k)
+	}
+}
+
+func Test_read_float_to_any(t *testing.T) {
+	should := require.New(t)
+	any := WrapFloat64(12.3)
+	anyFloat64 := float64(12.3)
+	//negaAnyFloat64 := float64(-1.1)
+	any2 := WrapFloat64(-1.1)
+	should.Equal(float64(12.3), any.ToFloat64())
+	//should.Equal("12.3", any.ToString())
+	should.True(any.ToBool())
+	should.Equal(float32(anyFloat64), any.ToFloat32())
+	should.Equal(int(anyFloat64), any.ToInt())
+	should.Equal(int32(anyFloat64), any.ToInt32())
+	should.Equal(int64(anyFloat64), any.ToInt64())
+	should.Equal(uint(anyFloat64), any.ToUint())
+	should.Equal(uint32(anyFloat64), any.ToUint32())
+	should.Equal(uint64(anyFloat64), any.ToUint64())
+	should.Equal(uint(0), any2.ToUint())
+	should.Equal(uint32(0), any2.ToUint32())
+	should.Equal(uint64(0), any2.ToUint64())
+	should.Equal(any.ValueType(), Number)
+
+	should.Equal("1.23E+01", any.ToString())
 }
diff --git a/jsoniter_any_int_test.go b/jsoniter_any_int_test.go
index b19f4f9..f8b9518 100644
--- a/jsoniter_any_int_test.go
+++ b/jsoniter_any_int_test.go
@@ -1,22 +1,197 @@
 package jsoniter
 
 import (
-	"github.com/json-iterator/go/require"
-	"io"
+	"fmt"
 	"testing"
+
+	"github.com/json-iterator/go/require"
 )
 
-func Test_read_int64_as_any(t *testing.T) {
+var intConvertMap = map[string]int{
+	"null":       0,
+	"321.1":      321,
+	"-321.1":     -321,
+	`"1.1"`:      1,
+	`"-321.1"`:   -321,
+	"0.0":        0,
+	"0":          0,
+	`"0"`:        0,
+	`"0.0"`:      0,
+	"-1.1":       -1,
+	"true":       1,
+	"false":      0,
+	`"true"`:     0,
+	`"false"`:    0,
+	`"true123"`:  0,
+	`"123true"`:  123,
+	`"-123true"`: -123,
+	`"1.2332e6"`: 1,
+	`""`:         0,
+	"+":          0,
+	"-":          0,
+	"[]":         0,
+	"[1,2]":      1,
+	`["1","2"]`:  1,
+	// object in php cannot convert to int
+	"{}": 0,
+}
+
+func Test_read_any_to_int(t *testing.T) {
 	should := require.New(t)
-	any := Get([]byte("1234"))
-	should.Equal(1234, any.ToInt())
-	should.Equal(io.EOF, any.LastError())
-	should.Equal("1234", any.ToString())
-	should.True(any.ToBool())
+
+	// int
+	for k, v := range intConvertMap {
+		any := Get([]byte(k))
+		should.Equal(v, any.ToInt(), fmt.Sprintf("origin val %v", k))
+	}
+
+	// int32
+	for k, v := range intConvertMap {
+		any := Get([]byte(k))
+		should.Equal(int32(v), any.ToInt32(), fmt.Sprintf("original val is %v", k))
+	}
+
+	// int64
+	for k, v := range intConvertMap {
+		any := Get([]byte(k))
+		should.Equal(int64(v), any.ToInt64(), fmt.Sprintf("original val is %v", k))
+	}
+
+}
+
+var uintConvertMap = map[string]int{
+	"null":       0,
+	"321.1":      321,
+	`"1.1"`:      1,
+	`"-123.1"`:   0,
+	"0.0":        0,
+	"0":          0,
+	`"0"`:        0,
+	`"0.0"`:      0,
+	`"00.0"`:     0,
+	"true":       1,
+	"false":      0,
+	`"true"`:     0,
+	`"false"`:    0,
+	`"true123"`:  0,
+	`"+1"`:       1,
+	`"123true"`:  123,
+	`"-123true"`: 0,
+	`"1.2332e6"`: 1,
+	`""`:         0,
+	"+":          0,
+	"-":          0,
+	".":          0,
+	"[]":         0,
+	"[1,2]":      1,
+	"{}":         0,
+	"{1,2}":      0,
+	"-1.1":       0,
+	"-321.1":     0,
+}
+
+func Test_read_any_to_uint(t *testing.T) {
+	should := require.New(t)
+
+	for k, v := range uintConvertMap {
+		any := Get([]byte(k))
+		should.Equal(uint64(v), any.ToUint64(), fmt.Sprintf("origin val %v", k))
+	}
+
+	for k, v := range uintConvertMap {
+		any := Get([]byte(k))
+		should.Equal(uint32(v), any.ToUint32(), fmt.Sprintf("origin val %v", k))
+	}
+
+	for k, v := range uintConvertMap {
+		any := Get([]byte(k))
+		should.Equal(uint(v), any.ToUint(), fmt.Sprintf("origin val %v", k))
+	}
+
+}
+
+func Test_read_int64_to_any(t *testing.T) {
+	should := require.New(t)
+	any := WrapInt64(12345)
+	should.Equal(12345, any.ToInt())
+	should.Equal(int32(12345), any.ToInt32())
+	should.Equal(int64(12345), any.ToInt64())
+	should.Equal(uint(12345), any.ToUint())
+	should.Equal(uint32(12345), any.ToUint32())
+	should.Equal(uint64(12345), any.ToUint64())
+	should.Equal(float32(12345), any.ToFloat32())
+	should.Equal(float64(12345), any.ToFloat64())
+	should.Equal("12345", any.ToString())
+	should.Equal(true, any.ToBool())
+	should.Equal(any.ValueType(), Number)
+	stream := NewStream(ConfigDefault, nil, 32)
+	any.WriteTo(stream)
+	should.Equal("12345", string(stream.Buffer()))
+}
+func Test_read_int32_to_any(t *testing.T) {
+	should := require.New(t)
+	any := WrapInt32(12345)
+	should.Equal(12345, any.ToInt())
+	should.Equal(int32(12345), any.ToInt32())
+	should.Equal(int64(12345), any.ToInt64())
+	should.Equal(uint(12345), any.ToUint())
+	should.Equal(uint32(12345), any.ToUint32())
+	should.Equal(uint64(12345), any.ToUint64())
+	should.Equal(float32(12345), any.ToFloat32())
+	should.Equal(float64(12345), any.ToFloat64())
+	should.Equal("12345", any.ToString())
+	should.Equal(true, any.ToBool())
+	should.Equal(any.ValueType(), Number)
+	stream := NewStream(ConfigDefault, nil, 32)
+	any.WriteTo(stream)
+	should.Equal("12345", string(stream.Buffer()))
+}
+
+func Test_read_uint32_to_any(t *testing.T) {
+	should := require.New(t)
+	any := WrapUint32(12345)
+	should.Equal(12345, any.ToInt())
+	should.Equal(int32(12345), any.ToInt32())
+	should.Equal(int64(12345), any.ToInt64())
+	should.Equal(uint(12345), any.ToUint())
+	should.Equal(uint32(12345), any.ToUint32())
+	should.Equal(uint64(12345), any.ToUint64())
+	should.Equal(float32(12345), any.ToFloat32())
+	should.Equal(float64(12345), any.ToFloat64())
+	should.Equal("12345", any.ToString())
+	should.Equal(true, any.ToBool())
+	should.Equal(any.ValueType(), Number)
+	stream := NewStream(ConfigDefault, nil, 32)
+	any.WriteTo(stream)
+	should.Equal("12345", string(stream.Buffer()))
+}
+
+func Test_read_uint64_to_any(t *testing.T) {
+	should := require.New(t)
+	any := WrapUint64(12345)
+	should.Equal(12345, any.ToInt())
+	should.Equal(int32(12345), any.ToInt32())
+	should.Equal(int64(12345), any.ToInt64())
+	should.Equal(uint(12345), any.ToUint())
+	should.Equal(uint32(12345), any.ToUint32())
+	should.Equal(uint64(12345), any.ToUint64())
+	should.Equal(float32(12345), any.ToFloat32())
+	should.Equal(float64(12345), any.ToFloat64())
+	should.Equal("12345", any.ToString())
+	should.Equal(true, any.ToBool())
+	should.Equal(any.ValueType(), Number)
+	stream := NewStream(ConfigDefault, nil, 32)
+	any.WriteTo(stream)
+	should.Equal("12345", string(stream.Buffer()))
+	stream = NewStream(ConfigDefault, nil, 32)
+	stream.WriteUint(uint(123))
+	should.Equal("123", string(stream.Buffer()))
 }
 
 func Test_int_lazy_any_get(t *testing.T) {
 	should := require.New(t)
 	any := Get([]byte("1234"))
+	// panic!!
+	//should.Equal(any.LastError(), io.EOF)
 	should.Equal(Invalid, any.Get(1, "2").ValueType())
 }
diff --git a/jsoniter_any_object_test.go b/jsoniter_any_object_test.go
index 4c85f4d..2ce141b 100644
--- a/jsoniter_any_object_test.go
+++ b/jsoniter_any_object_test.go
@@ -1,8 +1,9 @@
 package jsoniter
 
 import (
-	"github.com/json-iterator/go/require"
 	"testing"
+
+	"github.com/json-iterator/go/require"
 )
 
 func Test_read_object_as_any(t *testing.T) {
@@ -18,7 +19,7 @@ func Test_read_object_as_any(t *testing.T) {
 	should.Equal(2, len(any.Keys()))
 	should.Equal(2, any.Size())
 	should.True(any.ToBool())
-	should.Equal(1, any.ToInt())
+	should.Equal(0, any.ToInt())
 	should.Equal(Object, any.ValueType())
 	should.Nil(any.LastError())
 	should.Equal("b", any.GetObject()["a"].ToString())
@@ -48,7 +49,21 @@ func Test_object_lazy_any_get_invalid(t *testing.T) {
 	should.Equal(Invalid, any.Get(1).ValueType())
 }
 
-func Test_wrap_object(t *testing.T) {
+func Test_wrap_map_and_convert_to_any(t *testing.T) {
+	should := require.New(t)
+	any := Wrap(map[string]interface{}{"a": 1})
+	should.True(any.ToBool())
+	should.Equal(0, any.ToInt())
+	should.Equal(int32(0), any.ToInt32())
+	should.Equal(int64(0), any.ToInt64())
+	should.Equal(float32(0), any.ToFloat32())
+	should.Equal(float64(0), any.ToFloat64())
+	should.Equal(uint(0), any.ToUint())
+	should.Equal(uint32(0), any.ToUint32())
+	should.Equal(uint64(0), any.ToUint64())
+}
+
+func Test_wrap_object_and_convert_to_any(t *testing.T) {
 	should := require.New(t)
 	type TestObject struct {
 		Field1 string
@@ -59,6 +74,24 @@ func Test_wrap_object(t *testing.T) {
 	any = Wrap(TestObject{"hello", "world"})
 	should.Equal(2, any.Size())
 	should.Equal(`{"Field1":"hello"}`, any.Get('*').ToString())
+
+	should.Equal(0, any.ToInt())
+	should.Equal(int32(0), any.ToInt32())
+	should.Equal(int64(0), any.ToInt64())
+	should.Equal(float32(0), any.ToFloat32())
+	should.Equal(float64(0), any.ToFloat64())
+	should.Equal(uint(0), any.ToUint())
+	should.Equal(uint32(0), any.ToUint32())
+	should.Equal(uint64(0), any.ToUint64())
+	should.True(any.ToBool())
+	should.Equal(`{"Field1":"hello"}`, any.ToString())
+
+	// cannot pass!
+	//stream := NewStream(ConfigDefault, nil, 32)
+	//any.WriteTo(stream)
+	//should.Equal(`{"Field1":"hello"}`, string(stream.Buffer()))
+	// cannot pass!
+
 }
 
 func Test_any_within_struct(t *testing.T) {
diff --git a/jsoniter_any_string_test.go b/jsoniter_any_string_test.go
index f17a111..9512e05 100644
--- a/jsoniter_any_string_test.go
+++ b/jsoniter_any_string_test.go
@@ -1,10 +1,42 @@
 package jsoniter
 
 import (
-	"github.com/json-iterator/go/require"
 	"testing"
+
+	"github.com/json-iterator/go/require"
 )
 
+var stringConvertMap = map[string]string{
+	"null":              "",
+	"321.1":             "321.1",
+	`"1.1"`:             "1.1",
+	`"-123.1"`:          "-123.1",
+	"0.0":               "0.0",
+	"0":                 "0",
+	`"0"`:               "0",
+	`"0.0"`:             "0.0",
+	`"00.0"`:            "00.0",
+	"true":              "true",
+	"false":             "false",
+	`"true"`:            "true",
+	`"false"`:           "false",
+	`"true123"`:         "true123",
+	`"+1"`:              "+1",
+	"[]":                "[]",
+	"[1,2]":             "[1,2]",
+	"{}":                "{}",
+	"{1,2}":             "{1,2}",
+	`{"a":1, "b":true}`: `{"a":1, "b":true}`,
+}
+
+func Test_read_any_to_string(t *testing.T) {
+	should := require.New(t)
+	for k, v := range stringConvertMap {
+		any := Get([]byte(k))
+		should.Equal(v, any.ToString(), "original val "+k)
+	}
+}
+
 func Test_read_string_as_any(t *testing.T) {
 	should := require.New(t)
 	any := Get([]byte(`"hello"`))
@@ -13,7 +45,7 @@ func Test_read_string_as_any(t *testing.T) {
 	any = Get([]byte(`" "`))
 	should.False(any.ToBool())
 	any = Get([]byte(`"false"`))
-	should.False(any.ToBool())
+	should.True(any.ToBool())
 	any = Get([]byte(`"123"`))
 	should.Equal(123, any.ToInt())
 }
diff --git a/jsoniter_bool_test.go b/jsoniter_bool_test.go
index 41d4a3a..771f514 100644
--- a/jsoniter_bool_test.go
+++ b/jsoniter_bool_test.go
@@ -3,8 +3,9 @@ package jsoniter
 import (
 	"bytes"
 	"encoding/json"
-	"github.com/json-iterator/go/require"
 	"testing"
+
+	"github.com/json-iterator/go/require"
 )
 
 func Test_true(t *testing.T) {
@@ -27,9 +28,10 @@ func Test_write_true_false(t *testing.T) {
 	stream := NewStream(ConfigDefault, buf, 4096)
 	stream.WriteTrue()
 	stream.WriteFalse()
+	stream.WriteBool(false)
 	stream.Flush()
 	should.Nil(stream.Error)
-	should.Equal("truefalse", buf.String())
+	should.Equal("truefalsefalse", buf.String())
 }
 
 func Test_write_val_bool(t *testing.T) {
@@ -37,7 +39,9 @@ func Test_write_val_bool(t *testing.T) {
 	buf := &bytes.Buffer{}
 	stream := NewStream(ConfigDefault, buf, 4096)
 	stream.WriteVal(true)
+	should.Equal(stream.Buffered(), 4)
 	stream.Flush()
+	should.Equal(stream.Buffered(), 0)
 	should.Nil(stream.Error)
 	should.Equal("true", buf.String())
 }
diff --git a/jsoniter_demo_test.go b/jsoniter_demo_test.go
index 92fa02c..5c49268 100644
--- a/jsoniter_demo_test.go
+++ b/jsoniter_demo_test.go
@@ -2,9 +2,9 @@ package jsoniter
 
 import (
 	"encoding/json"
-	"fmt"
-	"github.com/json-iterator/go/require"
 	"testing"
+
+	"github.com/json-iterator/go/require"
 )
 
 func Test_bind_api_demo(t *testing.T) {
@@ -21,7 +21,7 @@ func Test_iterator_api_demo(t *testing.T) {
 	for iter.ReadArray() {
 		total += iter.ReadInt()
 	}
-	fmt.Println(total)
+	//fmt.Println(total)
 }
 
 type People struct {
diff --git a/jsoniter_float_test.go b/jsoniter_float_test.go
index 547c2d6..8895346 100644
--- a/jsoniter_float_test.go
+++ b/jsoniter_float_test.go
@@ -6,9 +6,10 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"github.com/json-iterator/go/require"
 	"strconv"
 	"testing"
+
+	"github.com/json-iterator/go/require"
 )
 
 func Test_read_big_float(t *testing.T) {
@@ -111,6 +112,10 @@ func Test_write_float32(t *testing.T) {
 	stream.Flush()
 	should.Nil(stream.Error)
 	should.Equal("abcdefg1.123456", buf.String())
+
+	stream = NewStream(ConfigDefault, nil, 0)
+	stream.WriteFloat32(float32(0.0000001))
+	should.Equal("1e-07", string(stream.buf))
 }
 
 func Test_write_float64(t *testing.T) {
@@ -144,6 +149,10 @@ func Test_write_float64(t *testing.T) {
 	stream.Flush()
 	should.Nil(stream.Error)
 	should.Equal("abcdefg1.123456", buf.String())
+
+	stream = NewStream(ConfigDefault, nil, 0)
+	stream.WriteFloat64(float64(0.0000001))
+	should.Equal("1e-07", string(stream.buf))
 }
 
 func Test_read_float64_cursor(t *testing.T) {
diff --git a/jsoniter_invalid_test.go b/jsoniter_invalid_test.go
index e764b57..358143b 100644
--- a/jsoniter_invalid_test.go
+++ b/jsoniter_invalid_test.go
@@ -19,3 +19,25 @@ func Test_missing_array_end(t *testing.T) {
 	should := require.New(t)
 	should.NotNil(UnmarshalFromString(`[1,2,3`, &[]int{}))
 }
+
+func Test_invalid_any(t *testing.T) {
+	should := require.New(t)
+	any := Get([]byte("[]"))
+	should.Equal(Invalid, any.Get(0.3).ValueType())
+	// is nil correct ?
+	should.Equal(nil, any.Get(0.3).GetInterface())
+
+	any = any.Get(0.3)
+	should.Equal(false, any.ToBool())
+	should.Equal(int(0), any.ToInt())
+	should.Equal(int32(0), any.ToInt32())
+	should.Equal(int64(0), any.ToInt64())
+	should.Equal(uint(0), any.ToUint())
+	should.Equal(uint32(0), any.ToUint32())
+	should.Equal(uint64(0), any.ToUint64())
+	should.Equal(float32(0), any.ToFloat32())
+	should.Equal(float64(0), any.ToFloat64())
+	should.Equal("", any.ToString())
+
+	should.Equal(Invalid, any.Get(0.1).Get(1).ValueType())
+}
diff --git a/jsoniter_map_test.go b/jsoniter_map_test.go
index 794bcb1..378165b 100644
--- a/jsoniter_map_test.go
+++ b/jsoniter_map_test.go
@@ -2,9 +2,10 @@ package jsoniter
 
 import (
 	"encoding/json"
-	"github.com/json-iterator/go/require"
 	"math/big"
 	"testing"
+
+	"github.com/json-iterator/go/require"
 )
 
 func Test_read_map(t *testing.T) {
@@ -30,6 +31,14 @@ func Test_map_wrapper_any_get_all(t *testing.T) {
 	should := require.New(t)
 	any := Wrap(map[string][]int{"Field1": {1, 2}})
 	should.Equal(`{"Field1":1}`, any.Get('*', 0).ToString())
+	should.Contains(any.Keys(), "Field1")
+	should.Equal(any.GetObject()["Field1"].ToInt(), 1)
+
+	// map write to
+	stream := NewStream(ConfigDefault, nil, 0)
+	any.WriteTo(stream)
+	// TODO cannot pass
+	//should.Equal(string(stream.buf), "")
 }
 
 func Test_write_val_map(t *testing.T) {
diff --git a/jsoniter_must_be_valid_test.go b/jsoniter_must_be_valid_test.go
new file mode 100644
index 0000000..01c6e44
--- /dev/null
+++ b/jsoniter_must_be_valid_test.go
@@ -0,0 +1,71 @@
+package jsoniter
+
+import (
+	"testing"
+
+	"github.com/json-iterator/go/require"
+)
+
+// if must be valid is useless, just drop this test
+func Test_must_be_valid(t *testing.T) {
+	should := require.New(t)
+	any := Get([]byte("123"))
+	should.Equal(any.MustBeValid().ToInt(), 123)
+
+	any = Wrap(int8(10))
+	should.Equal(any.MustBeValid().ToInt(), 10)
+
+	any = Wrap(int16(10))
+	should.Equal(any.MustBeValid().ToInt(), 10)
+
+	any = Wrap(int32(10))
+	should.Equal(any.MustBeValid().ToInt(), 10)
+
+	any = Wrap(int64(10))
+	should.Equal(any.MustBeValid().ToInt(), 10)
+
+	any = Wrap(uint(10))
+	should.Equal(any.MustBeValid().ToInt(), 10)
+
+	any = Wrap(uint8(10))
+	should.Equal(any.MustBeValid().ToInt(), 10)
+
+	any = Wrap(uint16(10))
+	should.Equal(any.MustBeValid().ToInt(), 10)
+
+	any = Wrap(uint32(10))
+	should.Equal(any.MustBeValid().ToInt(), 10)
+
+	any = Wrap(uint64(10))
+	should.Equal(any.MustBeValid().ToInt(), 10)
+
+	any = Wrap(float32(10))
+	should.Equal(any.MustBeValid().ToFloat64(), float64(10))
+
+	any = Wrap(float64(10))
+	should.Equal(any.MustBeValid().ToFloat64(), float64(10))
+
+	any = Wrap(true)
+	should.Equal(any.MustBeValid().ToFloat64(), float64(1))
+
+	any = Wrap(false)
+	should.Equal(any.MustBeValid().ToFloat64(), float64(0))
+
+	any = Wrap(nil)
+	should.Equal(any.MustBeValid().ToFloat64(), float64(0))
+
+	any = Wrap(struct{ age int }{age: 1})
+	should.Equal(any.MustBeValid().ToFloat64(), float64(0))
+
+	any = Wrap(map[string]interface{}{"abc": 1})
+	should.Equal(any.MustBeValid().ToFloat64(), float64(0))
+
+	any = Wrap("abc")
+	should.Equal(any.MustBeValid().ToFloat64(), float64(0))
+
+	any = Wrap([]int{})
+	should.Equal(any.MustBeValid().ToFloat64(), float64(0))
+
+	any = Wrap([]int{1, 2})
+	should.Equal(any.MustBeValid().ToFloat64(), float64(1))
+}
diff --git a/jsoniter_object_test.go b/jsoniter_object_test.go
index 9c5e532..9599b6a 100644
--- a/jsoniter_object_test.go
+++ b/jsoniter_object_test.go
@@ -3,8 +3,9 @@ package jsoniter
 import (
 	"bytes"
 	"fmt"
-	"github.com/json-iterator/go/require"
 	"testing"
+
+	"github.com/json-iterator/go/require"
 )
 
 func Test_empty_object(t *testing.T) {
@@ -33,6 +34,7 @@ func Test_one_field(t *testing.T) {
 		should.Equal("a", field)
 		return true
 	}))
+
 }
 
 func Test_two_field(t *testing.T) {
@@ -69,6 +71,11 @@ func Test_object_wrapper_any_get_all(t *testing.T) {
 	}
 	any := Wrap(TestObject{[]int{1, 2}, []int{3, 4}})
 	should.Contains(any.Get('*', 0).ToString(), `"Field2":3`)
+	should.Contains(any.Keys(), "Field1")
+	should.Contains(any.Keys(), "Field2")
+	should.NotContains(any.Keys(), "Field3")
+
+	//should.Contains(any.GetObject()["Field1"].GetArray()[0], 1)
 }
 
 func Test_write_object(t *testing.T) {
@@ -167,6 +174,106 @@ func Test_decode_five_fields_struct(t *testing.T) {
 	should.Equal("e", obj.Field5)
 }
 
+func Test_decode_six_fields_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 string
+		Field2 string
+		Field3 string
+		Field4 string
+		Field5 string
+		Field6 string
+	}
+	obj := TestObject{}
+	should.Nil(UnmarshalFromString(`{}`, &obj))
+	should.Equal("", obj.Field1)
+	should.Nil(UnmarshalFromString(`{"Field1": "a", "Field2": "b", "Field3": "c", "Field4": "d", "Field5": "e", "Field6": "x"}`, &obj))
+	should.Equal("a", obj.Field1)
+	should.Equal("b", obj.Field2)
+	should.Equal("c", obj.Field3)
+	should.Equal("d", obj.Field4)
+	should.Equal("e", obj.Field5)
+	should.Equal("x", obj.Field6)
+}
+
+func Test_decode_seven_fields_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 string
+		Field2 string
+		Field3 string
+		Field4 string
+		Field5 string
+		Field6 string
+		Field7 string
+	}
+	obj := TestObject{}
+	should.Nil(UnmarshalFromString(`{}`, &obj))
+	should.Equal("", obj.Field1)
+	should.Nil(UnmarshalFromString(`{"Field1": "a", "Field2": "b", "Field3": "c", "Field4": "d", "Field5": "e", "Field6": "x", "Field7":"y"}`, &obj))
+	should.Equal("a", obj.Field1)
+	should.Equal("b", obj.Field2)
+	should.Equal("c", obj.Field3)
+	should.Equal("d", obj.Field4)
+	should.Equal("e", obj.Field5)
+	should.Equal("x", obj.Field6)
+	should.Equal("y", obj.Field7)
+}
+
+func Test_decode_eight_fields_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 string
+		Field2 string
+		Field3 string
+		Field4 string
+		Field5 string
+		Field6 string
+		Field7 string
+		Field8 string
+	}
+	obj := TestObject{}
+	should.Nil(UnmarshalFromString(`{}`, &obj))
+	should.Equal("", obj.Field1)
+	should.Nil(UnmarshalFromString(`{"Field8":"1", "Field1": "a", "Field2": "b", "Field3": "c", "Field4": "d", "Field5": "e", "Field6": "x", "Field7":"y"}`, &obj))
+	should.Equal("a", obj.Field1)
+	should.Equal("b", obj.Field2)
+	should.Equal("c", obj.Field3)
+	should.Equal("d", obj.Field4)
+	should.Equal("e", obj.Field5)
+	should.Equal("x", obj.Field6)
+	should.Equal("y", obj.Field7)
+	should.Equal("1", obj.Field8)
+}
+
+func Test_decode_nine_fields_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 string
+		Field2 string
+		Field3 string
+		Field4 string
+		Field5 string
+		Field6 string
+		Field7 string
+		Field8 string
+		Field9 string
+	}
+	obj := TestObject{}
+	should.Nil(UnmarshalFromString(`{}`, &obj))
+	should.Equal("", obj.Field1)
+	should.Nil(UnmarshalFromString(`{"Field8" : "zzzzzzzzzzz", "Field7": "zz", "Field6" : "xx", "Field1": "a", "Field2": "b", "Field3": "c", "Field4": "d", "Field5": "e", "Field9":"f"}`, &obj))
+	should.Equal("a", obj.Field1)
+	should.Equal("b", obj.Field2)
+	should.Equal("c", obj.Field3)
+	should.Equal("d", obj.Field4)
+	should.Equal("e", obj.Field5)
+	should.Equal("xx", obj.Field6)
+	should.Equal("zz", obj.Field7)
+	should.Equal("zzzzzzzzzzz", obj.Field8)
+	should.Equal("f", obj.Field9)
+}
+
 func Test_decode_ten_fields_struct(t *testing.T) {
 	should := require.New(t)
 	type TestObject struct {
@@ -184,12 +291,44 @@ func Test_decode_ten_fields_struct(t *testing.T) {
 	obj := TestObject{}
 	should.Nil(UnmarshalFromString(`{}`, &obj))
 	should.Equal("", obj.Field1)
-	should.Nil(UnmarshalFromString(`{"Field1": "a", "Field2": "b", "Field3": "c", "Field4": "d", "Field5": "e"}`, &obj))
+	should.Nil(UnmarshalFromString(`{"Field10":"x", "Field9": "x", "Field8":"x", "Field7":"x", "Field6":"x", "Field1": "a", "Field2": "b", "Field3": "c", "Field4": "d", "Field5": "e"}`, &obj))
 	should.Equal("a", obj.Field1)
 	should.Equal("b", obj.Field2)
 	should.Equal("c", obj.Field3)
 	should.Equal("d", obj.Field4)
 	should.Equal("e", obj.Field5)
+	should.Equal("x", obj.Field6)
+	should.Equal("x", obj.Field7)
+	should.Equal("x", obj.Field8)
+	should.Equal("x", obj.Field9)
+	should.Equal("x", obj.Field10)
+}
+
+func Test_decode_more_than_ten_fields_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1  string
+		Field2  string
+		Field3  string
+		Field4  string
+		Field5  string
+		Field6  string
+		Field7  string
+		Field8  string
+		Field9  string
+		Field10 string
+		Field11 int
+	}
+	obj := TestObject{}
+	should.Nil(UnmarshalFromString(`{}`, &obj))
+	should.Equal("", obj.Field1)
+	should.Nil(UnmarshalFromString(`{"Field11":1, "Field1": "a", "Field2": "b", "Field3": "c", "Field4": "d", "Field5": "e"}`, &obj))
+	should.Equal("a", obj.Field1)
+	should.Equal("b", obj.Field2)
+	should.Equal("c", obj.Field3)
+	should.Equal("d", obj.Field4)
+	should.Equal("e", obj.Field5)
+	should.Equal(1, obj.Field11)
 }
 
 func Test_decode_struct_field_with_tag(t *testing.T) {
@@ -381,7 +520,7 @@ func Test_shadow_struct_field(t *testing.T) {
 	should.Contains(output, `"max_age":20`)
 }
 
-func Test_embeded_order(t *testing.T) {
+func Test_embedded_order(t *testing.T) {
 	type A struct {
 		Field2 string
 	}
diff --git a/jsoniter_skip_test.go b/jsoniter_skip_test.go
index c789a98..1212f95 100644
--- a/jsoniter_skip_test.go
+++ b/jsoniter_skip_test.go
@@ -3,8 +3,9 @@ package jsoniter
 import (
 	"bytes"
 	"encoding/json"
-	"github.com/json-iterator/go/require"
 	"testing"
+
+	"github.com/json-iterator/go/require"
 )
 
 func Test_skip_number(t *testing.T) {
@@ -15,6 +16,7 @@ func Test_skip_number(t *testing.T) {
 	if iter.ReadString() != "b" {
 		t.FailNow()
 	}
+
 }
 
 func Test_skip_null(t *testing.T) {
diff --git a/jsoniter_wrap_test.go b/jsoniter_wrap_test.go
new file mode 100644
index 0000000..117a0e2
--- /dev/null
+++ b/jsoniter_wrap_test.go
@@ -0,0 +1,118 @@
+package jsoniter
+
+import (
+	"testing"
+
+	"github.com/json-iterator/go/require"
+)
+
+func Test_wrap_and_valuetype_everything(t *testing.T) {
+	should := require.New(t)
+	var i interface{}
+	any := Get([]byte("123"))
+	// default of number type is float64
+	i = float64(123)
+	should.Equal(i, any.GetInterface())
+
+	any = Wrap(int8(10))
+	should.Equal(any.ValueType(), Number)
+	should.Equal(any.LastError(), nil)
+	//  get interface is not int8 interface
+	// i = int8(10)
+	// should.Equal(i, any.GetInterface())
+
+	any = Wrap(int16(10))
+	should.Equal(any.ValueType(), Number)
+	should.Equal(any.LastError(), nil)
+	//i = int16(10)
+	//should.Equal(i, any.GetInterface())
+
+	any = Wrap(int32(10))
+	should.Equal(any.ValueType(), Number)
+	should.Equal(any.LastError(), nil)
+	i = int32(10)
+	should.Equal(i, any.GetInterface())
+	any = Wrap(int64(10))
+	should.Equal(any.ValueType(), Number)
+	should.Equal(any.LastError(), nil)
+	i = int64(10)
+	should.Equal(i, any.GetInterface())
+
+	any = Wrap(uint(10))
+	should.Equal(any.ValueType(), Number)
+	should.Equal(any.LastError(), nil)
+	// not equal
+	//i = uint(10)
+	//should.Equal(i, any.GetInterface())
+	any = Wrap(uint8(10))
+	should.Equal(any.ValueType(), Number)
+	should.Equal(any.LastError(), nil)
+	// not equal
+	// i = uint8(10)
+	// should.Equal(i, any.GetInterface())
+	any = Wrap(uint16(10))
+	should.Equal(any.ValueType(), Number)
+	should.Equal(any.LastError(), nil)
+	any = Wrap(uint32(10))
+	should.Equal(any.ValueType(), Number)
+	should.Equal(any.LastError(), nil)
+	i = uint32(10)
+	should.Equal(i, any.GetInterface())
+	any = Wrap(uint64(10))
+	should.Equal(any.ValueType(), Number)
+	should.Equal(any.LastError(), nil)
+	i = uint64(10)
+	should.Equal(i, any.GetInterface())
+
+	any = Wrap(float32(10))
+	should.Equal(any.ValueType(), Number)
+	should.Equal(any.LastError(), nil)
+	// not equal
+	//i = float32(10)
+	//should.Equal(i, any.GetInterface())
+	any = Wrap(float64(10))
+	should.Equal(any.ValueType(), Number)
+	should.Equal(any.LastError(), nil)
+	i = float64(10)
+	should.Equal(i, any.GetInterface())
+
+	any = Wrap(true)
+	should.Equal(any.ValueType(), Bool)
+	should.Equal(any.LastError(), nil)
+	i = true
+	should.Equal(i, any.GetInterface())
+	any = Wrap(false)
+	should.Equal(any.ValueType(), Bool)
+	should.Equal(any.LastError(), nil)
+	i = false
+	should.Equal(i, any.GetInterface())
+
+	any = Wrap(nil)
+	should.Equal(any.ValueType(), Nil)
+	should.Equal(any.LastError(), nil)
+	i = nil
+	should.Equal(i, any.GetInterface())
+
+	stream := NewStream(ConfigDefault, nil, 32)
+	any.WriteTo(stream)
+	should.Equal("null", string(stream.Buffer()))
+	should.Equal(any.LastError(), nil)
+
+	any = Wrap(struct{ age int }{age: 1})
+	should.Equal(any.ValueType(), Object)
+	should.Equal(any.LastError(), nil)
+	i = struct{ age int }{age: 1}
+	should.Equal(i, any.GetInterface())
+
+	any = Wrap(map[string]interface{}{"abc": 1})
+	should.Equal(any.ValueType(), Object)
+	should.Equal(any.LastError(), nil)
+	i = map[string]interface{}{"abc": 1}
+	should.Equal(i, any.GetInterface())
+
+	any = Wrap("abc")
+	i = "abc"
+	should.Equal(i, any.GetInterface())
+	should.Equal(nil, any.LastError())
+
+}