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1 | 1 | # Tests StringIO and cStringIO |
2 | 2 |
|
3 | | -def do_test(module): |
4 | | - s = ("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"+'\n')*5 |
5 | | - f = module.StringIO(s) |
6 | | - print f.read(10) |
7 | | - print f.readline() |
8 | | - print len(f.readlines(60)) |
9 | | - |
10 | | - f = module.StringIO() |
11 | | - f.write('abcdef') |
12 | | - f.seek(3) |
13 | | - f.write('uvwxyz') |
14 | | - f.write('!') |
15 | | - print `f.getvalue()` |
16 | | - f.close() |
17 | | - |
18 | | - f = module.StringIO() |
19 | | - f.writelines(["a", "b", "c"]) |
20 | | - f.seek(0) |
21 | | - print `f.getvalue()` |
22 | | - f.close() |
23 | | - |
24 | | - f = module.StringIO() |
25 | | - f.write(s) |
26 | | - f.seek(10) |
27 | | - f.truncate() |
28 | | - print `f.getvalue()` |
29 | | - f.seek(0) |
30 | | - f.truncate(5) |
31 | | - print `f.getvalue()` |
32 | | - f.close() |
33 | | - try: |
34 | | - f.write("frobnitz") |
35 | | - except ValueError, e: |
36 | | - print "Caught expected ValueError writing to closed StringIO:" |
37 | | - print e |
38 | | - else: |
39 | | - print "Failed to catch ValueError writing to closed StringIO." |
40 | | - |
41 | | -import StringIO, cStringIO |
42 | | -do_test(StringIO) |
43 | | -do_test(cStringIO) |
| 3 | +import unittest |
| 4 | +import StringIO |
| 5 | +import cStringIO |
| 6 | +import types |
| 7 | +import test_support |
| 8 | + |
| 9 | + |
| 10 | +class TestGenericStringIO(unittest.TestCase): |
| 11 | + # use a class variable MODULE to define which module is being tested |
| 12 | + |
| 13 | + def setUp(self): |
| 14 | + self._line = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' |
| 15 | + self._lines = (self._line + '\n') * 5 |
| 16 | + self._fp = self.MODULE.StringIO(self._lines) |
| 17 | + |
| 18 | + def test_reads(self): |
| 19 | + eq = self.assertEqual |
| 20 | + eq(self._fp.read(10), 'abcdefghij') |
| 21 | + eq(self._fp.readline(), 'klmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ\n') |
| 22 | + eq(len(self._fp.readlines(60)), 2) |
| 23 | + |
| 24 | + def test_writes(self): |
| 25 | + f = self.MODULE.StringIO() |
| 26 | + f.write('abcdef') |
| 27 | + f.seek(3) |
| 28 | + f.write('uvwxyz') |
| 29 | + f.write('!') |
| 30 | + self.assertEqual(f.getvalue(), 'abcuvwxyz!') |
| 31 | + |
| 32 | + def test_writelines(self): |
| 33 | + f = self.MODULE.StringIO() |
| 34 | + f.writelines(['a', 'b', 'c']) |
| 35 | + f.seek(0) |
| 36 | + self.assertEqual(f.getvalue(), 'abc') |
| 37 | + |
| 38 | + def test_truncate(self): |
| 39 | + eq = self.assertEqual |
| 40 | + f = self.MODULE.StringIO() |
| 41 | + f.write(self._lines) |
| 42 | + f.seek(10) |
| 43 | + f.truncate() |
| 44 | + eq(f.getvalue(), 'abcdefghij') |
| 45 | + f.seek(0) |
| 46 | + f.truncate(5) |
| 47 | + eq(f.getvalue(), 'abcde') |
| 48 | + f.close() |
| 49 | + self.assertRaises(ValueError, f.write, 'frobnitz') |
| 50 | + |
| 51 | + def test_iterator(self): |
| 52 | + eq = self.assertEqual |
| 53 | + it = iter(self._fp) |
| 54 | + self.failUnless(isinstance(it, types.FunctionIterType)) |
| 55 | + i = 0 |
| 56 | + for line in self._fp: |
| 57 | + eq(line, self._line + '\n') |
| 58 | + i += 1 |
| 59 | + eq(i, 5) |
| 60 | + |
| 61 | +class TestStringIO(TestGenericStringIO): |
| 62 | + MODULE = StringIO |
| 63 | + |
| 64 | +class TestcStringIO(TestGenericStringIO): |
| 65 | + MODULE = cStringIO |
| 66 | + |
| 67 | + |
| 68 | +def test_main(): |
| 69 | + test_support.run_unittest(TestStringIO) |
| 70 | + test_support.run_unittest(TestcStringIO) |
| 71 | + |
| 72 | +if __name__ == '__main__': |
| 73 | + test_main() |
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