gotosocial/vendor/github.com/dsoprea/go-exif/v3/testing_common.go
2022-01-23 14:41:31 +01:00

188 lines
4.6 KiB
Go

package exif
import (
"path"
"reflect"
"testing"
"io/ioutil"
"github.com/dsoprea/go-logging"
"github.com/dsoprea/go-exif/v3/common"
)
var (
testExifData []byte
)
func getExifSimpleTestIb() *IfdBuilder {
defer func() {
if state := recover(); state != nil {
err := log.Wrap(state.(error))
log.Panic(err)
}
}()
im := exifcommon.NewIfdMapping()
err := exifcommon.LoadStandardIfds(im)
log.PanicIf(err)
ti := NewTagIndex()
ib := NewIfdBuilder(im, ti, exifcommon.IfdStandardIfdIdentity, exifcommon.TestDefaultByteOrder)
err = ib.AddStandard(0x000b, "asciivalue")
log.PanicIf(err)
err = ib.AddStandard(0x00ff, []uint16{0x1122})
log.PanicIf(err)
err = ib.AddStandard(0x0100, []uint32{0x33445566})
log.PanicIf(err)
err = ib.AddStandard(0x013e, []exifcommon.Rational{{Numerator: 0x11112222, Denominator: 0x33334444}})
log.PanicIf(err)
return ib
}
func getExifSimpleTestIbBytes() []byte {
defer func() {
if state := recover(); state != nil {
err := log.Wrap(state.(error))
log.Panic(err)
}
}()
im := exifcommon.NewIfdMapping()
err := exifcommon.LoadStandardIfds(im)
log.PanicIf(err)
ti := NewTagIndex()
ib := NewIfdBuilder(im, ti, exifcommon.IfdStandardIfdIdentity, exifcommon.TestDefaultByteOrder)
err = ib.AddStandard(0x000b, "asciivalue")
log.PanicIf(err)
err = ib.AddStandard(0x00ff, []uint16{0x1122})
log.PanicIf(err)
err = ib.AddStandard(0x0100, []uint32{0x33445566})
log.PanicIf(err)
err = ib.AddStandard(0x013e, []exifcommon.Rational{{Numerator: 0x11112222, Denominator: 0x33334444}})
log.PanicIf(err)
ibe := NewIfdByteEncoder()
exifData, err := ibe.EncodeToExif(ib)
log.PanicIf(err)
return exifData
}
func validateExifSimpleTestIb(exifData []byte, t *testing.T) {
defer func() {
if state := recover(); state != nil {
err := log.Wrap(state.(error))
log.Panic(err)
}
}()
im := exifcommon.NewIfdMapping()
err := exifcommon.LoadStandardIfds(im)
log.PanicIf(err)
ti := NewTagIndex()
eh, index, err := Collect(im, ti, exifData)
log.PanicIf(err)
if eh.ByteOrder != exifcommon.TestDefaultByteOrder {
t.Fatalf("EXIF byte-order is not correct: %v", eh.ByteOrder)
} else if eh.FirstIfdOffset != ExifDefaultFirstIfdOffset {
t.Fatalf("EXIF first IFD-offset not correct: (0x%02x)", eh.FirstIfdOffset)
}
if len(index.Ifds) != 1 {
t.Fatalf("There wasn't exactly one IFD decoded: (%d)", len(index.Ifds))
}
ifd := index.RootIfd
if ifd.ByteOrder() != exifcommon.TestDefaultByteOrder {
t.Fatalf("IFD byte-order not correct.")
} else if ifd.ifdIdentity.UnindexedString() != exifcommon.IfdStandardIfdIdentity.UnindexedString() {
t.Fatalf("IFD name not correct.")
} else if ifd.ifdIdentity.Index() != 0 {
t.Fatalf("IFD index not zero: (%d)", ifd.ifdIdentity.Index())
} else if ifd.Offset() != uint32(0x0008) {
t.Fatalf("IFD offset not correct.")
} else if len(ifd.Entries()) != 4 {
t.Fatalf("IFD number of entries not correct: (%d)", len(ifd.Entries()))
} else if ifd.nextIfdOffset != uint32(0) {
t.Fatalf("Next-IFD offset is non-zero.")
} else if ifd.nextIfd != nil {
t.Fatalf("Next-IFD pointer is non-nil.")
}
// Verify the values by using the actual, original types (this is awesome).
expected := []struct {
tagId uint16
value interface{}
}{
{tagId: 0x000b, value: "asciivalue"},
{tagId: 0x00ff, value: []uint16{0x1122}},
{tagId: 0x0100, value: []uint32{0x33445566}},
{tagId: 0x013e, value: []exifcommon.Rational{{Numerator: 0x11112222, Denominator: 0x33334444}}},
}
for i, ite := range ifd.Entries() {
if ite.TagId() != expected[i].tagId {
t.Fatalf("Tag-ID for entry (%d) not correct: (0x%02x) != (0x%02x)", i, ite.TagId(), expected[i].tagId)
}
value, err := ite.Value()
log.PanicIf(err)
if reflect.DeepEqual(value, expected[i].value) != true {
t.Fatalf("Value for entry (%d) not correct: [%v] != [%v]", i, value, expected[i].value)
}
}
}
func getTestImageFilepath() string {
assetsPath := exifcommon.GetTestAssetsPath()
testImageFilepath := path.Join(assetsPath, "NDM_8901.jpg")
return testImageFilepath
}
func getTestExifData() []byte {
if testExifData == nil {
assetsPath := exifcommon.GetTestAssetsPath()
filepath := path.Join(assetsPath, "NDM_8901.jpg.exif")
var err error
testExifData, err = ioutil.ReadFile(filepath)
log.PanicIf(err)
}
return testExifData
}
func getTestGpsImageFilepath() string {
assetsPath := exifcommon.GetTestAssetsPath()
testGpsImageFilepath := path.Join(assetsPath, "gps.jpg")
return testGpsImageFilepath
}
func getTestGeotiffFilepath() string {
assetsPath := exifcommon.GetTestAssetsPath()
testGeotiffFilepath := path.Join(assetsPath, "geotiff_example.tif")
return testGeotiffFilepath
}