Test Driven Development
0 likes325 views
This document discusses test-driven development (TDD). It provides examples of writing tests before code using a red-green-refactor process. First, a test is written and fails (red). Then code is implemented to pass the test (green). The code is then refactored while ensuring tests still pass. The document includes code examples of writing tests for a code review tool, implementing features to pass tests, and refactoring while tests remain passing.
![Design
describe "patches/index.html.erb" do
it "should have an 'update repository' link to refresh the patch set" do
@repository = “test.git”
render
rendered.should have_tag("a.update[href=’/update/test.git’]",
:text => "Update the repository")
end
end](https://image.slidesharecdn.com/tdd-111120133951-phpapp01/85/Test-Driven-Development-21-320.jpg)
Test Driven Development
- 1. Test Driven Development Experiences nucc
- 2. Ideas
- 4. Specification? it’s easy...
- 5. Specification? it’s easy... it takes an hour...
- 6. Features The program should do something... and should do another thing...
- 8. Implement Implement feature #1 feature #2 Check Check
- 9. Implement Implement Implement feature #1 feature #2 feature #3 Check Check Check
- 10. Implement Implement feature #2 feature #3 Check Interface problem... Ouch, rewrite
- 11. What’s your opinion despite of the fact it doesn’t work?
- 12. Implement Check
- 13. Design Implement Check
- 14. Design Implement Automated Check TEST
- 15. Test Driven Development Kent Beck Software Development Process Test-first programming concept
- 16. Test Design Implement Test
- 17. Test Design Implement Test
- 18. Writing test It’s not easy! Harder then implement the feature! It’s fun!
- 19. My TDD project http://github.com/nucc/check.it Review tool for GIT repository
- 21. Design describe "patches/index.html.erb" do it "should have an 'update repository' link to refresh the patch set" do @repository = “test.git” render rendered.should have_tag("a.update[href=’/update/test.git’]", :text => "Update the repository") end end
- 22. Design describe "calling /update/update_test.git" do before :each do # move references to initial commit move_git_reference :test_update_repository_branch1, :f7d10b1... move_git_reference :test_update_repository_branch2, :debf1ef84... end it "should fetch and reset --hard to the origin remote" do fetch :origin get "/update/update_test.git" branch_reference("origin/branch1").should == branch_reference("branch1") branch_reference("origin/branch2").should == branch_reference("branch2") end
- 23. Test your design (failed) .*.............*............................F***.....* Failures: 1) Update the repositories calling /update/update_test.git should fetch and reset --hard to the origin remote Failure/Error: branch_reference("origin/branch1").should == branch_reference("branch1") expected: "f7d10b1380081fa08d96191638606d8d235e24e2" got: "7460e1b30b569cdedcdbaa668e897b2a710fabe0" (using ==) # ./spec/requests/update_the_repository_to_an_url_spec.rb:27 fixed state
- 24. Implement Write as much code as you need now! Green your tests!
- 25. Implement class UpdateController < ApplicationController before_filter :repository_must_be_defined before_filter :repository_must_exist def index fetch_origin update_references render_response end ...
- 26. Implement def fetch_origin ::Grit::Git.git_timeout = 60 repository.fetch end def update_references Repository.new(repository).branches.each do |branch| repository.update_ref({}, "refs/heads/#{branch}", "origin/#branch}") end end
- 27. Test again Update the repositories for calling an URL Update the repositories calling /update/update_test.git should fetch and reset --hard to the origin remote should reset --hard the branch1 and branch2 in update_test.git should fetch and reset --hard to the origin remote should insert the commits to the database (PENDING: request) should have one minute timeout (PENDING: Not Yet Implemented)
- 28. Test Design Implement Test Refactor
- 29. Speed
- 30. Defect Test Reproduct Fix Test
- 31. Tools JUnit (Java) Google Test + Google Mock (C++) Boost Test Library (C++) RSpec (Ruby) PyUnit