| 1 | #!/usr/bin/env python2
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| 2 | from __future__ import print_function
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| 3 | """Test functions etc, for Byterun."""
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| 4 |
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| 5 | import unittest
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| 6 |
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| 7 | import six
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| 8 |
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| 9 | import vmtest
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| 10 |
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| 11 | PY3 = six.PY3
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| 12 |
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| 13 |
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| 14 | class TestFunctions(vmtest.VmTestCase):
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| 15 | def test_functions(self):
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| 16 | self.assert_ok("""\
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| 17 | def fn(a, b=17, c="Hello", d=[]):
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| 18 | d.append(99)
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| 19 | print(a, b, c, d)
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| 20 | fn(1)
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| 21 | fn(2, 3)
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| 22 | fn(3, c="Bye")
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| 23 | fn(4, d=["What?"])
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| 24 | fn(5, "b", "c")
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| 25 | """)
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| 26 |
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| 27 | def test_recursion(self):
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| 28 | self.assert_ok("""\
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| 29 | def fact(n):
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| 30 | if n <= 1:
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| 31 | return 1
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| 32 | else:
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| 33 | return n * fact(n-1)
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| 34 | f6 = fact(6)
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| 35 | print(f6)
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| 36 | assert f6 == 720
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| 37 | """)
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| 38 |
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| 39 | def test_nested_names(self):
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| 40 | self.assert_ok("""\
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| 41 | def one():
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| 42 | x = 1
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| 43 | def two():
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| 44 | x = 2
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| 45 | print(x)
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| 46 | two()
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| 47 | print(x)
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| 48 | one()
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| 49 | """)
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| 50 |
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| 51 | def test_calling_functions_with_args_kwargs(self):
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| 52 | self.assert_ok("""\
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| 53 | def fn(a, b=17, c="Hello", d=[]):
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| 54 | d.append(99)
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| 55 | print(a, b, c, d)
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| 56 | fn(6, *[77, 88])
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| 57 | fn(**{'c': 23, 'a': 7})
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| 58 | fn(6, *[77], **{'c': 23, 'd': [123]})
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| 59 | """)
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| 60 |
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| 61 | def test_defining_functions_with_args_kwargs(self):
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| 62 | self.assert_ok("""\
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| 63 | def fn(*args):
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| 64 | print("args is %r" % (args,))
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| 65 | fn(1, 2)
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| 66 | """)
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| 67 | self.assert_ok("""\
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| 68 | def fn(**kwargs):
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| 69 | print("kwargs is %r" % (kwargs,))
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| 70 | fn(red=True, blue=False)
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| 71 | """)
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| 72 | self.assert_ok("""\
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| 73 | def fn(*args, **kwargs):
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| 74 | print("args is %r" % (args,))
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| 75 | print("kwargs is %r" % (kwargs,))
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| 76 | fn(1, 2, red=True, blue=False)
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| 77 | """)
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| 78 | self.assert_ok("""\
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| 79 | def fn(x, y, *args, **kwargs):
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| 80 | print("x is %r, y is %r" % (x, y))
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| 81 | print("args is %r" % (args,))
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| 82 | print("kwargs is %r" % (kwargs,))
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| 83 | fn('a', 'b', 1, 2, red=True, blue=False)
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| 84 | """)
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| 85 |
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| 86 | def test_defining_functions_with_empty_args_kwargs(self):
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| 87 | self.assert_ok("""\
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| 88 | def fn(*args):
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| 89 | print("args is %r" % (args,))
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| 90 | fn()
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| 91 | """)
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| 92 | self.assert_ok("""\
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| 93 | def fn(**kwargs):
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| 94 | print("kwargs is %r" % (kwargs,))
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| 95 | fn()
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| 96 | """)
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| 97 | self.assert_ok("""\
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| 98 | def fn(*args, **kwargs):
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| 99 | print("args is %r, kwargs is %r" % (args, kwargs))
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| 100 | fn()
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| 101 | """)
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| 102 |
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| 103 | def test_partial(self):
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| 104 | self.assert_ok("""\
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| 105 | from _functools import partial
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| 106 |
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| 107 | def f(a,b):
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| 108 | return a-b
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| 109 |
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| 110 | f7 = partial(f, 7)
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| 111 | four = f7(3)
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| 112 | assert four == 4
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| 113 | """)
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| 114 |
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| 115 | def test_partial_with_kwargs(self):
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| 116 | self.assert_ok("""\
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| 117 | from _functools import partial
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| 118 |
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| 119 | def f(a,b,c=0,d=0):
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| 120 | return (a,b,c,d)
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| 121 |
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| 122 | f7 = partial(f, b=7, c=1)
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| 123 | them = f7(10)
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| 124 | assert them == (10,7,1,0)
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| 125 | """)
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| 126 |
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| 127 | def test_wraps(self):
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| 128 | self.assert_ok("""\
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| 129 | from functools import wraps
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| 130 | def my_decorator(f):
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| 131 | dec = wraps(f)
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| 132 | def wrapper(*args, **kwds):
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| 133 | print('Calling decorated function')
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| 134 | return f(*args, **kwds)
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| 135 | wrapper = dec(wrapper)
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| 136 | return wrapper
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| 137 |
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| 138 | @my_decorator
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| 139 | def example():
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| 140 | '''Docstring'''
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| 141 | return 17
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| 142 |
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| 143 | assert example() == 17
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| 144 | """)
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| 145 |
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| 146 |
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| 147 | class TestClosures(vmtest.VmTestCase):
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| 148 | def test_closures(self):
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| 149 | self.assert_ok("""\
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| 150 | def make_adder(x):
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| 151 | def add(y):
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| 152 | return x+y
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| 153 | return add
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| 154 | a = make_adder(10)
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| 155 | print(a(7))
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| 156 | assert a(7) == 17
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| 157 | """)
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| 158 |
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| 159 | def test_closures_store_deref(self):
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| 160 | self.assert_ok("""\
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| 161 | def make_adder(x):
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| 162 | z = x+1
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| 163 | def add(y):
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| 164 | return x+y+z
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| 165 | return add
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| 166 | a = make_adder(10)
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| 167 | print(a(7))
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| 168 | assert a(7) == 28
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| 169 | """)
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| 170 |
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| 171 | def test_closures_in_loop(self):
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| 172 | self.assert_ok("""\
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| 173 | def make_fns(x):
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| 174 | fns = []
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| 175 | for i in range(x):
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| 176 | fns.append(lambda i=i: i)
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| 177 | return fns
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| 178 | fns = make_fns(3)
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| 179 | for f in fns:
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| 180 | print(f())
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| 181 | assert (fns[0](), fns[1](), fns[2]()) == (0, 1, 2)
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| 182 | """)
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| 183 |
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| 184 | def test_closures_with_defaults(self):
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| 185 | self.assert_ok("""\
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| 186 | def make_adder(x, y=13, z=43):
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| 187 | def add(q, r=11):
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| 188 | return x+y+z+q+r
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| 189 | return add
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| 190 | a = make_adder(10, 17)
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| 191 | print(a(7))
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| 192 | assert a(7) == 88
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| 193 | """)
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| 194 |
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| 195 | def test_deep_closures(self):
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| 196 | self.assert_ok("""\
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| 197 | def f1(a):
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| 198 | b = 2*a
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| 199 | def f2(c):
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| 200 | d = 2*c
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| 201 | def f3(e):
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| 202 | f = 2*e
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| 203 | def f4(g):
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| 204 | h = 2*g
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| 205 | return a+b+c+d+e+f+g+h
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| 206 | return f4
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| 207 | return f3
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| 208 | return f2
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| 209 | answer = f1(3)(4)(5)(6)
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| 210 | print(answer)
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| 211 | assert answer == 54
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| 212 | """)
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| 213 |
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| 214 |
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| 215 | class TestGenerators(vmtest.VmTestCase):
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| 216 | def test_first(self):
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| 217 | self.assert_ok("""\
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| 218 | def two():
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| 219 | yield 1
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| 220 | yield 2
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| 221 | for i in two():
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| 222 | print(i)
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| 223 | """)
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| 224 |
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| 225 | def test_partial_generator(self):
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| 226 | self.assert_ok("""\
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| 227 | from _functools import partial
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| 228 |
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| 229 | def f(a,b):
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| 230 | num = a+b
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| 231 | while num:
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| 232 | yield num
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| 233 | num -= 1
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| 234 |
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| 235 | f2 = partial(f, 2)
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| 236 | three = f2(1)
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| 237 | assert list(three) == [3,2,1]
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| 238 | """)
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| 239 |
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| 240 | def test_yield_multiple_values(self):
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| 241 | self.assert_ok("""\
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| 242 | def triples():
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| 243 | yield 1, 2, 3
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| 244 | yield 4, 5, 6
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| 245 |
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| 246 | for a, b, c in triples():
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| 247 | print(a, b, c)
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| 248 | """)
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| 249 |
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| 250 | def test_simple_generator(self):
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| 251 | self.assert_ok("""\
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| 252 | g = (x for x in [0,1,2])
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| 253 | print(list(g))
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| 254 | """)
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| 255 |
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| 256 | def test_generator_from_generator(self):
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| 257 | self.assert_ok("""\
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| 258 | g = (x*x for x in range(5))
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| 259 | h = (y+1 for y in g)
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| 260 | print(list(h))
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| 261 | """)
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| 262 |
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| 263 | def test_generator_from_generator2(self):
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| 264 | self.assert_ok("""\
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| 265 | class Thing(object):
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| 266 | RESOURCES = ('abc', 'def')
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| 267 | def get_abc(self):
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| 268 | return "ABC"
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| 269 | def get_def(self):
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| 270 | return "DEF"
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| 271 | def resource_info(self):
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| 272 | for name in self.RESOURCES:
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| 273 | get_name = 'get_' + name
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| 274 | yield name, getattr(self, get_name)
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| 275 |
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| 276 | def boom(self):
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| 277 | #d = list((name, get()) for name, get in self.resource_info())
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| 278 | d = [(name, get()) for name, get in self.resource_info()]
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| 279 | return d
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| 280 |
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| 281 | print(Thing().boom())
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| 282 | """)
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| 283 |
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| 284 | if PY3: # PY3.3+ only
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| 285 | def test_yield_from(self):
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| 286 | self.assert_ok("""\
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| 287 | def main():
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| 288 | x = outer()
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| 289 | next(x)
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| 290 | y = x.send("Hello, World")
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| 291 | print(y)
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| 292 |
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| 293 | def outer():
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| 294 | yield from inner()
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| 295 |
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| 296 | def inner():
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| 297 | y = yield
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| 298 | yield y
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| 299 |
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| 300 | main()
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| 301 | """)
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| 302 |
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| 303 | def test_yield_from_tuple(self):
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| 304 | self.assert_ok("""\
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| 305 | def main():
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| 306 | for x in outer():
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| 307 | print(x)
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| 308 |
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| 309 | def outer():
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| 310 | yield from (1, 2, 3, 4)
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| 311 |
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| 312 | main()
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| 313 | """)
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| 314 |
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| 315 | def test_distinguish_iterators_and_generators(self):
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| 316 | self.assert_ok("""\
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| 317 | class Foo(object):
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| 318 | def __iter__(self):
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| 319 | return FooIter()
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| 320 |
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| 321 | class FooIter(object):
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| 322 | def __init__(self):
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| 323 | self.state = 0
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| 324 |
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| 325 | def __next__(self):
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| 326 | if self.state >= 10:
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| 327 | raise StopIteration
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| 328 | self.state += 1
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| 329 | return self.state
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| 330 |
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| 331 | def send(self, n):
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| 332 | print("sending")
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| 333 |
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| 334 | def outer():
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| 335 | yield from Foo()
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| 336 |
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| 337 | for x in outer():
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| 338 | print(x)
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| 339 | """)
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| 340 |
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| 341 | def test_nested_yield_from(self):
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| 342 | self.assert_ok("""\
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| 343 | def main():
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| 344 | x = outer()
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| 345 | next(x)
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| 346 | y = x.send("Hello, World")
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| 347 | print(y)
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| 348 |
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| 349 | def outer():
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| 350 | yield from middle()
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| 351 |
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| 352 | def middle():
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| 353 | yield from inner()
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| 354 |
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| 355 | def inner():
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| 356 | y = yield
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| 357 | yield y
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| 358 |
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| 359 | main()
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| 360 | """)
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| 361 |
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| 362 | def test_return_from_generator(self):
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| 363 | self.assert_ok("""\
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| 364 | def gen():
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| 365 | yield 1
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| 366 | return 2
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| 367 |
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| 368 | x = gen()
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| 369 | while True:
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| 370 | try:
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| 371 | print(next(x))
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| 372 | except StopIteration as e:
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| 373 | print(e.value)
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| 374 | break
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| 375 | """)
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| 376 |
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| 377 | def test_return_from_generator_with_yield_from(self):
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| 378 | self.assert_ok("""\
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| 379 | def returner():
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| 380 | if False:
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| 381 | yield
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| 382 | return 1
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| 383 |
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| 384 | def main():
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| 385 | y = yield from returner()
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| 386 | print(y)
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| 387 |
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| 388 | list(main())
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| 389 | """)
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| 390 |
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| 391 |
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| 392 | if __name__ == '__main__':
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| 393 | unittest.main()
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