Rspec basic sample

gistfile1.rb

require "calc"

RSpec.describe Calc do
	# before do
	# 	@calc = Calc.new
	# end
	subject(:calc) {
		#message expectation if not called -> test fail
		logger = double('logger')
		expect(logger).to receive(:log)

		calc = Calc.new(logger)
	}
	context "when calc mode" do
		it "given 2 and 3, return 5" do
			expect(calc.add(2,3)).to eq(5)
		end
		it "given 5 and 8, return 13" do
			expect(calc.add(5,8)).to eq(13)
			# expect(calc.add(5,8)).not_to eq(5)
			# expect(calc.add(5,8)).to be true
			# expect(calc.add(5,8)).to be false
			# expect(calc.add(5,8)).to be > 10
			# expect(calc.add(5,8)).to be_between(1,10).inclusive
			# expect(calc.add(5,8)).to respond_to(:add)
			# expect(calc.add(5,8).integer?).to be true
			# expect(calc.add(5,8)).to be_integer
		end
	end
	context "tax calcurate" do
		# let
		# exampleごとに結果がキャッシュされる。example内で一度も呼び出されない場合は評価されない
		# 遅延評価を回避したい場合は let! で定義しておく
		let(:price) { 100 }
		it { expect(calc.price(price,0.05)).to eq(105) }
		it { expect(calc.price(price,0.08)).to eq(108) }
	end
	#stub test
	context "add with user name" do
		it {
			user = double('user')
			allow(user).to receive(:name).and_return('ohnami')
			expect(calc.addWithName(5,2,user.name)).to eq('7 by ohnami')
		}
	end
end