Function test_RangeManager_1

pyxrf/gui_module/tests/test_useful_widgets.py:209–253

RangeManager: test the function for setting and changing value type

(qtbot)

def test_RangeManager_1(qtbot):
    """
    RangeManager: test the function for setting and changing value type
    """
    rman = RangeManager()
    qtbot.addWidget(rman)
    rman.show()

    def _compare_tuples(*, returned, expected, v_type):
        assert len(returned) == len(expected), "Returned selection has wrong number of elements"
        for v in returned:
            assert isinstance(v, v_type), f"Returned value has wrong type: {type(v)})"
        npt.assert_array_almost_equal(
            returned, expected, err_msg="Returned and original selection are not identical"
        )

    # The value type is 'float' by default
    f_range = (25.123, 89.892)
    f_selection = (32.65, 47.2)
    rman.set_range(f_range[0], f_range[1])
    rman.set_selection(value_low=f_selection[0], value_high=f_selection[1])

    # Read the selection back
    _compare_tuples(returned=rman.get_selection(), expected=f_selection, v_type=float)
    _compare_tuples(returned=rman.get_range(), expected=f_range, v_type=float)

    # Switch value type to "int". Selection is expected to change because due to rouning.
    # The selection is also expected to change because the new selection is supposed to
    #   cover the same fraction of the total range, but the numbers were selected so
    #   this does not affect the result.
    selection_changed = rman.set_value_type("int")
    assert selection_changed, "Selection was not changed (expected to change)"

    i_range = tuple(round(_) for _ in f_range)
    i_selection = tuple(round(_) for _ in f_selection)

    _compare_tuples(returned=rman.get_selection(), expected=i_selection, v_type=int)
    _compare_tuples(returned=rman.get_range(), expected=i_range, v_type=int)

    # Switch value type back to "float"
    selection_changed = rman.set_value_type("float")
    assert not selection_changed, "Selection changed (not expected to change)"

    _compare_tuples(returned=rman.get_selection(), expected=i_selection, v_type=float)
    _compare_tuples(returned=rman.get_range(), expected=i_range, v_type=float)


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