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kalarani/mocking_line.rb

Last active October 28, 2015 18:30
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Use of Mocks in Unit Tests
Raw
mocking_line.rb
File.write(‘sample_file.txt’, reversed_string)
Raw
mocking_line_spec.rb
expect(File).to receive(:write).with('sample_file.txt', expected_string)
Raw
post.rb
class Post
def submit
begin
EmailService.send_mail @title, @author
rescue
Admin.notify
end
end
end
Raw
post_mocking_line_spec.rb
expect(EmailService).to receive(:send_mail).with('New post', 'someone')
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post_spec.rb
require './post.rb'
require './email_service.rb'
describe Post do
describe '#submit' do
it 'should send mail' do
post = Post.new({:title => 'New post', :author => 'someone'})
expect(EmailService).to receive(:send_mail).with('New post', 'someone')
post.submit
end
end
end
Raw
post_spec_exception_scenario.rb
require './post.rb'
require './email_service.rb'
require './admin.rb'
describe Post do
describe '#submit' do
it 'should notify admin if sending email fails' do
post = Post.new({:title => 'New post', :author => 'someone'})
expect(EmailService).to receive(:send_mail).and_throw('Something went wrong!')
expect(Admin).to receive(:notify)
post.submit
end
end
end
Raw
post_spec_positive_scenario_revisited_spec.rb
require './post.rb'
require './email_service.rb'
require './admin.rb'
describe Post do
describe '#submit' do
it 'should send mail' do
post = Post.new({:title => 'New post', :author => 'someone'})
expect(EmailService).to receive(:send_mail).with('New post', 'someone')
expect(Admin).to_not receive(:notify)
post.submit
end
end
end
Raw
string_util.rb
class StringUtil
def reverse a_string
reversed_string = a_string.reverse
File.write(‘sample_file.txt’, reversed_string)
reversed_string
end
end
Raw
string_util_spec.rb
require './string_util'
describe StringUtil do
it 'should reverse a string' do
string_util = StringUtil.new
expected_string = 'tset a si sihT'
expect(File).to receive(:write).with('sample_file.txt', expected_string)
reversed_string = string_util.reverse('This is a test')
expect(reversed_string).to eq expected_string
end
end
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