Unexpected-image
Image metadata plugin for the Unexpected assertion library (version 7+ required). Uses GraphicsMagick, which must be installed on your system.
Images can be specified either as strings (file name or data: url) or as Buffer or Uint8Array instances.
The metadata will be extracted using gm identify via the gm
library and matched with
to satisfy semantics:
return expect('magic-pen-6-colours.jpg', 'to have metadata satisfying', {
format: 'JPEG',
'Channel Depths': {
Gray: '8 bits'
},
size: {
height: 400,
width: 200
}
});
expected
to have metadata satisfying
{
format: 'JPEG',
'Channel Depths': { Gray: '8 bits' },
size: { height: 400, width: 200 }
}
{
Format: 'JPEG (Joint Photographic Experts Group JFIF format)',
format: 'JPEG',
Geometry: '380x248',
size: {
width: 380,
//
should equal
200
height: 248
//
should equal
400
},
Class: 'DirectClass',
Type: 'true color',
Depth: '8 bits-per-pixel component',
depth: 8,
'Channel Depths': {
Red: '8 bits',
Green: '8 bits',
Blue: '8 bits'
// missing
Gray: '8 bits'
},
'Channel Statistics': {
Red: {
Minimum: '4626.00 (0.0706)',
Maximum: '65535.00 (1.0000)',
Mean: '59679.23 (0.9106)',
'Standard Deviation': '11628.66 (0.1774)'
},
Green: {
Minimum: '7710.00 (0.1176)',
Maximum: '65535.00 (1.0000)',
Mean: '57725.47 (0.8808)',
'Standard Deviation': '14235.62 (0.2172)'
},
Blue: {
Minimum: '0.00 (0.0000)',
Maximum: '65535.00 (1.0000)',
Mean: '54870.56 (0.8373)',
'Standard Deviation': '19212.51 (0.2932)'
}
},
Filesize: '13.2K',
Interlace: 'No',
Orientation: 'TopLeft',
'Background Color': 'white',
'Border Color': '#DFDFDF',
'Matte Color': '#BDBDBD',
'Page geometry': '380x248+0+0',
Compose: 'Over',
Dispose: 'Undefined',
Iterations: '0',
Compression: 'JPEG',
'JPEG-Quality': '85',
'JPEG-Colorspace': '2',
'JPEG-Colorspace-Name': 'RGB',
'JPEG-Sampling-factors': '2x2,1x1,1x1',
Signature: '5acb0f0d4e02a3b565f723d59290032e96df8c89989f41a71900741ce512beb4',
'Profile-EXIF': {
Orientation: '1', 'X Resolution': '72', 'Y Resolution': '72',
'Resolution Unit': '2', 'Date Time': '2014:07:13 16:21:04',
'Y Cb Cr Positioning': '1', 'Exif Offset': '144', 'Exif Version': '0221',
'Components Configuration': '\\001\\002\\003\\000',
'Flash Pix Version': '0100', 'Color Space': '1',
'Exif Image Width': '380', 'Exif Image Length': '248'
},
path: 'magic-pen-6-colours.jpg'
}
License
Unexpected-image is licensed under a standard 3-clause BSD license -- see
the LICENSE file for details.
