// 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 ( "container/vector" "fmt" "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{ {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) }{}, "**reflect_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 *reflect_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 "hi there" } }{}, `struct { a int8 "hi there" }`, }, {struct { x struct { a int8 "hi \x00there\t\n\"\\" } }{}, `struct { a int8 "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 { a(func(func(int) int) func(func(int)) int); b() }", }, } var valueTests = []pair{ {(int8)(0), "8"}, {(int16)(0), "16"}, {(int32)(0), "32"}, {(int64)(0), "64"}, {(uint8)(0), "8"}, {(uint16)(0), "16"}, {(uint32)(0), "32"}, {(uint64)(0), "64"}, {(float32)(0), "256.25"}, {(float64)(0), "512.125"}, {(string)(""), "stringy cheese"}, {(bool)(false), "true"}, {(*int8)(nil), "*int8(0)"}, {(**int8)(nil), "**int8(0)"}, {[5]int32{}, "[5]int32{0, 0, 0, 0, 0}"}, {(**integer)(nil), "**reflect_test.integer(0)"}, {(map[string]int32)(nil), "map[string] int32{}"}, {(chan<- string)(nil), "chan<- string"}, {struct { c chan *int32 d float32 }{}, "struct { c chan *int32; d float32 }{chan *int32, 0}", }, {(func(a int8, b int32))(nil), "func(int8, int32)(0)"}, {struct{ c func(chan *integer, *int8) }{}, "struct { c func(chan *reflect_test.integer, *int8) }{func(chan *reflect_test.integer, *int8)(0)}", }, {struct { a int8 b int32 }{}, "struct { a int8; b int32 }{0, 0}", }, {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: switch v.Type().Kind() { case Int: v.Set(132) case Int8: v.Set(8) case Int16: v.Set(16) case Int32: v.Set(32) case Int64: v.Set(64) } case *UintValue: switch v.Type().Kind() { case Uint: v.Set(132) case Uint8: v.Set(8) case Uint16: v.Set(16) case Uint32: v.Set(32) case Uint64: v.Set(64) } case *FloatValue: switch v.Type().Kind() { case Float32: v.Set(256.25) case Float64: v.Set(512.125) } case *ComplexValue: switch v.Type().Kind() { case Complex64: v.Set(532.125 + 10i) case Complex128: v.Set(564.25 + 1i) } 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: switch v.Type().Kind() { case Int: v.SetValue(NewValue(int(132))) case Int8: v.SetValue(NewValue(int8(8))) case Int16: v.SetValue(NewValue(int16(16))) case Int32: v.SetValue(NewValue(int32(32))) case Int64: v.SetValue(NewValue(int64(64))) } case *UintValue: switch v.Type().Kind() { case Uint: v.SetValue(NewValue(uint(132))) case Uint8: v.SetValue(NewValue(uint8(8))) case Uint16: v.SetValue(NewValue(uint16(16))) case Uint32: v.SetValue(NewValue(uint32(32))) case Uint64: v.SetValue(NewValue(uint64(64))) } case *FloatValue: switch v.Type().Kind() { case Float32: v.SetValue(NewValue(float32(256.25))) case Float64: v.SetValue(NewValue(512.125)) } case *ComplexValue: switch v.Type().Kind() { case Complex64: v.SetValue(NewValue(complex64(532.125 + 10i))) case Complex128: v.SetValue(NewValue(complex128(564.25 + 1i))) } 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{ {123, "123"}, {123.5, "123.5"}, {byte(123), "123"}, {"abc", "abc"}, {T{123, 456.75, "hello", &_i}, "reflect_test.T{123, 456.75, hello, *int(&7)}"}, {new(chan *T), "*chan *reflect_test.T(&chan *reflect_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(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) } ip = nil vp := NewValue(ip).(*PtrValue) vp.PointTo(vp.Elem()) if ip != nil { t.Errorf("got non-nil (%p), want nil", ip) } } func TestPtrSetNil(t *testing.T) { var i int32 = 1234 ip := &i vip := NewValue(&ip) vip.(*PtrValue).Elem().(*PtrValue).Set(nil) if ip != nil { t.Errorf("got non-nil (%d), want nil", *ip) } } func TestMapSetNil(t *testing.T) { m := make(map[string]int) vm := NewValue(&m) vm.(*PtrValue).Elem().(*MapValue).Set(nil) 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)).(*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(), "float64") } 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(), "float64") i3 := v2.Interface() if _, ok := i3.(float64); !ok { t.Error("v2.Interface() did not return float64, 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()") } var appendTests = []struct { orig, extra []int }{ {make([]int, 2, 4), []int{22}}, {make([]int, 2, 4), []int{22, 33, 44}}, } func TestAppend(t *testing.T) { for i, test := range appendTests { origLen, extraLen := len(test.orig), len(test.extra) want := append(test.orig, test.extra...) // Convert extra from []int to []Value. e0 := make([]Value, len(test.extra)) for j, e := range test.extra { e0[j] = NewValue(e) } // Convert extra from []int to *SliceValue. e1 := NewValue(test.extra).(*SliceValue) // Test Append. a0 := NewValue(test.orig).(*SliceValue) have0 := Append(a0, e0...).Interface().([]int) if !DeepEqual(have0, want) { t.Errorf("Append #%d: have %v, want %v", i, have0, want) } // Check that the orig and extra slices were not modified. if len(test.orig) != origLen { t.Errorf("Append #%d origLen: have %v, want %v", i, len(test.orig), origLen) } if len(test.extra) != extraLen { t.Errorf("Append #%d extraLen: have %v, want %v", i, len(test.extra), extraLen) } // Test AppendSlice. a1 := NewValue(test.orig).(*SliceValue) have1 := AppendSlice(a1, e1).Interface().([]int) if !DeepEqual(have1, want) { t.Errorf("AppendSlice #%d: have %v, want %v", i, have1, want) } // Check that the orig and extra slices were not modified. if len(test.orig) != origLen { t.Errorf("AppendSlice #%d origLen: have %v, want %v", i, len(test.orig), origLen) } if len(test.extra) != extraLen { t.Errorf("AppendSlice #%d extraLen: have %v, want %v", i, len(test.extra), extraLen) } } } func TestCopy(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} for i := 0; i < len(b); i++ { if b[i] != c[i] { t.Fatalf("b != c before test") } } aa := NewValue(a).(*SliceValue) ab := NewValue(b).(*SliceValue) for tocopy := 1; tocopy <= 7; tocopy++ { aa.SetLen(tocopy) Copy(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 {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}, {os.Error(nil), os.Error(nil), true}, {map[int]string{1: "one", 2: "two"}, map[int]string{2: "two", 1: "one"}, 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}, // 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}, } 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[float64]float64 } func TestDeepEqualComplexStruct(t *testing.T) { m := make(map[float64]float64) 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[float64]float64) 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 != int64(v) { t.Errorf("Key %q: have value %d, want %d", k, 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) } mv = NewValue(&m).(*PtrValue).Elem().(*MapValue) mv.Set(nil) if m != nil { t.Errorf("mv.Set(nil) failed") } } 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].(*UintValue).Get() j := ret[1].(*IntValue).Get() k := ret[2].(*UintValue).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) } i = Typeof(&p).Method(0).Func.Call([]Value{NewValue(&p), NewValue(10)})[0].(*IntValue).Get() if i != 250 { t.Errorf("Pointer 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{ {struct{}{}, "", nil, 0}, {struct{}{}, "foo", nil, 0}, {S0{a: 'a'}, "a", []int{0}, 'a'}, {S0{}, "d", nil, 0}, {S1{S0: S0{a: 'a'}}, "a", []int{1, 0}, 'a'}, {S1{b: 'b'}, "b", []int{0}, 'b'}, {S1{}, "S0", []int{1}, 0}, {S1{S0: S0{c: 'c'}}, "c", []int{1, 2}, 'c'}, {S2{a: 'a'}, "a", []int{0}, 'a'}, {S2{}, "S1", []int{1}, 0}, {S2{S1: &S1{b: 'b'}}, "b", []int{1, 0}, 'b'}, {S2{S1: &S1{S0: S0{c: 'c'}}}, "c", []int{1, 1, 2}, 'c'}, {S2{}, "d", nil, 0}, {S3{}, "S1", nil, 0}, {S3{S2: S2{a: 'a'}}, "a", []int{1, 0}, 'a'}, {S3{}, "b", nil, 0}, {S3{d: 'd'}, "d", []int{2}, 0}, {S3{e: 'e'}, "e", []int{3}, 'e'}, {S4{a: 'a'}, "a", []int{1}, 'a'}, {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) } } } } func TestImportPath(t *testing.T) { if path := Typeof(vector.Vector{}).PkgPath(); path != "libgo_container.vector" { t.Errorf("Typeof(vector.Vector{}).PkgPath() = %q, want \"libgo_container.vector\"", path) } } func TestDotDotDot(t *testing.T) { // Test example from FuncType.DotDotDot documentation. var f func(x int, y ...float64) typ := Typeof(f).(*FuncType) if typ.NumIn() == 2 && typ.In(0) == Typeof(int(0)) { sl, ok := typ.In(1).(*SliceType) if ok { if sl.Elem() == Typeof(0.0) { // ok return } } } // Failed t.Errorf("want NumIn() = 2, In(0) = int, In(1) = []float64") s := fmt.Sprintf("have NumIn() = %d", typ.NumIn()) for i := 0; i < typ.NumIn(); i++ { s += fmt.Sprintf(", In(%d) = %s", i, typ.In(i)) } t.Error(s) } type inner struct { x int } type outer struct { y int inner } func (*inner) m() {} func (*outer) m() {} func TestNestedMethods(t *testing.T) { typ := Typeof((*outer)(nil)) if typ.NumMethod() != 1 || typ.Method(0).Func.Get() != NewValue((*outer).m).(*FuncValue).Get() { t.Errorf("Wrong method table for outer: (m=%p)", (*outer).m) for i := 0; i < typ.NumMethod(); i++ { m := typ.Method(i) t.Errorf("\t%d: %s %#x\n", i, m.Name, m.Func.Get()) } } } type innerInt struct { x int } type outerInt struct { y int innerInt } func (i *innerInt) m() int { return i.x } func TestEmbeddedMethods(t *testing.T) { typ := Typeof((*outerInt)(nil)) if typ.NumMethod() != 1 || typ.Method(0).Func.Get() != NewValue((*outerInt).m).(*FuncValue).Get() { t.Errorf("Wrong method table for outerInt: (m=%p)", (*outerInt).m) for i := 0; i < typ.NumMethod(); i++ { m := typ.Method(i) t.Errorf("\t%d: %s %#x\n", i, m.Name, m.Func.Get()) } } i := &innerInt{3} if v := NewValue(i).Method(0).Call(nil)[0].(*IntValue).Get(); v != 3 { t.Errorf("i.m() = %d, want 3", v) } o := &outerInt{1, innerInt{2}} if v := NewValue(o).Method(0).Call(nil)[0].(*IntValue).Get(); v != 2 { t.Errorf("i.m() = %d, want 2", v) } f := (*outerInt).m if v := f(o); v != 2 { t.Errorf("f(o) = %d, want 2", v) } }