test_recompiler.py 文件源码

def test_math_sin_type():
    ffi = FFI()
    ffi.cdef("double sin(double);")
    lib = verify(ffi, 'test_math_sin_type', '#include <math.h>')
    # 'lib.sin' is typed as a <built-in method> object on lib
    assert ffi.typeof(lib.sin).cname == "double(*)(double)"
    # 'x' is another <built-in method> object on lib, made very indirectly
    x = type(lib).__dir__.__get__(lib)
    py.test.raises(TypeError, ffi.typeof, x)
    #
    # present on built-in functions on CPython; must be emulated on PyPy:
    assert lib.sin.__name__ == 'sin'
    assert lib.sin.__module__ == '_CFFI_test_math_sin_type'
    assert lib.sin.__doc__ == 'direct call to the C function of the same name'