summaryrefslogtreecommitdiff
path: root/test/test_testing.py
blob: 66a4093c06a07d04bea4c95498d4be6c2540e2f0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
"""Tests that our test infrastructure is really working!"""

import os, sys
sys.path.insert(0, os.path.split(__file__)[0]) # Force relative import for Py3k
from backunittest import TestCase
from coveragetest import CoverageTest

from coverage.backward import set                   # pylint: disable=W0622

class TestingTest(TestCase):
    """Tests of helper methods on `backunittest.TestCase`."""

    run_in_temp_dir = False

    def please_raise(self, exc, msg):
        """Raise an exception for testing assertRaisesRegexp."""
        raise exc(msg)

    def please_succeed(self):
        """A simple successful method for testing assertRaisesRegexp."""
        return "All is well"

    def test_assert_same_elements(self):
        self.assertSameElements(set(), set())
        self.assertSameElements(set([1,2,3]), set([3,1,2]))
        self.assertRaises(AssertionError, self.assertSameElements,
            set([1,2,3]), set()
            )
        self.assertRaises(AssertionError, self.assertSameElements,
            set([1,2,3]), set([4,5,6])
            )

    def test_assert_regexp_matches(self):
        self.assertRegexpMatches("hello", "hel*o")
        self.assertRegexpMatches("Oh, hello there!", "hel*o")
        self.assertRaises(AssertionError, self.assertRegexpMatches,
            "hello there", "^hello$"
            )

    def test_assert_multiline_equal(self):
        self.assertMultiLineEqual("hello", "hello")
        self.assertRaises(AssertionError, self.assertMultiLineEqual,
            "hello there", "Hello there"
            )
        self.assertRaises(AssertionError, self.assertMultiLineEqual,
            "hello\nthere", "hello\nThere"
            )
        # With messages also.
        self.assertMultiLineEqual("hi", "hi", "it's ok")
        self.assertRaisesRegexp(
            AssertionError, "my message",
            self.assertMultiLineEqual, "xyz", "abc", "my message"
        )

    def test_assert_raises_regexp(self):
        # Raising the right error with the right message passes.
        self.assertRaisesRegexp(
            ZeroDivisionError, "Wow! Zero!",
            self.please_raise, ZeroDivisionError, "Wow! Zero!"
            )
        # Raising the right error with a match passes.
        self.assertRaisesRegexp(
            ZeroDivisionError, "Zero",
            self.please_raise, ZeroDivisionError, "Wow! Zero!"
            )
        # Raising the right error with a mismatch fails.
        self.assertRaises(AssertionError,
            self.assertRaisesRegexp, ZeroDivisionError, "XYZ",
            self.please_raise, ZeroDivisionError, "Wow! Zero!"
            )
        # Raising the right error with a mismatch fails.
        self.assertRaises(AssertionError,
            self.assertRaisesRegexp, ZeroDivisionError, "XYZ",
            self.please_raise, ZeroDivisionError, "Wow! Zero!"
            )
        # Raising the wrong error raises the error itself.
        self.assertRaises(ZeroDivisionError,
            self.assertRaisesRegexp, IOError, "Wow! Zero!",
            self.please_raise, ZeroDivisionError, "Wow! Zero!"
            )
        # Raising no error fails.
        self.assertRaises(AssertionError,
            self.assertRaisesRegexp, ZeroDivisionError, "XYZ",
            self.please_succeed
            )

    def test_assert_true(self):
        self.assertTrue(True)
        self.assertRaises(AssertionError, self.assertTrue, False)

    def test_assert_false(self):
        self.assertFalse(False)
        self.assertRaises(AssertionError, self.assertFalse, True)


class CoverageTestTest(CoverageTest):
    """Test the methods in `CoverageTest`."""

    def test_make_file(self):
        # A simple file.
        self.make_file("fooey.boo", "Hello there")
        self.assertEqual(open("fooey.boo").read(), "Hello there")
        # A file in a sub-directory
        self.make_file("sub/another.txt", "Another")
        self.assertEqual(open("sub/another.txt").read(), "Another")
        # A second file in that sub-directory
        self.make_file("sub/second.txt", "Second")
        self.assertEqual(open("sub/second.txt").read(), "Second")
        # A deeper directory
        self.make_file("sub/deeper/evenmore/third.txt")
        self.assertEqual(open("sub/deeper/evenmore/third.txt").read(), "")

    def test_make_file_newline(self):
        self.make_file("unix.txt", "Hello\n")
        self.assertEqual(open("unix.txt", "rb").read().decode('ascii'), "Hello\n")
        self.make_file("dos.txt", "Hello\n", newline="\r\n")
        self.assertEqual(open("dos.txt", "rb").read().decode('ascii'), "Hello\r\n")
        self.make_file("mac.txt", "Hello\n", newline="\r")
        self.assertEqual(open("mac.txt", "rb").read().decode('ascii'), "Hello\r")