Created
March 16, 2012 15:28
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RSpec is not the reason your rails test suite is slow
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[david: compare]$ # at this point we have a stock rails app with no minitest tests and one pending rspec example | |
[david: compare]$ | |
[david: compare]$ time rake test | |
Run options: | |
# Running tests: | |
Finished tests in 0.030419s, 0.0000 tests/s, 0.0000 assertions/s. | |
0 tests, 0 assertions, 0 failures, 0 errors, 0 skips | |
real 0m5.694s | |
user 0m4.503s | |
sys 0m0.811s | |
[david: compare]$ time rake spec | |
/Users/david/.rvm/rubies/ruby-1.9.3-p0/bin/ruby -S rspec ./spec/models/thing_spec.rb | |
* | |
Pending: | |
Thing add some examples to (or delete) /Users/david/tmp/compare/spec/models/thing_spec.rb | |
# No reason given | |
# ./spec/models/thing_spec.rb:4 | |
Finished in 0.00072 seconds | |
1 example, 0 failures, 1 pending | |
real 0m4.918s | |
user 0m3.839s | |
sys 0m0.697s | |
[david: compare]$ | |
[david: compare]$ echo 'require "test_helper" | |
> | |
> class ThingTest < ActiveSupport::TestCase | |
> test "empty" do | |
> end | |
> end | |
> ' > test/unit/thing_test.rb | |
[david: compare]$ | |
[david: compare]$ echo 'require "spec_helper" | |
> | |
> describe Thing do | |
> example "empty" do | |
> end | |
> end | |
> ' > spec/models/thing_spec.rb | |
[david: compare]$ | |
[david: compare]$ time rake test | |
Run options: | |
# Running tests: | |
. | |
Finished tests in 0.078296s, 12.7720 tests/s, 0.0000 assertions/s. | |
1 tests, 0 assertions, 0 failures, 0 errors, 0 skips | |
real 0m5.802s | |
user 0m4.565s | |
sys 0m0.847s | |
[david: compare]$ time rake spec | |
/Users/david/.rvm/rubies/ruby-1.9.3-p0/bin/ruby -S rspec ./spec/models/thing_spec.rb | |
. | |
Finished in 0.00475 seconds | |
1 example, 0 failures | |
real 0m4.950s | |
user 0m3.903s | |
sys 0m0.725s | |
[david: compare]$ | |
[david: compare]$ echo 'require "test_helper" | |
> | |
> class ThingTest < ActiveSupport::TestCase | |
> 1000.times.map do |n| | |
> test "empty #{n}" do | |
> end | |
> end | |
> end | |
> ' > test/unit/thing_test.rb | |
[david: compare]$ | |
[david: compare]$ echo 'require "spec_helper" | |
> | |
> describe Thing do | |
> 1000.times.map do |n| | |
> example "empty #{n}" do | |
> end | |
> end | |
> end | |
> ' > spec/models/thing_spec.rb | |
[david: compare]$ | |
[david: compare]$ time rake test | |
Run options: | |
# Running tests: | |
........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | |
Finished tests in 0.753860s, 1326.5062 tests/s, 0.0000 assertions/s. | |
1000 tests, 0 assertions, 0 failures, 0 errors, 0 skips | |
real 0m6.730s | |
user 0m5.047s | |
sys 0m0.887s | |
[david: compare]$ time rake spec | |
/Users/david/.rvm/rubies/ruby-1.9.3-p0/bin/ruby -S rspec ./spec/models/thing_spec.rb | |
........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | |
Finished in 0.99978 seconds | |
1000 examples, 0 failures | |
real 0m6.023s | |
user 0m4.615s | |
sys 0m0.790s |
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rails new compare | |
cd compare | |
rails g model thing name:string | |
echo "gem 'rspec-rails', '2.9.0.rc2', :group => [:development, :test]" >> Gemfile | |
bundle | |
rails g rspec:install | |
rails g model thing name:string --skip-migration | |
rake db:migrate | |
rake db:test:prepare | |
# at this point we have a stock rails app with no minitest tests and one pending rspec example | |
time rake test | |
time rake spec | |
echo 'require "test_helper" | |
class ThingTest < ActiveSupport::TestCase | |
test "empty" do | |
end | |
end | |
' > test/unit/thing_test.rb | |
echo 'require "spec_helper" | |
describe Thing do | |
example "empty" do | |
end | |
end | |
' > spec/models/thing_spec.rb | |
time rake test | |
time rake spec | |
echo 'require "test_helper" | |
class ThingTest < ActiveSupport::TestCase | |
1000.times.map do |n| | |
test "empty #{n}" do | |
end | |
end | |
end | |
' > test/unit/thing_test.rb | |
echo 'require "spec_helper" | |
describe Thing do | |
1000.times.map do |n| | |
example "empty #{n}" do | |
end | |
end | |
end | |
' > spec/models/thing_spec.rb | |
time rake test | |
time rake spec |
coreyhaines
commented
Mar 22, 2012
via email
This is the way I develop my applications, and it is wonderful.
…On Mar 22, 2012 2:01 PM, "Emmanuel Oga" < ***@***.***> wrote:
@gavingmiller http://objectsonrails.com/ shows an approach of developing
a rails app with tests that load only what's strictly necessary to run the
tests. I haven't tried this approach yet but sounds interesting.
---
Reply to this email directly or view it on GitHub:
https://gist.github.com/2050539
Gary Bernhardt does a great job of showing how to reduce test dependencies at https://www.destroyallsoftware.com
+1 to both DAS and Objects On Rails. Those were my sources of techniques to speed up my test suite.
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