diff options
Diffstat (limited to 'src/pkg/gob/encoder_test.go')
-rw-r--r-- | src/pkg/gob/encoder_test.go | 551 |
1 files changed, 0 insertions, 551 deletions
diff --git a/src/pkg/gob/encoder_test.go b/src/pkg/gob/encoder_test.go deleted file mode 100644 index 792afbd77..000000000 --- a/src/pkg/gob/encoder_test.go +++ /dev/null @@ -1,551 +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 gob - -import ( - "bytes" - "fmt" - "io" - "os" - "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 os.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("", os.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{}) os.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.String(), "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, "wrong 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.String(), 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.String(), "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.String(), "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) os.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) - } -} |