forked from Rust-related/RustPython
47e95486f0
- Move assert_raises to testutils - Add optional message argument, with reasonable default - Reverse order of expr and exception type for readability - Lambda argument no longer takes parameter - Convert applicable snippets to use assert_raises
74 lines
1.3 KiB
Python
74 lines
1.3 KiB
Python
from testutils import assert_raises
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a = []
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assert a[:] == []
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assert a[:2**100] == []
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assert a[-2**100:] == []
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assert a[::2**100] == []
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assert a[10:20] == []
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assert a[-20:-10] == []
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b = [1, 2]
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assert b[:] == [1, 2]
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assert b[:2**100] == [1, 2]
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assert b[-2**100:] == [1, 2]
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assert b[2**100:] == []
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assert b[::2**100] == [1]
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assert b[-10:1] == [1]
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assert b[0:0] == []
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assert b[1:0] == []
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assert_raises(ValueError, lambda: b[::0], 'zero step slice')
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assert b[::-1] == [2, 1]
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assert b[1::-1] == [2, 1]
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assert b[0::-1] == [1]
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assert b[0:-5:-1] == [1]
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assert b[:0:-1] == [2]
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assert b[5:0:-1] == [2]
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c = list(range(10))
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assert c[9:6:-3] == [9]
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assert c[9::-3] == [9, 6, 3, 0]
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assert c[9::-4] == [9, 5, 1]
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assert c[8::-2**100] == [8]
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assert c[7:7:-2] == []
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assert c[7:8:-2] == []
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d = "123456"
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assert d[3::-1] == "4321"
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assert d[4::-3] == "52"
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slice_a = slice(5)
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assert slice_a.start is None
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assert slice_a.stop == 5
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assert slice_a.step is None
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slice_b = slice(1, 5)
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assert slice_b.start == 1
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assert slice_b.stop == 5
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assert slice_b.step is None
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slice_c = slice(1, 5, 2)
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assert slice_c.start == 1
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assert slice_c.stop == 5
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assert slice_c.step == 2
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class SubScript(object):
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def __getitem__(self, item):
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assert type(item) == slice
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def __setitem__(self, key, value):
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assert type(key) == slice
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ss = SubScript()
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_ = ss[:]
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ss[:1] = 1
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