codekingpro/portable-devtools

1// Copyright 2009 The Go Authors. All rights reserved.2// Use of this source code is governed by a BSD-style3// license that can be found in the LICENSE file.4 5package hex6 7import (8	"bytes"9	"fmt"10	"io"11	"strings"12	"testing"13)14 15type encDecTest struct {16	enc string17	dec []byte18}19 20var encDecTests = []encDecTest{21	{"", []byte{}},22	{"0001020304050607", []byte{0, 1, 2, 3, 4, 5, 6, 7}},23	{"08090a0b0c0d0e0f", []byte{8, 9, 10, 11, 12, 13, 14, 15}},24	{"f0f1f2f3f4f5f6f7", []byte{0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7}},25	{"f8f9fafbfcfdfeff", []byte{0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff}},26	{"67", []byte{'g'}},27	{"e3a1", []byte{0xe3, 0xa1}},28}29 30func TestEncode(t *testing.T) {31	for i, test := range encDecTests {32		dst := make([]byte, EncodedLen(len(test.dec)))33		n := Encode(dst, test.dec)34		if n != len(dst) {35			t.Errorf("#%d: bad return value: got: %d want: %d", i, n, len(dst))36		}37		if string(dst) != test.enc {38			t.Errorf("#%d: got: %#v want: %#v", i, dst, test.enc)39		}40		dst = []byte("lead")41		dst = AppendEncode(dst, test.dec)42		if string(dst) != "lead"+test.enc {43			t.Errorf("#%d: got: %#v want: %#v", i, dst, "lead"+test.enc)44		}45	}46}47 48func TestDecode(t *testing.T) {49	// Case for decoding uppercase hex characters, since50	// Encode always uses lowercase.51	decTests := append(encDecTests, encDecTest{"F8F9FAFBFCFDFEFF", []byte{0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff}})52	for i, test := range decTests {53		dst := make([]byte, DecodedLen(len(test.enc)))54		n, err := Decode(dst, []byte(test.enc))55		if err != nil {56			t.Errorf("#%d: bad return value: got:%d want:%d", i, n, len(dst))57		} else if !bytes.Equal(dst, test.dec) {58			t.Errorf("#%d: got: %#v want: %#v", i, dst, test.dec)59		}60		dst = []byte("lead")61		dst, err = AppendDecode(dst, []byte(test.enc))62		if err != nil {63			t.Errorf("#%d: AppendDecode error: %v", i, err)64		} else if string(dst) != "lead"+string(test.dec) {65			t.Errorf("#%d: got: %#v want: %#v", i, dst, "lead"+string(test.dec))66		}67	}68}69 70func TestEncodeToString(t *testing.T) {71	for i, test := range encDecTests {72		s := EncodeToString(test.dec)73		if s != test.enc {74			t.Errorf("#%d got:%s want:%s", i, s, test.enc)75		}76	}77}78 79func TestDecodeString(t *testing.T) {80	for i, test := range encDecTests {81		dst, err := DecodeString(test.enc)82		if err != nil {83			t.Errorf("#%d: unexpected err value: %s", i, err)84			continue85		}86		if !bytes.Equal(dst, test.dec) {87			t.Errorf("#%d: got: %#v want: #%v", i, dst, test.dec)88		}89	}90}91 92var errTests = []struct {93	in  string94	out string95	err error96}{97	{"", "", nil},98	{"0", "", ErrLength},99	{"zd4aa", "", InvalidByteError('z')},100	{"d4aaz", "\xd4\xaa", InvalidByteError('z')},101	{"30313", "01", ErrLength},102	{"0g", "", InvalidByteError('g')},103	{"00gg", "\x00", InvalidByteError('g')},104	{"0\x01", "", InvalidByteError('\x01')},105	{"ffeed", "\xff\xee", ErrLength},106}107 108func TestDecodeErr(t *testing.T) {109	for _, tt := range errTests {110		out := make([]byte, len(tt.in)+10)111		n, err := Decode(out, []byte(tt.in))112		if string(out[:n]) != tt.out || err != tt.err {113			t.Errorf("Decode(%q) = %q, %v, want %q, %v", tt.in, string(out[:n]), err, tt.out, tt.err)114		}115	}116}117 118func TestDecodeStringErr(t *testing.T) {119	for _, tt := range errTests {120		out, err := DecodeString(tt.in)121		if string(out) != tt.out || err != tt.err {122			t.Errorf("DecodeString(%q) = %q, %v, want %q, %v", tt.in, out, err, tt.out, tt.err)123		}124	}125}126 127func TestEncoderDecoder(t *testing.T) {128	for _, multiplier := range []int{1, 128, 192} {129		for _, test := range encDecTests {130			input := bytes.Repeat(test.dec, multiplier)131			output := strings.Repeat(test.enc, multiplier)132 133			var buf bytes.Buffer134			enc := NewEncoder(&buf)135			r := struct{ io.Reader }{bytes.NewReader(input)} // io.Reader only; not io.WriterTo136			if n, err := io.CopyBuffer(enc, r, make([]byte, 7)); n != int64(len(input)) || err != nil {137				t.Errorf("encoder.Write(%q*%d) = (%d, %v), want (%d, nil)", test.dec, multiplier, n, err, len(input))138				continue139			}140 141			if encDst := buf.String(); encDst != output {142				t.Errorf("buf(%q*%d) = %v, want %v", test.dec, multiplier, encDst, output)143				continue144			}145 146			dec := NewDecoder(&buf)147			var decBuf bytes.Buffer148			w := struct{ io.Writer }{&decBuf} // io.Writer only; not io.ReaderFrom149			if _, err := io.CopyBuffer(w, dec, make([]byte, 7)); err != nil || decBuf.Len() != len(input) {150				t.Errorf("decoder.Read(%q*%d) = (%d, %v), want (%d, nil)", test.enc, multiplier, decBuf.Len(), err, len(input))151			}152 153			if !bytes.Equal(decBuf.Bytes(), input) {154				t.Errorf("decBuf(%q*%d) = %v, want %v", test.dec, multiplier, decBuf.Bytes(), input)155				continue156			}157		}158	}159}160 161func TestDecoderErr(t *testing.T) {162	for _, tt := range errTests {163		dec := NewDecoder(strings.NewReader(tt.in))164		out, err := io.ReadAll(dec)165		wantErr := tt.err166		// Decoder is reading from stream, so it reports io.ErrUnexpectedEOF instead of ErrLength.167		if wantErr == ErrLength {168			wantErr = io.ErrUnexpectedEOF169		}170		if string(out) != tt.out || err != wantErr {171			t.Errorf("NewDecoder(%q) = %q, %v, want %q, %v", tt.in, out, err, tt.out, wantErr)172		}173	}174}175 176func TestDumper(t *testing.T) {177	var in [40]byte178	for i := range in {179		in[i] = byte(i + 30)180	}181 182	for stride := 1; stride < len(in); stride++ {183		var out bytes.Buffer184		dumper := Dumper(&out)185		done := 0186		for done < len(in) {187			todo := done + stride188			if todo > len(in) {189				todo = len(in)190			}191			dumper.Write(in[done:todo])192			done = todo193		}194 195		dumper.Close()196		if !bytes.Equal(out.Bytes(), expectedHexDump) {197			t.Errorf("stride: %d failed. got:\n%s\nwant:\n%s", stride, out.Bytes(), expectedHexDump)198		}199	}200}201 202func TestDumper_doubleclose(t *testing.T) {203	var out strings.Builder204	dumper := Dumper(&out)205 206	dumper.Write([]byte(`gopher`))207	dumper.Close()208	dumper.Close()209	dumper.Write([]byte(`gopher`))210	dumper.Close()211 212	expected := "00000000  67 6f 70 68 65 72                                 |gopher|\n"213	if out.String() != expected {214		t.Fatalf("got:\n%#v\nwant:\n%#v", out.String(), expected)215	}216}217 218func TestDumper_earlyclose(t *testing.T) {219	var out strings.Builder220	dumper := Dumper(&out)221 222	dumper.Close()223	dumper.Write([]byte(`gopher`))224 225	expected := ""226	if out.String() != expected {227		t.Fatalf("got:\n%#v\nwant:\n%#v", out.String(), expected)228	}229}230 231func TestDump(t *testing.T) {232	var in [40]byte233	for i := range in {234		in[i] = byte(i + 30)235	}236 237	out := []byte(Dump(in[:]))238	if !bytes.Equal(out, expectedHexDump) {239		t.Errorf("got:\n%s\nwant:\n%s", out, expectedHexDump)240	}241}242 243var expectedHexDump = []byte(`00000000  1e 1f 20 21 22 23 24 25  26 27 28 29 2a 2b 2c 2d  |.. !"#$%&'()*+,-|24400000010  2e 2f 30 31 32 33 34 35  36 37 38 39 3a 3b 3c 3d  |./0123456789:;<=|24500000020  3e 3f 40 41 42 43 44 45                           |>?@ABCDE|246`)247 248var sink []byte249 250func BenchmarkEncode(b *testing.B) {251	for _, size := range []int{256, 1024, 4096, 16384} {252		src := bytes.Repeat([]byte{2, 3, 5, 7, 9, 11, 13, 17}, size/8)253		sink = make([]byte, 2*size)254 255		b.Run(fmt.Sprintf("%v", size), func(b *testing.B) {256			b.SetBytes(int64(size))257			for i := 0; i < b.N; i++ {258				Encode(sink, src)259			}260		})261	}262}263 264func BenchmarkDecode(b *testing.B) {265	for _, size := range []int{256, 1024, 4096, 16384} {266		src := bytes.Repeat([]byte{'2', 'b', '7', '4', '4', 'f', 'a', 'a'}, size/8)267		sink = make([]byte, size/2)268 269		b.Run(fmt.Sprintf("%v", size), func(b *testing.B) {270			b.SetBytes(int64(size))271			for i := 0; i < b.N; i++ {272				Decode(sink, src)273			}274		})275	}276}277 278func BenchmarkDecodeString(b *testing.B) {279	for _, size := range []int{256, 1024, 4096, 16384} {280		src := strings.Repeat("2b744faa", size/8)281		b.Run(fmt.Sprintf("%v", size), func(b *testing.B) {282			b.SetBytes(int64(size))283			for i := 0; i < b.N; i++ {284				sink, _ = DecodeString(src)285			}286		})287	}288}289 290func BenchmarkDump(b *testing.B) {291	for _, size := range []int{256, 1024, 4096, 16384} {292		src := bytes.Repeat([]byte{2, 3, 5, 7, 9, 11, 13, 17}, size/8)293 294		b.Run(fmt.Sprintf("%v", size), func(b *testing.B) {295			b.SetBytes(int64(size))296			for i := 0; i < b.N; i++ {297				Dump(src)298			}299		})300	}301}302