def test_sales_unit_as_display_unit():
sales_unit = SalesUnit(decimals=3)
display_unit = SalesUnitAsDisplayUnit(sales_unit)
assert display_unit.internal_unit == sales_unit
assert display_unit.ratio == 1
assert display_unit.decimals == sales_unit.decimals
assert display_unit.comparison_value == 1
assert display_unit.allow_bare_number is False
assert display_unit.default is False
assert display_unit.pk is None
assert display_unit == display_unit
# Name and symbol should be "lazy" to allow language switch
sales_unit.set_current_language('en')
sales_unit.symbol = "Kg"
sales_unit.name = "Kilogram"
assert display_unit.name == sales_unit.name
assert display_unit.symbol == sales_unit.symbol
assert '{}'.format(display_unit) == sales_unit.name
sales_unit.set_current_language('fi')
sales_unit.name = "kilogramma"
sales_unit.symbol = "kg"
assert display_unit.name == sales_unit.name
assert display_unit.symbol == sales_unit.symbol
assert '{}'.format(display_unit) == sales_unit.name
def test_sales_unit_as_display_unit_allow_bare_number():
each = SalesUnit(decimals=0, symbol='ea.')
kg = SalesUnit(decimals=3, symbol='kg')
assert SalesUnitAsDisplayUnit(each).allow_bare_number is True
assert SalesUnitAsDisplayUnit(kg).allow_bare_number is False