857 lines
32 KiB
Python
857 lines
32 KiB
Python
'''
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Tests for fileinput module.
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Nick Mathewson
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'''
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import os
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import sys
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import re
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import fileinput
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import collections
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import builtins
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import unittest
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try:
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import bz2
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except ImportError:
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bz2 = None
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try:
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import gzip
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except ImportError:
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gzip = None
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from io import StringIO
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from fileinput import FileInput, hook_encoded
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from test.support import verbose, TESTFN, run_unittest
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from test.support import unlink as safe_unlink
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# The fileinput module has 2 interfaces: the FileInput class which does
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# all the work, and a few functions (input, etc.) that use a global _state
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# variable.
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# Write lines (a list of lines) to temp file number i, and return the
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# temp file's name.
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def writeTmp(i, lines, mode='w'): # opening in text mode is the default
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name = TESTFN + str(i)
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f = open(name, mode)
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for line in lines:
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f.write(line)
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f.close()
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return name
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def remove_tempfiles(*names):
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for name in names:
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if name:
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safe_unlink(name)
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class BufferSizesTests(unittest.TestCase):
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def test_buffer_sizes(self):
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# First, run the tests with default and teeny buffer size.
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for round, bs in (0, 0), (1, 30):
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t1 = t2 = t3 = t4 = None
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try:
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t1 = writeTmp(1, ["Line %s of file 1\n" % (i+1) for i in range(15)])
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t2 = writeTmp(2, ["Line %s of file 2\n" % (i+1) for i in range(10)])
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t3 = writeTmp(3, ["Line %s of file 3\n" % (i+1) for i in range(5)])
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t4 = writeTmp(4, ["Line %s of file 4\n" % (i+1) for i in range(1)])
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self.buffer_size_test(t1, t2, t3, t4, bs, round)
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finally:
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remove_tempfiles(t1, t2, t3, t4)
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def buffer_size_test(self, t1, t2, t3, t4, bs=0, round=0):
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pat = re.compile(r'LINE (\d+) OF FILE (\d+)')
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start = 1 + round*6
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if verbose:
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print('%s. Simple iteration (bs=%s)' % (start+0, bs))
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fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
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lines = list(fi)
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fi.close()
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self.assertEqual(len(lines), 31)
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self.assertEqual(lines[4], 'Line 5 of file 1\n')
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self.assertEqual(lines[30], 'Line 1 of file 4\n')
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self.assertEqual(fi.lineno(), 31)
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self.assertEqual(fi.filename(), t4)
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if verbose:
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print('%s. Status variables (bs=%s)' % (start+1, bs))
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fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
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s = "x"
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while s and s != 'Line 6 of file 2\n':
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s = fi.readline()
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self.assertEqual(fi.filename(), t2)
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self.assertEqual(fi.lineno(), 21)
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self.assertEqual(fi.filelineno(), 6)
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self.assertFalse(fi.isfirstline())
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self.assertFalse(fi.isstdin())
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if verbose:
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print('%s. Nextfile (bs=%s)' % (start+2, bs))
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fi.nextfile()
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self.assertEqual(fi.readline(), 'Line 1 of file 3\n')
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self.assertEqual(fi.lineno(), 22)
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fi.close()
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if verbose:
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print('%s. Stdin (bs=%s)' % (start+3, bs))
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fi = FileInput(files=(t1, t2, t3, t4, '-'), bufsize=bs)
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savestdin = sys.stdin
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try:
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sys.stdin = StringIO("Line 1 of stdin\nLine 2 of stdin\n")
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lines = list(fi)
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self.assertEqual(len(lines), 33)
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self.assertEqual(lines[32], 'Line 2 of stdin\n')
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self.assertEqual(fi.filename(), '<stdin>')
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fi.nextfile()
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finally:
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sys.stdin = savestdin
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if verbose:
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print('%s. Boundary conditions (bs=%s)' % (start+4, bs))
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fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
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self.assertEqual(fi.lineno(), 0)
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self.assertEqual(fi.filename(), None)
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fi.nextfile()
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self.assertEqual(fi.lineno(), 0)
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self.assertEqual(fi.filename(), None)
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if verbose:
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print('%s. Inplace (bs=%s)' % (start+5, bs))
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savestdout = sys.stdout
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try:
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fi = FileInput(files=(t1, t2, t3, t4), inplace=1, bufsize=bs)
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for line in fi:
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line = line[:-1].upper()
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print(line)
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fi.close()
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finally:
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sys.stdout = savestdout
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fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
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for line in fi:
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self.assertEqual(line[-1], '\n')
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m = pat.match(line[:-1])
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self.assertNotEqual(m, None)
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self.assertEqual(int(m.group(1)), fi.filelineno())
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fi.close()
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class UnconditionallyRaise:
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def __init__(self, exception_type):
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self.exception_type = exception_type
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self.invoked = False
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def __call__(self, *args, **kwargs):
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self.invoked = True
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raise self.exception_type()
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class FileInputTests(unittest.TestCase):
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def test_zero_byte_files(self):
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t1 = t2 = t3 = t4 = None
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try:
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t1 = writeTmp(1, [""])
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t2 = writeTmp(2, [""])
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t3 = writeTmp(3, ["The only line there is.\n"])
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t4 = writeTmp(4, [""])
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fi = FileInput(files=(t1, t2, t3, t4))
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line = fi.readline()
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self.assertEqual(line, 'The only line there is.\n')
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self.assertEqual(fi.lineno(), 1)
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self.assertEqual(fi.filelineno(), 1)
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self.assertEqual(fi.filename(), t3)
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line = fi.readline()
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self.assertFalse(line)
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self.assertEqual(fi.lineno(), 1)
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self.assertEqual(fi.filelineno(), 0)
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self.assertEqual(fi.filename(), t4)
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fi.close()
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finally:
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remove_tempfiles(t1, t2, t3, t4)
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def test_files_that_dont_end_with_newline(self):
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t1 = t2 = None
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try:
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t1 = writeTmp(1, ["A\nB\nC"])
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t2 = writeTmp(2, ["D\nE\nF"])
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fi = FileInput(files=(t1, t2))
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lines = list(fi)
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self.assertEqual(lines, ["A\n", "B\n", "C", "D\n", "E\n", "F"])
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self.assertEqual(fi.filelineno(), 3)
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self.assertEqual(fi.lineno(), 6)
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finally:
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remove_tempfiles(t1, t2)
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## def test_unicode_filenames(self):
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## # XXX A unicode string is always returned by writeTmp.
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## # So is this needed?
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## try:
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## t1 = writeTmp(1, ["A\nB"])
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## encoding = sys.getfilesystemencoding()
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## if encoding is None:
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## encoding = 'ascii'
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## fi = FileInput(files=str(t1, encoding))
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## lines = list(fi)
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## self.assertEqual(lines, ["A\n", "B"])
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## finally:
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## remove_tempfiles(t1)
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def test_fileno(self):
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t1 = t2 = None
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try:
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t1 = writeTmp(1, ["A\nB"])
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t2 = writeTmp(2, ["C\nD"])
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fi = FileInput(files=(t1, t2))
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self.assertEqual(fi.fileno(), -1)
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line =next( fi)
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self.assertNotEqual(fi.fileno(), -1)
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fi.nextfile()
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self.assertEqual(fi.fileno(), -1)
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line = list(fi)
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self.assertEqual(fi.fileno(), -1)
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finally:
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remove_tempfiles(t1, t2)
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def test_opening_mode(self):
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try:
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# invalid mode, should raise ValueError
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fi = FileInput(mode="w")
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self.fail("FileInput should reject invalid mode argument")
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except ValueError:
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pass
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t1 = None
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try:
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# try opening in universal newline mode
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t1 = writeTmp(1, [b"A\nB\r\nC\rD"], mode="wb")
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fi = FileInput(files=t1, mode="U")
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lines = list(fi)
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self.assertEqual(lines, ["A\n", "B\n", "C\n", "D"])
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finally:
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remove_tempfiles(t1)
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def test_file_opening_hook(self):
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try:
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# cannot use openhook and inplace mode
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fi = FileInput(inplace=1, openhook=lambda f, m: None)
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self.fail("FileInput should raise if both inplace "
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"and openhook arguments are given")
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except ValueError:
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pass
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try:
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fi = FileInput(openhook=1)
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self.fail("FileInput should check openhook for being callable")
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except ValueError:
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pass
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class CustomOpenHook:
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def __init__(self):
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self.invoked = False
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def __call__(self, *args):
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self.invoked = True
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return open(*args)
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t = writeTmp(1, ["\n"])
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self.addCleanup(remove_tempfiles, t)
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custom_open_hook = CustomOpenHook()
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with FileInput([t], openhook=custom_open_hook) as fi:
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fi.readline()
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self.assertTrue(custom_open_hook.invoked, "openhook not invoked")
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def test_context_manager(self):
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try:
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t1 = writeTmp(1, ["A\nB\nC"])
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t2 = writeTmp(2, ["D\nE\nF"])
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with FileInput(files=(t1, t2)) as fi:
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lines = list(fi)
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self.assertEqual(lines, ["A\n", "B\n", "C", "D\n", "E\n", "F"])
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self.assertEqual(fi.filelineno(), 3)
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self.assertEqual(fi.lineno(), 6)
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self.assertEqual(fi._files, ())
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finally:
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remove_tempfiles(t1, t2)
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def test_close_on_exception(self):
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try:
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t1 = writeTmp(1, [""])
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with FileInput(files=t1) as fi:
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raise IOError
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except IOError:
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self.assertEqual(fi._files, ())
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finally:
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remove_tempfiles(t1)
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def test_empty_files_list_specified_to_constructor(self):
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with FileInput(files=[]) as fi:
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self.assertEqual(fi._files, ('-',))
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def test__getitem__(self):
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"""Tests invoking FileInput.__getitem__() with the current
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line number"""
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t = writeTmp(1, ["line1\n", "line2\n"])
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self.addCleanup(remove_tempfiles, t)
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with FileInput(files=[t]) as fi:
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retval1 = fi[0]
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self.assertEqual(retval1, "line1\n")
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retval2 = fi[1]
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self.assertEqual(retval2, "line2\n")
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def test__getitem__invalid_key(self):
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"""Tests invoking FileInput.__getitem__() with an index unequal to
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the line number"""
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t = writeTmp(1, ["line1\n", "line2\n"])
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self.addCleanup(remove_tempfiles, t)
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with FileInput(files=[t]) as fi:
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with self.assertRaises(RuntimeError) as cm:
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fi[1]
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self.assertEqual(cm.exception.args, ("accessing lines out of order",))
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def test__getitem__eof(self):
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"""Tests invoking FileInput.__getitem__() with the line number but at
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end-of-input"""
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t = writeTmp(1, [])
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self.addCleanup(remove_tempfiles, t)
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with FileInput(files=[t]) as fi:
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with self.assertRaises(IndexError) as cm:
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fi[0]
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self.assertEqual(cm.exception.args, ("end of input reached",))
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def test_nextfile_oserror_deleting_backup(self):
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"""Tests invoking FileInput.nextfile() when the attempt to delete
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the backup file would raise OSError. This error is expected to be
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silently ignored"""
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os_unlink_orig = os.unlink
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os_unlink_replacement = UnconditionallyRaise(OSError)
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try:
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t = writeTmp(1, ["\n"])
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self.addCleanup(remove_tempfiles, t)
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with FileInput(files=[t], inplace=True) as fi:
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next(fi) # make sure the file is opened
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os.unlink = os_unlink_replacement
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fi.nextfile()
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finally:
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os.unlink = os_unlink_orig
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# sanity check to make sure that our test scenario was actually hit
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self.assertTrue(os_unlink_replacement.invoked,
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"os.unlink() was not invoked")
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def test_readline_os_fstat_raises_OSError(self):
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"""Tests invoking FileInput.readline() when os.fstat() raises OSError.
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This exception should be silently discarded."""
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os_fstat_orig = os.fstat
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os_fstat_replacement = UnconditionallyRaise(OSError)
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try:
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t = writeTmp(1, ["\n"])
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self.addCleanup(remove_tempfiles, t)
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with FileInput(files=[t], inplace=True) as fi:
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os.fstat = os_fstat_replacement
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fi.readline()
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finally:
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os.fstat = os_fstat_orig
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# sanity check to make sure that our test scenario was actually hit
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self.assertTrue(os_fstat_replacement.invoked,
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"os.fstat() was not invoked")
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@unittest.skipIf(not hasattr(os, "chmod"), "os.chmod does not exist")
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def test_readline_os_chmod_raises_OSError(self):
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"""Tests invoking FileInput.readline() when os.chmod() raises OSError.
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This exception should be silently discarded."""
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os_chmod_orig = os.chmod
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os_chmod_replacement = UnconditionallyRaise(OSError)
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try:
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t = writeTmp(1, ["\n"])
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self.addCleanup(remove_tempfiles, t)
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with FileInput(files=[t], inplace=True) as fi:
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os.chmod = os_chmod_replacement
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fi.readline()
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finally:
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os.chmod = os_chmod_orig
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# sanity check to make sure that our test scenario was actually hit
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self.assertTrue(os_chmod_replacement.invoked,
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"os.fstat() was not invoked")
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def test_fileno_when_ValueError_raised(self):
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class FilenoRaisesValueError(UnconditionallyRaise):
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def __init__(self):
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UnconditionallyRaise.__init__(self, ValueError)
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def fileno(self):
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self.__call__()
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unconditionally_raise_ValueError = FilenoRaisesValueError()
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t = writeTmp(1, ["\n"])
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self.addCleanup(remove_tempfiles, t)
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with FileInput(files=[t]) as fi:
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file_backup = fi._file
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try:
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fi._file = unconditionally_raise_ValueError
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result = fi.fileno()
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finally:
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fi._file = file_backup # make sure the file gets cleaned up
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# sanity check to make sure that our test scenario was actually hit
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self.assertTrue(unconditionally_raise_ValueError.invoked,
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"_file.fileno() was not invoked")
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self.assertEqual(result, -1, "fileno() should return -1")
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class MockFileInput:
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"""A class that mocks out fileinput.FileInput for use during unit tests"""
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def __init__(self, files=None, inplace=False, backup="", bufsize=0,
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mode="r", openhook=None):
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self.files = files
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self.inplace = inplace
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self.backup = backup
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self.bufsize = bufsize
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self.mode = mode
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self.openhook = openhook
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self._file = None
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self.invocation_counts = collections.defaultdict(lambda: 0)
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self.return_values = {}
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def close(self):
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self.invocation_counts["close"] += 1
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def nextfile(self):
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self.invocation_counts["nextfile"] += 1
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return self.return_values["nextfile"]
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def filename(self):
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self.invocation_counts["filename"] += 1
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return self.return_values["filename"]
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def lineno(self):
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self.invocation_counts["lineno"] += 1
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return self.return_values["lineno"]
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def filelineno(self):
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self.invocation_counts["filelineno"] += 1
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return self.return_values["filelineno"]
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def fileno(self):
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self.invocation_counts["fileno"] += 1
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return self.return_values["fileno"]
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def isfirstline(self):
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self.invocation_counts["isfirstline"] += 1
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return self.return_values["isfirstline"]
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def isstdin(self):
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self.invocation_counts["isstdin"] += 1
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return self.return_values["isstdin"]
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class BaseFileInputGlobalMethodsTest(unittest.TestCase):
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"""Base class for unit tests for the global function of
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the fileinput module."""
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def setUp(self):
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self._orig_state = fileinput._state
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self._orig_FileInput = fileinput.FileInput
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fileinput.FileInput = MockFileInput
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def tearDown(self):
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fileinput.FileInput = self._orig_FileInput
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fileinput._state = self._orig_state
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def assertExactlyOneInvocation(self, mock_file_input, method_name):
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# assert that the method with the given name was invoked once
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actual_count = mock_file_input.invocation_counts[method_name]
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self.assertEqual(actual_count, 1, method_name)
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# assert that no other unexpected methods were invoked
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actual_total_count = len(mock_file_input.invocation_counts)
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self.assertEqual(actual_total_count, 1)
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class Test_fileinput_input(BaseFileInputGlobalMethodsTest):
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"""Unit tests for fileinput.input()"""
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def test_state_is_not_None_and_state_file_is_not_None(self):
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"""Tests invoking fileinput.input() when fileinput._state is not None
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and its _file attribute is also not None. Expect RuntimeError to
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be raised with a meaningful error message and for fileinput._state
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to *not* be modified."""
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instance = MockFileInput()
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instance._file = object()
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fileinput._state = instance
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with self.assertRaises(RuntimeError) as cm:
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fileinput.input()
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self.assertEqual(("input() already active",), cm.exception.args)
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self.assertIs(instance, fileinput._state, "fileinput._state")
|
|
|
|
def test_state_is_not_None_and_state_file_is_None(self):
|
|
"""Tests invoking fileinput.input() when fileinput._state is not None
|
|
but its _file attribute *is* None. Expect it to create and return
|
|
a new fileinput.FileInput object with all method parameters passed
|
|
explicitly to the __init__() method; also ensure that
|
|
fileinput._state is set to the returned instance."""
|
|
instance = MockFileInput()
|
|
instance._file = None
|
|
fileinput._state = instance
|
|
self.do_test_call_input()
|
|
|
|
def test_state_is_None(self):
|
|
"""Tests invoking fileinput.input() when fileinput._state is None
|
|
Expect it to create and return a new fileinput.FileInput object
|
|
with all method parameters passed explicitly to the __init__()
|
|
method; also ensure that fileinput._state is set to the returned
|
|
instance."""
|
|
fileinput._state = None
|
|
self.do_test_call_input()
|
|
|
|
def do_test_call_input(self):
|
|
"""Tests that fileinput.input() creates a new fileinput.FileInput
|
|
object, passing the given parameters unmodified to
|
|
fileinput.FileInput.__init__(). Note that this test depends on the
|
|
monkey patching of fileinput.FileInput done by setUp()."""
|
|
files = object()
|
|
inplace = object()
|
|
backup = object()
|
|
bufsize = object()
|
|
mode = object()
|
|
openhook = object()
|
|
|
|
# call fileinput.input() with different values for each argument
|
|
result = fileinput.input(files=files, inplace=inplace, backup=backup,
|
|
bufsize=bufsize,
|
|
mode=mode, openhook=openhook)
|
|
|
|
# ensure fileinput._state was set to the returned object
|
|
self.assertIs(result, fileinput._state, "fileinput._state")
|
|
|
|
# ensure the parameters to fileinput.input() were passed directly
|
|
# to FileInput.__init__()
|
|
self.assertIs(files, result.files, "files")
|
|
self.assertIs(inplace, result.inplace, "inplace")
|
|
self.assertIs(backup, result.backup, "backup")
|
|
self.assertIs(bufsize, result.bufsize, "bufsize")
|
|
self.assertIs(mode, result.mode, "mode")
|
|
self.assertIs(openhook, result.openhook, "openhook")
|
|
|
|
class Test_fileinput_close(BaseFileInputGlobalMethodsTest):
|
|
"""Unit tests for fileinput.close()"""
|
|
|
|
def test_state_is_None(self):
|
|
"""Tests that fileinput.close() does nothing if fileinput._state
|
|
is None"""
|
|
fileinput._state = None
|
|
fileinput.close()
|
|
self.assertIsNone(fileinput._state)
|
|
|
|
def test_state_is_not_None(self):
|
|
"""Tests that fileinput.close() invokes close() on fileinput._state
|
|
and sets _state=None"""
|
|
instance = MockFileInput()
|
|
fileinput._state = instance
|
|
fileinput.close()
|
|
self.assertExactlyOneInvocation(instance, "close")
|
|
self.assertIsNone(fileinput._state)
|
|
|
|
class Test_fileinput_nextfile(BaseFileInputGlobalMethodsTest):
|
|
"""Unit tests for fileinput.nextfile()"""
|
|
|
|
def test_state_is_None(self):
|
|
"""Tests fileinput.nextfile() when fileinput._state is None.
|
|
Ensure that it raises RuntimeError with a meaningful error message
|
|
and does not modify fileinput._state"""
|
|
fileinput._state = None
|
|
with self.assertRaises(RuntimeError) as cm:
|
|
fileinput.nextfile()
|
|
self.assertEqual(("no active input()",), cm.exception.args)
|
|
self.assertIsNone(fileinput._state)
|
|
|
|
def test_state_is_not_None(self):
|
|
"""Tests fileinput.nextfile() when fileinput._state is not None.
|
|
Ensure that it invokes fileinput._state.nextfile() exactly once,
|
|
returns whatever it returns, and does not modify fileinput._state
|
|
to point to a different object."""
|
|
nextfile_retval = object()
|
|
instance = MockFileInput()
|
|
instance.return_values["nextfile"] = nextfile_retval
|
|
fileinput._state = instance
|
|
retval = fileinput.nextfile()
|
|
self.assertExactlyOneInvocation(instance, "nextfile")
|
|
self.assertIs(retval, nextfile_retval)
|
|
self.assertIs(fileinput._state, instance)
|
|
|
|
class Test_fileinput_filename(BaseFileInputGlobalMethodsTest):
|
|
"""Unit tests for fileinput.filename()"""
|
|
|
|
def test_state_is_None(self):
|
|
"""Tests fileinput.filename() when fileinput._state is None.
|
|
Ensure that it raises RuntimeError with a meaningful error message
|
|
and does not modify fileinput._state"""
|
|
fileinput._state = None
|
|
with self.assertRaises(RuntimeError) as cm:
|
|
fileinput.filename()
|
|
self.assertEqual(("no active input()",), cm.exception.args)
|
|
self.assertIsNone(fileinput._state)
|
|
|
|
def test_state_is_not_None(self):
|
|
"""Tests fileinput.filename() when fileinput._state is not None.
|
|
Ensure that it invokes fileinput._state.filename() exactly once,
|
|
returns whatever it returns, and does not modify fileinput._state
|
|
to point to a different object."""
|
|
filename_retval = object()
|
|
instance = MockFileInput()
|
|
instance.return_values["filename"] = filename_retval
|
|
fileinput._state = instance
|
|
retval = fileinput.filename()
|
|
self.assertExactlyOneInvocation(instance, "filename")
|
|
self.assertIs(retval, filename_retval)
|
|
self.assertIs(fileinput._state, instance)
|
|
|
|
class Test_fileinput_lineno(BaseFileInputGlobalMethodsTest):
|
|
"""Unit tests for fileinput.lineno()"""
|
|
|
|
def test_state_is_None(self):
|
|
"""Tests fileinput.lineno() when fileinput._state is None.
|
|
Ensure that it raises RuntimeError with a meaningful error message
|
|
and does not modify fileinput._state"""
|
|
fileinput._state = None
|
|
with self.assertRaises(RuntimeError) as cm:
|
|
fileinput.lineno()
|
|
self.assertEqual(("no active input()",), cm.exception.args)
|
|
self.assertIsNone(fileinput._state)
|
|
|
|
def test_state_is_not_None(self):
|
|
"""Tests fileinput.lineno() when fileinput._state is not None.
|
|
Ensure that it invokes fileinput._state.lineno() exactly once,
|
|
returns whatever it returns, and does not modify fileinput._state
|
|
to point to a different object."""
|
|
lineno_retval = object()
|
|
instance = MockFileInput()
|
|
instance.return_values["lineno"] = lineno_retval
|
|
fileinput._state = instance
|
|
retval = fileinput.lineno()
|
|
self.assertExactlyOneInvocation(instance, "lineno")
|
|
self.assertIs(retval, lineno_retval)
|
|
self.assertIs(fileinput._state, instance)
|
|
|
|
class Test_fileinput_filelineno(BaseFileInputGlobalMethodsTest):
|
|
"""Unit tests for fileinput.filelineno()"""
|
|
|
|
def test_state_is_None(self):
|
|
"""Tests fileinput.filelineno() when fileinput._state is None.
|
|
Ensure that it raises RuntimeError with a meaningful error message
|
|
and does not modify fileinput._state"""
|
|
fileinput._state = None
|
|
with self.assertRaises(RuntimeError) as cm:
|
|
fileinput.filelineno()
|
|
self.assertEqual(("no active input()",), cm.exception.args)
|
|
self.assertIsNone(fileinput._state)
|
|
|
|
def test_state_is_not_None(self):
|
|
"""Tests fileinput.filelineno() when fileinput._state is not None.
|
|
Ensure that it invokes fileinput._state.filelineno() exactly once,
|
|
returns whatever it returns, and does not modify fileinput._state
|
|
to point to a different object."""
|
|
filelineno_retval = object()
|
|
instance = MockFileInput()
|
|
instance.return_values["filelineno"] = filelineno_retval
|
|
fileinput._state = instance
|
|
retval = fileinput.filelineno()
|
|
self.assertExactlyOneInvocation(instance, "filelineno")
|
|
self.assertIs(retval, filelineno_retval)
|
|
self.assertIs(fileinput._state, instance)
|
|
|
|
class Test_fileinput_fileno(BaseFileInputGlobalMethodsTest):
|
|
"""Unit tests for fileinput.fileno()"""
|
|
|
|
def test_state_is_None(self):
|
|
"""Tests fileinput.fileno() when fileinput._state is None.
|
|
Ensure that it raises RuntimeError with a meaningful error message
|
|
and does not modify fileinput._state"""
|
|
fileinput._state = None
|
|
with self.assertRaises(RuntimeError) as cm:
|
|
fileinput.fileno()
|
|
self.assertEqual(("no active input()",), cm.exception.args)
|
|
self.assertIsNone(fileinput._state)
|
|
|
|
def test_state_is_not_None(self):
|
|
"""Tests fileinput.fileno() when fileinput._state is not None.
|
|
Ensure that it invokes fileinput._state.fileno() exactly once,
|
|
returns whatever it returns, and does not modify fileinput._state
|
|
to point to a different object."""
|
|
fileno_retval = object()
|
|
instance = MockFileInput()
|
|
instance.return_values["fileno"] = fileno_retval
|
|
instance.fileno_retval = fileno_retval
|
|
fileinput._state = instance
|
|
retval = fileinput.fileno()
|
|
self.assertExactlyOneInvocation(instance, "fileno")
|
|
self.assertIs(retval, fileno_retval)
|
|
self.assertIs(fileinput._state, instance)
|
|
|
|
class Test_fileinput_isfirstline(BaseFileInputGlobalMethodsTest):
|
|
"""Unit tests for fileinput.isfirstline()"""
|
|
|
|
def test_state_is_None(self):
|
|
"""Tests fileinput.isfirstline() when fileinput._state is None.
|
|
Ensure that it raises RuntimeError with a meaningful error message
|
|
and does not modify fileinput._state"""
|
|
fileinput._state = None
|
|
with self.assertRaises(RuntimeError) as cm:
|
|
fileinput.isfirstline()
|
|
self.assertEqual(("no active input()",), cm.exception.args)
|
|
self.assertIsNone(fileinput._state)
|
|
|
|
def test_state_is_not_None(self):
|
|
"""Tests fileinput.isfirstline() when fileinput._state is not None.
|
|
Ensure that it invokes fileinput._state.isfirstline() exactly once,
|
|
returns whatever it returns, and does not modify fileinput._state
|
|
to point to a different object."""
|
|
isfirstline_retval = object()
|
|
instance = MockFileInput()
|
|
instance.return_values["isfirstline"] = isfirstline_retval
|
|
fileinput._state = instance
|
|
retval = fileinput.isfirstline()
|
|
self.assertExactlyOneInvocation(instance, "isfirstline")
|
|
self.assertIs(retval, isfirstline_retval)
|
|
self.assertIs(fileinput._state, instance)
|
|
|
|
class Test_fileinput_isstdin(BaseFileInputGlobalMethodsTest):
|
|
"""Unit tests for fileinput.isstdin()"""
|
|
|
|
def test_state_is_None(self):
|
|
"""Tests fileinput.isstdin() when fileinput._state is None.
|
|
Ensure that it raises RuntimeError with a meaningful error message
|
|
and does not modify fileinput._state"""
|
|
fileinput._state = None
|
|
with self.assertRaises(RuntimeError) as cm:
|
|
fileinput.isstdin()
|
|
self.assertEqual(("no active input()",), cm.exception.args)
|
|
self.assertIsNone(fileinput._state)
|
|
|
|
def test_state_is_not_None(self):
|
|
"""Tests fileinput.isstdin() when fileinput._state is not None.
|
|
Ensure that it invokes fileinput._state.isstdin() exactly once,
|
|
returns whatever it returns, and does not modify fileinput._state
|
|
to point to a different object."""
|
|
isstdin_retval = object()
|
|
instance = MockFileInput()
|
|
instance.return_values["isstdin"] = isstdin_retval
|
|
fileinput._state = instance
|
|
retval = fileinput.isstdin()
|
|
self.assertExactlyOneInvocation(instance, "isstdin")
|
|
self.assertIs(retval, isstdin_retval)
|
|
self.assertIs(fileinput._state, instance)
|
|
|
|
class InvocationRecorder:
|
|
def __init__(self):
|
|
self.invocation_count = 0
|
|
def __call__(self, *args, **kwargs):
|
|
self.invocation_count += 1
|
|
self.last_invocation = (args, kwargs)
|
|
|
|
class Test_hook_compressed(unittest.TestCase):
|
|
"""Unit tests for fileinput.hook_compressed()"""
|
|
|
|
def setUp(self):
|
|
self.fake_open = InvocationRecorder()
|
|
|
|
def test_empty_string(self):
|
|
self.do_test_use_builtin_open("", 1)
|
|
|
|
def test_no_ext(self):
|
|
self.do_test_use_builtin_open("abcd", 2)
|
|
|
|
@unittest.skipUnless(gzip, "Requires gzip and zlib")
|
|
def test_gz_ext_fake(self):
|
|
original_open = gzip.open
|
|
gzip.open = self.fake_open
|
|
try:
|
|
result = fileinput.hook_compressed("test.gz", 3)
|
|
finally:
|
|
gzip.open = original_open
|
|
|
|
self.assertEqual(self.fake_open.invocation_count, 1)
|
|
self.assertEqual(self.fake_open.last_invocation, (("test.gz", 3), {}))
|
|
|
|
@unittest.skipUnless(bz2, "Requires bz2")
|
|
def test_bz2_ext_fake(self):
|
|
original_open = bz2.BZ2File
|
|
bz2.BZ2File = self.fake_open
|
|
try:
|
|
result = fileinput.hook_compressed("test.bz2", 4)
|
|
finally:
|
|
bz2.BZ2File = original_open
|
|
|
|
self.assertEqual(self.fake_open.invocation_count, 1)
|
|
self.assertEqual(self.fake_open.last_invocation, (("test.bz2", 4), {}))
|
|
|
|
def test_blah_ext(self):
|
|
self.do_test_use_builtin_open("abcd.blah", 5)
|
|
|
|
def test_gz_ext_builtin(self):
|
|
self.do_test_use_builtin_open("abcd.Gz", 6)
|
|
|
|
def test_bz2_ext_builtin(self):
|
|
self.do_test_use_builtin_open("abcd.Bz2", 7)
|
|
|
|
def do_test_use_builtin_open(self, filename, mode):
|
|
original_open = self.replace_builtin_open(self.fake_open)
|
|
try:
|
|
result = fileinput.hook_compressed(filename, mode)
|
|
finally:
|
|
self.replace_builtin_open(original_open)
|
|
|
|
self.assertEqual(self.fake_open.invocation_count, 1)
|
|
self.assertEqual(self.fake_open.last_invocation,
|
|
((filename, mode), {}))
|
|
|
|
@staticmethod
|
|
def replace_builtin_open(new_open_func):
|
|
original_open = builtins.open
|
|
builtins.open = new_open_func
|
|
return original_open
|
|
|
|
class Test_hook_encoded(unittest.TestCase):
|
|
"""Unit tests for fileinput.hook_encoded()"""
|
|
|
|
def test(self):
|
|
encoding = object()
|
|
result = fileinput.hook_encoded(encoding)
|
|
|
|
fake_open = InvocationRecorder()
|
|
original_open = builtins.open
|
|
builtins.open = fake_open
|
|
try:
|
|
filename = object()
|
|
mode = object()
|
|
open_result = result(filename, mode)
|
|
finally:
|
|
builtins.open = original_open
|
|
|
|
self.assertEqual(fake_open.invocation_count, 1)
|
|
|
|
args, kwargs = fake_open.last_invocation
|
|
self.assertIs(args[0], filename)
|
|
self.assertIs(args[1], mode)
|
|
self.assertIs(kwargs.pop('encoding'), encoding)
|
|
self.assertFalse(kwargs)
|
|
|
|
def test_main():
|
|
run_unittest(
|
|
BufferSizesTests,
|
|
FileInputTests,
|
|
Test_fileinput_input,
|
|
Test_fileinput_close,
|
|
Test_fileinput_nextfile,
|
|
Test_fileinput_filename,
|
|
Test_fileinput_lineno,
|
|
Test_fileinput_filelineno,
|
|
Test_fileinput_fileno,
|
|
Test_fileinput_isfirstline,
|
|
Test_fileinput_isstdin,
|
|
Test_hook_compressed,
|
|
Test_hook_encoded,
|
|
)
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|