URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgo/] [go/] [encoding/] [gob/] [encoder_test.go] - Blame information for rev 747

Details | Compare with Previous | View Log


// 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 gob
 
import (
        "bytes"
        "fmt"
        "io"
        "reflect"
        "strings"
        "testing"
)
 
type ET2 struct {
        X string
}
 
type ET1 struct {
        A    int
        Et2  *ET2
        Next *ET1
}
 
// Like ET1 but with a different name for a field
type ET3 struct {
        A             int
        Et2           *ET2
        DifferentNext *ET1
}
 
// Like ET1 but with a different type for a field
type ET4 struct {
        A    int
        Et2  float64
        Next int
}
 
func TestEncoderDecoder(t *testing.T) {
        b := new(bytes.Buffer)
        enc := NewEncoder(b)
        et1 := new(ET1)
        et1.A = 7
        et1.Et2 = new(ET2)
        err := enc.Encode(et1)
        if err != nil {
                t.Error("encoder fail:", err)
        }
        dec := NewDecoder(b)
        newEt1 := new(ET1)
        err = dec.Decode(newEt1)
        if err != nil {
                t.Fatal("error decoding ET1:", err)
        }
 
        if !reflect.DeepEqual(et1, newEt1) {
                t.Fatalf("invalid data for et1: expected %+v; got %+v", *et1, *newEt1)
        }
        if b.Len() != 0 {
                t.Error("not at eof;", b.Len(), "bytes left")
        }
 
        enc.Encode(et1)
        newEt1 = new(ET1)
        err = dec.Decode(newEt1)
        if err != nil {
                t.Fatal("round 2: error decoding ET1:", err)
        }
        if !reflect.DeepEqual(et1, newEt1) {
                t.Fatalf("round 2: invalid data for et1: expected %+v; got %+v", *et1, *newEt1)
        }
        if b.Len() != 0 {
                t.Error("round 2: not at eof;", b.Len(), "bytes left")
        }
 
        // Now test with a running encoder/decoder pair that we recognize a type mismatch.
        err = enc.Encode(et1)
        if err != nil {
                t.Error("round 3: encoder fail:", err)
        }
        newEt2 := new(ET2)
        err = dec.Decode(newEt2)
        if err == nil {
                t.Fatal("round 3: expected `bad type' error decoding ET2")
        }
}
 
// Run one value through the encoder/decoder, but use the wrong type.
// Input is always an ET1; we compare it to whatever is under 'e'.
func badTypeCheck(e interface{}, shouldFail bool, msg string, t *testing.T) {
        b := new(bytes.Buffer)
        enc := NewEncoder(b)
        et1 := new(ET1)
        et1.A = 7
        et1.Et2 = new(ET2)
        err := enc.Encode(et1)
        if err != nil {
                t.Error("encoder fail:", err)
        }
        dec := NewDecoder(b)
        err = dec.Decode(e)
        if shouldFail && err == nil {
                t.Error("expected error for", msg)
        }
        if !shouldFail && err != nil {
                t.Error("unexpected error for", msg, err)
        }
}
 
// Test that we recognize a bad type the first time.
func TestWrongTypeDecoder(t *testing.T) {
        badTypeCheck(new(ET2), true, "no fields in common", t)
        badTypeCheck(new(ET3), false, "different name of field", t)
        badTypeCheck(new(ET4), true, "different type of field", t)
}
 
func corruptDataCheck(s string, err error, t *testing.T) {
        b := bytes.NewBufferString(s)
        dec := NewDecoder(b)
        err1 := dec.Decode(new(ET2))
        if err1 != err {
                t.Errorf("from %q expected error %s; got %s", s, err, err1)
        }
}
 
// Check that we survive bad data.
func TestBadData(t *testing.T) {
        corruptDataCheck("", io.EOF, t)
        corruptDataCheck("\x7Fhi", io.ErrUnexpectedEOF, t)
        corruptDataCheck("\x03now is the time for all good men", errBadType, t)
}
 
// Types not supported by the Encoder.
var unsupportedValues = []interface{}{
        make(chan int),
        func(a int) bool { return true },
}
 
func TestUnsupported(t *testing.T) {
        var b bytes.Buffer
        enc := NewEncoder(&b)
        for _, v := range unsupportedValues {
                err := enc.Encode(v)
                if err == nil {
                        t.Errorf("expected error for %T; got none", v)
                }
        }
}
 
func encAndDec(in, out interface{}) error {
        b := new(bytes.Buffer)
        enc := NewEncoder(b)
        err := enc.Encode(in)
        if err != nil {
                return err
        }
        dec := NewDecoder(b)
        err = dec.Decode(out)
        if err != nil {
                return err
        }
        return nil
}
 
func TestTypeToPtrType(t *testing.T) {
        // Encode a T, decode a *T
        type Type0 struct {
                A int
        }
        t0 := Type0{7}
        t0p := new(Type0)
        if err := encAndDec(t0, t0p); err != nil {
                t.Error(err)
        }
}
 
func TestPtrTypeToType(t *testing.T) {
        // Encode a *T, decode a T
        type Type1 struct {
                A uint
        }
        t1p := &Type1{17}
        var t1 Type1
        if err := encAndDec(t1, t1p); err != nil {
                t.Error(err)
        }
}
 
func TestTypeToPtrPtrPtrPtrType(t *testing.T) {
        type Type2 struct {
                A ****float64
        }
        t2 := Type2{}
        t2.A = new(***float64)
        *t2.A = new(**float64)
        **t2.A = new(*float64)
        ***t2.A = new(float64)
        ****t2.A = 27.4
        t2pppp := new(***Type2)
        if err := encAndDec(t2, t2pppp); err != nil {
                t.Fatal(err)
        }
        if ****(****t2pppp).A != ****t2.A {
                t.Errorf("wrong value after decode: %g not %g", ****(****t2pppp).A, ****t2.A)
        }
}
 
func TestSlice(t *testing.T) {
        type Type3 struct {
                A []string
        }
        t3p := &Type3{[]string{"hello", "world"}}
        var t3 Type3
        if err := encAndDec(t3, t3p); err != nil {
                t.Error(err)
        }
}
 
func TestValueError(t *testing.T) {
        // Encode a *T, decode a T
        type Type4 struct {
                A int
        }
        t4p := &Type4{3}
        var t4 Type4 // note: not a pointer.
        if err := encAndDec(t4p, t4); err == nil || strings.Index(err.Error(), "pointer") < 0 {
                t.Error("expected error about pointer; got", err)
        }
}
 
func TestArray(t *testing.T) {
        type Type5 struct {
                A [3]string
                B [3]byte
        }
        type Type6 struct {
                A [2]string // can't hold t5.a
        }
        t5 := Type5{[3]string{"hello", ",", "world"}, [3]byte{1, 2, 3}}
        var t5p Type5
        if err := encAndDec(t5, &t5p); err != nil {
                t.Error(err)
        }
        var t6 Type6
        if err := encAndDec(t5, &t6); err == nil {
                t.Error("should fail with mismatched array sizes")
        }
}
 
func TestRecursiveMapType(t *testing.T) {
        type recursiveMap map[string]recursiveMap
        r1 := recursiveMap{"A": recursiveMap{"B": nil, "C": nil}, "D": nil}
        r2 := make(recursiveMap)
        if err := encAndDec(r1, &r2); err != nil {
                t.Error(err)
        }
}
 
func TestRecursiveSliceType(t *testing.T) {
        type recursiveSlice []recursiveSlice
        r1 := recursiveSlice{0: recursiveSlice{0: nil}, 1: nil}
        r2 := make(recursiveSlice, 0)
        if err := encAndDec(r1, &r2); err != nil {
                t.Error(err)
        }
}
 
// Regression test for bug: must send zero values inside arrays
func TestDefaultsInArray(t *testing.T) {
        type Type7 struct {
                B []bool
                I []int
                S []string
                F []float64
        }
        t7 := Type7{
                []bool{false, false, true},
                []int{0, 0, 1},
                []string{"hi", "", "there"},
                []float64{0, 0, 1},
        }
        var t7p Type7
        if err := encAndDec(t7, &t7p); err != nil {
                t.Error(err)
        }
}
 
var testInt int
var testFloat32 float32
var testString string
var testSlice []string
var testMap map[string]int
var testArray [7]int
 
type SingleTest struct {
        in  interface{}
        out interface{}
        err string
}
 
var singleTests = []SingleTest{
        {17, &testInt, ""},
        {float32(17.5), &testFloat32, ""},
        {"bike shed", &testString, ""},
        {[]string{"bike", "shed", "paint", "color"}, &testSlice, ""},
        {map[string]int{"seven": 7, "twelve": 12}, &testMap, ""},
        {[7]int{4, 55, 0, 0, 0, 0, 0}, &testArray, ""}, // case that once triggered a bug
        {[7]int{4, 55, 1, 44, 22, 66, 1234}, &testArray, ""},
 
        // Decode errors
        {172, &testFloat32, "type"},
}
 
func TestSingletons(t *testing.T) {
        b := new(bytes.Buffer)
        enc := NewEncoder(b)
        dec := NewDecoder(b)
        for _, test := range singleTests {
                b.Reset()
                err := enc.Encode(test.in)
                if err != nil {
                        t.Errorf("error encoding %v: %s", test.in, err)
                        continue
                }
                err = dec.Decode(test.out)
                switch {
                case err != nil && test.err == "":
                        t.Errorf("error decoding %v: %s", test.in, err)
                        continue
                case err == nil && test.err != "":
                        t.Errorf("expected error decoding %v: %s", test.in, test.err)
                        continue
                case err != nil && test.err != "":
                        if strings.Index(err.Error(), test.err) < 0 {
                                t.Errorf("wrong error decoding %v: wanted %s, got %v", test.in, test.err, err)
                        }
                        continue
                }
                // Get rid of the pointer in the rhs
                val := reflect.ValueOf(test.out).Elem().Interface()
                if !reflect.DeepEqual(test.in, val) {
                        t.Errorf("decoding singleton: expected %v got %v", test.in, val)
                }
        }
}
 
func TestStructNonStruct(t *testing.T) {
        type Struct struct {
                A string
        }
        type NonStruct string
        s := Struct{"hello"}
        var sp Struct
        if err := encAndDec(s, &sp); err != nil {
                t.Error(err)
        }
        var ns NonStruct
        if err := encAndDec(s, &ns); err == nil {
                t.Error("should get error for struct/non-struct")
        } else if strings.Index(err.Error(), "type") < 0 {
                t.Error("for struct/non-struct expected type error; got", err)
        }
        // Now try the other way
        var nsp NonStruct
        if err := encAndDec(ns, &nsp); err != nil {
                t.Error(err)
        }
        if err := encAndDec(ns, &s); err == nil {
                t.Error("should get error for non-struct/struct")
        } else if strings.Index(err.Error(), "type") < 0 {
                t.Error("for non-struct/struct expected type error; got", err)
        }
}
 
type interfaceIndirectTestI interface {
        F() bool
}
 
type interfaceIndirectTestT struct{}
 
func (this *interfaceIndirectTestT) F() bool {
        return true
}
 
// A version of a bug reported on golang-nuts.  Also tests top-level
// slice of interfaces.  The issue was registering *T caused T to be
// stored as the concrete type.
func TestInterfaceIndirect(t *testing.T) {
        Register(&interfaceIndirectTestT{})
        b := new(bytes.Buffer)
        w := []interfaceIndirectTestI{&interfaceIndirectTestT{}}
        err := NewEncoder(b).Encode(w)
        if err != nil {
                t.Fatal("encode error:", err)
        }
 
        var r []interfaceIndirectTestI
        err = NewDecoder(b).Decode(&r)
        if err != nil {
                t.Fatal("decode error:", err)
        }
}
 
// Now follow various tests that decode into things that can't represent the
// encoded value, all of which should be legal.
 
// Also, when the ignored object contains an interface value, it may define
// types. Make sure that skipping the value still defines the types by using
// the encoder/decoder pair to send a value afterwards.  If an interface
// is sent, its type in the test is always NewType0, so this checks that the
// encoder and decoder don't skew with respect to type definitions.
 
type Struct0 struct {
        I interface{}
}
 
type NewType0 struct {
        S string
}
 
type ignoreTest struct {
        in, out interface{}
}
 
var ignoreTests = []ignoreTest{
        // Decode normal struct into an empty struct
        {&struct{ A int }{23}, &struct{}{}},
        // Decode normal struct into a nil.
        {&struct{ A int }{23}, nil},
        // Decode singleton string into a nil.
        {"hello, world", nil},
        // Decode singleton slice into a nil.
        {[]int{1, 2, 3, 4}, nil},
        // Decode struct containing an interface into a nil.
        {&Struct0{&NewType0{"value0"}}, nil},
        // Decode singleton slice of interfaces into a nil.
        {[]interface{}{"hi", &NewType0{"value1"}, 23}, nil},
}
 
func TestDecodeIntoNothing(t *testing.T) {
        Register(new(NewType0))
        for i, test := range ignoreTests {
                b := new(bytes.Buffer)
                enc := NewEncoder(b)
                err := enc.Encode(test.in)
                if err != nil {
                        t.Errorf("%d: encode error %s:", i, err)
                        continue
                }
                dec := NewDecoder(b)
                err = dec.Decode(test.out)
                if err != nil {
                        t.Errorf("%d: decode error: %s", i, err)
                        continue
                }
                // Now see if the encoder and decoder are in a consistent state.
                str := fmt.Sprintf("Value %d", i)
                err = enc.Encode(&NewType0{str})
                if err != nil {
                        t.Fatalf("%d: NewType0 encode error: %s", i, err)
                }
                ns := new(NewType0)
                err = dec.Decode(ns)
                if err != nil {
                        t.Fatalf("%d: NewType0 decode error: %s", i, err)
                }
                if ns.S != str {
                        t.Fatalf("%d: expected %q got %q", i, str, ns.S)
                }
        }
}
 
// Another bug from golang-nuts, involving nested interfaces.
type Bug0Outer struct {
        Bug0Field interface{}
}
 
type Bug0Inner struct {
        A int
}
 
func TestNestedInterfaces(t *testing.T) {
        var buf bytes.Buffer
        e := NewEncoder(&buf)
        d := NewDecoder(&buf)
        Register(new(Bug0Outer))
        Register(new(Bug0Inner))
        f := &Bug0Outer{&Bug0Outer{&Bug0Inner{7}}}
        var v interface{} = f
        err := e.Encode(&v)
        if err != nil {
                t.Fatal("Encode:", err)
        }
        err = d.Decode(&v)
        if err != nil {
                t.Fatal("Decode:", err)
        }
        // Make sure it decoded correctly.
        outer1, ok := v.(*Bug0Outer)
        if !ok {
                t.Fatalf("v not Bug0Outer: %T", v)
        }
        outer2, ok := outer1.Bug0Field.(*Bug0Outer)
        if !ok {
                t.Fatalf("v.Bug0Field not Bug0Outer: %T", outer1.Bug0Field)
        }
        inner, ok := outer2.Bug0Field.(*Bug0Inner)
        if !ok {
                t.Fatalf("v.Bug0Field.Bug0Field not Bug0Inner: %T", outer2.Bug0Field)
        }
        if inner.A != 7 {
                t.Fatalf("final value %d; expected %d", inner.A, 7)
        }
}
 
// The bugs keep coming. We forgot to send map subtypes before the map.
 
type Bug1Elem struct {
        Name string
        Id   int
}
 
type Bug1StructMap map[string]Bug1Elem
 
func bug1EncDec(in Bug1StructMap, out *Bug1StructMap) error {
        return nil
}
 
func TestMapBug1(t *testing.T) {
        in := make(Bug1StructMap)
        in["val1"] = Bug1Elem{"elem1", 1}
        in["val2"] = Bug1Elem{"elem2", 2}
 
        b := new(bytes.Buffer)
        enc := NewEncoder(b)
        err := enc.Encode(in)
        if err != nil {
                t.Fatal("encode:", err)
        }
        dec := NewDecoder(b)
        out := make(Bug1StructMap)
        err = dec.Decode(&out)
        if err != nil {
                t.Fatal("decode:", err)
        }
        if !reflect.DeepEqual(in, out) {
                t.Errorf("mismatch: %v %v", in, out)
        }
}
 
func TestGobMapInterfaceEncode(t *testing.T) {
        m := map[string]interface{}{
                "up": uintptr(0),
                "i0": []int{-1},
                "i1": []int8{-1},
                "i2": []int16{-1},
                "i3": []int32{-1},
                "i4": []int64{-1},
                "u0": []uint{1},
                "u1": []uint8{1},
                "u2": []uint16{1},
                "u3": []uint32{1},
                "u4": []uint64{1},
                "f0": []float32{1},
                "f1": []float64{1},
                "c0": []complex64{complex(2, -2)},
                "c1": []complex128{complex(2, float64(-2))},
                "us": []uintptr{0},
                "bo": []bool{false},
                "st": []string{"s"},
        }
        enc := NewEncoder(new(bytes.Buffer))
        err := enc.Encode(m)
        if err != nil {
                t.Errorf("encode map: %s", err)
        }
}
 
func TestSliceReusesMemory(t *testing.T) {
        buf := new(bytes.Buffer)
        // Bytes
        {
                x := []byte("abcd")
                enc := NewEncoder(buf)
                err := enc.Encode(x)
                if err != nil {
                        t.Errorf("bytes: encode: %s", err)
                }
                // Decode into y, which is big enough.
                y := []byte("ABCDE")
                addr := &y[0]
                dec := NewDecoder(buf)
                err = dec.Decode(&y)
                if err != nil {
                        t.Fatal("bytes: decode:", err)
                }
                if !bytes.Equal(x, y) {
                        t.Errorf("bytes: expected %q got %q\n", x, y)
                }
                if addr != &y[0] {
                        t.Errorf("bytes: unnecessary reallocation")
                }
        }
        // general slice
        {
                x := []rune("abcd")
                enc := NewEncoder(buf)
                err := enc.Encode(x)
                if err != nil {
                        t.Errorf("ints: encode: %s", err)
                }
                // Decode into y, which is big enough.
                y := []rune("ABCDE")
                addr := &y[0]
                dec := NewDecoder(buf)
                err = dec.Decode(&y)
                if err != nil {
                        t.Fatal("ints: decode:", err)
                }
                if !reflect.DeepEqual(x, y) {
                        t.Errorf("ints: expected %q got %q\n", x, y)
                }
                if addr != &y[0] {
                        t.Errorf("ints: unnecessary reallocation")
                }
        }
}
 
// Used to crash: negative count in recvMessage.
func TestBadCount(t *testing.T) {
        b := []byte{0xfb, 0xa5, 0x82, 0x2f, 0xca, 0x1}
        if err := NewDecoder(bytes.NewBuffer(b)).Decode(nil); err == nil {
                t.Error("expected error from bad count")
        } else if err.Error() != errBadCount.Error() {
                t.Error("expected bad count error; got", err)
        }
}
 
// Verify that sequential Decoders built on a single input will
// succeed if the input implements ReadByte and there is no
// type information in the stream.
func TestSequentialDecoder(t *testing.T) {
        b := new(bytes.Buffer)
        enc := NewEncoder(b)
        const count = 10
        for i := 0; i < count; i++ {
                s := fmt.Sprintf("%d", i)
                if err := enc.Encode(s); err != nil {
                        t.Error("encoder fail:", err)
                }
        }
        for i := 0; i < count; i++ {
                dec := NewDecoder(b)
                var s string
                if err := dec.Decode(&s); err != nil {
                        t.Fatal("decoder fail:", err)
                }
                if s != fmt.Sprintf("%d", i) {
                        t.Fatalf("decode expected %d got %s", i, s)
                }
        }
}
 
// Should be able to have unrepresentable fields (chan, func) as long as they
// are unexported.
type Bug2 struct {
        A int
        b chan int
}
 
func TestUnexportedChan(t *testing.T) {
        b := Bug2{23, make(chan int)}
        var stream bytes.Buffer
        enc := NewEncoder(&stream)
        if err := enc.Encode(b); err != nil {
                t.Fatalf("error encoding unexported channel: %s", err)
        }
}
 
func TestSliceIncompatibility(t *testing.T) {
        var in = []byte{1, 2, 3}
        var out []int
        if err := encAndDec(in, &out); err == nil {
                t.Error("expected compatibility error")
        }
}

Browse

Tools

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgo/] [go/] [encoding/] [gob/] [encoder_test.go] - Blame information for rev 747

Line No.	Rev	Author	Line
1	747	jeremybenn	`// Copyright 2009 The Go Authors. All rights reserved.`
2			`// Use of this source code is governed by a BSD-style`
3			`// license that can be found in the LICENSE file.`
4
5			`package gob`
6
7			`import (`
8			`"bytes"`
9			`"fmt"`
10			`"io"`
11			`"reflect"`
12			`"strings"`
13			`"testing"`
14			`)`
15
16			`type ET2 struct {`
17			`X string`
18			`}`
19
20			`type ET1 struct {`
21			`A int`
22			`Et2 *ET2`
23			`Next *ET1`
24			`}`
25
26			`// Like ET1 but with a different name for a field`
27			`type ET3 struct {`
28			`A int`
29			`Et2 *ET2`
30			`DifferentNext *ET1`
31			`}`
32
33			`// Like ET1 but with a different type for a field`
34			`type ET4 struct {`
35			`A int`
36			`Et2 float64`
37			`Next int`
38			`}`
39
40			`func TestEncoderDecoder(t *testing.T) {`
41			`b := new(bytes.Buffer)`
42			`enc := NewEncoder(b)`
43			`et1 := new(ET1)`
44			`et1.A = 7`
45			`et1.Et2 = new(ET2)`
46			`err := enc.Encode(et1)`
47			`if err != nil {`
48			`t.Error("encoder fail:", err)`
49			`}`
50			`dec := NewDecoder(b)`
51			`newEt1 := new(ET1)`
52			`err = dec.Decode(newEt1)`
53			`if err != nil {`
54			`t.Fatal("error decoding ET1:", err)`
55			`}`
56
57			`if !reflect.DeepEqual(et1, newEt1) {`
58			`t.Fatalf("invalid data for et1: expected %+v; got %+v", et1, newEt1)`
59			`}`
60			`if b.Len() != 0 {`
61			`t.Error("not at eof;", b.Len(), "bytes left")`
62			`}`
63
64			`enc.Encode(et1)`
65			`newEt1 = new(ET1)`
66			`err = dec.Decode(newEt1)`
67			`if err != nil {`
68			`t.Fatal("round 2: error decoding ET1:", err)`
69			`}`
70			`if !reflect.DeepEqual(et1, newEt1) {`
71			`t.Fatalf("round 2: invalid data for et1: expected %+v; got %+v", et1, newEt1)`
72			`}`
73			`if b.Len() != 0 {`
74			`t.Error("round 2: not at eof;", b.Len(), "bytes left")`
75			`}`
76
77			`// Now test with a running encoder/decoder pair that we recognize a type mismatch.`
78			`err = enc.Encode(et1)`
79			`if err != nil {`
80			`t.Error("round 3: encoder fail:", err)`
81			`}`
82			`newEt2 := new(ET2)`
83			`err = dec.Decode(newEt2)`
84			`if err == nil {`
85			t.Fatal("round 3: expected `bad type' error decoding ET2")
86			`}`
87			`}`
88
89			`// Run one value through the encoder/decoder, but use the wrong type.`
90			`// Input is always an ET1; we compare it to whatever is under 'e'.`
91			`func badTypeCheck(e interface{}, shouldFail bool, msg string, t *testing.T) {`
92			`b := new(bytes.Buffer)`
93			`enc := NewEncoder(b)`
94			`et1 := new(ET1)`
95			`et1.A = 7`
96			`et1.Et2 = new(ET2)`
97			`err := enc.Encode(et1)`
98			`if err != nil {`
99			`t.Error("encoder fail:", err)`
100			`}`
101			`dec := NewDecoder(b)`
102			`err = dec.Decode(e)`
103			`if shouldFail && err == nil {`
104			`t.Error("expected error for", msg)`
105			`}`
106			`if !shouldFail && err != nil {`
107			`t.Error("unexpected error for", msg, err)`
108			`}`
109			`}`
110
111			`// Test that we recognize a bad type the first time.`
112			`func TestWrongTypeDecoder(t *testing.T) {`
113			`badTypeCheck(new(ET2), true, "no fields in common", t)`
114			`badTypeCheck(new(ET3), false, "different name of field", t)`
115			`badTypeCheck(new(ET4), true, "different type of field", t)`
116			`}`
117
118			`func corruptDataCheck(s string, err error, t *testing.T) {`
119			`b := bytes.NewBufferString(s)`
120			`dec := NewDecoder(b)`
121			`err1 := dec.Decode(new(ET2))`
122			`if err1 != err {`
123			`t.Errorf("from %q expected error %s; got %s", s, err, err1)`
124			`}`
125			`}`
126
127			`// Check that we survive bad data.`
128			`func TestBadData(t *testing.T) {`
129			`corruptDataCheck("", io.EOF, t)`
130			`corruptDataCheck("\x7Fhi", io.ErrUnexpectedEOF, t)`
131			`corruptDataCheck("\x03now is the time for all good men", errBadType, t)`
132			`}`
133
134			`// Types not supported by the Encoder.`
135			`var unsupportedValues = []interface{}{`
136			`make(chan int),`
137			`func(a int) bool { return true },`
138			`}`
139
140			`func TestUnsupported(t *testing.T) {`
141			`var b bytes.Buffer`
142			`enc := NewEncoder(&b)`
143			`for _, v := range unsupportedValues {`
144			`err := enc.Encode(v)`
145			`if err == nil {`
146			`t.Errorf("expected error for %T; got none", v)`
147			`}`
148			`}`
149			`}`
150
151			`func encAndDec(in, out interface{}) error {`
152			`b := new(bytes.Buffer)`
153			`enc := NewEncoder(b)`
154			`err := enc.Encode(in)`
155			`if err != nil {`
156			`return err`
157			`}`
158			`dec := NewDecoder(b)`
159			`err = dec.Decode(out)`
160			`if err != nil {`
161			`return err`
162			`}`
163			`return nil`
164			`}`
165
166			`func TestTypeToPtrType(t *testing.T) {`
167			`// Encode a T, decode a *T`
168			`type Type0 struct {`
169			`A int`
170			`}`
171			`t0 := Type0{7}`
172			`t0p := new(Type0)`
173			`if err := encAndDec(t0, t0p); err != nil {`
174			`t.Error(err)`
175			`}`
176			`}`
177
178			`func TestPtrTypeToType(t *testing.T) {`
179			`// Encode a *T, decode a T`
180			`type Type1 struct {`
181			`A uint`
182			`}`
183			`t1p := &Type1{17}`
184			`var t1 Type1`
185			`if err := encAndDec(t1, t1p); err != nil {`
186			`t.Error(err)`
187			`}`
188			`}`
189
190			`func TestTypeToPtrPtrPtrPtrType(t *testing.T) {`
191			`type Type2 struct {`
192			`A ****float64`
193			`}`
194			`t2 := Type2{}`
195			`t2.A = new(***float64)`
196			`t2.A = new(*float64)`
197			`*t2.A = new(float64)`
198			`***t2.A = new(float64)`
199			`****t2.A = 27.4`
200			`t2pppp := new(***Type2)`
201			`if err := encAndDec(t2, t2pppp); err != nil {`
202			`t.Fatal(err)`
203			`}`
204			`if **(t2pppp).A != **t2.A {`
205			`t.Errorf("wrong value after decode: %g not %g", **(t2pppp).A, **t2.A)`
206			`}`
207			`}`
208
209			`func TestSlice(t *testing.T) {`
210			`type Type3 struct {`
211			`A []string`
212			`}`
213			`t3p := &Type3{[]string{"hello", "world"}}`
214			`var t3 Type3`
215			`if err := encAndDec(t3, t3p); err != nil {`
216			`t.Error(err)`
217			`}`
218			`}`
219
220			`func TestValueError(t *testing.T) {`
221			`// Encode a *T, decode a T`
222			`type Type4 struct {`
223			`A int`
224			`}`
225			`t4p := &Type4{3}`
226			`var t4 Type4 // note: not a pointer.`
227			`if err := encAndDec(t4p, t4); err == nil \|\| strings.Index(err.Error(), "pointer") < 0 {`
228			`t.Error("expected error about pointer; got", err)`
229			`}`
230			`}`
231
232			`func TestArray(t *testing.T) {`
233			`type Type5 struct {`
234			`A [3]string`
235			`B [3]byte`
236			`}`
237			`type Type6 struct {`
238			`A [2]string // can't hold t5.a`
239			`}`
240			`t5 := Type5{[3]string{"hello", ",", "world"}, [3]byte{1, 2, 3}}`
241			`var t5p Type5`
242			`if err := encAndDec(t5, &t5p); err != nil {`
243			`t.Error(err)`
244			`}`
245			`var t6 Type6`
246			`if err := encAndDec(t5, &t6); err == nil {`
247			`t.Error("should fail with mismatched array sizes")`
248			`}`
249			`}`
250
251			`func TestRecursiveMapType(t *testing.T) {`
252			`type recursiveMap map[string]recursiveMap`
253			`r1 := recursiveMap{"A": recursiveMap{"B": nil, "C": nil}, "D": nil}`
254			`r2 := make(recursiveMap)`
255			`if err := encAndDec(r1, &r2); err != nil {`
256			`t.Error(err)`
257			`}`
258			`}`
259
260			`func TestRecursiveSliceType(t *testing.T) {`
261			`type recursiveSlice []recursiveSlice`
262			`r1 := recursiveSlice{0: recursiveSlice{0: nil}, 1: nil}`
263			`r2 := make(recursiveSlice, 0)`
264			`if err := encAndDec(r1, &r2); err != nil {`
265			`t.Error(err)`
266			`}`
267			`}`
268
269			`// Regression test for bug: must send zero values inside arrays`
270			`func TestDefaultsInArray(t *testing.T) {`
271			`type Type7 struct {`
272			`B []bool`
273			`I []int`
274			`S []string`
275			`F []float64`
276			`}`
277			`t7 := Type7{`
278			`[]bool{false, false, true},`
279			`[]int{0, 0, 1},`
280			`[]string{"hi", "", "there"},`
281			`[]float64{0, 0, 1},`
282			`}`
283			`var t7p Type7`
284			`if err := encAndDec(t7, &t7p); err != nil {`
285			`t.Error(err)`
286			`}`
287			`}`
288
289			`var testInt int`
290			`var testFloat32 float32`
291			`var testString string`
292			`var testSlice []string`
293			`var testMap map[string]int`
294			`var testArray [7]int`
295
296			`type SingleTest struct {`
297			`in interface{}`
298			`out interface{}`
299			`err string`
300			`}`
301
302			`var singleTests = []SingleTest{`
303			`{17, &testInt, ""},`
304			`{float32(17.5), &testFloat32, ""},`
305			`{"bike shed", &testString, ""},`
306			`{[]string{"bike", "shed", "paint", "color"}, &testSlice, ""},`
307			`{map[string]int{"seven": 7, "twelve": 12}, &testMap, ""},`
308			`{[7]int{4, 55, 0, 0, 0, 0, 0}, &testArray, ""}, // case that once triggered a bug`
309			`{[7]int{4, 55, 1, 44, 22, 66, 1234}, &testArray, ""},`
310
311			`// Decode errors`
312			`{172, &testFloat32, "type"},`
313			`}`
314
315			`func TestSingletons(t *testing.T) {`
316			`b := new(bytes.Buffer)`
317			`enc := NewEncoder(b)`
318			`dec := NewDecoder(b)`
319			`for _, test := range singleTests {`
320			`b.Reset()`
321			`err := enc.Encode(test.in)`
322			`if err != nil {`
323			`t.Errorf("error encoding %v: %s", test.in, err)`
324			`continue`
325			`}`
326			`err = dec.Decode(test.out)`
327			`switch {`
328			`case err != nil && test.err == "":`
329			`t.Errorf("error decoding %v: %s", test.in, err)`
330			`continue`
331			`case err == nil && test.err != "":`
332			`t.Errorf("expected error decoding %v: %s", test.in, test.err)`
333			`continue`
334			`case err != nil && test.err != "":`
335			`if strings.Index(err.Error(), test.err) < 0 {`
336			`t.Errorf("wrong error decoding %v: wanted %s, got %v", test.in, test.err, err)`
337			`}`
338			`continue`
339			`}`
340			`// Get rid of the pointer in the rhs`
341			`val := reflect.ValueOf(test.out).Elem().Interface()`
342			`if !reflect.DeepEqual(test.in, val) {`
343			`t.Errorf("decoding singleton: expected %v got %v", test.in, val)`
344			`}`
345			`}`
346			`}`
347
348			`func TestStructNonStruct(t *testing.T) {`
349			`type Struct struct {`
350			`A string`
351			`}`
352			`type NonStruct string`
353			`s := Struct{"hello"}`
354			`var sp Struct`
355			`if err := encAndDec(s, &sp); err != nil {`
356			`t.Error(err)`
357			`}`
358			`var ns NonStruct`
359			`if err := encAndDec(s, &ns); err == nil {`
360			`t.Error("should get error for struct/non-struct")`
361			`} else if strings.Index(err.Error(), "type") < 0 {`
362			`t.Error("for struct/non-struct expected type error; got", err)`
363			`}`
364			`// Now try the other way`
365			`var nsp NonStruct`
366			`if err := encAndDec(ns, &nsp); err != nil {`
367			`t.Error(err)`
368			`}`
369			`if err := encAndDec(ns, &s); err == nil {`
370			`t.Error("should get error for non-struct/struct")`
371			`} else if strings.Index(err.Error(), "type") < 0 {`
372			`t.Error("for non-struct/struct expected type error; got", err)`
373			`}`
374			`}`
375
376			`type interfaceIndirectTestI interface {`
377			`F() bool`
378			`}`
379
380			`type interfaceIndirectTestT struct{}`
381
382			`func (this *interfaceIndirectTestT) F() bool {`
383			`return true`
384			`}`
385
386			`// A version of a bug reported on golang-nuts. Also tests top-level`
387			`// slice of interfaces. The issue was registering *T caused T to be`
388			`// stored as the concrete type.`
389			`func TestInterfaceIndirect(t *testing.T) {`
390			`Register(&interfaceIndirectTestT{})`
391			`b := new(bytes.Buffer)`
392			`w := []interfaceIndirectTestI{&interfaceIndirectTestT{}}`
393			`err := NewEncoder(b).Encode(w)`
394			`if err != nil {`
395			`t.Fatal("encode error:", err)`
396			`}`
397
398			`var r []interfaceIndirectTestI`
399			`err = NewDecoder(b).Decode(&r)`
400			`if err != nil {`
401			`t.Fatal("decode error:", err)`
402			`}`
403			`}`
404
405			`// Now follow various tests that decode into things that can't represent the`
406			`// encoded value, all of which should be legal.`
407
408			`// Also, when the ignored object contains an interface value, it may define`
409			`// types. Make sure that skipping the value still defines the types by using`
410			`// the encoder/decoder pair to send a value afterwards. If an interface`
411			`// is sent, its type in the test is always NewType0, so this checks that the`
412			`// encoder and decoder don't skew with respect to type definitions.`
413
414			`type Struct0 struct {`
415			`I interface{}`
416			`}`
417
418			`type NewType0 struct {`
419			`S string`
420			`}`
421
422			`type ignoreTest struct {`
423			`in, out interface{}`
424			`}`
425
426			`var ignoreTests = []ignoreTest{`
427			`// Decode normal struct into an empty struct`
428			`{&struct{ A int }{23}, &struct{}{}},`
429			`// Decode normal struct into a nil.`
430			`{&struct{ A int }{23}, nil},`
431			`// Decode singleton string into a nil.`
432			`{"hello, world", nil},`
433			`// Decode singleton slice into a nil.`
434			`{[]int{1, 2, 3, 4}, nil},`
435			`// Decode struct containing an interface into a nil.`
436			`{&Struct0{&NewType0{"value0"}}, nil},`
437			`// Decode singleton slice of interfaces into a nil.`
438			`{[]interface{}{"hi", &NewType0{"value1"}, 23}, nil},`
439			`}`
440
441			`func TestDecodeIntoNothing(t *testing.T) {`
442			`Register(new(NewType0))`
443			`for i, test := range ignoreTests {`
444			`b := new(bytes.Buffer)`
445			`enc := NewEncoder(b)`
446			`err := enc.Encode(test.in)`
447			`if err != nil {`
448			`t.Errorf("%d: encode error %s:", i, err)`
449			`continue`
450			`}`
451			`dec := NewDecoder(b)`
452			`err = dec.Decode(test.out)`
453			`if err != nil {`
454			`t.Errorf("%d: decode error: %s", i, err)`
455			`continue`
456			`}`
457			`// Now see if the encoder and decoder are in a consistent state.`
458			`str := fmt.Sprintf("Value %d", i)`
459			`err = enc.Encode(&NewType0{str})`
460			`if err != nil {`
461			`t.Fatalf("%d: NewType0 encode error: %s", i, err)`
462			`}`
463			`ns := new(NewType0)`
464			`err = dec.Decode(ns)`
465			`if err != nil {`
466			`t.Fatalf("%d: NewType0 decode error: %s", i, err)`
467			`}`
468			`if ns.S != str {`
469			`t.Fatalf("%d: expected %q got %q", i, str, ns.S)`
470			`}`
471			`}`
472			`}`
473
474			`// Another bug from golang-nuts, involving nested interfaces.`
475			`type Bug0Outer struct {`
476			`Bug0Field interface{}`
477			`}`
478
479			`type Bug0Inner struct {`
480			`A int`
481			`}`
482
483			`func TestNestedInterfaces(t *testing.T) {`
484			`var buf bytes.Buffer`
485			`e := NewEncoder(&buf)`
486			`d := NewDecoder(&buf)`
487			`Register(new(Bug0Outer))`
488			`Register(new(Bug0Inner))`
489			`f := &Bug0Outer{&Bug0Outer{&Bug0Inner{7}}}`
490			`var v interface{} = f`
491			`err := e.Encode(&v)`
492			`if err != nil {`
493			`t.Fatal("Encode:", err)`
494			`}`
495			`err = d.Decode(&v)`
496			`if err != nil {`
497			`t.Fatal("Decode:", err)`
498			`}`
499			`// Make sure it decoded correctly.`
500			`outer1, ok := v.(*Bug0Outer)`
501			`if !ok {`
502			`t.Fatalf("v not Bug0Outer: %T", v)`
503			`}`
504			`outer2, ok := outer1.Bug0Field.(*Bug0Outer)`
505			`if !ok {`
506			`t.Fatalf("v.Bug0Field not Bug0Outer: %T", outer1.Bug0Field)`
507			`}`
508			`inner, ok := outer2.Bug0Field.(*Bug0Inner)`
509			`if !ok {`
510			`t.Fatalf("v.Bug0Field.Bug0Field not Bug0Inner: %T", outer2.Bug0Field)`
511			`}`
512			`if inner.A != 7 {`
513			`t.Fatalf("final value %d; expected %d", inner.A, 7)`
514			`}`
515			`}`
516
517			`// The bugs keep coming. We forgot to send map subtypes before the map.`
518
519			`type Bug1Elem struct {`
520			`Name string`
521			`Id int`
522			`}`
523
524			`type Bug1StructMap map[string]Bug1Elem`
525
526			`func bug1EncDec(in Bug1StructMap, out *Bug1StructMap) error {`
527			`return nil`
528			`}`
529
530			`func TestMapBug1(t *testing.T) {`
531			`in := make(Bug1StructMap)`
532			`in["val1"] = Bug1Elem{"elem1", 1}`
533			`in["val2"] = Bug1Elem{"elem2", 2}`
534
535			`b := new(bytes.Buffer)`
536			`enc := NewEncoder(b)`
537			`err := enc.Encode(in)`
538			`if err != nil {`
539			`t.Fatal("encode:", err)`
540			`}`
541			`dec := NewDecoder(b)`
542			`out := make(Bug1StructMap)`
543			`err = dec.Decode(&out)`
544			`if err != nil {`
545			`t.Fatal("decode:", err)`
546			`}`
547			`if !reflect.DeepEqual(in, out) {`
548			`t.Errorf("mismatch: %v %v", in, out)`
549			`}`
550			`}`
551
552			`func TestGobMapInterfaceEncode(t *testing.T) {`
553			`m := map[string]interface{}{`
554			`"up": uintptr(0),`
555			`"i0": []int{-1},`
556			`"i1": []int8{-1},`
557			`"i2": []int16{-1},`
558			`"i3": []int32{-1},`
559			`"i4": []int64{-1},`
560			`"u0": []uint{1},`
561			`"u1": []uint8{1},`
562			`"u2": []uint16{1},`
563			`"u3": []uint32{1},`
564			`"u4": []uint64{1},`
565			`"f0": []float32{1},`
566			`"f1": []float64{1},`
567			`"c0": []complex64{complex(2, -2)},`
568			`"c1": []complex128{complex(2, float64(-2))},`
569			`"us": []uintptr{0},`
570			`"bo": []bool{false},`
571			`"st": []string{"s"},`
572			`}`
573			`enc := NewEncoder(new(bytes.Buffer))`
574			`err := enc.Encode(m)`
575			`if err != nil {`
576			`t.Errorf("encode map: %s", err)`
577			`}`
578			`}`
579
580			`func TestSliceReusesMemory(t *testing.T) {`
581			`buf := new(bytes.Buffer)`
582			`// Bytes`
583			`{`
584			`x := []byte("abcd")`
585			`enc := NewEncoder(buf)`
586			`err := enc.Encode(x)`
587			`if err != nil {`
588			`t.Errorf("bytes: encode: %s", err)`
589			`}`
590			`// Decode into y, which is big enough.`
591			`y := []byte("ABCDE")`
592			`addr := &y[0]`
593			`dec := NewDecoder(buf)`
594			`err = dec.Decode(&y)`
595			`if err != nil {`
596			`t.Fatal("bytes: decode:", err)`
597			`}`
598			`if !bytes.Equal(x, y) {`
599			`t.Errorf("bytes: expected %q got %q\n", x, y)`
600			`}`
601			`if addr != &y[0] {`
602			`t.Errorf("bytes: unnecessary reallocation")`
603			`}`
604			`}`
605			`// general slice`
606			`{`
607			`x := []rune("abcd")`
608			`enc := NewEncoder(buf)`
609			`err := enc.Encode(x)`
610			`if err != nil {`
611			`t.Errorf("ints: encode: %s", err)`
612			`}`
613			`// Decode into y, which is big enough.`
614			`y := []rune("ABCDE")`
615			`addr := &y[0]`
616			`dec := NewDecoder(buf)`
617			`err = dec.Decode(&y)`
618			`if err != nil {`
619			`t.Fatal("ints: decode:", err)`
620			`}`
621			`if !reflect.DeepEqual(x, y) {`
622			`t.Errorf("ints: expected %q got %q\n", x, y)`
623			`}`
624			`if addr != &y[0] {`
625			`t.Errorf("ints: unnecessary reallocation")`
626			`}`
627			`}`
628			`}`
629
630			`// Used to crash: negative count in recvMessage.`
631			`func TestBadCount(t *testing.T) {`
632			`b := []byte{0xfb, 0xa5, 0x82, 0x2f, 0xca, 0x1}`
633			`if err := NewDecoder(bytes.NewBuffer(b)).Decode(nil); err == nil {`
634			`t.Error("expected error from bad count")`
635			`} else if err.Error() != errBadCount.Error() {`
636			`t.Error("expected bad count error; got", err)`
637			`}`
638			`}`
639
640			`// Verify that sequential Decoders built on a single input will`
641			`// succeed if the input implements ReadByte and there is no`
642			`// type information in the stream.`
643			`func TestSequentialDecoder(t *testing.T) {`
644			`b := new(bytes.Buffer)`
645			`enc := NewEncoder(b)`
646			`const count = 10`
647			`for i := 0; i < count; i++ {`
648			`s := fmt.Sprintf("%d", i)`
649			`if err := enc.Encode(s); err != nil {`
650			`t.Error("encoder fail:", err)`
651			`}`
652			`}`
653			`for i := 0; i < count; i++ {`
654			`dec := NewDecoder(b)`
655			`var s string`
656			`if err := dec.Decode(&s); err != nil {`
657			`t.Fatal("decoder fail:", err)`
658			`}`
659			`if s != fmt.Sprintf("%d", i) {`
660			`t.Fatalf("decode expected %d got %s", i, s)`
661			`}`
662			`}`
663			`}`
664
665			`// Should be able to have unrepresentable fields (chan, func) as long as they`
666			`// are unexported.`
667			`type Bug2 struct {`
668			`A int`
669			`b chan int`
670			`}`
671
672			`func TestUnexportedChan(t *testing.T) {`
673			`b := Bug2{23, make(chan int)}`
674			`var stream bytes.Buffer`
675			`enc := NewEncoder(&stream)`
676			`if err := enc.Encode(b); err != nil {`
677			`t.Fatalf("error encoding unexported channel: %s", err)`
678			`}`
679			`}`
680
681			`func TestSliceIncompatibility(t *testing.T) {`
682			`var in = []byte{1, 2, 3}`
683			`var out []int`
684			`if err := encAndDec(in, &out); err == nil {`
685			`t.Error("expected compatibility error")`
686			`}`
687			`}`