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76 changes: 34 additions & 42 deletions src/_pytest/assertion/util.py
Original file line number Diff line number Diff line change
Expand Up @@ -11,8 +11,6 @@
import _pytest._code
from ..compat import Sequence

u = six.text_type

# The _reprcompare attribute on the util module is used by the new assertion
# interpretation code and assertion rewriter to detect this plugin was
# loaded and in turn call the hooks defined here as part of the
Expand All @@ -23,9 +21,9 @@
# the re-encoding is needed for python2 repr
# with non-ascii characters (see issue 877 and 1379)
def ecu(s):
try:
return u(s, "utf-8", "replace")
except TypeError:
if isinstance(s, bytes):
return s.decode("UTF-8", "replace")
else:
return s


Expand All @@ -42,7 +40,7 @@ def format_explanation(explanation):
explanation = ecu(explanation)
lines = _split_explanation(explanation)
result = _format_lines(lines)
return u("\n").join(result)
return u"\n".join(result)


def _split_explanation(explanation):
Expand All @@ -52,7 +50,7 @@ def _split_explanation(explanation):
Any other newlines will be escaped and appear in the line as the
literal '\n' characters.
"""
raw_lines = (explanation or u("")).split("\n")
raw_lines = (explanation or u"").split("\n")
lines = [raw_lines[0]]
for values in raw_lines[1:]:
if values and values[0] in ["{", "}", "~", ">"]:
Expand All @@ -77,13 +75,13 @@ def _format_lines(lines):
for line in lines[1:]:
if line.startswith("{"):
if stackcnt[-1]:
s = u("and ")
s = u"and "
else:
s = u("where ")
s = u"where "
stack.append(len(result))
stackcnt[-1] += 1
stackcnt.append(0)
result.append(u(" +") + u(" ") * (len(stack) - 1) + s + line[1:])
result.append(u" +" + u" " * (len(stack) - 1) + s + line[1:])
elif line.startswith("}"):
stack.pop()
stackcnt.pop()
Expand All @@ -92,7 +90,7 @@ def _format_lines(lines):
assert line[0] in ["~", ">"]
stack[-1] += 1
indent = len(stack) if line.startswith("~") else len(stack) - 1
result.append(u(" ") * indent + line[1:])
result.append(u" " * indent + line[1:])
assert len(stack) == 1
return result

Expand All @@ -110,7 +108,7 @@ def assertrepr_compare(config, op, left, right):
left_repr = py.io.saferepr(left, maxsize=int(width // 2))
right_repr = py.io.saferepr(right, maxsize=width - len(left_repr))

summary = u("%s %s %s") % (ecu(left_repr), op, ecu(right_repr))
summary = u"%s %s %s" % (ecu(left_repr), op, ecu(right_repr))

def issequence(x):
return isinstance(x, Sequence) and not isinstance(x, basestring)
Expand Down Expand Up @@ -155,11 +153,9 @@ def isiterable(obj):
explanation = _notin_text(left, right, verbose)
except Exception:
explanation = [
u(
"(pytest_assertion plugin: representation of details failed. "
"Probably an object has a faulty __repr__.)"
),
u(_pytest._code.ExceptionInfo()),
u"(pytest_assertion plugin: representation of details failed. "
u"Probably an object has a faulty __repr__.)",
six.text_type(_pytest._code.ExceptionInfo()),
]

if not explanation:
Expand Down Expand Up @@ -203,8 +199,7 @@ def escape_for_readable_diff(binary_text):
if i > 42:
i -= 10 # Provide some context
explanation = [
u("Skipping %s identical leading characters in diff, use -v to show")
% i
u"Skipping %s identical leading characters in diff, use -v to show" % i
]
left = left[i:]
right = right[i:]
Expand All @@ -215,11 +210,8 @@ def escape_for_readable_diff(binary_text):
if i > 42:
i -= 10 # Provide some context
explanation += [
u(
"Skipping %s identical trailing "
"characters in diff, use -v to show"
)
% i
u"Skipping {} identical trailing "
u"characters in diff, use -v to show".format(i)
]
left = left[:-i]
right = right[:-i]
Expand All @@ -237,21 +229,21 @@ def escape_for_readable_diff(binary_text):

def _compare_eq_iterable(left, right, verbose=False):
if not verbose:
return [u("Use -v to get the full diff")]
return [u"Use -v to get the full diff"]
# dynamic import to speedup pytest
import difflib

try:
left_formatting = pprint.pformat(left).splitlines()
right_formatting = pprint.pformat(right).splitlines()
explanation = [u("Full diff:")]
explanation = [u"Full diff:"]
except Exception:
# hack: PrettyPrinter.pformat() in python 2 fails when formatting items that can't be sorted(), ie, calling
# sorted() on a list would raise. See issue #718.
# As a workaround, the full diff is generated by using the repr() string of each item of each container.
left_formatting = sorted(repr(x) for x in left)
right_formatting = sorted(repr(x) for x in right)
explanation = [u("Full diff (fallback to calling repr on each item):")]
explanation = [u"Full diff (fallback to calling repr on each item):"]
explanation.extend(
line.strip() for line in difflib.ndiff(left_formatting, right_formatting)
)
Expand All @@ -262,16 +254,16 @@ def _compare_eq_sequence(left, right, verbose=False):
explanation = []
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])]
explanation += [u"At index %s diff: %r != %r" % (i, left[i], right[i])]
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at the diff i noted that we should use saferepr here, perhaps a nice followup

break
if len(left) > len(right):
explanation += [
u("Left contains more items, first extra item: %s")
u"Left contains more items, first extra item: %s"
% py.io.saferepr(left[len(right)])
]
elif len(left) < len(right):
explanation += [
u("Right contains more items, first extra item: %s")
u"Right contains more items, first extra item: %s"
% py.io.saferepr(right[len(left)])
]
return explanation
Expand All @@ -282,11 +274,11 @@ def _compare_eq_set(left, right, verbose=False):
diff_left = left - right
diff_right = right - left
if diff_left:
explanation.append(u("Extra items in the left set:"))
explanation.append(u"Extra items in the left set:")
for item in diff_left:
explanation.append(py.io.saferepr(item))
if diff_right:
explanation.append(u("Extra items in the right set:"))
explanation.append(u"Extra items in the right set:")
for item in diff_right:
explanation.append(py.io.saferepr(item))
return explanation
Expand All @@ -297,26 +289,26 @@ def _compare_eq_dict(left, right, verbose=False):
common = set(left).intersection(set(right))
same = {k: left[k] for k in common if left[k] == right[k]}
if same and verbose < 2:
explanation += [u("Omitting %s identical items, use -vv to show") % len(same)]
explanation += [u"Omitting %s identical items, use -vv to show" % len(same)]
elif same:
explanation += [u("Common items:")]
explanation += [u"Common items:"]
explanation += pprint.pformat(same).splitlines()
diff = {k for k in common if left[k] != right[k]}
if diff:
explanation += [u("Differing items:")]
explanation += [u"Differing items:"]
for k in diff:
explanation += [
py.io.saferepr({k: left[k]}) + " != " + py.io.saferepr({k: right[k]})
]
extra_left = set(left) - set(right)
if extra_left:
explanation.append(u("Left contains more items:"))
explanation.append(u"Left contains more items:")
explanation.extend(
pprint.pformat({k: left[k] for k in extra_left}).splitlines()
)
extra_right = set(right) - set(left)
if extra_right:
explanation.append(u("Right contains more items:"))
explanation.append(u"Right contains more items:")
explanation.extend(
pprint.pformat({k: right[k] for k in extra_right}).splitlines()
)
Expand All @@ -329,14 +321,14 @@ def _notin_text(term, text, verbose=False):
tail = text[index + len(term) :]
correct_text = head + tail
diff = _diff_text(correct_text, text, verbose)
newdiff = [u("%s is contained here:") % py.io.saferepr(term, maxsize=42)]
newdiff = [u"%s is contained here:" % py.io.saferepr(term, maxsize=42)]
for line in diff:
if line.startswith(u("Skipping")):
if line.startswith(u"Skipping"):
continue
if line.startswith(u("- ")):
if line.startswith(u"- "):
continue
if line.startswith(u("+ ")):
newdiff.append(u(" ") + line[2:])
if line.startswith(u"+ "):
newdiff.append(u" " + line[2:])
else:
newdiff.append(line)
return newdiff
4 changes: 2 additions & 2 deletions src/_pytest/capture.py
Original file line number Diff line number Diff line change
Expand Up @@ -504,7 +504,7 @@ class FDCaptureBinary(object):
snap() produces `bytes`
"""

EMPTY_BUFFER = bytes()
EMPTY_BUFFER = b""

def __init__(self, targetfd, tmpfile=None):
self.targetfd = targetfd
Expand Down Expand Up @@ -630,7 +630,7 @@ def writeorg(self, data):


class SysCaptureBinary(SysCapture):
EMPTY_BUFFER = bytes()
EMPTY_BUFFER = b""

def snap(self):
res = self.tmpfile.buffer.getvalue()
Expand Down
7 changes: 2 additions & 5 deletions testing/test_assertion.py
Original file line number Diff line number Diff line change
Expand Up @@ -539,11 +539,8 @@ def test_format_nonascii_explanation(self):

def test_mojibake(self):
# issue 429
left = "e"
right = "\xc3\xa9"
if not isinstance(left, bytes):
left = bytes(left, "utf-8")
right = bytes(right, "utf-8")
left = b"e"
right = b"\xc3\xa9"
expl = callequal(left, right)
for line in expl:
assert isinstance(line, six.text_type)
Expand Down