test_ffi_backend.py 文件源码

def test_ffi_new_allocator_4(self):
        ffi = FFI(backend=self.Backend())
        py.test.raises(TypeError, ffi.new_allocator, free=lambda x: None)
        #
        def myalloc2(size):
            raise LookupError
        alloc2 = ffi.new_allocator(myalloc2)
        py.test.raises(LookupError, alloc2, "int[5]")
        #
        def myalloc3(size):
            return 42
        alloc3 = ffi.new_allocator(myalloc3)
        e = py.test.raises(TypeError, alloc3, "int[5]")
        assert str(e.value) == "alloc() must return a cdata object (got int)"
        #
        def myalloc4(size):
            return ffi.cast("int", 42)
        alloc4 = ffi.new_allocator(myalloc4)
        e = py.test.raises(TypeError, alloc4, "int[5]")
        assert str(e.value) == "alloc() must return a cdata pointer, not 'int'"
        #
        def myalloc5(size):
            return ffi.NULL
        alloc5 = ffi.new_allocator(myalloc5)
        py.test.raises(MemoryError, alloc5, "int[5]")