backend_tests.py 文件源码

def test_new_array_varsize(self):
        ffi = FFI(backend=self.Backend())
        p = ffi.new("int[]", 10)     # a single integer is the length
        assert p[9] == 0
        py.test.raises(IndexError, "p[10]")
        #
        py.test.raises(TypeError, ffi.new, "int[]")
        #
        p = ffi.new("int[]", [-6, -7])    # a list is all the items, like C
        assert p[0] == -6
        assert p[1] == -7
        py.test.raises(IndexError, "p[2]")
        assert repr(p) == "<cdata 'int[]' owning %d bytes>" % (2*SIZE_OF_INT)
        #
        p = ffi.new("int[]", 0)
        py.test.raises(IndexError, "p[0]")
        py.test.raises(ValueError, ffi.new, "int[]", -1)
        assert repr(p) == "<cdata 'int[]' owning 0 bytes>"