passing arguments in rspec shared example - ruby

Question

I am a bit new with Rspec.
Here is my problem
I have an example which could be shared
shared example
RSpec.shared_examples "coupons_shared" do |arg1,email,coupon1,coupon2|
it "present_coupons" do
post_rest_url = "https://blahblahblah=" + "#{arg1}" + "&email=" + "#{email}"
json_request = <<END_OF_MESSAGE
[
"#{coupon1}",
"#{coupon2}"
]
END_OF_MESSAGE
header = {:accept => "application/json",:content_type => "application/json"}
resp = RestClient.post(post_rest_url, json_request, header)
json_obj = JSON.parse(resp)
expect(json_obj[0]["ccode"]).to include("#{coupon1}")
expect(json_obj[0]["ccode"]).to include("#{coupon2}")
end
end
shared example file location is in \spec\support\shared_examples
In the actual spec file I have an example which gets the coupon and then need to present using the shared example
describe "enrol_cust" do
cust_id = '1'
coupons = []
header_basic_auth = {:accept => "application/json",:content_type => "application/json"}
random_no = (rand(999) + 10)
random_no = random_no.to_s
email = "johndoe" + "#{random_no}" + "#gmail.com"
st = 1111
st = st.to_i
before(:each) do
#dob = 20.years.ago(Date.today).strftime("%m-%d-%Y")
end
it "enrol_cust" do
post_rest_url = "https://blahblah?st=" + "#{st}"
json_request = <<END_OF_MESSAGE
{
"email": "#{email}",
"first_name": "John",
"last_name": "Doe",
"date_of_birth": "#{#dob}",
}
END_OF_MESSAGE
header = header_basic_auth
resp = RestClient.post(post_rest_url, json_request, header)
json_obj = JSON.parse(resp)
cust_id = json_obj["cid"]
end
# above example gets customer id
it "get_list" do
get_rest_url = "https://blahblah=" + "#{cust_id}" + "&st=" + "#{st}"
header = header_basic_auth
resp = RestClient.get(get_rest_url, header)
json_obj = JSON.parse(resp)
coupons = json_obj.collect {|x| x["cccode"]}
end
# above example gets coupons
# I have tried printing out the coupons and I can see the correct coupons in this example
include_examples "coupons_shared" ,"#{st}","#{email}","#{coupons[0]}","#{coupons[1]}"
When I try to pass the parameters, st and email is passed correctly. However, coupons[0] and coupons[1] is always passed as ""
I am not sure what am I missing here.

Answer 1

To pass an argument to a shared example, wrap the variable inside the example block (without listing them as you have as arguments in the example):
RSpec.shared_examples "coupons_shared" do
...code that includes your variables coupon1, coupon2 etc..
end
include_examples "coupons_shared" do
coupon1 = coupons[0]
...and so on (also works with let)...
let(:coupon1) { coupons[0] }
end
I would also strongly suggest that you stub out the HTTP requests so they aren't hitting an actual server every time you run your tests and consider using FactoryBot (or fixtures if that's your preference) to clean up a lot of the variable assignments.