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gh-94816: Improve coverage of decode_linetable #94853

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merged 4 commits into from
Jul 14, 2022
Merged

gh-94816: Improve coverage of decode_linetable #94853

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751bacf
gh-94816: Improve coverage of decode_linetable
mdboom Jul 14, 2022
5e8ec42
Make work without default encoding
mdboom Jul 14, 2022
7857e50
Use `list` rather than `repr`. Use blank lines rather than docstring.
mdboom Jul 14, 2022
c77f49d
Update Lib/test/test_code.py
mdboom Jul 14, 2022
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23 changes: 23 additions & 0 deletions Lib/test/test_code.py
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@
freevars: ()
nlocals: 2
flags: 3
lnotab: [4, 1, 10, 2]
consts: ('None', '<code object g>')

>>> dump(f(4).__code__)
Expand All @@ -30,6 +31,7 @@
freevars: ('x',)
nlocals: 1
flags: 19
lnotab: [4, 1]
consts: ('None',)

>>> def h(x, y):
Expand All @@ -50,6 +52,7 @@
freevars: ()
nlocals: 5
flags: 3
lnotab: [2, 1, 10, 1, 10, 1, 10, 1]
consts: ('None',)

>>> def attrs(obj):
Expand All @@ -68,6 +71,7 @@
freevars: ()
nlocals: 1
flags: 3
lnotab: [2, 1, 46, 1, 46, 1]
consts: ('None',)

>>> def optimize_away():
Expand All @@ -87,6 +91,7 @@
freevars: ()
nlocals: 0
flags: 3
lnotab: [2, 2, 2, 1, 2, 1]
consts: ("'doc string'", 'None')

>>> def keywordonly_args(a,b,*,k1):
Expand All @@ -104,6 +109,7 @@
freevars: ()
nlocals: 3
flags: 3
lnotab: [2, 1]
consts: ('None',)

>>> def posonly_args(a,b,/,c):
Expand All @@ -121,6 +127,7 @@
freevars: ()
nlocals: 3
flags: 3
lnotab: [2, 1]
consts: ('None',)

"""
Expand Down Expand Up @@ -161,6 +168,7 @@ def dump(co):
"kwonlyargcount", "names", "varnames",
"cellvars", "freevars", "nlocals", "flags"]:
print("%s: %s" % (attr, getattr(co, "co_" + attr)))
print("lnotab:", list(co.co_lnotab))
print("consts:", tuple(consts(co.co_consts)))

# Needed for test_closure_injection below
Expand Down Expand Up @@ -428,6 +436,21 @@ def func():
self.assertIsNone(line)
self.assertEqual(end_line, new_code.co_firstlineno + 1)

def test_large_lnotab(self):
d = {}
lines = (
["def f():"] +
[""] * (1 << 17) +
[" pass"] * (1 << 17)
)
source = "\n".join(lines)
exec(source, d)
code = d["f"].__code__

expected = 1032 * [0, 127] + [0, 9] + ((1 << 17) - 1) * [2, 1]
expected[0] = 2
self.assertEqual(list(code.co_lnotab), expected)


def isinterned(s):
return s is sys.intern(('_' + s + '_')[1:-1])
Expand Down