view tests/test-check-code.t @ 18820:a45e44d76c81

mercurial: implement diff and join for dicts

Given two dicts, diff returns a dict containing all the keys that are present
in one dict but not the other, or whose values are different between the
dicts. The values are pairs of the values from the dicts, with missing values
being represented as an optional argument, defaulting to None.

Given two dicts, join performs what is known as an outer join in relational
database land: it returns a dict containing all the keys across both dicts.
The values are pairs as above, except they aren't compared to see if they're
the same.

  $ cat > correct.py <<EOF
  > def toto(arg1, arg2):
  >     del arg2
  >     return (5 + 6, 9)
  > EOF
  $ cat > wrong.py <<EOF
  > def toto( arg1, arg2):
  >     del(arg2)
  >     return ( 5+6, 9)
  > EOF
  $ cat > quote.py <<EOF
  > # let's use quote in comments
  > (''' ( 4x5 )
  > but """\\''' and finally''',
  > """let's fool checkpatch""", '1+2',
  > '"""', 42+1, """and
  > ( 4-1 ) """, "( 1+1 )\" and ")
  > a, '\\\\\\\\', "\\\\\\" x-2", "c-1"
  > EOF
  $ cat > non-py24.py <<EOF
  > # Using builtins that does not exist in Python 2.4
  > if any():
  >     x = all()
  >     y = format(x)
  > 
  > # Do not complain about our own definition
  > def any(x):
  >     pass
  > 
  > # try/except/finally block does not exist in Python 2.4
  >     try:
  >         pass
  >     except StandardError, inst:
  >         pass
  >     finally:
  >         pass
  > 
  > # nested try/finally+try/except is allowed
  >     try:
  >         try:
  >             pass
  >         except StandardError, inst:
  >             pass
  >     finally:
  >         pass
  > 
  > # yield inside a try/finally block is not allowed in Python 2.4
  >     try:
  >         pass
  >         yield 1
  >     finally:
  >         pass
  >     try:
  >         yield
  >         pass
  >     finally:
  >         pass
  > 
  > EOF
  $ cat > classstyle.py <<EOF
  > class newstyle_class(object):
  >     pass
  > 
  > class oldstyle_class:
  >     pass
  > 
  > class empty():
  >     pass
  > 
  > no_class = 1:
  >     pass
  > EOF
  $ check_code="$TESTDIR"/../contrib/check-code.py
  $ "$check_code" ./wrong.py ./correct.py ./quote.py ./non-py24.py ./classstyle.py
  ./wrong.py:1:
   > def toto( arg1, arg2):
   gratuitous whitespace in () or []
  ./wrong.py:2:
   >     del(arg2)
   Python keyword is not a function
  ./wrong.py:3:
   >     return ( 5+6, 9)
   gratuitous whitespace in () or []
   missing whitespace in expression
  ./quote.py:5:
   > '"""', 42+1, """and
   missing whitespace in expression
  ./non-py24.py:2:
   > if any():
   any/all/format not available in Python 2.4
  ./non-py24.py:3:
   >     x = all()
   any/all/format not available in Python 2.4
  ./non-py24.py:4:
   >     y = format(x)
   any/all/format not available in Python 2.4
  ./non-py24.py:11:
   >     try:
   no try/except/finally in Python 2.4
  ./non-py24.py:28:
   >     try:
   no yield inside try/finally in Python 2.4
  ./non-py24.py:33:
   >     try:
   no yield inside try/finally in Python 2.4
  ./classstyle.py:4:
   > class oldstyle_class:
   old-style class, use class foo(object)
  ./classstyle.py:7:
   > class empty():
   class foo() not available in Python 2.4, use class foo(object)
  [1]
  $ cat > python3-compat.py << EOF
  > foo <> bar
  > reduce(lambda a, b: a + b, [1, 2, 3, 4])
  > EOF
  $ "$check_code" python3-compat.py
  python3-compat.py:1:
   > foo <> bar
   <> operator is not available in Python 3+, use !=
  python3-compat.py:2:
   > reduce(lambda a, b: a + b, [1, 2, 3, 4])
   reduce is not available in Python 3+
  [1]

  $ cat > is-op.py <<EOF
  > # is-operator comparing number or string literal
  > x = None
  > y = x is 'foo'
  > y = x is "foo"
  > y = x is 5346
  > y = x is -6
  > y = x is not 'foo'
  > y = x is not "foo"
  > y = x is not 5346
  > y = x is not -6
  > EOF

  $ "$check_code" ./is-op.py
  ./is-op.py:3:
   > y = x is 'foo'
   object comparison with literal
  ./is-op.py:4:
   > y = x is "foo"
   object comparison with literal
  ./is-op.py:5:
   > y = x is 5346
   object comparison with literal
  ./is-op.py:6:
   > y = x is -6
   object comparison with literal
  ./is-op.py:7:
   > y = x is not 'foo'
   object comparison with literal
  ./is-op.py:8:
   > y = x is not "foo"
   object comparison with literal
  ./is-op.py:9:
   > y = x is not 5346
   object comparison with literal
  ./is-op.py:10:
   > y = x is not -6
   object comparison with literal
  [1]

  $ cat > for-nolineno.py <<EOF
  > except:
  > EOF
  $ "$check_code" for-nolineno.py --nolineno
  for-nolineno.py:0:
   > except:
   naked except clause
  [1]

  $ cat > raise-format.py <<EOF
  > raise SomeException, message
  > # this next line is okay
  > raise SomeException(arg1, arg2)
  > EOF
  $ "$check_code" raise-format.py
  raise-format.py:1:
   > raise SomeException, message
   don't use old-style two-argument raise, use Exception(message)
  [1]