def test_startswith_exhaustive(ending):
# Exhaustive test of the various combinations. Should catch most
# edge conditions.
for base in ("A" + ending, "A" + ending + "BA" + ending):
for repeat in range(0, 15):
s = base * repeat
infile = StringIO(s)
#for marker in ("A", "A\n"): # Don't use; bug when using "\n"
for marker in ("A", ):
for look in range(5):
lookahead = base * look
for readhint in range(4, 10):
infile.seek(0)
reader = RecordReader.StartsWith(\
infile, marker, readhint, lookahead)
count = count_records(reader)
assert count == repeat + look, \
(count, ending, base, repeat, marker,
look, readhint)
infile.seek(0)
reader = RecordReader.StartsWith(infile,
marker,
lookahead=lookahead)
count = count_records(reader)
assert count == repeat + look, \
(count, ending, repeat, marker, look)
def test_startswith_SP():
# Check using a SWISS-PROT-like format
for ending in ("\n", "\r", "\r\n"):
s = string.replace(data1, "\n", ending)
for final in ("", ending):
d = s + final
for i in range(5, 20):
infile = StringIO(d)
reader = RecordReader.StartsWith(infile, "ID", i)
count = count_records(reader)
assert count == 3, (ending, final, i, count, d)
for i in range(6, 20):
infile = StringIO(d)
reader = RecordReader.StartsWith(infile, "ID ", i)
count = count_records(reader)
assert count == 3, (ending, final, i, count, d)
def __init__(self, handle, parser=None):
"""Initialize the iterator.
Arguments:
o handle - A handle with NBRF entries to iterate through.
o parser - An optional parser to pass the entries through before
returning them. If None, then the raw entry will be returned.
"""
self.handle = File.UndoHandle(handle)
self._reader = RecordReader.StartsWith(self.handle, ">")
self._parser = parser
def __init__(self, handle, parser = None):
"""Initialize the iterator.
Arguments:
o handle - A handle with Kabat entries to iterate through.
o parser - An optional parser to pass the entries through before
returning them. If None, then the raw entry will be returned.
"""
self._reader = RecordReader.StartsWith(handle, "METATOOL")
# self._reader = RecordReader.EndsWith(handle, "RECEND|\n")
self._parser = parser
def test_fasta():
s = """\
>seq1
SEQUENCE
>seq2
MULTI
LINE
SEQUENCE
>seq3
>seq4
"""
reader = RecordReader.StartsWith(StringIO(s), ">")
assert test_count(reader) == 4
reader = RecordReader.StartsWith(StringIO(""), ">")
assert test_count(reader) == 0
reader = RecordReader.StartsWith(StringIO(">seq\n"), ">")
assert test_count(reader) == 1
def test_startswith_generic():
to_eol_data = (
("A\n", 1),
("AA\n", 1),
("A\nB\n", 1),
("A\nB\nB\n", 1),
("A\nB\nB\nA\n", 2),
("A\nA\nB\nA\n", 3),
("A\n A\nA\n", 2),
("A A A A A A A A A A A A A A\nB\nA\n", 2),
)
for s, expected in to_eol_data:
reader = RecordReader.StartsWith(StringIO(s), "A")
count = count_records(reader)
assert count == expected, (s, expected, count) # skips to EOL
def test_startswith_errors():
# Check the failure cases. Actually, there's only one.
# Doesn't start with A
for s in ("B", "B\n", " A\n", " A", "B\nA\n"):
try:
infile = StringIO(s)
# The current implementation will fail here, but the
# interface spec allows the error to be unreported
# until reading the record.
reader = RecordReader.StartsWith(infile, "A")
rec = reader.next()
raise AssertionError, "should not allow %r" % s
except RecordReader.ReaderError:
pass
else:
raise AssertionError, "should not get here"
def test_startswith_remainder():
# Make sure the remainder method works
for repeat in range(20):
vals = map(lambda x: "A\n%d\n" % x, range(repeat))
data = string.join(vals, "")
infile = StringIO(data)
for look in range(10) + range(10, len(data), 5):
infile.seek(look)
lookahead = data[:look]
reader = RecordReader.StartsWith(infile, "A", lookahead=lookahead)
all = ""
while 1:
file, lh = reader.remainder()
pos = file.tell()
rest = file.read()
assert all + lh + rest == data, (all, lh, rest, data)
file.seek(pos)
assert data.startswith(all), (data, all)
record = reader.next()
if record is None:
break
all = all + record
assert all == data, (all, data)
def test_start_lines():
lookahead = open(sp_sample).read()
reader = RecordReader.StartsWith(StringIO(""), "ID", lookahead = lookahead)
assert test_count(reader) == 8
def test_start():
reader = RecordReader.StartsWith(open(sp_sample), "ID")
assert test_count(reader, 0) == 8
