test-manifest: create constant for empty manifest

For symmetry with manifest v2, once we add that, let's extract a
constant for the empty v1 manifest.

tests/test-manifest.py

@@ -1,389 +1,391 b''
 import binascii
 import unittest
 import itertools
 
 import silenttestrunner
 
 from mercurial import manifest as manifestmod
 from mercurial import match as matchmod
 
+EMTPY_MANIFEST = ''
+
 HASH_1 = '1' * 40
 HASH_2 = 'f' * 40
 HASH_3 = '1234567890abcdef0987654321deadbeef0fcafe'
 A_SHORT_MANIFEST = (
     'bar/baz/qux.py\0%(hash2)s%(flag2)s\n'
     'foo\0%(hash1)s%(flag1)s\n'
     ) % {'hash1': HASH_1,
          'flag1': '',
          'hash2': HASH_2,
          'flag2': 'l',
          }
 
 A_DEEPER_MANIFEST = (
     'a/b/c/bar.py\0%(hash3)s%(flag1)s\n'
     'a/b/c/bar.txt\0%(hash1)s%(flag1)s\n'
     'a/b/c/foo.py\0%(hash3)s%(flag1)s\n'
     'a/b/c/foo.txt\0%(hash2)s%(flag2)s\n'
     'a/b/d/baz.py\0%(hash3)s%(flag1)s\n'
     'a/b/d/qux.py\0%(hash1)s%(flag2)s\n'
     'a/b/d/ten.txt\0%(hash3)s%(flag2)s\n'
     'a/b/dog.py\0%(hash3)s%(flag1)s\n'
     'a/b/fish.py\0%(hash2)s%(flag1)s\n'
     'a/c/london.py\0%(hash3)s%(flag2)s\n'
     'a/c/paper.txt\0%(hash2)s%(flag2)s\n'
     'a/c/paris.py\0%(hash2)s%(flag1)s\n'
     'a/d/apple.py\0%(hash3)s%(flag1)s\n'
     'a/d/pizza.py\0%(hash3)s%(flag2)s\n'
     'a/green.py\0%(hash1)s%(flag2)s\n'
     'a/purple.py\0%(hash2)s%(flag1)s\n'
     'app.py\0%(hash3)s%(flag1)s\n'
     'readme.txt\0%(hash2)s%(flag1)s\n'
     ) % {'hash1': HASH_1,
          'flag1': '',
          'hash2': HASH_2,
          'flag2': 'l',
          'hash3': HASH_3,
          }
 
 HUGE_MANIFEST_ENTRIES = 200001
 
 A_HUGE_MANIFEST = ''.join(sorted(
     'file%d\0%s%s\n' % (i, h, f) for i, h, f in
     itertools.izip(xrange(200001),
                    itertools.cycle((HASH_1, HASH_2)),
                    itertools.cycle(('', 'x', 'l')))))
 
 def parsemanifest(text):
     return manifestmod.manifestdict(text)
 
 class testmanifest(unittest.TestCase):
 
     def assertIn(self, thing, container, msg=None):
         # assertIn new in 2.7, use it if available, otherwise polyfill
         sup = getattr(unittest.TestCase, 'assertIn', False)
         if sup:
             return sup(self, thing, container, msg=msg)
         if not msg:
             msg = 'Expected %r in %r' % (thing, container)
         self.assert_(thing in container, msg)
 
     def testEmptyManifest(self):
-        m = parsemanifest('')
+        m = parsemanifest(EMTPY_MANIFEST)
         self.assertEqual(0, len(m))
         self.assertEqual([], list(m))
 
     def testManifest(self):
         m = parsemanifest(A_SHORT_MANIFEST)
         self.assertEqual(['bar/baz/qux.py', 'foo'], list(m))
         self.assertEqual(binascii.unhexlify(HASH_2), m['bar/baz/qux.py'])
         self.assertEqual('l', m.flags('bar/baz/qux.py'))
         self.assertEqual(binascii.unhexlify(HASH_1), m['foo'])
         self.assertEqual('', m.flags('foo'))
         self.assertRaises(KeyError, lambda : m['wat'])
 
     def testSetItem(self):
         want = binascii.unhexlify(HASH_1)
 
-        m = parsemanifest('')
+        m = parsemanifest(EMTPY_MANIFEST)
         m['a'] = want
         self.assertIn('a', m)
         self.assertEqual(want, m['a'])
         self.assertEqual('a\0' + HASH_1 + '\n', m.text())
 
         m = parsemanifest(A_SHORT_MANIFEST)
         m['a'] = want
         self.assertEqual(want, m['a'])
         self.assertEqual('a\0' + HASH_1 + '\n' + A_SHORT_MANIFEST,
                          m.text())
 
     def testSetFlag(self):
         want = 'x'
 
-        m = parsemanifest('')
+        m = parsemanifest(EMTPY_MANIFEST)
         # first add a file; a file-less flag makes no sense
         m['a'] = binascii.unhexlify(HASH_1)
         m.setflag('a', want)
         self.assertEqual(want, m.flags('a'))
         self.assertEqual('a\0' + HASH_1 + want + '\n', m.text())
 
         m = parsemanifest(A_SHORT_MANIFEST)
         # first add a file; a file-less flag makes no sense
         m['a'] = binascii.unhexlify(HASH_1)
         m.setflag('a', want)
         self.assertEqual(want, m.flags('a'))
         self.assertEqual('a\0' + HASH_1 + want + '\n' + A_SHORT_MANIFEST,
                          m.text())
 
     def testCopy(self):
         m = parsemanifest(A_SHORT_MANIFEST)
         m['a'] =  binascii.unhexlify(HASH_1)
         m2 = m.copy()
         del m
         del m2 # make sure we don't double free() anything
 
     def testCompaction(self):
         unhex = binascii.unhexlify
         h1, h2 = unhex(HASH_1), unhex(HASH_2)
         m = parsemanifest(A_SHORT_MANIFEST)
         m['alpha'] = h1
         m['beta'] = h2
         del m['foo']
         want = 'alpha\0%s\nbar/baz/qux.py\0%sl\nbeta\0%s\n' % (
             HASH_1, HASH_2, HASH_2)
         self.assertEqual(want, m.text())
         self.assertEqual(3, len(m))
         self.assertEqual(['alpha', 'bar/baz/qux.py', 'beta'], list(m))
         self.assertEqual(h1, m['alpha'])
         self.assertEqual(h2, m['bar/baz/qux.py'])
         self.assertEqual(h2, m['beta'])
         self.assertEqual('', m.flags('alpha'))
         self.assertEqual('l', m.flags('bar/baz/qux.py'))
         self.assertEqual('', m.flags('beta'))
         self.assertRaises(KeyError, lambda : m['foo'])
 
     def testSetGetNodeSuffix(self):
         clean = parsemanifest(A_SHORT_MANIFEST)
         m = parsemanifest(A_SHORT_MANIFEST)
         h = m['foo']
         f = m.flags('foo')
         want = h + 'a'
         # Merge code wants to set 21-byte fake hashes at times
         m['foo'] = want
         self.assertEqual(want, m['foo'])
         self.assertEqual([('bar/baz/qux.py', binascii.unhexlify(HASH_2)),
                           ('foo', binascii.unhexlify(HASH_1) + 'a')],
                          list(m.iteritems()))
         # Sometimes it even tries a 22-byte fake hash, but we can
         # return 21 and it'll work out
         m['foo'] = want + '+'
         self.assertEqual(want, m['foo'])
         # make sure the suffix survives a copy
         match = matchmod.match('', '', ['re:foo'])
         m2 = m.matches(match)
         self.assertEqual(want, m2['foo'])
         self.assertEqual(1, len(m2))
         m2 = m.copy()
         self.assertEqual(want, m2['foo'])
         # suffix with iteration
         self.assertEqual([('bar/baz/qux.py', binascii.unhexlify(HASH_2)),
                           ('foo', want)],
                          list(m.iteritems()))
 
         # shows up in diff
         self.assertEqual({'foo': ((want, f), (h, ''))}, m.diff(clean))
         self.assertEqual({'foo': ((h, ''), (want, f))}, clean.diff(m))
 
     def testMatchException(self):
         m = parsemanifest(A_SHORT_MANIFEST)
         match = matchmod.match('', '', ['re:.*'])
         def filt(path):
             if path == 'foo':
                 assert False
             return True
         match.matchfn = filt
         self.assertRaises(AssertionError, m.matches, match)
 
     def testRemoveItem(self):
         m = parsemanifest(A_SHORT_MANIFEST)
         del m['foo']
         self.assertRaises(KeyError, lambda : m['foo'])
         self.assertEqual(1, len(m))
         self.assertEqual(1, len(list(m)))
         # now restore and make sure everything works right
         m['foo'] = 'a' * 20
         self.assertEqual(2, len(m))
         self.assertEqual(2, len(list(m)))
 
     def testManifestDiff(self):
         MISSING = (None, '')
         addl = 'z-only-in-left\0' + HASH_1 + '\n'
         addr = 'z-only-in-right\0' + HASH_2 + 'x\n'
         left = parsemanifest(
             A_SHORT_MANIFEST.replace(HASH_1, HASH_3 + 'x') + addl)
         right = parsemanifest(A_SHORT_MANIFEST + addr)
         want = {
             'foo': ((binascii.unhexlify(HASH_3), 'x'),
                     (binascii.unhexlify(HASH_1), '')),
             'z-only-in-left': ((binascii.unhexlify(HASH_1), ''), MISSING),
             'z-only-in-right': (MISSING, (binascii.unhexlify(HASH_2), 'x')),
             }
         self.assertEqual(want, left.diff(right))
 
         want = {
             'bar/baz/qux.py': (MISSING, (binascii.unhexlify(HASH_2), 'l')),
             'foo': (MISSING, (binascii.unhexlify(HASH_3), 'x')),
             'z-only-in-left': (MISSING, (binascii.unhexlify(HASH_1), '')),
             }
-        self.assertEqual(want, parsemanifest('').diff(left))
+        self.assertEqual(want, parsemanifest(EMTPY_MANIFEST).diff(left))
 
         want = {
             'bar/baz/qux.py': ((binascii.unhexlify(HASH_2), 'l'), MISSING),
             'foo': ((binascii.unhexlify(HASH_3), 'x'), MISSING),
             'z-only-in-left': ((binascii.unhexlify(HASH_1), ''), MISSING),
             }
-        self.assertEqual(want, left.diff(parsemanifest('')))
+        self.assertEqual(want, left.diff(parsemanifest(EMTPY_MANIFEST)))
         copy = right.copy()
         del copy['z-only-in-right']
         del right['foo']
         want = {
             'foo': (MISSING, (binascii.unhexlify(HASH_1), '')),
             'z-only-in-right': ((binascii.unhexlify(HASH_2), 'x'), MISSING),
             }
         self.assertEqual(want, right.diff(copy))
 
         short = parsemanifest(A_SHORT_MANIFEST)
         pruned = short.copy()
         del pruned['foo']
         want = {
             'foo': ((binascii.unhexlify(HASH_1), ''), MISSING),
             }
         self.assertEqual(want, short.diff(pruned))
         want = {
             'foo': (MISSING, (binascii.unhexlify(HASH_1), '')),
             }
         self.assertEqual(want, pruned.diff(short))
         want = {
             'bar/baz/qux.py': None,
             'foo': (MISSING, (binascii.unhexlify(HASH_1), '')),
             }
         self.assertEqual(want, pruned.diff(short, True))
 
     def testReversedLines(self):
         backwards = ''.join(
             l + '\n' for l in reversed(A_SHORT_MANIFEST.split('\n')) if l)
         try:
             parsemanifest(backwards)
             self.fail('Should have raised ValueError')
         except ValueError, v:
             self.assertIn('Manifest lines not in sorted order.', str(v))
 
     def testNoTerminalNewline(self):
         try:
             parsemanifest(A_SHORT_MANIFEST + 'wat')
             self.fail('Should have raised ValueError')
         except ValueError, v:
             self.assertIn('Manifest did not end in a newline.', str(v))
 
     def testNoNewLineAtAll(self):
         try:
             parsemanifest('wat')
             self.fail('Should have raised ValueError')
         except ValueError, v:
             self.assertIn('Manifest did not end in a newline.', str(v))
 
     def testHugeManifest(self):
         m = parsemanifest(A_HUGE_MANIFEST)
         self.assertEqual(HUGE_MANIFEST_ENTRIES, len(m))
         self.assertEqual(len(m), len(list(m)))
 
     def testMatchesMetadata(self):
         '''Tests matches() for a few specific files to make sure that both
         the set of files as well as their flags and nodeids are correct in
         the resulting manifest.'''
         m = parsemanifest(A_HUGE_MANIFEST)
 
         match = matchmod.match('/', '',
                 ['file1', 'file200', 'file300'], exact=True)
         m2 = m.matches(match)
 
         w = ('file1\0%sx\n'
              'file200\0%sl\n'
              'file300\0%s\n') % (HASH_2, HASH_1, HASH_1)
         self.assertEqual(w, m2.text())
 
     def testMatchesNonexistentFile(self):
         '''Tests matches() for a small set of specific files, including one
         nonexistent file to make sure in only matches against existing files.
         '''
         m = parsemanifest(A_DEEPER_MANIFEST)
 
         match = matchmod.match('/', '',
                 ['a/b/c/bar.txt', 'a/b/d/qux.py', 'readme.txt', 'nonexistent'],
                 exact=True)
         m2 = m.matches(match)
 
         self.assertEqual(
                 ['a/b/c/bar.txt', 'a/b/d/qux.py', 'readme.txt'],
                 m2.keys())
 
     def testMatchesNonexistentDirectory(self):
         '''Tests matches() for a relpath match on a directory that doesn't
         actually exist.'''
         m = parsemanifest(A_DEEPER_MANIFEST)
 
         match = matchmod.match('/', '', ['a/f'], default='relpath')
         m2 = m.matches(match)
 
         self.assertEqual([], m2.keys())
 
     def testMatchesExactLarge(self):
         '''Tests matches() for files matching a large list of exact files.
         '''
         m = parsemanifest(A_HUGE_MANIFEST)
 
         flist = m.keys()[80:300]
         match = matchmod.match('/', '', flist, exact=True)
         m2 = m.matches(match)
 
         self.assertEqual(flist, m2.keys())
 
     def testMatchesFull(self):
         '''Tests matches() for what should be a full match.'''
         m = parsemanifest(A_DEEPER_MANIFEST)
 
         match = matchmod.match('/', '', [''])
         m2 = m.matches(match)
 
         self.assertEqual(m.keys(), m2.keys())
 
     def testMatchesDirectory(self):
         '''Tests matches() on a relpath match on a directory, which should
         match against all files within said directory.'''
         m = parsemanifest(A_DEEPER_MANIFEST)
 
         match = matchmod.match('/', '', ['a/b'], default='relpath')
         m2 = m.matches(match)
 
         self.assertEqual([
             'a/b/c/bar.py', 'a/b/c/bar.txt', 'a/b/c/foo.py', 'a/b/c/foo.txt',
             'a/b/d/baz.py', 'a/b/d/qux.py', 'a/b/d/ten.txt', 'a/b/dog.py',
             'a/b/fish.py'], m2.keys())
 
     def testMatchesExactPath(self):
         '''Tests matches() on an exact match on a directory, which should
         result in an empty manifest because you can't perform an exact match
         against a directory.'''
         m = parsemanifest(A_DEEPER_MANIFEST)
 
         match = matchmod.match('/', '', ['a/b'], exact=True)
         m2 = m.matches(match)
 
         self.assertEqual([], m2.keys())
 
     def testMatchesCwd(self):
         '''Tests matches() on a relpath match with the current directory ('.')
         when not in the root directory.'''
         m = parsemanifest(A_DEEPER_MANIFEST)
 
         match = matchmod.match('/', 'a/b', ['.'], default='relpath')
         m2 = m.matches(match)
 
         self.assertEqual([
             'a/b/c/bar.py', 'a/b/c/bar.txt', 'a/b/c/foo.py', 'a/b/c/foo.txt',
             'a/b/d/baz.py', 'a/b/d/qux.py', 'a/b/d/ten.txt', 'a/b/dog.py',
             'a/b/fish.py'], m2.keys())
 
     def testMatchesWithPattern(self):
         '''Tests matches() for files matching a pattern that reside
         deeper than the specified directory.'''
         m = parsemanifest(A_DEEPER_MANIFEST)
 
         match = matchmod.match('/', '', ['a/b/*/*.txt'])
         m2 = m.matches(match)
 
         self.assertEqual(
                 ['a/b/c/bar.txt', 'a/b/c/foo.txt', 'a/b/d/ten.txt'],
                 m2.keys())
 
 if __name__ == '__main__':
     silenttestrunner.main(__name__)