def test_context_excludes_bordering_unchanged(self):
lines = [("line %d" % i) for i in range(10)]
changed_lines = lines[:4] + ['one line', 'another line'] + lines[6:]
diff = side_by_side_diff('\n'.join(lines), '\n'.join(changed_lines))
diff, diff_clone = itertools.tee(diff)
self.assertEqual(list(context_diff(diff)),
[(2, 2, list(diff_clone)[2:8])])
def test_user_defined_context(self):
lines = [("line %d" % i) for i in range(12)]
changed_lines = lines[:5] + ['one line', 'another line'] + lines[7:]
diff = side_by_side_diff('\n'.join(lines), '\n'.join(changed_lines))
diff, diff_clone = itertools.tee(diff)
self.assertEqual(list(context_diff(diff, context=4)),
[(1, 1, list(diff_clone)[1:11])])
def test_context_excludes_final_unchanged(self):
lines = [("line %d" % i) for i in range(5)]
changed_lines = ['one line', 'another line'] + lines[2:]
diff = side_by_side_diff('\n'.join(lines), '\n'.join(changed_lines))
diff, diff_clone = itertools.tee(diff)
self.assertEqual(list(context_diff(diff)),
[(0, 0, list(diff_clone)[:-1])])
def test_context_excludes_initial_unchanged(self):
lines = [("line %d" % i) for i in range(5)]
changed_lines = lines[:3] + ['one line', 'another line']
diff = side_by_side_diff('\n'.join(lines), '\n'.join(changed_lines))
diff, diff_clone = itertools.tee(diff)
self.assertEqual(list(context_diff(diff)),
[(1, 1, list(diff_clone)[1:])])
def test_bordering_contexts_are_merged(self):
lines = [("line %d" % i) for i in range(12)]
changed_lines = (lines[:3] + ['one line'] + lines[4:8]
+ ['another one'] + lines[9:])
diff = side_by_side_diff('\n'.join(lines), '\n'.join(changed_lines))
diff, diff_clone = itertools.tee(diff)
self.assertEqual(list(context_diff(diff)),
[(1, 1, list(diff_clone)[1:11])])
def test_deletion_context(self):
lines = [("line %d" % i) for i in range(15)]
changed_lines = (lines[:3] + lines[5:10]
+ ['third line', 'forth line'] + lines[12:])
diff = side_by_side_diff('\n'.join(lines), '\n'.join(changed_lines))
diff, diff_clone = itertools.tee(diff)
diff_clone = list(diff_clone)
self.assertEqual(list(context_diff(diff)),
[(1, 1, diff_clone[1:7]),
(8, 6, diff_clone[8:14])])
def test_insertion_context(self):
lines = [("line %d" % i) for i in range(13)]
changed_lines = (lines[:3] + ['one line', 'another line'] + lines[3:8]
+ ['third line', 'forth line'] + lines[10:])
diff = side_by_side_diff('\n'.join(lines), '\n'.join(changed_lines))
diff, diff_clone = itertools.tee(diff)
diff_clone = list(diff_clone)
self.assertEqual(list(context_diff(diff)),
[(1, 1, diff_clone[1:7]),
(6, 8, diff_clone[8:14])])
def test_multiple_contexts(self):
lines = [("line %d" % i) for i in range(20)]
changed_lines = (lines[:4] + ['one line', 'another line'] + lines[6:14]
+ ['third line', 'forth line'] + lines[16:])
diff = side_by_side_diff('\n'.join(lines), '\n'.join(changed_lines))
diff, diff_clone = itertools.tee(diff)
diff_clone = list(diff_clone)
self.assertEqual(list(context_diff(diff)),
[(2, 2, diff_clone[2:8]),
(12, 12, diff_clone[12:18])])
def test_full_change_merged_contexts(self):
lines = [("line %d" % i) for i in range(30)]
changed_lines = (lines[:3] + ['one line', 'another line'] + lines[5:9]
+ ['third line', 'forth line'] + lines[9:13]
+ ['one more line', 'yet another'] + lines[15:19]
+ lines[21:25]
+ ['nearly last', 'possibly last line'] + lines[27:])
diff = side_by_side_diff('\n'.join(lines), '\n'.join(changed_lines))
diff, diff_clone = itertools.tee(diff)
diff_clone = list(diff_clone)
self.assertEqual(list(context_diff(diff)),
[(1, 1, diff_clone[1:31])])
def test_full_change_contexts(self):
lines = [("line %d" % i) for i in range(34)]
changed_lines = (lines[:3] + ['one line', 'another line'] + lines[5:10]
+ ['third line', 'forth line'] + lines[10:15]
+ ['one more line', 'yet another'] + lines[17:22]
+ lines[24:29]
+ ['nearly last', 'possibly last line'] + lines[31:])
diff = side_by_side_diff('\n'.join(lines), '\n'.join(changed_lines))
diff, diff_clone = itertools.tee(diff)
diff_clone = list(diff_clone)
self.assertEqual(list(context_diff(diff)),
[(1, 1, diff_clone[1:7]),
(8, 8, diff_clone[8:14]),
(13, 15, diff_clone[15:21]),
(20, 22, diff_clone[22:28]),
(27, 27, diff_clone[29:35])])
def render(self, context):
try:
old_value = self.old_value.resolve(context)
except VariableDoesNotExist:
raise TemplateSyntaxError('"cache" tag got an unknown variable: %r'
% self.old_value)
try:
new_value = self.new_value.resolve(context)
except VariableDoesNotExist:
raise TemplateSyntaxError('"cache" tag got an unknown variable: %r'
% self.old_value)
old_text = force_unicode(old_value) if old_value else ''
new_text = force_unicode(new_value) if new_value else ''
diff = side_by_side_diff(old_text, new_text)
contextual_diff = context_diff(diff, context=self.context_width)
context.push()
diff_str = render_to_string('wikify/contextual_diff_tr.html',
{'context_diff': contextual_diff},
context)
context.pop()
return diff_str
def test_multi_line_change_is_included(self):
diff = side_by_side_diff("old text\nline\nanother line",
"new text\nline\nsome line")
diff, diff_clone = itertools.tee(diff)
self.assertEqual(list(context_diff(diff)),
[(0, 0, list(diff_clone))])
def test_small_change_is_included(self):
diff = side_by_side_diff("old text",
"new text")
diff, diff_clone = itertools.tee(diff)
self.assertEqual(list(context_diff(diff)),
[(0, 0, list(diff_clone))])
