def buffer_size_test(self, t1, t2, t3, t4, bs=0, round=0):
        pat = re.compile(r'LINE (\d+) OF FILE (\d+)')

        start = 1 + round*6
        if verbose:
            print '%s. Simple iteration (bs=%s)' % (start+0, bs)
        fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
        lines = list(fi)
        fi.close()
        self.assertEqual(len(lines), 31)
        self.assertEqual(lines[4], 'Line 5 of file 1\n')
        self.assertEqual(lines[30], 'Line 1 of file 4\n')
        self.assertEqual(fi.lineno(), 31)
        self.assertEqual(fi.filename(), t4)

        if verbose:
            print '%s. Status variables (bs=%s)' % (start+1, bs)
        fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
        s = "x"
        while s and s != 'Line 6 of file 2\n':
            s = fi.readline()
        self.assertEqual(fi.filename(), t2)
        self.assertEqual(fi.lineno(), 21)
        self.assertEqual(fi.filelineno(), 6)
        self.assertFalse(fi.isfirstline())
        self.assertFalse(fi.isstdin())

        if verbose:
            print '%s. Nextfile (bs=%s)' % (start+2, bs)
        fi.nextfile()
        self.assertEqual(fi.readline(), 'Line 1 of file 3\n')
        self.assertEqual(fi.lineno(), 22)
        fi.close()

        if verbose:
            print '%s. Stdin (bs=%s)' % (start+3, bs)
        fi = FileInput(files=(t1, t2, t3, t4, '-'), bufsize=bs)
        savestdin = sys.stdin
        try:
            sys.stdin = StringIO("Line 1 of stdin\nLine 2 of stdin\n")
            lines = list(fi)
            self.assertEqual(len(lines), 33)
            self.assertEqual(lines[32], 'Line 2 of stdin\n')
            self.assertEqual(fi.filename(), '<stdin>')
            fi.nextfile()
        finally:
            sys.stdin = savestdin

        if verbose:
            print '%s. Boundary conditions (bs=%s)' % (start+4, bs)
        fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
        self.assertEqual(fi.lineno(), 0)
        self.assertEqual(fi.filename(), None)
        fi.nextfile()
        self.assertEqual(fi.lineno(), 0)
        self.assertEqual(fi.filename(), None)

        if verbose:
            print '%s. Inplace (bs=%s)' % (start+5, bs)
        savestdout = sys.stdout
        try:
            fi = FileInput(files=(t1, t2, t3, t4), inplace=1, bufsize=bs)
            for line in fi:
                line = line[:-1].upper()
                print line
            fi.close()
        finally:
            sys.stdout = savestdout

        fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
        for line in fi:
            self.assertEqual(line[-1], '\n')
            m = pat.match(line[:-1])
            self.assertNotEqual(m, None)
            self.assertEqual(int(m.group(1)), fi.filelineno())
        fi.close()
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/test/test_fileinput.py/BufferSizesTests.buffer_size_test/original