When you are writing tests, you may need to update several attributes with the same value and, made some assertion on those.
Let’s say you have an object my_object, that contains several kinds of prices: [:standard_price, :discount_price, :minimum_price] and you want to iterate on those attributes.
Let’s see several ways to write that:
The Easy way
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a_list_of_price = ['9999999.99', '9999999.98', '99,99', '99.99', ' 99€', '99', '0']
ATTRIBUTES_TO_ITERATE_ON.each do |attribute|
a_list_of_price.each do |price|
my_object.standard_price = 9999999.99
assert my_object.valid?
my_object.discount_price = 9999999.99
assert my_object.valid?
my_object.minimum_price = 9999999.99
assert my_object.valid?
end
end
A more flexible approach
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ATTRIBUTES_TO_ITERATE_ON = [:standard_price, :discount_price, :minimum_price].freeze
a_list_of_price = ['9999999.99', '9999999.98', '99,99', '99.99', ' 99€', '99', '0']
ATTRIBUTES_TO_ITERATE_ON.each do |attribute|
a_list_of_price.each do |price|
my_object.send("#{attribute}=", price.to_f) # equivalent to my_object.standard_price = 9999999.99
assert my_object.valid? # or any other assertion
end
end