// 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 reflect_test
import (
"io";
"os";
. "reflect";
"testing";
"unsafe";
)
type integer int
type T struct {
a int;
b float64;
c string;
d *int;
}
type pair struct {
i interface{};
s string;
}
func isDigit(c uint8) bool { return '0' <= c && c <= '9' }
func assert(t *testing.T, s, want string) {
if s != want {
t.Errorf("have %#q want %#q", s, want)
}
}
func typestring(i interface{}) string { return Typeof(i).String() }
var typeTests = []pair{
pair{struct{ x int }{}, "int"},
pair{struct{ x int8 }{}, "int8"},
pair{struct{ x int16 }{}, "int16"},
pair{struct{ x int32 }{}, "int32"},
pair{struct{ x int64 }{}, "int64"},
pair{struct{ x uint }{}, "uint"},
pair{struct{ x uint8 }{}, "uint8"},
pair{struct{ x uint16 }{}, "uint16"},
pair{struct{ x uint32 }{}, "uint32"},
pair{struct{ x uint64 }{}, "uint64"},
pair{struct{ x float }{}, "float"},
pair{struct{ x float32 }{}, "float32"},
pair{struct{ x float64 }{}, "float64"},
pair{struct{ x int8 }{}, "int8"},
pair{struct{ x (**int8) }{}, "**int8"},
pair{struct{ x (**integer) }{}, "**reflect_test.integer"},
pair{struct{ x ([32]int32) }{}, "[32]int32"},
pair{struct{ x ([]int8) }{}, "[]int8"},
pair{struct{ x (map[string]int32) }{}, "map[string] int32"},
pair{struct{ x (chan<- string) }{}, "chan<- string"},
pair{struct {
x struct {
c chan *int32;
d float32;
};
}{},
"struct { c chan *int32; d float32 }",
},
pair{struct{ x (func(a int8, b int32)) }{}, "func(int8, int32)"},
pair{struct {
x struct {
c func(chan *integer, *int8);
};
}{},
"struct { c func(chan *reflect_test.integer, *int8) }",
},
pair{struct {
x struct {
a int8;
b int32;
};
}{},
"struct { a int8; b int32 }",
},
pair{struct {
x struct {
a int8;
b int8;
c int32;
};
}{},
"struct { a int8; b int8; c int32 }",
},
pair{struct {
x struct {
a int8;
b int8;
c int8;
d int32;
};
}{},
"struct { a int8; b int8; c int8; d int32 }",
},
pair{struct {
x struct {
a int8;
b int8;
c int8;
d int8;
e int32;
};
}{},
"struct { a int8; b int8; c int8; d int8; e int32 }",
},
pair{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 }",
},
pair{struct {
x struct {
a int8 "hi there";
};
}{},
`struct { a int8 "hi there" }`,
},
pair{struct {
x struct {
a int8 "hi \x00there\t\n\"\\";
};
}{},
`struct { a int8 "hi \x00there\t\n\"\\" }`,
},
pair{struct {
x struct {
f func(args ...);
};
}{},
"struct { f func(...) }",
},
pair{struct {
x (interface {
a(func(func(int) int) (func(func(int)) int));
b();
});
}{},
"interface { a (func(func(int) (int)) (func(func(int)) (int))); b () }",
},
}
var valueTests = []pair{
pair{(int8)(0), "8"},
pair{(int16)(0), "16"},
pair{(int32)(0), "32"},
pair{(int64)(0), "64"},
pair{(uint8)(0), "8"},
pair{(uint16)(0), "16"},
pair{(uint32)(0), "32"},
pair{(uint64)(0), "64"},
pair{(float32)(0), "32.1"},
pair{(float64)(0), "64.2"},
pair{(string)(""), "stringy cheese"},
pair{(bool)(false), "true"},
pair{(*int8)(nil), "*int8(0)"},
pair{(**int8)(nil), "**int8(0)"},
pair{([5]int32){}, "[5]int32{0, 0, 0, 0, 0}"},
pair{(**integer)(nil), "**reflect_test.integer(0)"},
pair{(map[string]int32)(nil), "map[string] int32{<can't iterate on maps>}"},
pair{(chan<- string)(nil), "chan<- string"},
pair{(struct {
c chan *int32;
d float32;
}){},
"struct { c chan *int32; d float32 }{chan *int32, 0}",
},
pair{(func(a int8, b int32))(nil), "func(int8, int32)(0)"},
pair{(struct {
c func(chan *integer, *int8);
}){},
"struct { c func(chan *reflect_test.integer, *int8) }{func(chan *reflect_test.integer, *int8)(0)}",
},
pair{(struct {
a int8;
b int32;
}){},
"struct { a int8; b int32 }{0, 0}",
},
pair{(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 := typ.String();
if s != want {
t.Errorf("#%d: have %#q, want %#q", i, s, want)
}
}
func TestTypes(t *testing.T) {
for i, tt := range typeTests {
testType(t, i, NewValue(tt.i).(*StructValue).Field(0).Type(), tt.s)
}
}
func TestSet(t *testing.T) {
for i, tt := range valueTests {
v := NewValue(tt.i);
switch v := v.(type) {
case *IntValue:
v.Set(132)
case *Int8Value:
v.Set(8)
case *Int16Value:
v.Set(16)
case *Int32Value:
v.Set(32)
case *Int64Value:
v.Set(64)
case *UintValue:
v.Set(132)
case *Uint8Value:
v.Set(8)
case *Uint16Value:
v.Set(16)
case *Uint32Value:
v.Set(32)
case *Uint64Value:
v.Set(64)
case *FloatValue:
v.Set(3200.0)
case *Float32Value:
v.Set(32.1)
case *Float64Value:
v.Set(64.2)
case *StringValue:
v.Set("stringy cheese")
case *BoolValue:
v.Set(true)
}
s := valueToString(v);
if s != tt.s {
t.Errorf("#%d: have %#q, want %#q", i, s, tt.s)
}
}
}
func TestSetValue(t *testing.T) {
for i, tt := range valueTests {
v := NewValue(tt.i);
switch v := v.(type) {
case *IntValue:
v.SetValue(NewValue(int(132)))
case *Int8Value:
v.SetValue(NewValue(int8(8)))
case *Int16Value:
v.SetValue(NewValue(int16(16)))
case *Int32Value:
v.SetValue(NewValue(int32(32)))
case *Int64Value:
v.SetValue(NewValue(int64(64)))
case *UintValue:
v.SetValue(NewValue(uint(132)))
case *Uint8Value:
v.SetValue(NewValue(uint8(8)))
case *Uint16Value:
v.SetValue(NewValue(uint16(16)))
case *Uint32Value:
v.SetValue(NewValue(uint32(32)))
case *Uint64Value:
v.SetValue(NewValue(uint64(64)))
case *FloatValue:
v.SetValue(NewValue(float(3200.0)))
case *Float32Value:
v.SetValue(NewValue(float32(32.1)))
case *Float64Value:
v.SetValue(NewValue(float64(64.2)))
case *StringValue:
v.SetValue(NewValue("stringy cheese"))
case *BoolValue:
v.SetValue(NewValue(true))
}
s := valueToString(v);
if s != tt.s {
t.Errorf("#%d: have %#q, want %#q", i, s, tt.s)
}
}
}
var _i = 7
var valueToStringTests = []pair{
pair{123, "123"},
pair{123.4, "123.4"},
pair{byte(123), "123"},
pair{"abc", "abc"},
pair{T{123, 456.75, "hello", &_i}, "reflect_test.T{123, 456.75, hello, *int(&7)}"},
pair{new(chan *T), "*chan *reflect_test.T(&chan *reflect_test.T)"},
pair{[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}"},
pair{&[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})"},
pair{[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}"},
pair{&[]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(NewValue(test.i));
if s != test.s {
t.Errorf("#%d: have %#q, want %#q", i, s, test.s)
}
}
}
func TestArrayElemSet(t *testing.T) {
v := NewValue([10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10});
v.(*ArrayValue).Elem(4).(*IntValue).Set(123);
s := valueToString(v);
const want = "[10]int{1, 2, 3, 4, 123, 6, 7, 8, 9, 10}";
if s != want {
t.Errorf("[10]int: have %#q want %#q", s, want)
}
v = NewValue([]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10});
v.(*SliceValue).Elem(4).(*IntValue).Set(123);
s = valueToString(v);
const want1 = "[]int{1, 2, 3, 4, 123, 6, 7, 8, 9, 10}";
if s != want1 {
t.Errorf("[]int: have %#q want %#q", s, want1)
}
}
func TestPtrPointTo(t *testing.T) {
var ip *int32;
var i int32 = 1234;
vip := NewValue(&ip);
vi := NewValue(i);
vip.(*PtrValue).Elem().(*PtrValue).PointTo(vi);
if *ip != 1234 {
t.Errorf("got %d, want 1234", *ip)
}
}
func TestAll(t *testing.T) {
testType(t, 1, Typeof((int8)(0)), "int8");
testType(t, 2, Typeof((*int8)(nil)).(*PtrType).Elem(), "int8");
typ := Typeof((*struct {
c chan *int32;
d float32;
})(nil));
testType(t, 3, typ, "*struct { c chan *int32; d float32 }");
etyp := typ.(*PtrType).Elem();
testType(t, 4, etyp, "struct { c chan *int32; d float32 }");
styp := etyp.(*StructType);
f := styp.Field(0);
testType(t, 5, f.Type, "chan *int32");
f, present := styp.FieldByName("d");
if !present {
t.Errorf("FieldByName says present field is absent")
}
testType(t, 6, f.Type, "float32");
f, present = styp.FieldByName("absent");
if present {
t.Errorf("FieldByName says absent field is present")
}
typ = Typeof([32]int32{});
testType(t, 7, typ, "[32]int32");
testType(t, 8, typ.(*ArrayType).Elem(), "int32");
typ = Typeof((map[string]*int32)(nil));
testType(t, 9, typ, "map[string] *int32");
mtyp := typ.(*MapType);
testType(t, 10, mtyp.Key(), "string");
testType(t, 11, mtyp.Elem(), "*int32");
typ = Typeof((chan<- string)(nil));
testType(t, 12, typ, "chan<- string");
testType(t, 13, typ.(*ChanType).Elem(), "string");
// make sure tag strings are not part of element type
typ = Typeof(struct {
d []uint32 "TAG";
}{}).(*StructType).Field(0).Type;
testType(t, 14, typ, "[]uint32");
}
func TestInterfaceGet(t *testing.T) {
var inter struct {
e interface{};
}
inter.e = 123.456;
v1 := NewValue(&inter);
v2 := v1.(*PtrValue).Elem().(*StructValue).Field(0);
assert(t, v2.Type().String(), "interface { }");
i2 := v2.(*InterfaceValue).Interface();
v3 := NewValue(i2);
assert(t, v3.Type().String(), "float");
}
func TestInterfaceValue(t *testing.T) {
var inter struct {
e interface{};
}
inter.e = 123.456;
v1 := NewValue(&inter);
v2 := v1.(*PtrValue).Elem().(*StructValue).Field(0);
assert(t, v2.Type().String(), "interface { }");
v3 := v2.(*InterfaceValue).Elem();
assert(t, v3.Type().String(), "float");
i3 := v2.Interface();
if _, ok := i3.(float); !ok {
t.Error("v2.Interface() did not return float, got ", Typeof(i3))
}
}
func TestFunctionValue(t *testing.T) {
v := NewValue(func() {});
if v.Interface() != v.Interface() {
t.Fatalf("TestFunction != itself")
}
assert(t, v.Type().String(), "func()");
}
func TestCopyArray(t *testing.T) {
a := []int{1, 2, 3, 4, 10, 9, 8, 7};
b := []int{11, 22, 33, 44, 1010, 99, 88, 77, 66, 55, 44};
c := []int{11, 22, 33, 44, 1010, 99, 88, 77, 66, 55, 44};
va := NewValue(&a);
vb := NewValue(&b);
for i := 0; i < len(b); i++ {
if b[i] != c[i] {
t.Fatalf("b != c before test")
}
}
aa := va.(*PtrValue).Elem().(*SliceValue);
ab := vb.(*PtrValue).Elem().(*SliceValue);
for tocopy := 1; tocopy <= 7; tocopy++ {
aa.SetLen(tocopy);
ArrayCopy(ab, aa);
aa.SetLen(8);
for i := 0; i < tocopy; i++ {
if a[i] != b[i] {
t.Errorf("(i) tocopy=%d a[%d]=%d, b[%d]=%d",
tocopy, i, a[i], i, b[i])
}
}
for i := tocopy; i < len(b); i++ {
if b[i] != c[i] {
if i < len(a) {
t.Errorf("(ii) tocopy=%d a[%d]=%d, b[%d]=%d, c[%d]=%d",
tocopy, i, a[i], i, b[i], i, c[i])
} else {
t.Errorf("(iii) tocopy=%d b[%d]=%d, c[%d]=%d",
tocopy, i, b[i], i, c[i])
}
} else {
t.Logf("tocopy=%d elem %d is okay\n", tocopy, i)
}
}
}
}
func TestBigUnnamedStruct(t *testing.T) {
b := struct{ a, b, c, d int64 }{1, 2, 3, 4};
v := NewValue(b);
b1 := v.Interface().(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("NewValue(%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 := NewValue(b);
b1 := v.Interface().(big);
if b1.a != b.a || b1.b != b.b || b1.c != b.c || b1.d != b.d || b1.e != b.e {
t.Errorf("NewValue(%v).Interface().(big) = %v", b, b1)
}
}
type Basic struct {
x int;
y float32;
}
type NotBasic Basic
type DeepEqualTest struct {
a, b interface{};
eq bool;
}
var deepEqualTests = []DeepEqualTest{
// Equalities
DeepEqualTest{1, 1, true},
DeepEqualTest{int32(1), int32(1), true},
DeepEqualTest{0.5, 0.5, true},
DeepEqualTest{float32(0.5), float32(0.5), true},
DeepEqualTest{"hello", "hello", true},
DeepEqualTest{make([]int, 10), make([]int, 10), true},
DeepEqualTest{&[3]int{1, 2, 3}, &[3]int{1, 2, 3}, true},
DeepEqualTest{Basic{1, 0.5}, Basic{1, 0.5}, true},
DeepEqualTest{os.Error(nil), os.Error(nil), true},
DeepEqualTest{map[int]string{1: "one", 2: "two"}, map[int]string{2: "two", 1: "one"}, true},
// Inequalities
DeepEqualTest{1, 2, false},
DeepEqualTest{int32(1), int32(2), false},
DeepEqualTest{0.5, 0.6, false},
DeepEqualTest{float32(0.5), float32(0.6), false},
DeepEqualTest{"hello", "hey", false},
DeepEqualTest{make([]int, 10), make([]int, 11), false},
DeepEqualTest{&[3]int{1, 2, 3}, &[3]int{1, 2, 4}, false},
DeepEqualTest{Basic{1, 0.5}, Basic{1, 0.6}, false},
DeepEqualTest{Basic{1, 0}, Basic{2, 0}, false},
DeepEqualTest{map[int]string{1: "one", 3: "two"}, map[int]string{2: "two", 1: "one"}, false},
DeepEqualTest{map[int]string{1: "one", 2: "txo"}, map[int]string{2: "two", 1: "one"}, false},
DeepEqualTest{map[int]string{1: "one"}, map[int]string{2: "two", 1: "one"}, false},
DeepEqualTest{map[int]string{2: "two", 1: "one"}, map[int]string{1: "one"}, false},
DeepEqualTest{nil, 1, false},
DeepEqualTest{1, nil, false},
// Mismatched types
DeepEqualTest{1, 1.0, false},
DeepEqualTest{int32(1), int64(1), false},
DeepEqualTest{0.5, "hello", false},
DeepEqualTest{[]int{1, 2, 3}, [3]int{1, 2, 3}, false},
DeepEqualTest{&[3]interface{}{1, 2, 4}, &[3]interface{}{1, 2, "s"}, false},
DeepEqualTest{Basic{1, 0.5}, NotBasic{1, 0.5}, false},
DeepEqualTest{map[uint]string{1: "one", 2: "two"}, map[int]string{2: "two", 1: "one"}, false},
}
func TestDeepEqual(t *testing.T) {
for _, test := range deepEqualTests {
if r := DeepEqual(test.a, test.b); r != test.eq {
t.Errorf("DeepEqual(%v, %v) = %v, want %v", test.a, test.b, r, test.eq)
}
}
}
func TestTypeof(t *testing.T) {
for _, test := range deepEqualTests {
v := NewValue(test.a);
if v == nil {
continue
}
typ := Typeof(test.a);
if typ != v.Type() {
t.Errorf("Typeof(%v) = %v, but NewValue(%v).Type() = %v", test.a, typ, test.a, v.Type())
}
}
}
type Recursive struct {
x int;
r *Recursive;
}
func TestDeepEqualRecursiveStruct(t *testing.T) {
a, b := new(Recursive), new(Recursive);
*a = Recursive{12, a};
*b = Recursive{12, b};
if !DeepEqual(a, b) {
t.Error("DeepEqual(recursive same) = false, want true")
}
}
type Complex struct {
a int;
b [3]*Complex;
c *string;
d map[float]float;
}
func TestDeepEqualComplexStruct(t *testing.T) {
m := make(map[float]float);
stra, strb := "hello", "hello";
a, b := new(Complex), new(Complex);
*a = Complex{5, [3]*Complex{a, b, a}, &stra, m};
*b = Complex{5, [3]*Complex{b, a, a}, &strb, m};
if !DeepEqual(a, b) {
t.Error("DeepEqual(complex same) = false, want true")
}
}
func TestDeepEqualComplexStructInequality(t *testing.T) {
m := make(map[float]float);
stra, strb := "hello", "helloo"; // Difference is here
a, b := new(Complex), new(Complex);
*a = Complex{5, [3]*Complex{a, b, a}, &stra, m};
*b = Complex{5, [3]*Complex{b, a, a}, &strb, m};
if DeepEqual(a, b) {
t.Error("DeepEqual(complex different) = true, want false")
}
}
func check2ndField(x interface{}, offs uintptr, t *testing.T) {
s := NewValue(x).(*StructValue);
f := s.Type().(*StructType).Field(1);
if f.Offset != offs {
t.Error("mismatched offsets in structure alignment:", f.Offset, offs)
}
}
// Check that structure alignment & offsets viewed through reflect agree with those
// from the compiler itself.
func TestAlignment(t *testing.T) {
type T1inner struct {
a int;
}
type T1 struct {
T1inner;
f int;
}
type T2inner struct {
a, b int;
}
type T2 struct {
T2inner;
f int;
}
x := T1{T1inner{2}, 17};
check2ndField(x, uintptr(unsafe.Pointer(&x.f))-uintptr(unsafe.Pointer(&x)), t);
x1 := T2{T2inner{2, 3}, 17};
check2ndField(x1, uintptr(unsafe.Pointer(&x1.f))-uintptr(unsafe.Pointer(&x1)), t);
}
type IsNiller interface {
IsNil() bool;
}
func Nil(a interface{}, t *testing.T) {
n := NewValue(a).(*StructValue).Field(0).(IsNiller);
if !n.IsNil() {
t.Errorf("%v should be nil", a)
}
}
func NotNil(a interface{}, t *testing.T) {
n := NewValue(a).(*StructValue).Field(0).(IsNiller);
if n.IsNil() {
t.Errorf("value of type %v should not be nil", NewValue(a).Type().String())
}
}
func TestIsNil(t *testing.T) {
// These do not implement IsNil
doNotNil := []interface{}{int(0), float32(0), struct{ a int }{}};
for _, ts := range doNotNil {
ty := Typeof(ts);
v := MakeZero(ty);
if _, ok := v.(IsNiller); ok {
t.Errorf("%s is nilable; should not be", ts)
}
}
// These do 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 }{},
};
for _, ts := range doNil {
ty := Typeof(ts).(*StructType).Field(0).Type;
v := MakeZero(ty);
if _, ok := v.(IsNiller); !ok {
t.Errorf("%s %T is not nilable; should be", ts, v)
}
}
// 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);
}
func TestInterfaceExtraction(t *testing.T) {
var s struct {
w io.Writer;
}
s.w = os.Stdout;
v := Indirect(NewValue(&s)).(*StructValue).Field(0).Interface();
if v != s.w.(interface{}) {
t.Error("Interface() on interface: ", v, s.w)
}
}
func TestInterfaceEditing(t *testing.T) {
// strings are bigger than one word,
// so the interface conversion allocates
// memory to hold a string and puts that
// pointer in the interface.
var i interface{} = "hello";
// if i pass the interface value by value
// to NewValue, i should get a fresh copy
// of the value.
v := NewValue(i);
// and setting that copy to "bye" should
// not change the value stored in i.
v.(*StringValue).Set("bye");
if i.(string) != "hello" {
t.Errorf(`Set("bye") changed i to %s`, i.(string))
}
// the same should be true of smaller items.
i = 123;
v = NewValue(i);
v.(*IntValue).Set(234);
if i.(int) != 123 {
t.Errorf("Set(234) changed i to %d", i.(int))
}
}
func TestNilPtrValueSub(t *testing.T) {
var pi *int;
if pv := NewValue(pi).(*PtrValue); pv.Elem() != nil {
t.Error("NewValue((*int)(nil)).(*PtrValue).Elem() != nil")
}
}
func TestMap(t *testing.T) {
m := map[string]int{"a": 1, "b": 2};
mv := NewValue(m).(*MapValue);
if n := mv.Len(); n != len(m) {
t.Errorf("Len = %d, want %d", n, len(m))
}
keys := mv.Keys();
i := 0;
newmap := MakeMap(mv.Type().(*MapType));
for k, v := range m {
// Check that returned Keys match keys in range.
// These aren't required to be in the same order,
// but they are in this implementation, which makes
// the test easier.
if i >= len(keys) {
t.Errorf("Missing key #%d %q", i, k)
} else if kv := keys[i].(*StringValue); kv.Get() != k {
t.Errorf("Keys[%d] = %q, want %q", i, kv.Get(), k)
}
i++;
// Check that value lookup is correct.
vv := mv.Elem(NewValue(k));
if vi := vv.(*IntValue).Get(); vi != v {
t.Errorf("Key %q: have value %d, want %d", vi, v)
}
// Copy into new map.
newmap.SetElem(NewValue(k), NewValue(v));
}
vv := mv.Elem(NewValue("not-present"));
if vv != nil {
t.Errorf("Invalid key: got non-nil value %s", valueToString(vv))
}
newm := newmap.Interface().(map[string]int);
if len(newm) != len(m) {
t.Errorf("length after copy: newm=%d, m=%d", newm, m)
}
for k, v := range newm {
mv, ok := m[k];
if mv != v {
t.Errorf("newm[%q] = %d, but m[%q] = %d, %v", k, v, k, mv, ok)
}
}
newmap.SetElem(NewValue("a"), nil);
v, ok := newm["a"];
if ok {
t.Errorf("newm[\"a\"] = %d after delete", v)
}
}
func TestChan(t *testing.T) {
for loop := 0; loop < 2; loop++ {
var c chan int;
var cv *ChanValue;
// check both ways to allocate channels
switch loop {
case 1:
c = make(chan int, 1);
cv = NewValue(c).(*ChanValue);
case 0:
cv = MakeChan(Typeof(c).(*ChanType), 1);
c = cv.Interface().(chan int);
}
// Send
cv.Send(NewValue(2));
if i := <-c; i != 2 {
t.Errorf("reflect Send 2, native recv %d", i)
}
// Recv
c <- 3;
if i := cv.Recv().(*IntValue).Get(); i != 3 {
t.Errorf("native send 3, reflect Recv %d", i)
}
// TryRecv fail
val := cv.TryRecv();
if val != nil {
t.Errorf("TryRecv on empty chan: %s", valueToString(val))
}
// TryRecv success
c <- 4;
val = cv.TryRecv();
if val == nil {
t.Errorf("TryRecv on ready chan got nil")
} else if i := val.(*IntValue).Get(); i != 4 {
t.Errorf("native send 4, TryRecv %d", i)
}
// TrySend fail
c <- 100;
ok := cv.TrySend(NewValue(5));
i := <-c;
if ok {
t.Errorf("TrySend on full chan succeeded: value %d", i)
}
// TrySend success
ok = cv.TrySend(NewValue(6));
if !ok {
t.Errorf("TrySend on empty chan failed")
} else {
if i = <-c; i != 6 {
t.Errorf("TrySend 6, recv %d", i)
}
}
// Close
c <- 123;
cv.Close();
if cv.Closed() {
t.Errorf("closed too soon - 1")
}
if i := cv.Recv().(*IntValue).Get(); i != 123 {
t.Errorf("send 123 then close; Recv %d", i)
}
if cv.Closed() {
t.Errorf("closed too soon - 2")
}
if i := cv.Recv().(*IntValue).Get(); i != 0 {
t.Errorf("after close Recv %d", i)
}
if !cv.Closed() {
t.Errorf("not closed")
}
}
// check creation of unbuffered channel
var c chan int;
cv := MakeChan(Typeof(c).(*ChanType), 0);
c = cv.Interface().(chan int);
if cv.TrySend(NewValue(7)) {
t.Errorf("TrySend on sync chan succeeded")
}
if cv.TryRecv() != nil {
t.Errorf("TryRecv on sync chan succeeded")
}
// len/cap
cv = MakeChan(Typeof(c).(*ChanType), 10);
c = cv.Interface().(chan int);
for i := 0; i < 3; i++ {
c <- i
}
if l, m := cv.Len(), cv.Cap(); l != len(c) || m != cap(c) {
t.Errorf("Len/Cap = %d/%d want %d/%d", l, m, len(c), cap(c))
}
}
// Difficult test for function call because of
// implicit padding between arguments.
func dummy(b byte, c int, d byte) (i byte, j int, k byte) {
return b, c, d
}
func TestFunc(t *testing.T) {
ret := NewValue(dummy).(*FuncValue).Call([]Value{NewValue(byte(10)), NewValue(20), NewValue(byte(30))});
if len(ret) != 3 {
t.Fatalf("Call returned %d values, want 3", len(ret))
}
i := ret[0].(*Uint8Value).Get();
j := ret[1].(*IntValue).Get();
k := ret[2].(*Uint8Value).Get();
if i != 10 || j != 20 || k != 30 {
t.Errorf("Call returned %d, %d, %d; want 10, 20, 30", i, j, k)
}
}
type Point struct {
x, y int;
}
func (p Point) Dist(scale int) int { return p.x*p.x*scale + p.y*p.y*scale }
func TestMethod(t *testing.T) {
// Non-curried method of type.
p := Point{3, 4};
i := Typeof(p).Method(0).Func.Call([]Value{NewValue(p), NewValue(10)})[0].(*IntValue).Get();
if i != 250 {
t.Errorf("Type Method returned %d; want 250", i)
}
// Curried method of value.
i = NewValue(p).Method(0).Call([]Value{NewValue(10)})[0].(*IntValue).Get();
if i != 250 {
t.Errorf("Value Method returned %d; want 250", i)
}
// Curried method of interface value.
// Have to wrap interface value in a struct to get at it.
// Passing it to NewValue directly would
// access the underlying Point, not the interface.
var s = struct {
x interface {
Dist(int) int;
};
}{p};
pv := NewValue(s).(*StructValue).Field(0);
i = pv.Method(0).Call([]Value{NewValue(10)})[0].(*IntValue).Get();
if i != 250 {
t.Errorf("Interface Method returned %d; want 250", i)
}
}
func TestInterfaceSet(t *testing.T) {
p := &Point{3, 4};
var s struct {
I interface{};
P interface {
Dist(int) int;
};
}
sv := NewValue(&s).(*PtrValue).Elem().(*StructValue);
sv.Field(0).(*InterfaceValue).Set(NewValue(p));
if q := s.I.(*Point); q != p {
t.Errorf("i: have %p want %p", q, p)
}
pv := sv.Field(1).(*InterfaceValue);
pv.Set(NewValue(p));
if q := s.P.(*Point); q != p {
t.Errorf("i: have %p want %p", q, p)
}
i := pv.Method(0).Call([]Value{NewValue(10)})[0].(*IntValue).Get();
if i != 250 {
t.Errorf("Interface Method returned %d; want 250", i)
}
}
type T1 struct {
a string;
int;
}
func TestAnonymousFields(t *testing.T) {
var field StructField;
var ok bool;
var t1 T1;
type1 := Typeof(t1).(*StructType);
if field, ok = type1.FieldByName("int"); !ok {
t.Error("no field 'int'")
}
if field.Index[0] != 1 {
t.Error("field index should be 1; is", field.Index)
}
}
type FTest struct {
s interface{};
name string;
index []int;
value int;
}
type D1 struct {
d int;
}
type D2 struct {
d int;
}
type S0 struct {
a, b, c int;
D1;
D2;
}
type S1 struct {
b int;
S0;
}
type S2 struct {
a int;
*S1;
}
type S1x struct {
S1;
}
type S1y struct {
S1;
}
type S3 struct {
S1x;
S2;
d, e int;
*S1y;
}
type S4 struct {
*S4;
a int;
}
var fieldTests = []FTest{
FTest{struct{}{}, "", nil, 0},
FTest{struct{}{}, "foo", nil, 0},
FTest{S0{a: 'a'}, "a", []int{0}, 'a'},
FTest{S0{}, "d", nil, 0},
FTest{S1{S0: S0{a: 'a'}}, "a", []int{1, 0}, 'a'},
FTest{S1{b: 'b'}, "b", []int{0}, 'b'},
FTest{S1{}, "S0", []int{1}, 0},
FTest{S1{S0: S0{c: 'c'}}, "c", []int{1, 2}, 'c'},
FTest{S2{a: 'a'}, "a", []int{0}, 'a'},
FTest{S2{}, "S1", []int{1}, 0},
FTest{S2{S1: &S1{b: 'b'}}, "b", []int{1, 0}, 'b'},
FTest{S2{S1: &S1{S0: S0{c: 'c'}}}, "c", []int{1, 1, 2}, 'c'},
FTest{S2{}, "d", nil, 0},
FTest{S3{}, "S1", nil, 0},
FTest{S3{S2: S2{a: 'a'}}, "a", []int{1, 0}, 'a'},
FTest{S3{}, "b", nil, 0},
FTest{S3{d: 'd'}, "d", []int{2}, 0},
FTest{S3{e: 'e'}, "e", []int{3}, 'e'},
FTest{S4{a: 'a'}, "a", []int{1}, 'a'},
FTest{S4{}, "b", nil, 0},
}
func TestFieldByIndex(t *testing.T) {
for _, test := range fieldTests {
s := Typeof(test.s).(*StructType);
f := s.FieldByIndex(test.index);
if f.Name != "" {
if test.index != nil {
if f.Name != test.name {
t.Errorf("%s.%s found; want %s", s.Name(), f.Name, test.name)
}
} else {
t.Errorf("%s.%s found", s.Name(), f.Name)
}
} else if len(test.index) > 0 {
t.Errorf("%s.%s not found", s.Name(), test.name)
}
if test.value != 0 {
v := NewValue(test.s).(*StructValue).FieldByIndex(test.index);
if v != nil {
if x, ok := v.Interface().(int); ok {
if x != test.value {
t.Errorf("%s%v is %d; want %d", s.Name(), test.index, x, test.value)
}
} else {
t.Errorf("%s%v value not an int", s.Name(), test.index)
}
} else {
t.Errorf("%s%v value not found", s.Name(), test.index)
}
}
}
}
func TestFieldByName(t *testing.T) {
for _, test := range fieldTests {
s := Typeof(test.s).(*StructType);
f, found := s.FieldByName(test.name);
if found {
if test.index != nil {
// Verify field depth and index.
if len(f.Index) != len(test.index) {
t.Errorf("%s.%s depth %d; want %d", s.Name(), test.name, len(f.Index), len(test.index))
} else {
for i, x := range f.Index {
if x != test.index[i] {
t.Errorf("%s.%s.Index[%d] is %d; want %d", s.Name(), test.name, i, x, test.index[i])
}
}
}
} else {
t.Errorf("%s.%s found", s.Name(), f.Name)
}
} else if len(test.index) > 0 {
t.Errorf("%s.%s not found", s.Name(), test.name)
}
if test.value != 0 {
v := NewValue(test.s).(*StructValue).FieldByName(test.name);
if v != nil {
if x, ok := v.Interface().(int); ok {
if x != test.value {
t.Errorf("%s.%s is %d; want %d", s.Name(), test.name, x, test.value)
}
} else {
t.Errorf("%s.%s value not an int", s.Name(), test.name)
}
} else {
t.Errorf("%s.%s value not found", s.Name(), test.name)
}
}
}
}
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