// Copyright 2009 The Go 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 reflectlite_test
import (
"encoding/base64"
"fmt"
. "internal/reflectlite"
"math"
"reflect"
"runtime"
"testing"
"unsafe"
)
func ToValue(v Value) reflect.Value {
return reflect.ValueOf(ToInterface(v))
}
func TypeString(t Type) string {
return fmt.Sprintf("%T", ToInterface(Zero(t)))
}
type integer int
type T struct {
a int
b float64
c string
d *int
}
type pair struct {
i interface{}
s string
}
func assert(t *testing.T, s, want string) {
t.Helper()
if s != want {
t.Errorf("have %#q want %#q", s, want)
}
}
var typeTests = []pair{
{struct{ x int }{}, "int"},
{struct{ x int8 }{}, "int8"},
{struct{ x int16 }{}, "int16"},
{struct{ x int32 }{}, "int32"},
{struct{ x int64 }{}, "int64"},
{struct{ x uint }{}, "uint"},
{struct{ x uint8 }{}, "uint8"},
{struct{ x uint16 }{}, "uint16"},
{struct{ x uint32 }{}, "uint32"},
{struct{ x uint64 }{}, "uint64"},
{struct{ x float32 }{}, "float32"},
{struct{ x float64 }{}, "float64"},
{struct{ x int8 }{}, "int8"},
{struct{ x (**int8) }{}, "**int8"},
{struct{ x (**integer) }{}, "**reflectlite_test.integer"},
{struct{ x ([32]int32) }{}, "[32]int32"},
{struct{ x ([]int8) }{}, "[]int8"},
{struct{ x (map[string]int32) }{}, "map[string]int32"},
{struct{ x (chan<- string) }{}, "chan<- string"},
{struct {
x struct {
c chan *int32
d float32
}
}{},
"struct { c chan *int32; d float32 }",
},
{struct{ x (func(a int8, b int32)) }{}, "func(int8, int32)"},
{struct {
x struct {
c func(chan *integer, *int8)
}
}{},
"struct { c func(chan *reflectlite_test.integer, *int8) }",
},
{struct {
x struct {
a int8
b int32
}
}{},
"struct { a int8; b int32 }",
},
{struct {
x struct {
a int8
b int8
c int32
}
}{},
"struct { a int8; b int8; c int32 }",
},
{struct {
x struct {
a int8
b int8
c int8
d int32
}
}{},
"struct { a int8; b int8; c int8; d int32 }",
},
{struct {
x struct {
a int8
b int8
c int8
d int8
e int32
}
}{},
"struct { a int8; b int8; c int8; d int8; e int32 }",
},
{struct {
x struct {
a int8
b int8
c int8
d int8
e int8
f int32
}
}{},
"struct { a int8; b int8; c int8; d int8; e int8; f int32 }",
},
{struct {
x struct {
a int8 `reflect:"hi there"`
}
}{},
`struct { a int8 "reflect:\"hi there\"" }`,
},
{struct {
x struct {
a int8 `reflect:"hi \x00there\t\n\"\\"`
}
}{},
`struct { a int8 "reflect:\"hi \\x00there\\t\\n\\\"\\\\\"" }`,
},
{struct {
x struct {
f func(args ...int)
}
}{},
"struct { f func(...int) }",
},
// {struct {
// x (interface {
// a(func(func(int) int) func(func(int)) int)
// b()
// })
// }{},
// "interface { reflectlite_test.a(func(func(int) int) func(func(int)) int); reflectlite_test.b() }",
// },
{struct {
x struct {
int32
int64
}
}{},
"struct { int32; int64 }",
},
}
var valueTests = []pair{
{new(int), "132"},
{new(int8), "8"},
{new(int16), "16"},
{new(int32), "32"},
{new(int64), "64"},
{new(uint), "132"},
{new(uint8), "8"},
{new(uint16), "16"},
{new(uint32), "32"},
{new(uint64), "64"},
{new(float32), "256.25"},
{new(float64), "512.125"},
{new(complex64), "532.125+10i"},
{new(complex128), "564.25+1i"},
{new(string), "stringy cheese"},
{new(bool), "true"},
{new(*int8), "*int8(0)"},
{new(**int8), "**int8(0)"},
{new([5]int32), "[5]int32{0, 0, 0, 0, 0}"},
{new(**integer), "**reflectlite_test.integer(0)"},
{new(map[string]int32), "map[string]int32{<can't iterate on maps>}"},
{new(chan<- string), "chan<- string"},
{new(func(a int8, b int32)), "func(int8, int32)(arg)"},
{new(struct {
c chan *int32
d float32
}),
"struct { c chan *int32; d float32 }{chan *int32, 0}",
},
{new(struct{ c func(chan *integer, *int8) }),
"struct { c func(chan *reflectlite_test.integer, *int8) }{func(chan *reflectlite_test.integer, *int8)(arg)}",
},
{new(struct {
a int8
b int32
}),
"struct { a int8; b int32 }{0, 0}",
},
{new(struct {
a int8
b int8
c int32
}),
"struct { a int8; b int8; c int32 }{0, 0, 0}",
},
}
func testType(t *testing.T, i int, typ Type, want string) {
s := TypeString(typ)
if s != want {
t.Errorf("#%d: have %#q, want %#q", i, s, want)
}
}
func testReflectType(t *testing.T, i int, typ Type, want string) {
s := TypeString(typ)
if s != want {
t.Errorf("#%d: have %#q, want %#q", i, s, want)
}
}
func TestTypes(t *testing.T) {
for i, tt := range typeTests {
testReflectType(t, i, Field(ValueOf(tt.i), 0).Type(), tt.s)
}
}
func TestSetValue(t *testing.T) {
for i, tt := range valueTests {
v := ValueOf(tt.i).Elem()
switch v.Kind() {
case Int:
v.Set(ValueOf(int(132)))
case Int8:
v.Set(ValueOf(int8(8)))
case Int16:
v.Set(ValueOf(int16(16)))
case Int32:
v.Set(ValueOf(int32(32)))
case Int64:
v.Set(ValueOf(int64(64)))
case Uint:
v.Set(ValueOf(uint(132)))
case Uint8:
v.Set(ValueOf(uint8(8)))
case Uint16:
v.Set(ValueOf(uint16(16)))
case Uint32:
v.Set(ValueOf(uint32(32)))
case Uint64:
v.Set(ValueOf(uint64(64)))
case Float32:
v.Set(ValueOf(float32(256.25)))
case Float64:
v.Set(ValueOf(512.125))
case Complex64:
v.Set(ValueOf(complex64(532.125 + 10i)))
case Complex128:
v.Set(ValueOf(complex128(564.25 + 1i)))
case String:
v.Set(ValueOf("stringy cheese"))
case Bool:
v.Set(ValueOf(true))
}
s := valueToString(v)
if s != tt.s {
t.Errorf("#%d: have %#q, want %#q", i, s, tt.s)
}
}
}
func TestCanSetField(t *testing.T) {
type embed struct{ x, X int }
type Embed struct{ x, X int }
type S1 struct {
embed
x, X int
}
type S2 struct {
*embed
x, X int
}
type S3 struct {
Embed
x, X int
}
type S4 struct {
*Embed
x, X int
}
type testCase struct {
index []int
canSet bool
}
tests := []struct {
val Value
cases []testCase
}{{
val: ValueOf(&S1{}),
cases: []testCase{
{[]int{0}, false},
{[]int{0, 0}, false},
{[]int{0, 1}, true},
{[]int{1}, false},
{[]int{2}, true},
},
}, {
val: ValueOf(&S2{embed: &embed{}}),
cases: []testCase{
{[]int{0}, false},
{[]int{0, 0}, false},
{[]int{0, 1}, true},
{[]int{1}, false},
{[]int{2}, true},
},
}, {
val: ValueOf(&S3{}),
cases: []testCase{
{[]int{0}, true},
{[]int{0, 0}, false},
{[]int{0, 1}, true},
{[]int{1}, false},
{[]int{2}, true},
},
}, {
val: ValueOf(&S4{Embed: &Embed{}}),
cases: []testCase{
{[]int{0}, true},
{[]int{0, 0}, false},
{[]int{0, 1}, true},
{[]int{1}, false},
{[]int{2}, true},
},
}}
for _, tt := range tests {
t.Run(tt.val.Type().Name(), func(t *testing.T) {
for _, tc := range tt.cases {
f := tt.val
for _, i := range tc.index {
if f.Kind() == Ptr {
f = f.Elem()
}
f = Field(f, i)
}
if got := f.CanSet(); got != tc.canSet {
t.Errorf("CanSet() = %v, want %v", got, tc.canSet)
}
}
})
}
}
var _i = 7
var valueToStringTests = []pair{
{123, "123"},
{123.5, "123.5"},
{byte(123), "123"},
{"abc", "abc"},
{T{123, 456.75, "hello", &_i}, "reflectlite_test.T{123, 456.75, hello, *int(&7)}"},
{new(chan *T), "*chan *reflectlite_test.T(&chan *reflectlite_test.T)"},
{[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}"},
{&[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "*[10]int(&[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10})"},
{[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}"},
{&[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "*[]int(&[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10})"},
}
func TestValueToString(t *testing.T) {
for i, test := range valueToStringTests {
s := valueToString(ValueOf(test.i))
if s != test.s {
t.Errorf("#%d: have %#q, want %#q", i, s, test.s)
}
}
}
func TestPtrSetNil(t *testing.T) {
var i int32 = 1234
ip := &i
vip := ValueOf(&ip)
vip.Elem().Set(Zero(vip.Elem().Type()))
if ip != nil {
t.Errorf("got non-nil (%d), want nil", *ip)
}
}
func TestMapSetNil(t *testing.T) {
m := make(map[string]int)
vm := ValueOf(&m)
vm.Elem().Set(Zero(vm.Elem().Type()))
if m != nil {
t.Errorf("got non-nil (%p), want nil", m)
}
}
func TestAll(t *testing.T) {
testType(t, 1, TypeOf((int8)(0)), "int8")
testType(t, 2, TypeOf((*int8)(nil)).Elem(), "int8")
typ := TypeOf((*struct {
c chan *int32
d float32
})(nil))
testType(t, 3, typ, "*struct { c chan *int32; d float32 }")
etyp := typ.Elem()
testType(t, 4, etyp, "struct { c chan *int32; d float32 }")
}
func TestInterfaceValue(t *testing.T) {
var inter struct {
E interface{}
}
inter.E = 123.456
v1 := ValueOf(&inter)
v2 := Field(v1.Elem(), 0)
// assert(t, TypeString(v2.Type()), "interface {}")
v3 := v2.Elem()
assert(t, TypeString(v3.Type()), "float64")
i3 := ToInterface(v2)
if _, ok := i3.(float64); !ok {
t.Error("v2.Interface() did not return float64, got ", TypeOf(i3))
}
}
func TestFunctionValue(t *testing.T) {
var x interface{} = func() {}
v := ValueOf(x)
if fmt.Sprint(ToInterface(v)) != fmt.Sprint(x) {
t.Fatalf("TestFunction returned wrong pointer")
}
assert(t, TypeString(v.Type()), "func()")
}
var appendTests = []struct {
orig, extra []int
}{
{make([]int, 2, 4), []int{22}},
{make([]int, 2, 4), []int{22, 33, 44}},
}
func sameInts(x, y []int) bool {
if len(x) != len(y) {
return false
}
for i, xx := range x {
if xx != y[i] {
return false
}
}
return true
}
func TestBigUnnamedStruct(t *testing.T) {
b := struct{ a, b, c, d int64 }{1, 2, 3, 4}
v := ValueOf(b)
b1 := ToInterface(v).(struct {
a, b, c, d int64
})
if b1.a != b.a || b1.b != b.b || b1.c != b.c || b1.d != b.d {
t.Errorf("ValueOf(%v).Interface().(*Big) = %v", b, b1)
}
}
type big struct {
a, b, c, d, e int64
}
func TestBigStruct(t *testing.T) {
b := big{1, 2, 3, 4, 5}
v := ValueOf(b)
b1 := ToInterface(v).(big)
if b1.a != b.a || b1.b != b.b || b1.c != b.c || b1.d != b.d || b1.e != b.e {
t.Errorf("ValueOf(%v).Interface().(big) = %v", b, b1)
}
}
type Basic struct {
x int
y float32
}
type NotBasic Basic
type DeepEqualTest struct {
a, b interface{}
eq bool
}
// Simple functions for DeepEqual tests.
var (
fn1 func() // nil.
fn2 func() // nil.
fn3 = func() { fn1() } // Not nil.
)
type self struct{}
type Loop *Loop
type Loopy interface{}
var loop1, loop2 Loop
var loopy1, loopy2 Loopy
func init() {
loop1 = &loop2
loop2 = &loop1
loopy1 = &loopy2
loopy2 = &loopy1
}
var typeOfTests = []DeepEqualTest{
// Equalities
{nil, nil, true},
{1, 1, true},
{int32(1), int32(1), true},
{0.5, 0.5, true},
{float32(0.5), float32(0.5), true},
{"hello", "hello", true},
{make([]int, 10), make([]int, 10), true},
{&[3]int{1, 2, 3}, &[3]int{1, 2, 3}, true},
{Basic{1, 0.5}, Basic{1, 0.5}, true},
{error(nil), error(nil), true},
{map[int]string{1: "one", 2: "two"}, map[int]string{2: "two", 1: "one"}, true},
{fn1, fn2, true},
// Inequalities
{1, 2, false},
{int32(1), int32(2), false},
{0.5, 0.6, false},
{float32(0.5), float32(0.6), false},
{"hello", "hey", false},
{make([]int, 10), make([]int, 11), false},
{&[3]int{1, 2, 3}, &[3]int{1, 2, 4}, false},
{Basic{1, 0.5}, Basic{1, 0.6}, false},
{Basic{1, 0}, Basic{2, 0}, false},
{map[int]string{1: "one", 3: "two"}, map[int]string{2: "two", 1: "one"}, false},
{map[int]string{1: "one", 2: "txo"}, map[int]string{2: "two", 1: "one"}, false},
{map[int]string{1: "one"}, map[int]string{2: "two", 1: "one"}, false},
{map[int]string{2: "two", 1: "one"}, map[int]string{1: "one"}, false},
{nil, 1, false},
{1, nil, false},
{fn1, fn3, false},
{fn3, fn3, false},
{[][]int{{1}}, [][]int{{2}}, false},
{math.NaN(), math.NaN(), false},
{&[1]float64{math.NaN()}, &[1]float64{math.NaN()}, false},
{&[1]float64{math.NaN()}, self{}, true},
{[]float64{math.NaN()}, []float64{math.NaN()}, false},
{[]float64{math.NaN()}, self{}, true},
{map[float64]float64{math.NaN(): 1}, map[float64]float64{1: 2}, false},
{map[float64]float64{math.NaN(): 1}, self{}, true},
// Nil vs empty: not the same.
{[]int{}, []int(nil), false},
{[]int{}, []int{}, true},
{[]int(nil), []int(nil), true},
{map[int]int{}, map[int]int(nil), false},
{map[int]int{}, map[int]int{}, true},
{map[int]int(nil), map[int]int(nil), true},
// Mismatched types
{1, 1.0, false},
{int32(1), int64(1), false},
{0.5, "hello", false},
{[]int{1, 2, 3}, [3]int{1, 2, 3}, false},
{&[3]interface{}{1, 2, 4}, &[3]interface{}{1, 2, "s"}, false},
{Basic{1, 0.5}, NotBasic{1, 0.5}, false},
{map[uint]string{1: "one", 2: "two"}, map[int]string{2: "two", 1: "one"}, false},
// Possible loops.
{&loop1, &loop1, true},
{&loop1, &loop2, true},
{&loopy1, &loopy1, true},
{&loopy1, &loopy2, true},
}
func TestTypeOf(t *testing.T) {
// Special case for nil
if typ := TypeOf(nil); typ != nil {
t.Errorf("expected nil type for nil value; got %v", typ)
}
for _, test := range typeOfTests {
v := ValueOf(test.a)
if !v.IsValid() {
continue
}
typ := TypeOf(test.a)
if typ != v.Type() {
t.Errorf("TypeOf(%v) = %v, but ValueOf(%v).Type() = %v", test.a, typ, test.a, v.Type())
}
}
}
func Nil(a interface{}, t *testing.T) {
n := Field(ValueOf(a), 0)
if !n.IsNil() {
t.Errorf("%v should be nil", a)
}
}
func NotNil(a interface{}, t *testing.T) {
n := Field(ValueOf(a), 0)
if n.IsNil() {
t.Errorf("value of type %v should not be nil", TypeString(ValueOf(a).Type()))
}
}
func TestIsNil(t *testing.T) {
// These implement IsNil.
// Wrap in extra struct to hide interface type.
doNil := []interface{}{
struct{ x *int }{},
struct{ x interface{} }{},
struct{ x map[string]int }{},
struct{ x func() bool }{},
struct{ x chan int }{},
struct{ x []string }{},
struct{ x unsafe.Pointer }{},
}
for _, ts := range doNil {
ty := TField(TypeOf(ts), 0)
v := Zero(ty)
v.IsNil() // panics if not okay to call
}
// Check the implementations
var pi struct {
x *int
}
Nil(pi, t)
pi.x = new(int)
NotNil(pi, t)
var si struct {
x []int
}
Nil(si, t)
si.x = make([]int, 10)
NotNil(si, t)
var ci struct {
x chan int
}
Nil(ci, t)
ci.x = make(chan int)
NotNil(ci, t)
var mi struct {
x map[int]int
}
Nil(mi, t)
mi.x = make(map[int]int)
NotNil(mi, t)
var ii struct {
x interface{}
}
Nil(ii, t)
ii.x = 2
NotNil(ii, t)
var fi struct {
x func(t *testing.T)
}
Nil(fi, t)
fi.x = TestIsNil
NotNil(fi, t)
}
// Indirect returns the value that v points to.
// If v is a nil pointer, Indirect returns a zero Value.
// If v is not a pointer, Indirect returns v.
func Indirect(v Value) Value {
if v.Kind() != Ptr {
return v
}
return v.Elem()
}
func TestNilPtrValueSub(t *testing.T) {
var pi *int
if pv := ValueOf(pi); pv.Elem().IsValid() {
t.Error("ValueOf((*int)(nil)).Elem().IsValid()")
}
}
type Point struct {
x, y int
}
// This will be index 0.
func (p Point) AnotherMethod(scale int) int {
return -1
}
// This will be index 1.
func (p Point) Dist(scale int) int {
//println("Point.Dist", p.x, p.y, scale)
return p.x*p.x*scale + p.y*p.y*scale
}
// This will be index 2.
func (p Point) GCMethod(k int) int {
runtime.GC()
return k + p.x
}
// This will be index 3.
func (p Point) NoArgs() {
// Exercise no-argument/no-result paths.
}
// This will be index 4.
func (p Point) TotalDist(points ...Point) int {
tot := 0
for _, q := range points {
dx := q.x - p.x
dy := q.y - p.y
tot += dx*dx + dy*dy // Should call Sqrt, but it's just a test.
}
return tot
}
type D1 struct {
d int
}
type D2 struct {
d int
}
func TestImportPath(t *testing.T) {
tests := []struct {
t Type
path string
}{
{TypeOf(&base64.Encoding{}).Elem(), "encoding/base64"},
{TypeOf(int(0)), ""},
{TypeOf(int8(0)), ""},
{TypeOf(int16(0)), ""},
{TypeOf(int32(0)), ""},
{TypeOf(int64(0)), ""},
{TypeOf(uint(0)), ""},
{TypeOf(uint8(0)), ""},
{TypeOf(uint16(0)), ""},
{TypeOf(uint32(0)), ""},
{TypeOf(uint64(0)), ""},
{TypeOf(uintptr(0)), ""},
{TypeOf(float32(0)), ""},
{TypeOf(float64(0)), ""},
{TypeOf(complex64(0)), ""},
{TypeOf(complex128(0)), ""},
{TypeOf(byte(0)), ""},
{TypeOf(rune(0)), ""},
{TypeOf([]byte(nil)), ""},
{TypeOf([]rune(nil)), ""},
{TypeOf(string("")), ""},
{TypeOf((*interface{})(nil)).Elem(), ""},
{TypeOf((*byte)(nil)), ""},
{TypeOf((*rune)(nil)), ""},
{TypeOf((*int64)(nil)), ""},
{TypeOf(map[string]int{}), ""},
{TypeOf((*error)(nil)).Elem(), ""},
{TypeOf((*Point)(nil)), ""},
{TypeOf((*Point)(nil)).Elem(), "internal/reflectlite_test"},
}
for _, test := range tests {
if path := test.t.PkgPath(); path != test.path {
t.Errorf("%v.PkgPath() = %q, want %q", test.t, path, test.path)
}
}
}
func noAlloc(t *testing.T, n int, f func(int)) {
if testing.Short() {
t.Skip("skipping malloc count in short mode")
}
if runtime.GOMAXPROCS(0) > 1 {
t.Skip("skipping; GOMAXPROCS>1")
}
i := -1
allocs := testing.AllocsPerRun(n, func() {
f(i)
i++
})
if allocs > 0 {
t.Errorf("%d iterations: got %v mallocs, want 0", n, allocs)
}
}
func TestAllocations(t *testing.T) {
noAlloc(t, 100, func(j int) {
var i interface{}
var v Value
// We can uncomment this when compiler escape analysis
// is good enough to see that the integer assigned to i
// does not escape and therefore need not be allocated.
//
// i = 42 + j
// v = ValueOf(i)
// if int(v.Int()) != 42+j {
// panic("wrong int")
// }
i = func(j int) int { return j }
v = ValueOf(i)
if ToInterface(v).(func(int) int)(j) != j {
panic("wrong result")
}
})
}
func TestSetPanic(t *testing.T) {
ok := func(f func()) { f() }
bad := shouldPanic
clear := func(v Value) { v.Set(Zero(v.Type())) }
type t0 struct {
W int
}
type t1 struct {
Y int
t0
}
type T2 struct {
Z int
namedT0 t0
}
type T struct {
X int
t1
T2
NamedT1 t1
NamedT2 T2
namedT1 t1
namedT2 T2
}
// not addressable
v := ValueOf(T{})
bad(func() { clear(Field(v, 0)) }) // .X
bad(func() { clear(Field(v, 1)) }) // .t1
bad(func() { clear(Field(Field(v, 1), 0)) }) // .t1.Y
bad(func() { clear(Field(Field(v, 1), 1)) }) // .t1.t0
bad(func() { clear(Field(Field(Field(v, 1), 1), 0)) }) // .t1.t0.W
bad(func() { clear(Field(v, 2)) }) // .T2
bad(func() { clear(Field(Field(v, 2), 0)) }) // .T2.Z
bad(func() { clear(Field(Field(v, 2), 1)) }) // .T2.namedT0
bad(func() { clear(Field(Field(Field(v, 2), 1), 0)) }) // .T2.namedT0.W
bad(func() { clear(Field(v, 3)) }) // .NamedT1
bad(func() { clear(Field(Field(v, 3), 0)) }) // .NamedT1.Y
bad(func() { clear(Field(Field(v, 3), 1)) }) // .NamedT1.t0
bad(func() { clear(Field(Field(Field(v, 3), 1), 0)) }) // .NamedT1.t0.W
bad(func() { clear(Field(v, 4)) }) // .NamedT2
bad(func() { clear(Field(Field(v, 4), 0)) }) // .NamedT2.Z
bad(func() { clear(Field(Field(v, 4), 1)) }) // .NamedT2.namedT0
bad(func() { clear(Field(Field(Field(v, 4), 1), 0)) }) // .NamedT2.namedT0.W
bad(func() { clear(Field(v, 5)) }) // .namedT1
bad(func() { clear(Field(Field(v, 5), 0)) }) // .namedT1.Y
bad(func() { clear(Field(Field(v, 5), 1)) }) // .namedT1.t0
bad(func() { clear(Field(Field(Field(v, 5), 1), 0)) }) // .namedT1.t0.W
bad(func() { clear(Field(v, 6)) }) // .namedT2
bad(func() { clear(Field(Field(v, 6), 0)) }) // .namedT2.Z
bad(func() { clear(Field(Field(v, 6), 1)) }) // .namedT2.namedT0
bad(func() { clear(Field(Field(Field(v, 6), 1), 0)) }) // .namedT2.namedT0.W
// addressable
v = ValueOf(&T{}).Elem()
ok(func() { clear(Field(v, 0)) }) // .X
bad(func() { clear(Field(v, 1)) }) // .t1
ok(func() { clear(Field(Field(v, 1), 0)) }) // .t1.Y
bad(func() { clear(Field(Field(v, 1), 1)) }) // .t1.t0
ok(func() { clear(Field(Field(Field(v, 1), 1), 0)) }) // .t1.t0.W
ok(func() { clear(Field(v, 2)) }) // .T2
ok(func() { clear(Field(Field(v, 2), 0)) }) // .T2.Z
bad(func() { clear(Field(Field(v, 2), 1)) }) // .T2.namedT0
bad(func() { clear(Field(Field(Field(v, 2), 1), 0)) }) // .T2.namedT0.W
ok(func() { clear(Field(v, 3)) }) // .NamedT1
ok(func() { clear(Field(Field(v, 3), 0)) }) // .NamedT1.Y
bad(func() { clear(Field(Field(v, 3), 1)) }) // .NamedT1.t0
ok(func() { clear(Field(Field(Field(v, 3), 1), 0)) }) // .NamedT1.t0.W
ok(func() { clear(Field(v, 4)) }) // .NamedT2
ok(func() { clear(Field(Field(v, 4), 0)) }) // .NamedT2.Z
bad(func() { clear(Field(Field(v, 4), 1)) }) // .NamedT2.namedT0
bad(func() { clear(Field(Field(Field(v, 4), 1), 0)) }) // .NamedT2.namedT0.W
bad(func() { clear(Field(v, 5)) }) // .namedT1
bad(func() { clear(Field(Field(v, 5), 0)) }) // .namedT1.Y
bad(func() { clear(Field(Field(v, 5), 1)) }) // .namedT1.t0
bad(func() { clear(Field(Field(Field(v, 5), 1), 0)) }) // .namedT1.t0.W
bad(func() { clear(Field(v, 6)) }) // .namedT2
bad(func() { clear(Field(Field(v, 6), 0)) }) // .namedT2.Z
bad(func() { clear(Field(Field(v, 6), 1)) }) // .namedT2.namedT0
bad(func() { clear(Field(Field(Field(v, 6), 1), 0)) }) // .namedT2.namedT0.W
}
func shouldPanic(f func()) {
defer func() {
if recover() == nil {
panic("did not panic")
}
}()
f()
}
type S struct {
i1 int64
i2 int64
}
func TestBigZero(t *testing.T) {
const size = 1 << 10
var v [size]byte
z := ToInterface(Zero(ValueOf(v).Type())).([size]byte)
for i := 0; i < size; i++ {
if z[i] != 0 {
t.Fatalf("Zero object not all zero, index %d", i)
}
}
}
func TestInvalid(t *testing.T) {
// Used to have inconsistency between IsValid() and Kind() != Invalid.
type T struct{ v interface{} }
v := Field(ValueOf(T{}), 0)
if v.IsValid() != true || v.Kind() != Interface {
t.Errorf("field: IsValid=%v, Kind=%v, want true, Interface", v.IsValid(), v.Kind())
}
v = v.Elem()
if v.IsValid() != false || v.Kind() != Invalid {
t.Errorf("field elem: IsValid=%v, Kind=%v, want false, Invalid", v.IsValid(), v.Kind())
}
}
type TheNameOfThisTypeIsExactly255BytesLongSoWhenTheCompilerPrependsTheReflectTestPackageNameAndExtraStarTheLinkerRuntimeAndReflectPackagesWillHaveToCorrectlyDecodeTheSecondLengthByte0123456789_0123456789_0123456789_0123456789_0123456789_012345678 int
type nameTest struct {
v interface{}
want string
}
var nameTests = []nameTest{
{(*int32)(nil), "int32"},
{(*D1)(nil), "D1"},
{(*[]D1)(nil), ""},
{(*chan D1)(nil), ""},
{(*func() D1)(nil), ""},
{(*<-chan D1)(nil), ""},
{(*chan<- D1)(nil), ""},
{(*interface{})(nil), ""},
{(*interface {
F()
})(nil), ""},
{(*TheNameOfThisTypeIsExactly255BytesLongSoWhenTheCompilerPrependsTheReflectTestPackageNameAndExtraStarTheLinkerRuntimeAndReflectPackagesWillHaveToCorrectlyDecodeTheSecondLengthByte0123456789_0123456789_0123456789_0123456789_0123456789_012345678)(nil), "TheNameOfThisTypeIsExactly255BytesLongSoWhenTheCompilerPrependsTheReflectTestPackageNameAndExtraStarTheLinkerRuntimeAndReflectPackagesWillHaveToCorrectlyDecodeTheSecondLengthByte0123456789_0123456789_0123456789_0123456789_0123456789_012345678"},
}
func TestNames(t *testing.T) {
for _, test := range nameTests {
typ := TypeOf(test.v).Elem()
if got := typ.Name(); got != test.want {
t.Errorf("%v Name()=%q, want %q", typ, got, test.want)
}
}
}
type embed struct {
EmbedWithUnexpMeth
}
func TestNameBytesAreAligned(t *testing.T) {
typ := TypeOf(embed{})
b := FirstMethodNameBytes(typ)
v := uintptr(unsafe.Pointer(b))
if v%unsafe.Alignof((*byte)(nil)) != 0 {
t.Errorf("reflect.name.bytes pointer is not aligned: %x", v)
}
}
// TestUnaddressableField tests that the reflect package will not allow
// a type from another package to be used as a named type with an
// unexported field.
//
// This ensures that unexported fields cannot be modified by other packages.
func TestUnaddressableField(t *testing.T) {
var b Buffer // type defined in reflect, a different package
var localBuffer struct {
buf []byte
}
lv := ValueOf(&localBuffer).Elem()
rv := ValueOf(b)
shouldPanic(func() {
lv.Set(rv)
})
}
type Tint int
type Tint2 = Tint
type Talias1 struct {
byte
uint8
int
int32
rune
}
type Talias2 struct {
Tint
Tint2
}
func TestAliasNames(t *testing.T) {
t1 := Talias1{byte: 1, uint8: 2, int: 3, int32: 4, rune: 5}
out := fmt.Sprintf("%#v", t1)
want := "reflectlite_test.Talias1{byte:0x1, uint8:0x2, int:3, int32:4, rune:5}"
if out != want {
t.Errorf("Talias1 print:\nhave: %s\nwant: %s", out, want)
}
t2 := Talias2{Tint: 1, Tint2: 2}
out = fmt.Sprintf("%#v", t2)
want = "reflectlite_test.Talias2{Tint:1, Tint2:2}"
if out != want {
t.Errorf("Talias2 print:\nhave: %s\nwant: %s", out, want)
}
}
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