cpython/Lib/test/test_structseq.py

import unittest
from test import test_support

import time

class StructSeqTest(unittest.TestCase):

    def test_tuple(self):
        t = time.gmtime()
        astuple = tuple(t)
        self.assertEqual(len(t), len(astuple))
        self.assertEqual(t, astuple)

        # Check that slicing works the same way; at one point, slicing t[i:j] with
        # 0 < i < j could produce NULLs in the result.
        for i in range(-len(t), len(t)):
            self.assertEqual(t[i:], astuple[i:])
            for j in range(-len(t), len(t)):
                self.assertEqual(t[i:j], astuple[i:j])

        for j in range(-len(t), len(t)):
            self.assertEqual(t[:j], astuple[:j])

        self.assertRaises(IndexError, t.__getitem__, -len(t)-1)
        self.assertRaises(IndexError, t.__getitem__, len(t))
        for i in range(-len(t), len(t)-1):
            self.assertEqual(t[i], astuple[i])

    def test_repr(self):
        t = time.gmtime()
        repr(t)

    def test_concat(self):
        t1 = time.gmtime()
        t2 = t1 + tuple(t1)
        for i in range(len(t1)):
            self.assertEqual(t2[i], t2[i+len(t1)])

    def test_repeat(self):
        t1 = time.gmtime()
        t2 = 3 * t1
        for i in range(len(t1)):
            self.assertEqual(t2[i], t2[i+len(t1)])
            self.assertEqual(t2[i], t2[i+2*len(t1)])

    def test_contains(self):
        t1 = time.gmtime()
        for item in t1:
            self.assert_(item in t1)
        self.assert_(-42 not in t1)

    def test_hash(self):
        t1 = time.gmtime()
        self.assertEqual(hash(t1), hash(tuple(t1)))

    def test_cmp(self):
        t1 = time.gmtime()
        t2 = type(t1)(t1)
        self.assertEqual(t1, t2)
        self.assert_(not (t1 < t2))
        self.assert_(t1 <= t2)
        self.assert_(not (t1 > t2))
        self.assert_(t1 >= t2)
        self.assert_(not (t1 != t2))

    def test_fields(self):
        t = time.gmtime()
        self.assertEqual(len(t), t.n_fields)
        self.assertEqual(t.n_fields, t.n_sequence_fields+t.n_unnamed_fields)

    def test_constructor(self):
        t = time.struct_time

        self.assertRaises(TypeError, t)
        self.assertRaises(TypeError, t, None)
        self.assertRaises(TypeError, t, "123")
        self.assertRaises(TypeError, t, "123", dict={})
        self.assertRaises(TypeError, t, "123456789", dict=None)

        s = "123456789"
        self.assertEqual("".join(t(s)), s)

    def test_eviltuple(self):
        class Exc(Exception):
            pass

        # Devious code could crash structseqs' contructors
        class C:
            def __getitem__(self, i):
                raise Exc
            def __len__(self):
                return 9

        self.assertRaises(Exc, time.struct_time, C())

    def test_reduce(self):
        t = time.gmtime()
        x = t.__reduce__()

def test_main():
    test_support.run_unittest(StructSeqTest)

if __name__ == "__main__":
    test_main()