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_compare_eq_sequence: display number of extra items

This commit is contained in:
Daniel Hahler 2019-04-02 17:21:14 +02:00
parent e04936fc29
commit 5fec793bc7
1 changed files with 10 additions and 7 deletions
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17
src/_pytest/assertion/util.py
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@ -285,19 +285,22 @@ def _compare_eq_iterable(left, right, verbose=0):
def _compare_eq_sequence(left, right, verbose=0):
explanation = []
for i in range(min(len(left), len(right))):
len_left = len(left)
len_right = len(right)
for i in range(min(len_left, len_right)):
if left[i] != right[i]:
explanation += [u"At index %s diff: %r != %r" % (i, left[i], right[i])]
break
if len(left) > len(right):
len_diff = len_left - len_right
if len_diff > 0:
explanation += [
u"Left contains more items, first extra item: %s"
% saferepr(left[len(right)])
u"Left contains %d more items, first extra item: %s"
% (len_diff, saferepr(left[len_right]))
]
elif len(left) < len(right):
elif len_diff < 0:
explanation += [
u"Right contains more items, first extra item: %s"
% saferepr(right[len(left)])
u"Right contains %d more items, first extra item: %s"
% (0 - len_diff, saferepr(right[len_left]))
]
return explanation