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path: root/compression/rle/read_write_test.go
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package rle

import (
    "bytes"
    "testing"

    "github.com/ethereum/go-ethereum/crypto"
)

func TestDecompressSimple(t *testing.T) {
    res, err := Decompress([]byte{token, 0xfd})
    if err != nil {
        t.Error(err)
    }
    if bytes.Compare(res, crypto.Sha3([]byte(""))) != 0 {
        t.Error("empty sha3", res)
    }

    res, err = Decompress([]byte{token, 0xfe})
    if err != nil {
        t.Error(err)
    }
    if bytes.Compare(res, crypto.Sha3([]byte{0x80})) != 0 {
        t.Error("0x80 sha3", res)
    }

    res, err = Decompress([]byte{token, 0xff})
    if err != nil {
        t.Error(err)
    }
    if bytes.Compare(res, []byte{token}) != 0 {
        t.Error("token", res)
    }

    res, err = Decompress([]byte{token, 12})
    if err != nil {
        t.Error(err)
    }
    if bytes.Compare(res, make([]byte, 10)) != 0 {
        t.Error("10 * zero", res)
    }
}

func TestDecompressMulti(t *testing.T) {
    res, err := Decompress([]byte{token, 0xfd, token, 0xfe, token, 12})
    if err != nil {
        t.Error(err)
    }

    var exp []byte
    exp = append(exp, crypto.Sha3([]byte(""))...)
    exp = append(exp, crypto.Sha3([]byte{0x80})...)
    exp = append(exp, make([]byte, 10)...)

    if bytes.Compare(res, res) != 0 {
        t.Error("Expected", exp, "result", res)
    }
}

func TestCompressSimple(t *testing.T) {
    res := Compress([]byte{0, 0, 0, 0, 0})
    if bytes.Compare(res, []byte{token, 7}) != 0 {
        t.Error("5 * zero", res)
    }

    res = Compress(crypto.Sha3([]byte("")))
    if bytes.Compare(res, []byte{token, emptyShaToken}) != 0 {
        t.Error("empty sha", res)
    }

    res = Compress(crypto.Sha3([]byte{0x80}))
    if bytes.Compare(res, []byte{token, emptyListShaToken}) != 0 {
        t.Error("empty list sha", res)
    }

    res = Compress([]byte{token})
    if bytes.Compare(res, []byte{token, tokenToken}) != 0 {
        t.Error("token", res)
    }
}

func TestCompressMulti(t *testing.T) {
    in := []byte{0, 0, 0, 0, 0}
    in = append(in, crypto.Sha3([]byte(""))...)
    in = append(in, crypto.Sha3([]byte{0x80})...)
    in = append(in, token)
    res := Compress(in)

    exp := []byte{token, 7, token, emptyShaToken, token, emptyListShaToken, token, tokenToken}
    if bytes.Compare(res, exp) != 0 {
        t.Error("expected", exp, "got", res)
    }
}