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// 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 asn1

import (
        "bytes"
        "encoding/hex"
        "math/big"
        "testing"
        "time"
)

type intStruct struct {
        A int
}

type twoIntStruct struct {
        A int
        B int
}

type bigIntStruct struct {
        A *big.Int
}

type nestedStruct struct {
        A intStruct
}

type rawContentsStruct struct {
        Raw RawContent
        A   int
}

type implicitTagTest struct {
        A int `asn1:"implicit,tag:5"`
}

type explicitTagTest struct {
        A int `asn1:"explicit,tag:5"`
}

type ia5StringTest struct {
        A string `asn1:"ia5"`
}

type printableStringTest struct {
        A string `asn1:"printable"`
}

type optionalRawValueTest struct {
        A RawValue `asn1:"optional"`
}

type testSET []int

var PST = time.FixedZone("PST", -8*60*60)

type marshalTest struct {
        in  interface{}
        out string // hex encoded
}

var marshalTests = []marshalTest{
        {10, "02010a"},
        {127, "02017f"},
        {128, "02020080"},
        {-128, "020180"},
        {-129, "0202ff7f"},
        {intStruct{64}, "3003020140"},
        {bigIntStruct{big.NewInt(0x123456)}, "30050203123456"},
        {twoIntStruct{64, 65}, "3006020140020141"},
        {nestedStruct{intStruct{127}}, "3005300302017f"},
        {[]byte{1, 2, 3}, "0403010203"},
        {implicitTagTest{64}, "3003850140"},
        {explicitTagTest{64}, "3005a503020140"},
        {time.Unix(0, 0).UTC(), "170d3730303130313030303030305a"},
        {time.Unix(1258325776, 0).UTC(), "170d3039313131353232353631365a"},
        {time.Unix(1258325776, 0).In(PST), "17113039313131353232353631362d30383030"},
        {BitString{[]byte{0x80}, 1}, "03020780"},
        {BitString{[]byte{0x81, 0xf0}, 12}, "03030481f0"},
        {ObjectIdentifier([]int{1, 2, 3, 4}), "06032a0304"},
        {ObjectIdentifier([]int{1, 2, 840, 133549, 1, 1, 5}), "06092a864888932d010105"},
        {"test", "130474657374"},
        {
                "" +
                        "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" +
                        "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" +
                        "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" +
                        "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", // This is 127 times 'x'
                "137f" +
                        "7878787878787878787878787878787878787878787878787878787878787878" +
                        "7878787878787878787878787878787878787878787878787878787878787878" +
                        "7878787878787878787878787878787878787878787878787878787878787878" +
                        "78787878787878787878787878787878787878787878787878787878787878",
        },
        {
                "" +
                        "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" +
                        "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" +
                        "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" +
                        "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", // This is 128 times 'x'
                "138180" +
                        "7878787878787878787878787878787878787878787878787878787878787878" +
                        "7878787878787878787878787878787878787878787878787878787878787878" +
                        "7878787878787878787878787878787878787878787878787878787878787878" +
                        "7878787878787878787878787878787878787878787878787878787878787878",
        },
        {ia5StringTest{"test"}, "3006160474657374"},
        {optionalRawValueTest{}, "3000"},
        {printableStringTest{"test"}, "3006130474657374"},
        {printableStringTest{"test*"}, "30071305746573742a"},
        {rawContentsStruct{nil, 64}, "3003020140"},
        {rawContentsStruct{[]byte{0x30, 3, 1, 2, 3}, 64}, "3003010203"},
        {RawValue{Tag: 1, Class: 2, IsCompound: false, Bytes: []byte{1, 2, 3}}, "8103010203"},
        {testSET([]int{10}), "310302010a"},
}

func TestMarshal(t *testing.T) {
        for i, test := range marshalTests {
                data, err := Marshal(test.in)
                if err != nil {
                        t.Errorf("#%d failed: %s", i, err)
                }
                out, _ := hex.DecodeString(test.out)
                if bytes.Compare(out, data) != 0 {
                        t.Errorf("#%d got: %x want %x\n\t%q\n\t%q", i, data, out, data, out)

                }
        }
}