diff options
Diffstat (limited to 'src/pkg/encoding/binary/binary_test.go')
-rw-r--r-- | src/pkg/encoding/binary/binary_test.go | 397 |
1 files changed, 0 insertions, 397 deletions
diff --git a/src/pkg/encoding/binary/binary_test.go b/src/pkg/encoding/binary/binary_test.go deleted file mode 100644 index c80c90383..000000000 --- a/src/pkg/encoding/binary/binary_test.go +++ /dev/null @@ -1,397 +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 binary - -import ( - "bytes" - "io" - "math" - "reflect" - "strings" - "testing" -) - -type Struct struct { - Int8 int8 - Int16 int16 - Int32 int32 - Int64 int64 - Uint8 uint8 - Uint16 uint16 - Uint32 uint32 - Uint64 uint64 - Float32 float32 - Float64 float64 - Complex64 complex64 - Complex128 complex128 - Array [4]uint8 -} - -type T struct { - Int int - Uint uint - Uintptr uintptr - Array [4]int -} - -var s = Struct{ - 0x01, - 0x0203, - 0x04050607, - 0x08090a0b0c0d0e0f, - 0x10, - 0x1112, - 0x13141516, - 0x1718191a1b1c1d1e, - - math.Float32frombits(0x1f202122), - math.Float64frombits(0x232425262728292a), - complex( - math.Float32frombits(0x2b2c2d2e), - math.Float32frombits(0x2f303132), - ), - complex( - math.Float64frombits(0x333435363738393a), - math.Float64frombits(0x3b3c3d3e3f404142), - ), - - [4]uint8{0x43, 0x44, 0x45, 0x46}, -} - -var big = []byte{ - 1, - 2, 3, - 4, 5, 6, 7, - 8, 9, 10, 11, 12, 13, 14, 15, - 16, - 17, 18, - 19, 20, 21, 22, - 23, 24, 25, 26, 27, 28, 29, 30, - - 31, 32, 33, 34, - 35, 36, 37, 38, 39, 40, 41, 42, - 43, 44, 45, 46, 47, 48, 49, 50, - 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, - - 67, 68, 69, 70, -} - -var little = []byte{ - 1, - 3, 2, - 7, 6, 5, 4, - 15, 14, 13, 12, 11, 10, 9, 8, - 16, - 18, 17, - 22, 21, 20, 19, - 30, 29, 28, 27, 26, 25, 24, 23, - - 34, 33, 32, 31, - 42, 41, 40, 39, 38, 37, 36, 35, - 46, 45, 44, 43, 50, 49, 48, 47, - 58, 57, 56, 55, 54, 53, 52, 51, 66, 65, 64, 63, 62, 61, 60, 59, - - 67, 68, 69, 70, -} - -var src = []byte{1, 2, 3, 4, 5, 6, 7, 8} -var res = []int32{0x01020304, 0x05060708} - -func checkResult(t *testing.T, dir string, order ByteOrder, err error, have, want interface{}) { - if err != nil { - t.Errorf("%v %v: %v", dir, order, err) - return - } - if !reflect.DeepEqual(have, want) { - t.Errorf("%v %v:\n\thave %+v\n\twant %+v", dir, order, have, want) - } -} - -func testRead(t *testing.T, order ByteOrder, b []byte, s1 interface{}) { - var s2 Struct - err := Read(bytes.NewReader(b), order, &s2) - checkResult(t, "Read", order, err, s2, s1) -} - -func testWrite(t *testing.T, order ByteOrder, b []byte, s1 interface{}) { - buf := new(bytes.Buffer) - err := Write(buf, order, s1) - checkResult(t, "Write", order, err, buf.Bytes(), b) -} - -func TestLittleEndianRead(t *testing.T) { testRead(t, LittleEndian, little, s) } -func TestLittleEndianWrite(t *testing.T) { testWrite(t, LittleEndian, little, s) } -func TestLittleEndianPtrWrite(t *testing.T) { testWrite(t, LittleEndian, little, &s) } - -func TestBigEndianRead(t *testing.T) { testRead(t, BigEndian, big, s) } -func TestBigEndianWrite(t *testing.T) { testWrite(t, BigEndian, big, s) } -func TestBigEndianPtrWrite(t *testing.T) { testWrite(t, BigEndian, big, &s) } - -func TestReadSlice(t *testing.T) { - slice := make([]int32, 2) - err := Read(bytes.NewReader(src), BigEndian, slice) - checkResult(t, "ReadSlice", BigEndian, err, slice, res) -} - -func TestWriteSlice(t *testing.T) { - buf := new(bytes.Buffer) - err := Write(buf, BigEndian, res) - checkResult(t, "WriteSlice", BigEndian, err, buf.Bytes(), src) -} - -// Addresses of arrays are easier to manipulate with reflection than are slices. -var intArrays = []interface{}{ - &[100]int8{}, - &[100]int16{}, - &[100]int32{}, - &[100]int64{}, - &[100]uint8{}, - &[100]uint16{}, - &[100]uint32{}, - &[100]uint64{}, -} - -func TestSliceRoundTrip(t *testing.T) { - buf := new(bytes.Buffer) - for _, array := range intArrays { - src := reflect.ValueOf(array).Elem() - unsigned := false - switch src.Index(0).Kind() { - case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64: - unsigned = true - } - for i := 0; i < src.Len(); i++ { - if unsigned { - src.Index(i).SetUint(uint64(i * 0x07654321)) - } else { - src.Index(i).SetInt(int64(i * 0x07654321)) - } - } - buf.Reset() - srcSlice := src.Slice(0, src.Len()) - err := Write(buf, BigEndian, srcSlice.Interface()) - if err != nil { - t.Fatal(err) - } - dst := reflect.New(src.Type()).Elem() - dstSlice := dst.Slice(0, dst.Len()) - err = Read(buf, BigEndian, dstSlice.Interface()) - if err != nil { - t.Fatal(err) - } - if !reflect.DeepEqual(src.Interface(), dst.Interface()) { - t.Fatal(src) - } - } -} - -func TestWriteT(t *testing.T) { - buf := new(bytes.Buffer) - ts := T{} - if err := Write(buf, BigEndian, ts); err == nil { - t.Errorf("WriteT: have err == nil, want non-nil") - } - - tv := reflect.Indirect(reflect.ValueOf(ts)) - for i, n := 0, tv.NumField(); i < n; i++ { - typ := tv.Field(i).Type().String() - if typ == "[4]int" { - typ = "int" // the problem is int, not the [4] - } - if err := Write(buf, BigEndian, tv.Field(i).Interface()); err == nil { - t.Errorf("WriteT.%v: have err == nil, want non-nil", tv.Field(i).Type()) - } else if !strings.Contains(err.Error(), typ) { - t.Errorf("WriteT: have err == %q, want it to mention %s", err, typ) - } - } -} - -type BlankFields struct { - A uint32 - _ int32 - B float64 - _ [4]int16 - C byte - _ [7]byte - _ struct { - f [8]float32 - } -} - -type BlankFieldsProbe struct { - A uint32 - P0 int32 - B float64 - P1 [4]int16 - C byte - P2 [7]byte - P3 struct { - F [8]float32 - } -} - -func TestBlankFields(t *testing.T) { - buf := new(bytes.Buffer) - b1 := BlankFields{A: 1234567890, B: 2.718281828, C: 42} - if err := Write(buf, LittleEndian, &b1); err != nil { - t.Error(err) - } - - // zero values must have been written for blank fields - var p BlankFieldsProbe - if err := Read(buf, LittleEndian, &p); err != nil { - t.Error(err) - } - - // quick test: only check first value of slices - if p.P0 != 0 || p.P1[0] != 0 || p.P2[0] != 0 || p.P3.F[0] != 0 { - t.Errorf("non-zero values for originally blank fields: %#v", p) - } - - // write p and see if we can probe only some fields - if err := Write(buf, LittleEndian, &p); err != nil { - t.Error(err) - } - - // read should ignore blank fields in b2 - var b2 BlankFields - if err := Read(buf, LittleEndian, &b2); err != nil { - t.Error(err) - } - if b1.A != b2.A || b1.B != b2.B || b1.C != b2.C { - t.Errorf("%#v != %#v", b1, b2) - } -} - -// An attempt to read into a struct with an unexported field will -// panic. This is probably not the best choice, but at this point -// anything else would be an API change. - -type Unexported struct { - a int32 -} - -func TestUnexportedRead(t *testing.T) { - var buf bytes.Buffer - u1 := Unexported{a: 1} - if err := Write(&buf, LittleEndian, &u1); err != nil { - t.Fatal(err) - } - - defer func() { - if recover() == nil { - t.Fatal("did not panic") - } - }() - var u2 Unexported - Read(&buf, LittleEndian, &u2) -} - -type byteSliceReader struct { - remain []byte -} - -func (br *byteSliceReader) Read(p []byte) (int, error) { - n := copy(p, br.remain) - br.remain = br.remain[n:] - return n, nil -} - -func BenchmarkReadSlice1000Int32s(b *testing.B) { - bsr := &byteSliceReader{} - slice := make([]int32, 1000) - buf := make([]byte, len(slice)*4) - b.SetBytes(int64(len(buf))) - b.ResetTimer() - for i := 0; i < b.N; i++ { - bsr.remain = buf - Read(bsr, BigEndian, slice) - } -} - -func BenchmarkReadStruct(b *testing.B) { - bsr := &byteSliceReader{} - var buf bytes.Buffer - Write(&buf, BigEndian, &s) - n, _ := dataSize(reflect.ValueOf(s)) - b.SetBytes(int64(n)) - t := s - b.ResetTimer() - for i := 0; i < b.N; i++ { - bsr.remain = buf.Bytes() - Read(bsr, BigEndian, &t) - } - b.StopTimer() - if !reflect.DeepEqual(s, t) { - b.Fatal("no match") - } -} - -func BenchmarkReadInts(b *testing.B) { - var ls Struct - bsr := &byteSliceReader{} - var r io.Reader = bsr - b.SetBytes(2 * (1 + 2 + 4 + 8)) - b.ResetTimer() - for i := 0; i < b.N; i++ { - bsr.remain = big - Read(r, BigEndian, &ls.Int8) - Read(r, BigEndian, &ls.Int16) - Read(r, BigEndian, &ls.Int32) - Read(r, BigEndian, &ls.Int64) - Read(r, BigEndian, &ls.Uint8) - Read(r, BigEndian, &ls.Uint16) - Read(r, BigEndian, &ls.Uint32) - Read(r, BigEndian, &ls.Uint64) - } - - want := s - want.Float32 = 0 - want.Float64 = 0 - want.Complex64 = 0 - want.Complex128 = 0 - for i := range want.Array { - want.Array[i] = 0 - } - b.StopTimer() - if !reflect.DeepEqual(ls, want) { - panic("no match") - } -} - -func BenchmarkWriteInts(b *testing.B) { - buf := new(bytes.Buffer) - var w io.Writer = buf - b.SetBytes(2 * (1 + 2 + 4 + 8)) - b.ResetTimer() - for i := 0; i < b.N; i++ { - buf.Reset() - Write(w, BigEndian, s.Int8) - Write(w, BigEndian, s.Int16) - Write(w, BigEndian, s.Int32) - Write(w, BigEndian, s.Int64) - Write(w, BigEndian, s.Uint8) - Write(w, BigEndian, s.Uint16) - Write(w, BigEndian, s.Uint32) - Write(w, BigEndian, s.Uint64) - } - b.StopTimer() - if !bytes.Equal(buf.Bytes(), big[:30]) { - b.Fatalf("first half doesn't match: %x %x", buf.Bytes(), big[:30]) - } -} - -func BenchmarkWriteSlice1000Int32s(b *testing.B) { - slice := make([]int32, 1000) - buf := new(bytes.Buffer) - var w io.Writer = buf - b.SetBytes(4 * 1000) - b.ResetTimer() - for i := 0; i < b.N; i++ { - buf.Reset() - Write(w, BigEndian, slice) - } - b.StopTimer() -} |