I need a way to check if an object is an instance of another object using RSpec. For example:
describe "new shirt" do
it "should be an instance of a Shirt object"
# How can i check if it is an instance of a shirt object
end
end
The preferred syntax is:
expect(@object).to be_a Shirt
The older syntax is:
@object.should be_an_instance_of Shirt
Note that there is a very subtle difference between the two. If Shirt were to inherit from Garment then both of these expectations will pass:
expect(@object).to be_a Shirt
expect(@object).to be_a Garment
If you do and @object is a Shirt, then the second expectation will fail:
@object.should be_an_instance_of Shirt
@object.should be_an_instance_of Garment