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__init__.py
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__init__.py
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import
os
,
sys
import
functools
import
unittest
import
random
from
distutils
.
spawn
import
find_executable
from
subprocess
import
check_output
,
PIPE
from
os
.
path
import
dirname
,
abspath
,
isdir
,
join
,
basename
,
splitext
,
relpath
from
glob
import
glob
from
pdb
import
set_trace
as
tron
tests_root
=
dirname
(
abspath
(
__file__
))
sdist_root
=
dirname
(
tests_root
)
sys
.
path
.
append
(
sdist_root
)
sys
.
path
.
append
(
join
(
sdist_root
,
'build/lib'
))
try
:
from
plotdevice
import
_ctx
,
measure
def
reference
(
image_path
):
"""Write the canvas out to disk and compare the output with a reference image"""
def
decorator
(
test_method
):
@
functools
.
wraps
(
test_method
)
def
wrapper
(
*
args
,
**
kwargs
):
obj
=
args
[
0
]
obj
.
_image
=
image_path
test_method
(
*
args
,
**
kwargs
)
obj
.
render
()
return
wrapper
return
decorator
class
PlotDeviceTestCase
(
unittest
.
TestCase
):
@
classmethod
def
setUpClass
(
cls
):
# make sure the diff & output dirs exist
cat
=
cls
.
__name__
.
replace
(
'Tests'
,
''
).
lower
()
for
subdir
in
(
'_out'
,
'_diff'
):
img_dir
=
join
(
tests_root
,
subdir
,
cat
)
if
not
isdir
(
img_dir
):
os
.
makedirs
(
img_dir
)
def
setUp
(
self
):
# zap any previous state
_ctx
.
clear
(
all
)
_ctx
.
_resetEnvironment
()
random
.
seed
(
123456790
)
def
render
(
self
,
save_output
=
True
):
"""Write the current canvas image to _out/ and generate a diff image in _diff/"""
ref
,
out
,
diff
=
[
join
(
tests_root
,
subdir
,
self
.
_image
)
for
subdir
in
(
'_ref'
,
'_out'
,
'_diff'
)]
# write the generated image to the output dir
if
save_output
:
bg
=
_ctx
.
canvas
.
background
if
'Pattern'
in
str
(
type
(
bg
))
or
getattr
(
bg
,
'alpha'
,
0
)
>
0
:
_ctx
.
background
(
bg
)
else
:
_ctx
.
background
(
join
(
tests_root
,
'_in/transparency-grid.png'
))
_ctx
.
canvas
.
save
(
out
)
# compare the 'out' vs 'ref' image and write a 'diff' image
_ctx
.
clear
(
all
)
_ctx
.
_resetEnvironment
()
_ctx
.
size
(
*
measure
(
image
=
ref
))
_ctx
.
image
(
ref
)
_ctx
.
blend
(
'difference'
)
_ctx
.
image
(
out
)
_ctx
.
canvas
.
save
(
diff
)
except
(
ImportError
,
RuntimeError
)
as
e
:
pass
def
suites
():
from
.
import
typography
,
primitives
,
drawing
,
compositing
,
geometry
,
module
suite
=
unittest
.
TestSuite
()
for
mod
in
(
typography
,
primitives
,
drawing
,
compositing
,
geometry
,
module
):
suite
.
addTest
(
mod
.
suite
())
return
suite
def
report
():
"""Create an html document presenting all the rendered images, their references, and the diff between them"""
with
open
(
'details.html'
,
'w'
)
as
f
:
f
.
write
(
html_head
)
for
pth
in
glob
(
'tests/_out/*/*'
):
img
=
relpath
(
pth
,
'tests/_out'
)
name
=
splitext
(
img
)[
0
]
f
.
write
(
result_div
%
{
"name"
:
name
,
"img"
:
img
})
f
.
write
(
html_foot
)
print
(
"See details.html for case-by-case test comparisons"
)
html_head
=
"""
<!DOCTYPE html>
<html>
<head>
<style>
body{color:white; background:black;}
h1{font-family:Avenir;}
h2{font:14px/18px Courier;}
.test-case{overflow:auto;}
.result{
float:left;
margin-right:1em;
border:1px solid #444;
max-width:30%;
position:relative;
}
.result img{
display:block;
background:white;
max-width:100%;
}
</style>
</head>
<body>
"""
result_div
=
"""<h2>%(name)s</h2>
<div class="test-case">
<div class="result"><img title="goal" src="tests/_ref/%(img)s"></div>
<div class="result"><img title="test result" src="tests/_out/%(img)s"></div>
<div class="result"><img title="difference" src="tests/_diff/%(img)s"></div>
</div>
"""
html_foot
=
"""
</body>
</html>
"""
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