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header_test.go
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header_test.go
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// Copyright 2015 The astrogo 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 fitsio
import (
"fmt"
"io/ioutil"
"math"
"math/big"
"os"
"reflect"
"testing"
)
func newBigInt(t *testing.T) big.Int {
var i big.Int
_, err := fmt.Sscanf("40002100000000422948", "%v", &i)
if err != nil {
t.Fatalf("error creating a big.Int: %v\n", err)
}
return i
}
func TestHeaderRW(t *testing.T) {
curdir, err := os.Getwd()
if err != nil {
t.Fatalf(err.Error())
}
defer os.Chdir(curdir)
workdir, err := ioutil.TempDir("", "go-fitsio-test-")
if err != nil {
t.Fatalf(err.Error())
}
defer os.RemoveAll(workdir)
err = os.Chdir(workdir)
if err != nil {
t.Fatalf(err.Error())
}
table := struct {
name string
version int
cards []Card
bitpix int
axes []int
image interface{}
}{
name: "new.fits",
version: 2,
cards: []Card{
{
"EXTNAME",
"primary hdu",
"the primary HDU",
},
{
"EXTVER",
2,
"the primary hdu version",
},
{
"card_uint8",
byte(42),
"an uint8",
},
{
"card_uint16",
uint16(42),
"an uint16",
},
{
"card_uint32",
uint32(42),
"an uint32",
},
{
"card_uint64",
uint64(42),
"an uint64",
},
{
"card_int8",
int8(42),
"an int8",
},
{
"card_int16",
int16(42),
"an int16",
},
{
"card_int32",
int32(42),
"an int32",
},
{
"card_int64",
int64(42),
"an int64",
},
{
"card_int3264",
int(42),
"an int",
},
{
"card_uintxx",
uint(42),
"an uint",
},
{
"card_float32",
float32(666),
"a float32",
},
{
"card_float64",
float64(666),
"a float64",
},
{
"card_complex64",
complex(float32(42), float32(66)),
"a complex64",
},
{
"card_complex128",
complex(float64(42), float64(66)),
"a complex128",
},
{
"card_bigint",
newBigInt(t),
"a big int",
},
},
bitpix: 8,
axes: []int{},
}
fname := "new.fits"
for _, fct := range []func(){
// create
func() {
w, err := os.Create(fname)
if err != nil {
t.Fatalf("error creating new file [%v]: %v", fname, err)
}
defer w.Close()
f, err := Create(w)
if err != nil {
t.Fatalf("error creating new file [%v]: %v", fname, err)
}
defer f.Close()
phdr := NewHeader(
table.cards,
IMAGE_HDU,
table.bitpix,
table.axes,
)
phdu, err := NewPrimaryHDU(phdr)
if err != nil {
t.Fatalf("error creating PHDU: %v", err)
}
defer phdu.Close()
hdr := phdu.Header()
if hdr.bitpix != table.bitpix {
t.Fatalf("expected BITPIX=%v. got %v", table.bitpix, hdr.bitpix)
}
name := phdu.Name()
if name != "primary hdu" {
t.Fatalf("expected EXTNAME==%q. got %q", "primary hdu", name)
}
vers := phdu.Version()
if vers != table.version {
t.Fatalf("expected EXTVER==%v. got %v", table.version, vers)
}
card := hdr.Get("EXTNAME")
if card == nil {
t.Fatalf("error retrieving card [EXTNAME]")
}
if card.Comment != "the primary HDU" {
t.Fatalf("expected EXTNAME.Comment==%q. got %q", "the primary HDU", card.Comment)
}
card = hdr.Get("EXTVER")
if card == nil {
t.Fatalf("error retrieving card [EXTVER]")
}
if card.Comment != "the primary hdu version" {
t.Fatalf("expected EXTVER.Comment==%q. got %q", "the primary hdu version", card.Comment)
}
for _, ref := range table.cards {
card := hdr.Get(ref.Name)
if card == nil {
t.Fatalf("error retrieving card [%v]", ref.Name)
}
rv := reflect.ValueOf(ref.Value)
var val interface{}
switch rv.Type().Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
val = int(rv.Int())
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
val = int(rv.Uint())
case reflect.Float32, reflect.Float64:
val = rv.Float()
case reflect.Complex64, reflect.Complex128:
val = rv.Complex()
case reflect.String:
val = ref.Value.(string)
case reflect.Bool:
val = ref.Value.(bool)
case reflect.Struct:
switch ref.Value.(type) {
case big.Int:
val = ref.Value.(big.Int)
}
}
if !reflect.DeepEqual(card.Value, val) {
t.Fatalf(
"card %q. expected [%v](%T). got [%v](%T)",
ref.Name,
val, val,
card.Value, card.Value,
)
}
if card.Comment != ref.Comment {
t.Fatalf("card %q. comment differ. expected %q. got %q", ref.Name, ref.Comment, card.Comment)
}
}
card = hdr.Get("NOT THERE")
if card != nil {
t.Fatalf("expected no card. got [%v]", card)
}
err = f.Write(phdu)
if err != nil {
t.Fatalf("error writing hdu to file: %v", err)
}
},
// read-back
func() {
r, err := os.Open(fname)
if err != nil {
t.Fatalf("error opening file [%v]: %v", fname, err)
}
defer r.Close()
f, err := Open(r)
if err != nil {
buf, _ := ioutil.ReadFile(fname)
t.Fatalf("error opening file [%v]: %v\nbuf=%s\n", fname, err, string(buf))
}
defer f.Close()
hdu := f.HDU(0)
hdr := hdu.Header()
if hdr.bitpix != table.bitpix {
t.Fatalf("expected BITPIX=%v. got %v", 8, hdr.bitpix)
}
name := hdu.Name()
if name != "primary hdu" {
t.Fatalf("expected EXTNAME==%q. got %q", "primary hdu", name)
}
vers := hdu.Version()
if vers != table.version {
t.Fatalf("expected EXTVER==%v. got %v", 2, vers)
}
card := hdr.Get("EXTNAME")
if card == nil {
t.Fatalf("error retrieving card [EXTNAME]")
}
if card.Comment != "the primary HDU" {
t.Fatalf("expected EXTNAME.Comment==%q. got %q", "the primary HDU", card.Comment)
}
card = hdr.Get("EXTVER")
if card == nil {
t.Fatalf("error retrieving card [EXTVER]")
}
if card.Comment != "the primary hdu version" {
t.Fatalf("expected EXTVER.Comment==%q. got %q", "the primary hdu version", card.Comment)
}
for _, ref := range table.cards {
card := hdr.Get(ref.Name)
if card == nil {
t.Fatalf("error retrieving card [%v]", ref.Name)
}
rv := reflect.ValueOf(ref.Value)
var val interface{}
switch rv.Type().Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
val = int(rv.Int())
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
val = int(rv.Uint())
case reflect.Float32, reflect.Float64:
val = rv.Float()
case reflect.Complex64, reflect.Complex128:
val = rv.Complex()
case reflect.String:
val = ref.Value.(string)
case reflect.Bool:
val = ref.Value.(bool)
case reflect.Struct:
switch ref.Value.(type) {
case big.Int:
val = ref.Value.(big.Int)
}
}
if !reflect.DeepEqual(card.Value, val) {
t.Fatalf(
"card %q. expected [%v](%T). got [%v](%T)",
ref.Name,
val, val,
card.Value, card.Value,
)
}
if card.Comment != ref.Comment {
t.Fatalf("card %q. comment differ. expected %q. got %q", ref.Name, ref.Comment, card.Comment)
}
}
card = hdr.Get("NOT THERE")
if card != nil {
t.Fatalf("expected no card. got [%v]", card)
}
},
} {
fct()
}
}
func TestRWHeaderLine(t *testing.T) {
for _, table := range []struct {
line []byte
card *Card
err error
}{
{
line: []byte("SIMPLE = T / file does conform to FITS standard "),
card: &Card{
Name: "SIMPLE",
Value: true,
Comment: "file does conform to FITS standard",
},
err: nil,
},
{
line: []byte("BITPIX = 16 / number of bits per data pixel "),
card: &Card{
Name: "BITPIX",
Value: 16,
Comment: "number of bits per data pixel",
},
err: nil,
},
{
line: []byte("EXTNAME = 'primary hdu' / the primary HDU "),
card: &Card{
Name: "EXTNAME",
Value: "primary hdu",
Comment: "the primary HDU",
},
err: nil,
},
{
line: []byte("STRING = 'a / ' / comment "),
card: &Card{
Name: "STRING",
Value: "a /",
Comment: "comment",
},
err: nil,
},
{
line: []byte("STRING = ' a / ' / comment "),
card: &Card{
Name: "STRING",
Value: " a /",
Comment: "comment",
},
err: nil,
},
{
line: []byte("STRING = ' a / / comment |'"),
card: &Card{
Name: "STRING",
Value: " a / / comment |",
Comment: "",
},
err: nil,
},
{
line: []byte("STRING = ' a / / comment '"),
card: &Card{
Name: "STRING",
Value: " a / / comment",
Comment: "",
},
err: nil,
},
{
line: []byte("STRING = 'a / ''' / comment "),
card: &Card{
Name: "STRING",
Value: "a / '",
Comment: "comment",
},
err: nil,
},
{
line: []byte("COMPLEX = (42.0, 66.0) / comment "),
card: &Card{
Name: "COMPLEX",
Value: complex(42, 66),
Comment: "comment",
},
err: nil,
},
{
line: []byte("COMPLEX = (42.0,66.0) / comment "),
card: &Card{
Name: "COMPLEX",
Value: complex(42, 66),
Comment: "comment",
},
err: nil,
},
{
line: []byte("COMPLEX = (42,66) / comment "),
card: &Card{
Name: "COMPLEX",
Value: complex(42, 66),
Comment: "comment",
},
err: nil,
},
{
line: []byte("COMPLEX = (42.0,66) / comment "),
card: &Card{
Name: "COMPLEX",
Value: complex(42, 66),
Comment: "comment",
},
err: nil,
},
{
line: []byte("COMPLEX = (42,66.0) / comment "),
card: &Card{
Name: "COMPLEX",
Value: complex(42, 66),
Comment: "comment",
},
err: nil,
},
{
line: []byte("COMPLEX = (42.000,66.0000) / comment "),
card: &Card{
Name: "COMPLEX",
Value: complex(42, 66),
Comment: "comment",
},
err: nil,
},
} {
card, err := parseHeaderLine(table.line)
if !reflect.DeepEqual(err, table.err) {
t.Fatalf("expected error [%v]. got: %v", table.err, err)
}
if !reflect.DeepEqual(card, table.card) {
t.Fatalf("cards differ.\nexp= %#v\ngot= %#v", table.card, card)
}
line, err := makeHeaderLine(card)
if err != nil {
t.Fatalf("error making header-line: %v (%s)", err, string(line))
}
}
for _, table := range []struct {
line []byte
err error
}{
{
line: []byte("SIMPLE= T / FITS file"),
err: fmt.Errorf("fitsio: invalid header line length"),
},
{
line: []byte("STRING = 'foo / comment "),
err: fmt.Errorf(`fitsio: string ends prematurely ("'foo / comment ")`),
},
{
line: []byte("STRING = 'foo '' / comment "),
err: fmt.Errorf(`fitsio: string ends prematurely ("'foo '' / comment ")`),
},
} {
card, err := parseHeaderLine(table.line)
if !reflect.DeepEqual(err, table.err) {
t.Fatalf("expected error [%v]. got: %v\ncard=%#v", table.err, err, card)
}
if card != nil {
t.Fatalf("expected a nil card. got= %#v", card)
}
}
}
func TestMakeHeaderLine(t *testing.T) {
for _, table := range []struct {
card *Card
line []byte
err error
}{
{
card: &Card{
Name: "SIMPLE",
Value: true,
Comment: "file does conform to FITS standard",
},
line: []byte("SIMPLE = T / file does conform to FITS standard "),
err: nil,
},
{
line: []byte("STRING = ' a / / no-comment 1&'CONTINUE '2| ' COMMENT my-comment "),
card: &Card{
Name: "STRING",
Value: " a / / no-comment 12|",
Comment: "my-comment",
},
err: nil,
},
{
line: []byte("STRING = ' a / / no-comment 1&'CONTINUE '2| ' "),
card: &Card{
Name: "STRING",
Value: " a / / no-comment 12|",
Comment: "",
},
err: nil,
},
{
line: []byte("STRING = ' a / / no-comment |&'CONTINUE '0123456789012345678901234567890123456789012345678901234567890123456&'CONTINUE '7890123456789|' "),
card: &Card{
Name: "STRING",
Value: " a / / no-comment |01234567890123456789012345678901234567890123456789012345678901234567890123456789|",
Comment: "",
},
err: nil,
},
{
line: []byte("STRING = ' a / / no-comment |&'CONTINUE '0123456789012345678901234567890123456789012345678901234567890123456&'CONTINUE '7890123456789|' COMMENT my-comment "),
card: &Card{
Name: "STRING",
Value: " a / / no-comment |01234567890123456789012345678901234567890123456789012345678901234567890123456789|",
Comment: "my-comment",
},
err: nil,
},
{
line: []byte("COMMENT * "),
card: &Card{
Name: "COMMENT",
Value: "",
Comment: "*",
},
err: nil,
},
{
line: []byte("FLOAT64 = 1.1234567891234568 / small float value "),
card: &Card{
Name: "FLOAT64",
Value: float64(1.123456789123456789123456789),
Comment: "small float value",
},
err: nil,
},
{
line: []byte("FLOAT64 = 9.223372036854776E+18 / large float value "),
card: &Card{
Name: "FLOAT64",
Value: float64(9223372036854775807.123456789123456789123456789),
Comment: "large float value",
},
err: nil,
},
{
line: []byte("HIERARCH DIVFLOAT64= 0.6666666666666666 / infinit "),
card: &Card{
Name: "DIVFLOAT64",
Value: float64(2.0 / 3.0),
Comment: "infinit",
},
err: nil,
},
{
line: []byte("HIERARCH MAXFLOAT64= 1.7976931348623157E+308 / MaxFloat64 "),
card: &Card{
Name: "MAXFLOAT64",
Value: math.MaxFloat64,
Comment: "MaxFloat64",
},
err: nil,
},
{
line: []byte("HIERARCH SMALLESTNONZEROFLOAT= 5.00000E-324 / SmallestNonzeroFloat64 "),
card: &Card{
Name: "SMALLESTNONZEROFLOAT",
Value: math.SmallestNonzeroFloat64,
Comment: "SmallestNonzeroFloat64",
},
err: nil,
},
} {
line, err := makeHeaderLine(table.card)
if !reflect.DeepEqual(err, table.err) {
t.Fatalf("expected error [%v]. got: %v\nline=%q", table.err, err, string(line))
}
if !reflect.DeepEqual(line, table.line) {
t.Fatalf("bline differ.\nexp=%q\ngot=%q", string(table.line), string(line))
}
}
}
func TestDuplicateCardKeys(t *testing.T) {
r, err := os.Open("testdata/issue-38.fits")
if err != nil {
t.Fatal(err)
}
defer r.Close()
f, err := Open(r)
if err != nil {
t.Fatal(err)
}
defer f.Close()
hdu := f.HDU(0)
hdr := hdu.Header()
c := hdr.Get("DUP")
want := 1
if !reflect.DeepEqual(c.Value, want) {
t.Fatalf("got %v for duplicate key. want %v (the first one)", c.Value, want)
}
}