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JavaScript-Load-Image/test/test.js at master · fbricker/JavaScript-Load-Image · GitHub
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/*
* JavaScript Load Image Test
* https://github.com/blueimp/JavaScript-Load-Image
*
* Copyright 2011, Sebastian Tschan
* https://blueimp.net
*
* Licensed under the MIT license:
* http://www.opensource.org/licenses/MIT
*/
/* global describe, it, Blob */
;
(
function
(
expect
,
loadImage
)
{
'use strict'
var
canCreateBlob
=
!
!
window
.
dataURLtoBlob
// 80x60px GIF image (color black, base64 data):
var
b64DataGIF
=
'R0lGODdhUAA8AIABAAAAAP///ywAAAAAUAA8AAACS4SPqcvtD6'
+
'OctNqLs968+w+G4kiW5omm6sq27gvH8kzX9o3n+s73/g8MCofE'
+
'ovGITCqXzKbzCY1Kp9Sq9YrNarfcrvcLDovH5PKsAAA7'
var
imageUrlGIF
=
'data:image/gif;base64,'
+
b64DataGIF
var
blobGIF
=
canCreateBlob
&&
window
.
dataURLtoBlob
(
imageUrlGIF
)
// 2x1px JPEG (color white, with the Exif orientation flag set to 6):
var
b64DataJPEG
=
'/9j/4AAQSkZJRgABAQEAYABgAAD/4QAiRXhpZgAASUkqAAgAAA'
+
'ABABIBAwABAAAABgASAAAAAAD/2wBDAAEBAQEBAQEBAQEBAQEB'
+
'AQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQ'
+
'EBAQEBAQEBAQEBAQH/2wBDAQEBAQEBAQEBAQEBAQEBAQEBAQEB'
+
'AQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQ'
+
'EBAQEBAQH/wAARCAABAAIDASIAAhEBAxEB/8QAHwAAAQUBAQEB'
+
'AQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBA'
+
'QAAAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAk'
+
'M2JyggkKFhcYGRolJicoKSo0NTY3ODk6Q0RFRkdISUpTVFVWV1'
+
'hZWmNkZWZnaGlqc3R1dnd4eXqDhIWGh4iJipKTlJWWl5iZmqKj'
+
'pKWmp6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+'
+
'Tl5ufo6erx8vP09fb3+Pn6/8QAHwEAAwEBAQEBAQEBAQAAAAAA'
+
'AAECAwQFBgcICQoL/8QAtREAAgECBAQDBAcFBAQAAQJ3AAECAx'
+
'EEBSExBhJBUQdhcRMiMoEIFEKRobHBCSMzUvAVYnLRChYkNOEl'
+
'8RcYGRomJygpKjU2Nzg5OkNERUZHSElKU1RVVldYWVpjZGVmZ2'
+
'hpanN0dXZ3eHl6goOEhYaHiImKkpOUlZaXmJmaoqOkpaanqKmq'
+
'srO0tba3uLm6wsPExcbHyMnK0tPU1dbX2Nna4uPk5ebn6Onq8v'
+
'P09fb3+Pn6/9oADAMBAAIRAxEAPwD+/iiiigD/2Q=='
var
imageUrlJPEG
=
'data:image/jpeg;base64,'
+
b64DataJPEG
var
blobJPEG
=
canCreateBlob
&&
window
.
dataURLtoBlob
(
imageUrlJPEG
)
function
createBlob
(
data
,
type
)
{
try
{
return
new
Blob
(
[
data
]
,
{
type
:
type
}
)
}
catch
(
e
)
{
var
BlobBuilder
=
window
.
BlobBuilder
||
window
.
WebKitBlobBuilder
||
window
.
MozBlobBuilder
||
window
.
MSBlobBuilder
var
builder
=
new
BlobBuilder
(
)
builder
.
append
(
data
.
buffer
||
data
)
return
builder
.
getBlob
(
type
)
}
}
describe
(
'Loading'
,
function
(
)
{
it
(
'Return the img element or FileReader object to allow aborting the image load'
,
function
(
)
{
var
img
=
loadImage
(
blobGIF
,
function
(
)
{
return
}
)
expect
(
img
)
.
to
.
be
.
an
.
instanceOf
(
Object
)
expect
(
img
.
onload
)
.
to
.
be
.
a
(
'function'
)
expect
(
img
.
onerror
)
.
to
.
be
.
a
(
'function'
)
}
)
it
(
'Load image url'
,
function
(
done
)
{
expect
(
loadImage
(
imageUrlGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
80
)
expect
(
img
.
height
)
.
to
.
equal
(
60
)
done
(
)
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Load image blob'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
80
)
expect
(
img
.
height
)
.
to
.
equal
(
60
)
done
(
)
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Return image loading error to callback'
,
function
(
done
)
{
expect
(
loadImage
(
'404'
,
function
(
img
)
{
expect
(
img
)
.
to
.
be
.
an
.
instanceOf
(
window
.
Event
)
expect
(
img
.
type
)
.
to
.
equal
(
'error'
)
done
(
)
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Keep object URL if noRevoke is true'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
loadImage
(
img
.
src
,
function
(
img2
)
{
expect
(
img
.
width
)
.
to
.
equal
(
img2
.
width
)
expect
(
img
.
height
)
.
to
.
equal
(
img2
.
height
)
done
(
)
}
)
}
,
{
noRevoke
:
true
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Discard object URL if noRevoke is undefined or false'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
loadImage
(
img
.
src
,
function
(
img2
)
{
if
(
!
window
.
callPhantom
)
{
// revokeObjectUrl doesn't seem to have an effect in PhantomJS
expect
(
img2
)
.
to
.
be
.
an
.
instanceOf
(
window
.
Event
)
expect
(
img2
.
type
)
.
to
.
equal
(
'error'
)
}
done
(
)
}
)
}
)
)
.
to
.
be
.
ok
}
)
}
)
describe
(
'Scaling'
,
function
(
)
{
describe
(
'max/min'
,
function
(
)
{
it
(
'Scale to maxWidth'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
40
)
expect
(
img
.
height
)
.
to
.
equal
(
30
)
done
(
)
}
,
{
maxWidth
:
40
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Scale to maxHeight'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
20
)
expect
(
img
.
height
)
.
to
.
equal
(
15
)
done
(
)
}
,
{
maxHeight
:
15
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Scale to minWidth'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
160
)
expect
(
img
.
height
)
.
to
.
equal
(
120
)
done
(
)
}
,
{
minWidth
:
160
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Scale to minHeight'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
320
)
expect
(
img
.
height
)
.
to
.
equal
(
240
)
done
(
)
}
,
{
minHeight
:
240
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Scale to minWidth but respect maxWidth'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
160
)
expect
(
img
.
height
)
.
to
.
equal
(
120
)
done
(
)
}
,
{
minWidth
:
240
,
maxWidth
:
160
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Scale to minHeight but respect maxHeight'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
160
)
expect
(
img
.
height
)
.
to
.
equal
(
120
)
done
(
)
}
,
{
minHeight
:
180
,
maxHeight
:
120
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Scale to minWidth but respect maxHeight'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
160
)
expect
(
img
.
height
)
.
to
.
equal
(
120
)
done
(
)
}
,
{
minWidth
:
240
,
maxHeight
:
120
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Scale to minHeight but respect maxWidth'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
160
)
expect
(
img
.
height
)
.
to
.
equal
(
120
)
done
(
)
}
,
{
minHeight
:
180
,
maxWidth
:
160
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Scale up with the given pixelRatio'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
320
)
expect
(
img
.
height
)
.
to
.
equal
(
240
)
expect
(
img
.
style
.
width
)
.
to
.
equal
(
'160px'
)
expect
(
img
.
style
.
height
)
.
to
.
equal
(
'120px'
)
done
(
)
}
,
{
minWidth
:
160
,
canvas
:
true
,
pixelRatio
:
2
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Scale down with the given pixelRatio'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
80
)
expect
(
img
.
height
)
.
to
.
equal
(
60
)
expect
(
img
.
style
.
width
)
.
to
.
equal
(
'40px'
)
expect
(
img
.
style
.
height
)
.
to
.
equal
(
'30px'
)
done
(
)
}
,
{
maxWidth
:
40
,
canvas
:
true
,
pixelRatio
:
2
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Scale down with the given downsamplingRatio'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
20
)
expect
(
img
.
height
)
.
to
.
equal
(
15
)
done
(
)
}
,
{
maxWidth
:
20
,
canvas
:
true
,
downsamplingRatio
:
0.5
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Ignore max settings if image dimensions are smaller'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
80
)
expect
(
img
.
height
)
.
to
.
equal
(
60
)
done
(
)
}
,
{
maxWidth
:
160
,
maxHeight
:
120
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Ignore min settings if image dimensions are larger'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
80
)
expect
(
img
.
height
)
.
to
.
equal
(
60
)
done
(
)
}
,
{
minWidth
:
40
,
minHeight
:
30
}
)
)
.
to
.
be
.
ok
}
)
}
)
describe
(
'contain'
,
function
(
)
{
it
(
'Scale up to contain image in max dimensions'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
160
)
expect
(
img
.
height
)
.
to
.
equal
(
120
)
done
(
)
}
,
{
maxWidth
:
160
,
maxHeight
:
160
,
contain
:
true
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Scale down to contain image in max dimensions'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
40
)
expect
(
img
.
height
)
.
to
.
equal
(
30
)
done
(
)
}
,
{
maxWidth
:
40
,
maxHeight
:
40
,
contain
:
true
}
)
)
.
to
.
be
.
ok
}
)
}
)
describe
(
'cover'
,
function
(
)
{
it
(
'Scale up to cover max dimensions with image dimensions'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
160
)
expect
(
img
.
height
)
.
to
.
equal
(
120
)
done
(
)
}
,
{
maxWidth
:
120
,
maxHeight
:
120
,
cover
:
true
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Scale down to cover max dimensions with image dimensions'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
40
)
expect
(
img
.
height
)
.
to
.
equal
(
30
)
done
(
)
}
,
{
maxWidth
:
30
,
maxHeight
:
30
,
cover
:
true
}
)
)
.
to
.
be
.
ok
}
)
}
)
}
)
describe
(
'Cropping'
,
function
(
)
{
it
(
'Crop to same values for maxWidth and maxHeight'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
40
)
expect
(
img
.
height
)
.
to
.
equal
(
40
)
done
(
)
}
,
{
maxWidth
:
40
,
maxHeight
:
40
,
crop
:
true
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Crop to different values for maxWidth and maxHeight'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
40
)
expect
(
img
.
height
)
.
to
.
equal
(
60
)
done
(
)
}
,
{
maxWidth
:
40
,
maxHeight
:
60
,
crop
:
true
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Crop using the given sourceWidth and sourceHeight dimensions'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
40
)
expect
(
img
.
height
)
.
to
.
equal
(
40
)
done
(
)
}
,
{
sourceWidth
:
40
,
sourceHeight
:
40
,
crop
:
true
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Crop using the given left and top coordinates'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
40
)
expect
(
img
.
height
)
.
to
.
equal
(
20
)
done
(
)
}
,
{
left
:
40
,
top
:
40
,
crop
:
true
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Crop using the given right and bottom coordinates'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
40
)
expect
(
img
.
height
)
.
to
.
equal
(
20
)
done
(
)
}
,
{
right
:
40
,
bottom
:
40
,
crop
:
true
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Crop using the given 2:1 aspectRatio'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
80
)
expect
(
img
.
height
)
.
to
.
equal
(
40
)
done
(
)
}
,
{
aspectRatio
:
2
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Crop using the given 2:3 aspectRatio'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
40
)
expect
(
img
.
height
)
.
to
.
equal
(
60
)
done
(
)
}
,
{
aspectRatio
:
2
/
3
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Crop using maxWidth/maxHeight with the given pixelRatio'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
80
)
expect
(
img
.
height
)
.
to
.
equal
(
80
)
expect
(
img
.
style
.
width
)
.
to
.
equal
(
'40px'
)
expect
(
img
.
style
.
height
)
.
to
.
equal
(
'40px'
)
done
(
)
}
,
{
maxWidth
:
40
,
maxHeight
:
40
,
crop
:
true
,
pixelRatio
:
2
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Crop using sourceWidth/sourceHeight with the given pixelRatio'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
80
)
expect
(
img
.
height
)
.
to
.
equal
(
80
)
expect
(
img
.
style
.
width
)
.
to
.
equal
(
'40px'
)
expect
(
img
.
style
.
height
)
.
to
.
equal
(
'40px'
)
done
(
)
}
,
{
sourceWidth
:
40
,
sourceHeight
:
40
,
crop
:
true
,
pixelRatio
:
2
}
)
)
.
to
.
be
.
ok
}
)
}
)
describe
(
'Orientation'
,
function
(
)
{
it
(
'Should keep the orientation'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
80
)
expect
(
img
.
height
)
.
to
.
equal
(
60
)
done
(
)
}
,
{
orientation
:
1
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Should rotate left'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
60
)
expect
(
img
.
height
)
.
to
.
equal
(
80
)
done
(
)
}
,
{
orientation
:
8
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Should rotate right'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
60
)
expect
(
img
.
height
)
.
to
.
equal
(
80
)
done
(
)
}
,
{
orientation
:
6
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Should adjust constraints to new coordinates'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
30
)
expect
(
img
.
height
)
.
to
.
equal
(
40
)
done
(
)
}
,
{
orientation
:
6
,
maxWidth
:
30
,
maxHeight
:
40
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Should adjust left and top to new coordinates'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
30
)
expect
(
img
.
height
)
.
to
.
equal
(
60
)
done
(
)
}
,
{
orientation
:
5
,
left
:
30
,
top
:
20
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Should adjust right and bottom to new coordinates'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
30
)
expect
(
img
.
height
)
.
to
.
equal
(
60
)
done
(
)
}
,
{
orientation
:
5
,
right
:
30
,
bottom
:
20
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Should adjust left and bottom to new coordinates'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
30
)
expect
(
img
.
height
)
.
to
.
equal
(
60
)
done
(
)
}
,
{
orientation
:
7
,
left
:
30
,
bottom
:
20
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Should adjust right and top to new coordinates'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
30
)
expect
(
img
.
height
)
.
to
.
equal
(
60
)
done
(
)
}
,
{
orientation
:
7
,
right
:
30
,
top
:
20
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Should rotate left with the given pixelRatio'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
120
)
expect
(
img
.
height
)
.
to
.
equal
(
160
)
expect
(
img
.
style
.
width
)
.
to
.
equal
(
'60px'
)
expect
(
img
.
style
.
height
)
.
to
.
equal
(
'80px'
)
done
(
)
}
,
{
orientation
:
8
,
pixelRatio
:
2
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Should rotate right with the given pixelRatio'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
120
)
expect
(
img
.
height
)
.
to
.
equal
(
160
)
expect
(
img
.
style
.
width
)
.
to
.
equal
(
'60px'
)
expect
(
img
.
style
.
height
)
.
to
.
equal
(
'80px'
)
done
(
)
}
,
{
orientation
:
6
,
pixelRatio
:
2
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Should ignore too small orientation value'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
80
)
expect
(
img
.
height
)
.
to
.
equal
(
60
)
done
(
)
}
,
{
orientation
:
-
1
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Should ignore too large orientation value'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
80
)
expect
(
img
.
height
)
.
to
.
equal
(
60
)
done
(
)
}
,
{
orientation
:
9
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Should rotate right based on the exif orientation value'
,
function
(
done
)
{
expect
(
loadImage
(
blobJPEG
,
function
(
img
,
data
)
{
expect
(
data
)
.
to
.
be
.
ok
expect
(
data
.
exif
)
.
to
.
be
.
ok
expect
(
data
.
exif
.
get
(
'Orientation'
)
)
.
to
.
equal
(
6
)
expect
(
img
.
width
)
.
to
.
equal
(
1
)
expect
(
img
.
height
)
.
to
.
equal
(
2
)
done
(
)
}
,
{
orientation
:
true
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Should adjust constraints based on the exif orientation value'
,
function
(
done
)
{
expect
(
loadImage
(
blobJPEG
,
function
(
img
)
{
expect
(
img
.
width
)
.
to
.
equal
(
10
)
expect
(
img
.
height
)
.
to
.
equal
(
20
)
done
(
)
}
,
{
orientation
:
true
,
minWidth
:
10
,
minHeight
:
20
}
)
)
.
to
.
be
.
ok
}
)
}
)
describe
(
'Canvas'
,
function
(
)
{
it
(
'Return img element to callback if canvas is not true'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
getContext
)
.
to
.
not
.
be
.
ok
expect
(
img
.
nodeName
.
toLowerCase
(
)
)
.
to
.
equal
(
'img'
)
done
(
)
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Return canvas element to callback if canvas is true'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
getContext
)
.
to
.
be
.
ok
expect
(
img
.
nodeName
.
toLowerCase
(
)
)
.
to
.
equal
(
'canvas'
)
done
(
)
}
,
{
canvas
:
true
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Return scaled canvas element to callback'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
expect
(
img
.
getContext
)
.
to
.
be
.
ok
expect
(
img
.
nodeName
.
toLowerCase
(
)
)
.
to
.
equal
(
'canvas'
)
expect
(
img
.
width
)
.
to
.
equal
(
40
)
expect
(
img
.
height
)
.
to
.
equal
(
30
)
done
(
)
}
,
{
canvas
:
true
,
maxWidth
:
40
}
)
)
.
to
.
be
.
ok
}
)
it
(
'Accept a canvas element as parameter for loadImage.scale'
,
function
(
done
)
{
expect
(
loadImage
(
blobGIF
,
function
(
img
)
{
img
=
loadImage
.
scale
(
img
,
{
maxWidth
:
40
}
)
expect
(
img
.
getContext
)
.
to
.
be
.
ok
expect
(
img
.
nodeName
.
toLowerCase
(
)
)
.
to
.
equal
(
'canvas'
)
expect
(
img
.
width
)
.
to
.
equal
(
40
)
expect
(
img
.
height
)
.
to
.
equal
(
30
)
done
(
)
}
,
{
canvas
:
true
}
)
)
.
to
.
be
.
ok
}
)
}
)
describe
(
'Metadata'
,
function
(
)
{
it
(
'Should parse Exif information'
,
function
(
done
)
{
loadImage
.
parseMetaData
(
blobJPEG
,
function
(
data
)
{
expect
(
data
.
exif
)
.
to
.
be
.
ok
expect
(
data
.
exif
.
get
(
'Orientation'
)
)
.
to
.
equal
(
6
)
done
(
)
}
)
}
)
it
(
'Should parse the complete image head'
,
function
(
done
)
{
loadImage
.
parseMetaData
(
blobJPEG
,
function
(
data
)
{
expect
(
data
.
imageHead
)
.
to
.
be
.
ok
loadImage
.
parseMetaData
(
createBlob
(
data
.
imageHead
,
'image/jpeg'
)
,
function
(
data
)
{
expect
(
data
.
exif
)
.
to
.
be
.
ok
expect
(
data
.
exif
.
get
(
'Orientation'
)
)
.
to
.
equal
(
6
)
done
(
)
}
)
}
)
}
)
it
(
'Should parse meta data automatically'
,
function
(
done
)
{
expect
(
loadImage
(
blobJPEG
,
function
(
img
,
data
)
{
expect
(
data
)
.
to
.
be
.
ok
expect
(
data
.
imageHead
)
.
to
.
be
.
ok
expect
(
data
.
exif
)
.
to
.
be
.
ok
expect
(
data
.
exif
.
get
(
'Orientation'
)
)
.
to
.
equal
(
6
)
done
(
)
}
,
{
meta
:
true
}
)
)
.
to
.
be
.
ok
}
)
}
)
}
(
this
.
chai
.
expect
,
this
.
loadImage
)
)
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