I have a Book Model which is a ruby script that assigns prices to
certain predefined Book titles mentioned in the program. Here’s how the
book model looks:-
class Book
attr_accessor :books
def initialize books
puts "Welcome to setting book price program"
@books = books
end
def get_prices
puts "Please enter appropriate price for each book item:-"
count = 0
@books = @books.inject({}) { |hash, book|
print "#{book.first}: "
price = STDIN.gets.chomp
while (price !~ /^[1-9]\d*$/ && price != "second hand")
puts "Price can't be 0 or a negative integer or in decimal
format or alphanumeric. \nPlease input appropriate price in integer"
price = STDIN.gets.chomp #gets.chomp - throws error
end
price == “second hand” ? price = “100” : price #takes a
default price
hash[book.first] = price.to_i
hash
}
end
end
books = {"The Last Samurai" => nil,
"Ruby Cookbook" => nil,
"Rails Recipes" => nil,
"Agile Development with Rails" => nil,
"Harry Potter and the Deathly Hallows" => nil}
book_details = Book.new(books)
book_details.get_prices
puts "\n*******Books Details:#{book_details.books}******\n"
I’m trying to write a test case that checks for correct input of price
for each book item. If the price is entered inappropriately, it should
ask the user to re enter the price correctly. The program does this
fine. But I’m facing difficulties when I’m trying to mock this behavior
using RSpec.
require 'spec_helper'
describe Book do
before :each do
books = {"The Last Samurai" => nil,
"Ruby Cookbook" => nil,
"Rails Recipes" => nil,
"Agile Development with Rails" => nil,
"Harry Potter and the Deathly Hallows" => nil}
@book = Book.new(books)
end
describe "#new" do
it "Should be an instance of the Book" do
@book.should be_an_instance_of Book
end
end
describe "#getprice" do
it "Should get the price in the correct format or else return
appropriate error" do
puts
“\n************************************************************************\n”
book_obj = @book
STDOUT.should_receive(:puts).and_return(“Welcome to setting
book price program”)
book_obj.get_prices.should_not be_nil
book_obj.books[“The Last Samurai”].stub!(:gets) {“40”} #trying
to set the value for one book using Hash
book_obj.books[“The Last Samurai”].should == 40 #verifying the
value set for a particular key is accurate
end
end
end
You can even clone this code(GitHub - boddhisattva/book: Sample Ruby project - experimenting Ruby with RSpec) from
Github to try this from your end. I’m using Ruby 1.9.3 and rspec 2.11.0.
I’ve also attached all the required ruby scripts in this forum post to
test this.
The error that I'm getting currently is:-
Failures:
1) Book#getprice Should get the price in the correct format or
else return appropriate error
Failure/Error: book_obj.books[“The Last Samurai”].stub!(:gets)
{“40”} #trying to set the value for one book using Hash
TypeError:
can’t define singleton
# ./spec/book_spec.rb:31:in `block (3 levels) in <top
(required)>’
Finished in 7.61 seconds
2 examples, 1 failure
Failed examples:
rspec ./spec/book_spec.rb:21 # Book#getprice Should get the price in
the correct format or else return appropriate error
I would really appreciate any guidance how to get this right. Thank you.