diff options
Diffstat (limited to 'src/pkg/reflect/all_test.go')
-rw-r--r-- | src/pkg/reflect/all_test.go | 1566 |
1 files changed, 0 insertions, 1566 deletions
diff --git a/src/pkg/reflect/all_test.go b/src/pkg/reflect/all_test.go deleted file mode 100644 index 34d74b37a..000000000 --- a/src/pkg/reflect/all_test.go +++ /dev/null @@ -1,1566 +0,0 @@ -// 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 ( - "bytes" - "container/vector" - "fmt" - "io" - "os" - . "reflect" - "runtime" - "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 `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 { reflect_test.a(func(func(int) int) func(func(int)) int); reflect_test.b() }", - }, -} - -var valueTests = []pair{ - {new(int8), "8"}, - {new(int16), "16"}, - {new(int32), "32"}, - {new(int64), "64"}, - {new(uint8), "8"}, - {new(uint16), "16"}, - {new(uint32), "32"}, - {new(uint64), "64"}, - {new(float32), "256.25"}, - {new(float64), "512.125"}, - {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), "**reflect_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)(0)"}, - {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 *reflect_test.integer, *int8) }{func(chan *reflect_test.integer, *int8)(0)}", - }, - {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 := 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, ValueOf(tt.i).Field(0).Type(), tt.s) - } -} - -func TestSet(t *testing.T) { - for i, tt := range valueTests { - v := ValueOf(tt.i).Elem() - switch v.Kind() { - case Int: - v.SetInt(132) - case Int8: - v.SetInt(8) - case Int16: - v.SetInt(16) - case Int32: - v.SetInt(32) - case Int64: - v.SetInt(64) - case Uint: - v.SetUint(132) - case Uint8: - v.SetUint(8) - case Uint16: - v.SetUint(16) - case Uint32: - v.SetUint(32) - case Uint64: - v.SetUint(64) - case Float32: - v.SetFloat(256.25) - case Float64: - v.SetFloat(512.125) - case Complex64: - v.SetComplex(532.125 + 10i) - case Complex128: - v.SetComplex(564.25 + 1i) - case String: - v.SetString("stringy cheese") - case Bool: - v.SetBool(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 := 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) - } - } -} - -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(ValueOf(test.i)) - if s != test.s { - t.Errorf("#%d: have %#q, want %#q", i, s, test.s) - } - } -} - -func TestArrayElemSet(t *testing.T) { - v := ValueOf(&[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}).Elem() - v.Index(4).SetInt(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 = ValueOf([]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}) - v.Index(4).SetInt(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 := ValueOf(&ip) - vi := ValueOf(&i).Elem() - vip.Elem().Set(vi.Addr()) - if *ip != 1234 { - t.Errorf("got %d, want 1234", *ip) - } - - ip = nil - vp := ValueOf(&ip).Elem() - vp.Set(Zero(vp.Type())) - if ip != nil { - t.Errorf("got non-nil (%p), want nil", ip) - } -} - -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 }") - styp := etyp - 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.Elem(), "int32") - - typ = TypeOf((map[string]*int32)(nil)) - testType(t, 9, typ, "map[string] *int32") - mtyp := typ - 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.Elem(), "string") - - // make sure tag strings are not part of element type - typ = TypeOf(struct { - d []uint32 `reflect:"TAG"` - }{}).Field(0).Type - testType(t, 14, typ, "[]uint32") -} - -func TestInterfaceGet(t *testing.T) { - var inter struct { - E interface{} - } - inter.E = 123.456 - v1 := ValueOf(&inter) - v2 := v1.Elem().Field(0) - assert(t, v2.Type().String(), "interface { }") - i2 := v2.Interface() - v3 := ValueOf(i2) - assert(t, v3.Type().String(), "float64") -} - -func TestInterfaceValue(t *testing.T) { - var inter struct { - E interface{} - } - inter.E = 123.456 - v1 := ValueOf(&inter) - v2 := v1.Elem().Field(0) - assert(t, v2.Type().String(), "interface { }") - v3 := v2.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) { - var x interface{} = func() {} - v := ValueOf(x) - if v.Interface() != v.Interface() || v.Interface() != x { - 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 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 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] = ValueOf(e) - } - // Convert extra from []int to *SliceValue. - e1 := ValueOf(test.extra) - // Test Append. - a0 := ValueOf(test.orig) - have0 := Append(a0, e0...).Interface().([]int) - if !sameInts(have0, want) { - t.Errorf("Append #%d: have %v, want %v (%p %p)", i, have0, want, test.orig, have0) - } - // 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 := ValueOf(test.orig) - have1 := AppendSlice(a1, e1).Interface().([]int) - if !sameInts(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") - } - } - a1 := a - b1 := b - aa := ValueOf(&a1).Elem() - ab := ValueOf(&b1).Elem() - 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 TestCopyArray(t *testing.T) { - a := [8]int{1, 2, 3, 4, 10, 9, 8, 7} - b := [11]int{11, 22, 33, 44, 1010, 99, 88, 77, 66, 55, 44} - c := b - aa := ValueOf(&a).Elem() - ab := ValueOf(&b).Elem() - Copy(ab, aa) - for i := 0; i < len(a); i++ { - if a[i] != b[i] { - t.Errorf("(i) a[%d]=%d, b[%d]=%d", i, a[i], i, b[i]) - } - } - for i := len(a); i < len(b); i++ { - if b[i] != c[i] { - t.Errorf("(ii) b[%d]=%d, c[%d]=%d", i, b[i], i, c[i]) - } else { - t.Logf("elem %d is okay\n", i) - } - } -} - -func TestBigUnnamedStruct(t *testing.T) { - b := struct{ a, b, c, d int64 }{1, 2, 3, 4} - v := ValueOf(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("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 := 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("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 -} - -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 := 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()) - } - } -} - -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") - } -} - -type UnexpT struct { - m map[int]int -} - -func TestDeepEqualUnexportedMap(t *testing.T) { - // Check that DeepEqual can look at unexported fields. - x1 := UnexpT{map[int]int{1: 2}} - x2 := UnexpT{map[int]int{1: 2}} - if !DeepEqual(&x1, &x2) { - t.Error("DeepEqual(x1, x2) = false, want true") - } - - y1 := UnexpT{map[int]int{2: 3}} - if DeepEqual(&x1, &y1) { - t.Error("DeepEqual(x1, y1) = true, want false") - } -} - - -func check2ndField(x interface{}, offs uintptr, t *testing.T) { - s := ValueOf(x) - f := s.Type().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) -} - -func Nil(a interface{}, t *testing.T) { - n := ValueOf(a).Field(0) - if !n.IsNil() { - t.Errorf("%v should be nil", a) - } -} - -func NotNil(a interface{}, t *testing.T) { - n := ValueOf(a).Field(0) - if n.IsNil() { - t.Errorf("value of type %v should not be nil", ValueOf(a).Type().String()) - } -} - -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 }{}, - } - for _, ts := range doNil { - ty := TypeOf(ts).Field(0).Type - 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) -} - -func TestInterfaceExtraction(t *testing.T) { - var s struct { - w io.Writer - } - - s.w = os.Stdout - v := Indirect(ValueOf(&s)).Field(0).Interface() - if v != s.w.(interface{}) { - t.Error("Interface() on interface: ", v, s.w) - } -} - -func TestNilPtrValueSub(t *testing.T) { - var pi *int - if pv := ValueOf(pi); pv.Elem().IsValid() { - t.Error("ValueOf((*int)(nil)).Elem().IsValid()") - } -} - -func TestMap(t *testing.T) { - m := map[string]int{"a": 1, "b": 2} - mv := ValueOf(m) - if n := mv.Len(); n != len(m) { - t.Errorf("Len = %d, want %d", n, len(m)) - } - keys := mv.MapKeys() - i := 0 - newmap := MakeMap(mv.Type()) - 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]; kv.String() != k { - t.Errorf("Keys[%q] = %d, want %d", i, kv.Int(), k) - } - i++ - - // Check that value lookup is correct. - vv := mv.MapIndex(ValueOf(k)) - if vi := vv.Int(); vi != int64(v) { - t.Errorf("Key %q: have value %d, want %d", k, vi, v) - } - - // Copy into new map. - newmap.SetMapIndex(ValueOf(k), ValueOf(v)) - } - vv := mv.MapIndex(ValueOf("not-present")) - if vv.IsValid() { - 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.SetMapIndex(ValueOf("a"), Value{}) - v, ok := newm["a"] - if ok { - t.Errorf("newm[\"a\"] = %d after delete", v) - } - - mv = ValueOf(&m).Elem() - mv.Set(Zero(mv.Type())) - 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 Value - - // check both ways to allocate channels - switch loop { - case 1: - c = make(chan int, 1) - cv = ValueOf(c) - case 0: - cv = MakeChan(TypeOf(c), 1) - c = cv.Interface().(chan int) - } - - // Send - cv.Send(ValueOf(2)) - if i := <-c; i != 2 { - t.Errorf("reflect Send 2, native recv %d", i) - } - - // Recv - c <- 3 - if i, ok := cv.Recv(); i.Int() != 3 || !ok { - t.Errorf("native send 3, reflect Recv %d, %t", i.Int(), ok) - } - - // TryRecv fail - val, ok := cv.TryRecv() - if val.IsValid() || ok { - t.Errorf("TryRecv on empty chan: %s, %t", valueToString(val), ok) - } - - // TryRecv success - c <- 4 - val, ok = cv.TryRecv() - if !val.IsValid() { - t.Errorf("TryRecv on ready chan got nil") - } else if i := val.Int(); i != 4 || !ok { - t.Errorf("native send 4, TryRecv %d, %t", i, ok) - } - - // TrySend fail - c <- 100 - ok = cv.TrySend(ValueOf(5)) - i := <-c - if ok { - t.Errorf("TrySend on full chan succeeded: value %d", i) - } - - // TrySend success - ok = cv.TrySend(ValueOf(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 i, ok := cv.Recv(); i.Int() != 123 || !ok { - t.Errorf("send 123 then close; Recv %d, %t", i.Int(), ok) - } - if i, ok := cv.Recv(); i.Int() != 0 || ok { - t.Errorf("after close Recv %d, %t", i.Int(), ok) - } - } - - // check creation of unbuffered channel - var c chan int - cv := MakeChan(TypeOf(c), 0) - c = cv.Interface().(chan int) - if cv.TrySend(ValueOf(7)) { - t.Errorf("TrySend on sync chan succeeded") - } - if v, ok := cv.TryRecv(); v.IsValid() || ok { - t.Errorf("TryRecv on sync chan succeeded: isvalid=%v ok=%v", v.IsValid(), ok) - } - - // len/cap - cv = MakeChan(TypeOf(c), 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 := ValueOf(dummy).Call([]Value{ValueOf(byte(10)), ValueOf(20), ValueOf(byte(30))}) - if len(ret) != 3 { - t.Fatalf("Call returned %d values, want 3", len(ret)) - } - - i := byte(ret[0].Uint()) - j := int(ret[1].Int()) - k := byte(ret[2].Uint()) - 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 -} - -// 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 -} - -func TestMethod(t *testing.T) { - // Non-curried method of type. - p := Point{3, 4} - i := TypeOf(p).Method(1).Func.Call([]Value{ValueOf(p), ValueOf(10)})[0].Int() - if i != 250 { - t.Errorf("Type Method returned %d; want 250", i) - } - - m, ok := TypeOf(p).MethodByName("Dist") - if !ok { - t.Fatalf("method by name failed") - } - m.Func.Call([]Value{ValueOf(p), ValueOf(10)})[0].Int() - if i != 250 { - t.Errorf("Type MethodByName returned %d; want 250", i) - } - - i = TypeOf(&p).Method(1).Func.Call([]Value{ValueOf(&p), ValueOf(10)})[0].Int() - if i != 250 { - t.Errorf("Pointer Type Method returned %d; want 250", i) - } - - m, ok = TypeOf(&p).MethodByName("Dist") - if !ok { - t.Fatalf("ptr method by name failed") - } - i = m.Func.Call([]Value{ValueOf(&p), ValueOf(10)})[0].Int() - if i != 250 { - t.Errorf("Pointer Type MethodByName returned %d; want 250", i) - } - - // Curried method of value. - i = ValueOf(p).Method(1).Call([]Value{ValueOf(10)})[0].Int() - if i != 250 { - t.Errorf("Value Method returned %d; want 250", i) - } - i = ValueOf(p).MethodByName("Dist").Call([]Value{ValueOf(10)})[0].Int() - if i != 250 { - t.Errorf("Value MethodByName returned %d; want 250", i) - } - - // Curried method of pointer. - i = ValueOf(&p).Method(1).Call([]Value{ValueOf(10)})[0].Int() - if i != 250 { - t.Errorf("Pointer Value Method returned %d; want 250", i) - } - i = ValueOf(&p).MethodByName("Dist").Call([]Value{ValueOf(10)})[0].Int() - if i != 250 { - t.Errorf("Pointer Value MethodByName 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 ValueOf directly would - // access the underlying Point, not the interface. - var s = struct { - X interface { - Dist(int) int - } - }{p} - pv := ValueOf(s).Field(0) - i = pv.Method(0).Call([]Value{ValueOf(10)})[0].Int() - if i != 250 { - t.Errorf("Interface Method returned %d; want 250", i) - } - i = pv.MethodByName("Dist").Call([]Value{ValueOf(10)})[0].Int() - if i != 250 { - t.Errorf("Interface MethodByName 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 := ValueOf(&s).Elem() - sv.Field(0).Set(ValueOf(p)) - if q := s.I.(*Point); q != p { - t.Errorf("i: have %p want %p", q, p) - } - - pv := sv.Field(1) - pv.Set(ValueOf(p)) - if q := s.P.(*Point); q != p { - t.Errorf("i: have %p want %p", q, p) - } - - i := pv.Method(0).Call([]Value{ValueOf(10)})[0].Int() - 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) - 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) - 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 := ValueOf(test.s).FieldByIndex(test.index) - if v.IsValid() { - 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) - 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 := ValueOf(test.s).FieldByName(test.name) - if v.IsValid() { - 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 != "container/vector" { - t.Errorf("TypeOf(vector.Vector{}).PkgPath() = %q, want \"container/vector\"", path) - } -} - -func TestDotDotDot(t *testing.T) { - // Test example from FuncType.DotDotDot documentation. - var f func(x int, y ...float64) - typ := TypeOf(f) - if typ.NumIn() == 2 && typ.In(0) == TypeOf(int(0)) { - sl := typ.In(1) - if sl.Kind() == Slice { - 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.Pointer() != ValueOf((*outer).m).Pointer() { - 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.Pointer()) - } - } -} - -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.Pointer() != ValueOf((*OuterInt).M).Pointer() { - 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.Pointer()) - } - } - - i := &InnerInt{3} - if v := ValueOf(i).Method(0).Call(nil)[0].Int(); v != 3 { - t.Errorf("i.M() = %d, want 3", v) - } - - o := &OuterInt{1, InnerInt{2}} - if v := ValueOf(o).Method(0).Call(nil)[0].Int(); 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) - } -} - -func TestPtrTo(t *testing.T) { - var i int - - typ := TypeOf(i) - for i = 0; i < 100; i++ { - typ = PtrTo(typ) - } - for i = 0; i < 100; i++ { - typ = typ.Elem() - } - if typ != TypeOf(i) { - t.Errorf("after 100 PtrTo and Elem, have %s, want %s", typ, TypeOf(i)) - } -} - -func TestAddr(t *testing.T) { - var p struct { - X, Y int - } - - v := ValueOf(&p) - v = v.Elem() - v = v.Addr() - v = v.Elem() - v = v.Field(0) - v.SetInt(2) - if p.X != 2 { - t.Errorf("Addr.Elem.Set failed to set value") - } - - // Again but take address of the ValueOf value. - // Exercises generation of PtrTypes not present in the binary. - q := &p - v = ValueOf(&q).Elem() - v = v.Addr() - v = v.Elem() - v = v.Elem() - v = v.Addr() - v = v.Elem() - v = v.Field(0) - v.SetInt(3) - if p.X != 3 { - t.Errorf("Addr.Elem.Set failed to set value") - } - - // Starting without pointer we should get changed value - // in interface. - qq := p - v = ValueOf(&qq).Elem() - v0 := v - v = v.Addr() - v = v.Elem() - v = v.Field(0) - v.SetInt(4) - if p.X != 3 { // should be unchanged from last time - t.Errorf("somehow value Set changed original p") - } - p = v0.Interface().(struct { - X, Y int - }) - if p.X != 4 { - t.Errorf("Addr.Elem.Set valued to set value in top value") - } -} - -func noAlloc(t *testing.T, n int, f func(int)) { - // once to prime everything - f(-1) - runtime.MemStats.Mallocs = 0 - - for j := 0; j < n; j++ { - f(j) - } - // A few allocs may happen in the testing package when GOMAXPROCS > 1, so don't - // require zero mallocs. - if runtime.MemStats.Mallocs > 5 { - t.Fatalf("%d mallocs after %d iterations", runtime.MemStats.Mallocs, n) - } -} - -func TestAllocations(t *testing.T) { - noAlloc(t, 100, func(j int) { - var i interface{} - var v Value - i = 42 + j - v = ValueOf(i) - if int(v.Int()) != 42+j { - panic("wrong int") - } - }) -} - -func TestSmallNegativeInt(t *testing.T) { - i := int16(-1) - v := ValueOf(i) - if v.Int() != -1 { - t.Errorf("int16(-1).Int() returned %v", v.Int()) - } -} - -func TestSlice(t *testing.T) { - xs := []int{1, 2, 3, 4, 5, 6, 7, 8} - v := ValueOf(xs).Slice(3, 5).Interface().([]int) - if len(v) != 2 || v[0] != 4 || v[1] != 5 { - t.Errorf("xs.Slice(3, 5) = %v", v) - } - - xa := [7]int{10, 20, 30, 40, 50, 60, 70} - v = ValueOf(&xa).Elem().Slice(2, 5).Interface().([]int) - if len(v) != 3 || v[0] != 30 || v[1] != 40 || v[2] != 50 { - t.Errorf("xa.Slice(2, 5) = %v", v) - } -} - -func TestVariadic(t *testing.T) { - var b bytes.Buffer - V := ValueOf - - b.Reset() - V(fmt.Fprintf).Call([]Value{V(&b), V("%s, %d world"), V("hello"), V(42)}) - if b.String() != "hello, 42 world" { - t.Errorf("after Fprintf Call: %q != %q", b.String(), "hello 42 world") - } - - b.Reset() - V(fmt.Fprintf).CallSlice([]Value{V(&b), V("%s, %d world"), V([]interface{}{"hello", 42})}) - if b.String() != "hello, 42 world" { - t.Errorf("after Fprintf CallSlice: %q != %q", b.String(), "hello 42 world") - } -} - -var tagGetTests = []struct { - Tag StructTag - Key string - Value string -}{ - {`protobuf:"PB(1,2)"`, `protobuf`, `PB(1,2)`}, - {`protobuf:"PB(1,2)"`, `foo`, ``}, - {`protobuf:"PB(1,2)"`, `rotobuf`, ``}, - {`protobuf:"PB(1,2)" json:"name"`, `json`, `name`}, - {`protobuf:"PB(1,2)" json:"name"`, `protobuf`, `PB(1,2)`}, -} - -func TestTagGet(t *testing.T) { - for _, tt := range tagGetTests { - if v := tt.Tag.Get(tt.Key); v != tt.Value { - t.Errorf("StructTag(%#q).Get(%#q) = %#q, want %#q", tt.Tag, tt.Key, v, tt.Value) - } - } -} |