def test_f():
assert str(f) == "f"
assert repr(f) == "FrameProxy('f', None)"
with f.bind_datatable(dt.Frame()):
assert str(f) == "f"
assert repr(f) == "FrameProxy('f', <Frame [0 rows x 0 cols]>)"
assert repr(f) == "FrameProxy('f', None)"
def test_f_col_selector_bound1():
with f.bind_datatable(dt.Frame()):
assert f.a.safe_name() == "f_a"
assert f.abcdefghijkl.safe_name() == "f_abcdefghijkl"
assert f.abcdefghijklm.safe_name() == "f__" + str(id("abcdefghijklm"))
assert f[0].safe_name() == "f_0"
assert f[1].safe_name() == "f_1"
assert f[-1].safe_name() == "f_1_"
assert f[1000000].safe_name() == "f_1000000"
assert f[""].safe_name() == "f__" + str(id(""))
assert f["0"].safe_name() == "f__" + str(id("0"))
assert f["A/B"].safe_name() == "f__" + str(id("A/B"))
def test_f_col_selector_bound2():
dt0 = dt.Frame([[]] * 3, names=["a", "abcdefg", "abcdefghijklm"])
with f.bind_datatable(dt0):
assert (f.a).safe_name() == "f_a"
assert (f.abcdefg).safe_name() == "f_abcdefg"
assert (f.abcdefghijkl).safe_name() == "f_abcdefghijkl"
assert (f.abcdefghijklm).safe_name() == "f_2"
assert (f[0]).safe_name() == "f_a"
assert (f[1]).safe_name() == "f_abcdefg"
assert (f[2]).safe_name() == "f_2" # "f_abcdefgijklm" is too long
assert (f[3]).safe_name() == "f_3"
assert (f[-1]).safe_name() == "f_2"
assert (f[-2]).safe_name() == "f_abcdefg"
assert (f[-3]).safe_name() == "f_a"
assert (f[-4]).safe_name() == "f_4_"
assert (f.BBB).safe_name() == "f_BBB"
assert (f[""]).safe_name() == "f__" + str(id(""))
assert (f["0"]).safe_name() == "f__" + str(id("0"))
assert (f["The End."]).safe_name() == "f__" + str(id("The End."))
