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decoder_test.go
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package marc
import (
"bufio"
"bytes"
"fmt"
"testing"
)
var sampleMARC = `01142cam 2200301 a 4500001001300000003000400013005001700017008004100034010001700075020002500092040001800117042000900135050002600144082001600170100003200186245008600218250001200304260005200316300004900368500004000417520022800457650003300685650003300718650002400751650002100775650002300796700002100819 92005291 DLC 19930521155141.9 920219s1993 caua j 000 0 eng a 92005291 a0152038655 : c$15.95 aDLC cDLC dDLC alcac 00 aPS3537.A618 bA88 1993 00 a811/.52 220 1 aSandburg, Carl, d1878-1967. 10 aArithmetic / cCarl Sandburg ; illustrated as an anamorphic adventure by Ted Rand. a1st ed. aSan Diego : bHarcourt Brace Jovanovich, cc1993. a1 v. (unpaged) : bill. (some col.) ; c26 cm. aOne Mylar sheet included in pocket. aA poem about numbers and their characteristics. Features anamorphic, or distorted, drawings which can be restored to normal by viewing from a particular angle or by viewing the image's reflection in the provided Mylar cone. 0 aArithmetic xJuvenile poetry. 0 aChildren's poetry, American. 1 aArithmetic xPoetry. 1 aAmerican poetry. 1 aVisual perception. 1 aRand, Ted, eill. `
var sampleLineMARC = `*000 c
*0010010463
*008871001 a 0 nob r
*015 $a29$bBibliofilID
*019 $bl
*0823 $a242
*090 $c242$dKar
*100 0$aKarlén, Barbro$d1954-$jsv.$310008600
*24010$aI begynnelsen skapade Gud
*24510$aI begynnelsen skapte Gud$bdikt og salmer i norsk gjendiktning ved Inger Hagerup ; prosaen overs. av Gunnel Malmström ; illus. av Vanja Hübinette-Simonson
*260 $aOslo$bAschehoug$c1968
*300 $a97 s.$bill.
*574 $aOriginaltittel: I begynnelsen skapade Gud
*655 $aAndaktsbøker$310008700
*70010$aHagerup, Inger$d1905-1985$jn.$310008800
*850 $aDEICHM$sn
^`
var sampleMARCXML = `
<?xml version="1.0" encoding="UTF-8"?>
<collection xmlns="http://www.loc.gov/MARC21/slim">
<record>
<leader>01142cam 2200301 a 4500</leader>
<controlfield tag="001"> 92005291 </controlfield>
<controlfield tag="003">DLC</controlfield>
<controlfield tag="005">19930521155141.9</controlfield>
<controlfield tag="008">920219s1993 caua j 000 0 eng </controlfield>
<datafield tag="010" ind1=" " ind2=" ">
<subfield code="a"> 92005291 </subfield>
</datafield>
<datafield tag="020" ind1=" " ind2=" ">
<subfield code="a">0152038655 :</subfield>
<subfield code="c">$15.95</subfield>
</datafield>
<datafield tag="040" ind1=" " ind2=" ">
<subfield code="a">DLC</subfield>
<subfield code="c">DLC</subfield>
<subfield code="d">DLC</subfield>
</datafield>
<datafield tag="042" ind1=" " ind2=" ">
<subfield code="a">lcac</subfield>
</datafield>
<datafield tag="050" ind1="0" ind2="0">
<subfield code="a">PS3537.A618</subfield>
<subfield code="b">A88 1993</subfield>
</datafield>
<datafield tag="082" ind1="0" ind2="0">
<subfield code="a">811/.52</subfield>
<subfield code="2">20</subfield>
</datafield>
<datafield tag="100" ind1="1" ind2=" ">
<subfield code="a">Sandburg, Carl,</subfield>
<subfield code="d">1878-1967.</subfield>
</datafield>
<datafield tag="245" ind1="1" ind2="0">
<subfield code="a">Arithmetic /</subfield>
<subfield code="c">Carl Sandburg ; illustrated as an anamorphic adventure by Ted Rand.</subfield>
</datafield>
<datafield tag="250" ind1=" " ind2=" ">
<subfield code="a">1st ed.</subfield>
</datafield>
<datafield tag="260" ind1=" " ind2=" ">
<subfield code="a">San Diego :</subfield>
<subfield code="b">Harcourt Brace Jovanovich,</subfield>
<subfield code="c">c1993.</subfield>
</datafield>
<datafield tag="300" ind1=" " ind2=" ">
<subfield code="a">1 v. (unpaged) :</subfield>
<subfield code="b">ill. (some col.) ;</subfield>
<subfield code="c">26 cm.</subfield>
</datafield>
<datafield tag="500" ind1=" " ind2=" ">
<subfield code="a">One Mylar sheet included in pocket.</subfield>
</datafield>
<datafield tag="520" ind1=" " ind2=" ">
<subfield code="a">A poem about numbers and their characteristics. Features anamorphic, or distorted, drawings which can be restored to normal by viewing from a particular angle or by viewing the image's reflection in the provided Mylar cone.</subfield>
</datafield>
<datafield tag="650" ind1=" " ind2="0">
<subfield code="a">Arithmetic</subfield>
<subfield code="x">Juvenile poetry.</subfield>
</datafield>
<datafield tag="650" ind1=" " ind2="0">
<subfield code="a">Children's poetry, American.</subfield>
</datafield>
<datafield tag="650" ind1=" " ind2="1">
<subfield code="a">Arithmetic</subfield>
<subfield code="x">Poetry.</subfield>
</datafield>
<datafield tag="650" ind1=" " ind2="1">
<subfield code="a">American poetry.</subfield>
</datafield>
<datafield tag="650" ind1=" " ind2="1">
<subfield code="a">Visual perception.</subfield>
</datafield>
<datafield tag="700" ind1="1" ind2=" ">
<subfield code="a">Rand, Ted,</subfield>
<subfield code="e">ill.</subfield>
</datafield>
</record>
</collection>`
func TestDetectFormat(t *testing.T) {
tests := []struct {
input string
want Format
}{
{sampleMARC, MARC},
{sampleMARCXML, MARCXML},
{sampleLineMARC, LineMARC},
{"abc", unknown},
}
for _, test := range tests {
if f := DetectFormat([]byte(test.input)); f != test.want {
t.Errorf("DetectFormat => %v; want %v", f, test.want)
}
}
}
func TestDecodeMARC(t *testing.T) { testDecodeRecord(t, sampleMARC, MARC) }
func TestDecodeLineMARC(t *testing.T) { testDecodeRecord(t, sampleLineMARC, LineMARC) }
func TestDecodeMARCXML(t *testing.T) { testDecodeRecord(t, sampleMARCXML, MARCXML) }
func testDecodeRecord(t *testing.T, input string, f Format) {
dec := NewDecoder(bytes.NewBufferString(input), f)
r, err := dec.DecodeAll()
if err != nil {
t.Fatal(err)
}
if len(r) != 1 {
t.Fatalf("expected 1 record; got %d", len(r))
}
}
func TestDecodeEncodeRoundtrip(t *testing.T) {
tests := []struct{ inF, outF Format }{
{MARC, MARC},
//{MARC, LineMARC},
//{LineMARC, LineMARC},
//{LineMarc, MARC},
{MARC, MARCXML},
{MARCXML, MARCXML},
//{MARCXML, LineMARC},
//{LineMarc, LineMarc},
//{LineMARC, MARCXML},
{MARCXML, MARC},
}
// buffer used for decoding and encoding
b := bytes.NewBufferString(sampleMARC)
for _, test := range tests {
dec := NewDecoder(b, test.inF)
r, err := dec.Decode()
if err != nil {
t.Fatal(err)
}
b.Reset()
enc := NewEncoder(b, test.outF)
err = enc.Encode(r)
if err != nil {
t.Fatal(err)
}
enc.Flush()
//fmt.Println(b.String())
dec = NewDecoder(b, test.outF)
r2, err := dec.Decode()
if err != nil {
t.Fatal(err)
}
if !r.Eq(r2) {
fmt.Printf("%v\n\n", r)
fmt.Printf("%v\n\n", r2)
t.Fatalf("decode %s -> encode %s roundtrip failed", test.inF, test.outF)
}
b.Reset()
enc = NewEncoder(b, test.outF)
err = enc.Encode(r)
if err != nil {
t.Fatal(err)
}
enc.Flush()
}
}
func BenchmarkDecodeBaseline(b *testing.B) {
for n := 0; n < b.N; n++ {
r := bufio.NewReader(bytes.NewBufferString(sampleLineMARC))
b.SetBytes(int64(len(sampleLineMARC)))
_, err := r.ReadBytes(0x5E)
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkDecodeMARC(b *testing.B) { benchmarkDecode(b, sampleMARC, MARC) }
func BenchmarkDecodeLineMARC(b *testing.B) { benchmarkDecode(b, sampleLineMARC, LineMARC) }
func BenchmarkDecodeMARCXML(b *testing.B) { benchmarkDecode(b, sampleMARCXML, MARCXML) }
func benchmarkDecode(b *testing.B, sample string, f Format) {
for n := 0; n < b.N; n++ {
b.SetBytes(int64(len(sample)))
dec := NewDecoder(bytes.NewBufferString(sample), f)
_, err := dec.Decode()
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkEncodeBaseline(b *testing.B) {
var w bytes.Buffer
for n := 0; n < b.N; n++ {
b.SetBytes(int64(len(sampleMARC)))
_, err := w.WriteString(sampleMARC)
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkEncodeMARC(b *testing.B) { benchmarkEncode(b, sampleMARC, MARC) }
func BenchmarkEncodeLineMARC(b *testing.B) { benchmarkEncode(b, sampleLineMARC, LineMARC) }
func BenchmarkEncodeMARCXML(b *testing.B) { benchmarkEncode(b, sampleMARCXML, MARCXML) }
func benchmarkEncode(b *testing.B, sample string, f Format) {
var w bytes.Buffer
dec := NewDecoder(bytes.NewBufferString(sample), f)
rec, err := dec.Decode()
if err != nil {
b.Fatal(err)
}
for n := 0; n < b.N; n++ {
b.SetBytes(int64(len(sample)))
enc := NewEncoder(&w, f)
err := enc.Encode(rec)
if err != nil {
b.Fatal(err)
}
}
}