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Issue #13592: Improved the repr for regular expression pattern objects.

Browse source 
Based on patch by Hugo Lopes Tavares.
This commit is contained in:
Serhiy Storchaka 2013-11-23 22:42:43 +02:00
parent c1207c1bcf
commit 5c24d0e504
5 changed files with 150 additions and 1 deletions
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62
Lib/test/test_re.py
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@ -1164,6 +1164,68 @@ class ReTests(unittest.TestCase):
self.assertEqual(m.group(2), "y")
class PatternReprTests(unittest.TestCase):
def check(self, pattern, expected):
self.assertEqual(repr(re.compile(pattern)), expected)
def check_flags(self, pattern, flags, expected):
self.assertEqual(repr(re.compile(pattern, flags)), expected)
def test_without_flags(self):
self.check('random pattern',
"re.compile('random pattern')")
def test_single_flag(self):
self.check_flags('random pattern', re.IGNORECASE,
"re.compile('random pattern', re.IGNORECASE)")
def test_multiple_flags(self):
self.check_flags('random pattern', re.I|re.S|re.X,
"re.compile('random pattern', "
"re.IGNORECASE|re.DOTALL|re.VERBOSE)")
def test_unicode_flag(self):
self.check_flags('random pattern', re.U,
"re.compile('random pattern')")
self.check_flags('random pattern', re.I|re.S|re.U,
"re.compile('random pattern', "
"re.IGNORECASE|re.DOTALL)")
def test_inline_flags(self):
self.check('(?i)pattern',
"re.compile('(?i)pattern', re.IGNORECASE)")
def test_unknown_flags(self):
self.check_flags('random pattern', 0x123000,
"re.compile('random pattern', 0x123000)")
self.check_flags('random pattern', 0x123000|re.I,
"re.compile('random pattern', re.IGNORECASE|0x123000)")
def test_bytes(self):
self.check(b'bytes pattern',
"re.compile(b'bytes pattern')")
self.check_flags(b'bytes pattern', re.A,
"re.compile(b'bytes pattern', re.ASCII)")
def test_quotes(self):
self.check('random "double quoted" pattern',
'''re.compile('random "double quoted" pattern')''')
self.check("random 'single quoted' pattern",
'''re.compile("random 'single quoted' pattern")''')
self.check('''both 'single' and "double" quotes''',
'''re.compile('both \\'single\\' and "double" quotes')''')
def test_long_pattern(self):
pattern = 'Very %spattern' % ('long ' * 1000)
r = repr(re.compile(pattern))
self.assertLess(len(r), 300)
self.assertEqual(r[:30], "re.compile('Very long long lon")
r = repr(re.compile(pattern, re.I))
self.assertLess(len(r), 300)
self.assertEqual(r[:30], "re.compile('Very long long lon")
self.assertEqual(r[-16:], ", re.IGNORECASE)")
class ImplementationTest(unittest.TestCase):
"""
Test implementation details of the re module.