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import doctest
import os
import shutil
import sys
import tempfile
import unittest
try:
from cStringIO import StringIO
except ImportError:
from io import StringIO
import mock
import imgdiff
@mock.patch('sys.stderr', StringIO())
class TestMain(unittest.TestCase):
def setUp(self):
self.tmpdir = None
def tearDown(self):
if self.tmpdir:
shutil.rmtree(self.tmpdir)
def mkdtemp(self):
if self.tmpdir is None:
self.tmpdir = tempfile.mkdtemp(prefix='imgdiff-tests-')
return self.tmpdir
def main(self, *args):
try:
imgdiff.main(['imgdiff'] + list(args))
except SystemExit:
pass
def assertIn(self, member, container): # Python 2.6 compat
if member not in container:
self.fail('%s not found in %s' % (repr(member), repr(container)))
def test_color_parsing_in_options(self):
self.main('--bgcolor', 'invalid')
self.assertIn("error: option --bgcolor: invalid color value: 'invalid'",
sys.stderr.getvalue())
def test_wrong_number_of_arguments(self):
self.main('foo.png')
self.assertIn("error: expecting two arguments, got 1",
sys.stderr.getvalue())
self.main('foo.png', 'bar.png', 'baz.png')
self.assertIn("error: expecting two arguments, got 3",
sys.stderr.getvalue())
def test_two_directories(self):
self.main('set1', 'set2')
self.assertIn("error: at least one argument must be a file, not a directory",
sys.stderr.getvalue())
def test_all_ok(self):
self.main('example1.png', 'example2.png', '--viewer=true')
def test_highlight(self):
self.main('example1.png', 'example2.png', '-H', '--viewer=true')
def test_smart_highlight(self):
self.main('example1.png', 'example2.png', '-S', '--viewer=true')
def test_outfile(self):
fn = os.path.join(self.mkdtemp(), 'diff.png')
self.main('example1.png', 'example2.png', '-o', fn)
self.assertTrue(os.path.exists(fn))
@mock.patch('imgdiff.Image.Image.show')
def test_builtin_viewer(self, mock_show):
self.main('example1.png', 'example2.png')
self.assertTrue(mock_show.called)
def test_one_directory(self):
self.main('set1/canary.png', 'set2', '--viewer', 'true')
self.main('set1', 'set2/canary.png', '--viewer', 'true', '--tb')
def test_different_size_images(self):
# tickle the unexplored branches in best_diff()
self.main('set1/extra-info.png', 'set1/sample-graph.png', '--viewer=true', '-H', '--timeout=1')
def test_different_size_images_sloow(self):
# tickle the unexplored branches in slow_highlight()
self.main('set1/extra-info.png', 'set1/sample-graph.png', '--viewer=true', '-S', '--timeout=10')
class TestProgress(unittest.TestCase):
def test_terminal_output(self):
p = imgdiff.Progress(3, delay=0)
p.stream = StringIO()
p.isatty = True
for n in range(3):
p.next()
p.done()
self.assertEqual(p.stream.getvalue(),
'\r33% (1 out of 3 possible alignments)'
'\r66% (2 out of 3 possible alignments)'
'\r100% (3 out of 3 possible alignments)'
'\r\n')
def test_not_a_terminal(self):
p = imgdiff.Progress(3, delay=0)
p.stream = StringIO()
p.isatty = False
for n in range(3):
p.next()
p.done()
self.assertEqual(p.stream.getvalue(), '')
def test_timeout(self):
p = imgdiff.Progress(3, timeout=1)
p.stream = StringIO()
p.isatty = False
p.started -= 2 # so it seems we started a second ago
self.assertRaises(imgdiff.Timeout, p.next)
p.done()
self.assertEqual(p.stream.getvalue(),
'Highlighting takes too long: timed out after 1 seconds\n')
def test_suite():
return unittest.TestSuite([
doctest.DocTestSuite(imgdiff),
unittest.defaultTestLoader.loadTestsFromName(__name__),
])
if __name__ == '__main__':
unittest.main(defaultTest='test_suite')
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