Hi all I have this situation , I need to write unit test cases for rake tasks in my rails application but i could not figure out a way to do that. Did any one try that ?
What you can do is this..
Write your logic which will run on a rake task inside a model or class.
Write unit test for that model.
Finally call that method inside your rake task.
I found out this link for writing test cases using rspec.
Short and crisp test cases
Basically, create a module which will parse the name of the rake task, and make us available the keyword task, on which we could call expect { task.execute }.to output("your text\n").to_stdout
Here's how you will create the file,
module TaskExampleGroup extend ActiveSupport::Concern
included do
let(:task_name) { self.class.top_level_description.sub(/\Arake /, "") }
let(:tasks) { Rake::Task }
# Make the Rake task available as `task` in your examples:
subject(:task) { tasks[task_name] }
end
end
Add this in the rspec initializer file
RSpec.configure do |config|
# Tag Rake specs with `:task` metadata or put them in the spec/tasks dir
config.define_derived_metadata(:file_path => %r{/spec/tasks/}) do |metadata|
metadata[:type] = :task
end
config.include TaskExampleGroup, type: :task
config.before(:suite) do
Rails.application.load_tasks
end
end
Related
I have been trying to test a rake task with RSPEC. So far my understanding of the problem is that DB transactions are creating different contexts for each aspects of the test (one in the test context and one in the rake task execution context). Here are the two files I'm using in my test:
One to make rake tasks available in Rspec and be able to call task.execute:
...spec/support/tasks.rb
require "rake"
module TaskExampleGroup
extend ActiveSupport::Concern
included do
let(:task_name) { self.class.top_level_description.sub(/\Arake /, "") }
let(:tasks) { Rake::Task }
subject(:task) { tasks[task_name] }
end
end
RSpec.configure do |config|
config.define_derived_metadata(:file_path => %r{/spec/tasks/}) do |metadata|
metadata[:type] = :task
end
config.include TaskExampleGroup, type: :task
config.before(:suite) do
Rails.application.load_tasks
end
end
One to properly test my rake task:
...spec/tasks/reengage_spec.rb
require "rails_helper"
describe "rake reengage:unverified_users", type: :task do
let(:confirmed_user){create(:user, :confirmed)}
it "Preloads the Rails environment" do
expect(task.prerequisites).to include "environment"
end
it "Runs gracefully with no users" do
expect { task.execute }.not_to raise_error
end
it "Logs to stdout without errors" do
expect { task.execute }.to_not output.to_stderr
end
it "Reengage confirmed users" do
task.execute
expect(confirmed_user).to have_attributes(:reactivated_at => DateTime.now)
end
end
So far, when the rake task is executed through Rspec, it seems like the user I have created is not available in the context of rake, hence his . reactivated_at remains nil. I though I could use database cleaner to be able to configure DB transactions and preserve the context but I have no idea where to start.
I could end putting all this code in a lib and test it separately but I'm wondering if there is a way to do this. Is there a straightforward way to share the context of execution or to make my FactoryGirl user available when the task is initialized?
I am trying to write a Rspec test for one of my rake task, according to this post by Stephen Hagemann.
lib/tasks/retry.rake:
namespace :retry do
task :message, [:message_id] => [:environment] do |t, args|
TextMessage.new.resend!(args[:message_id])
end
end
spec/tasks/retry_spec.rb:
require 'rails_helper'
require 'rake'
describe 'retry namespace rake task' do
describe 'retry:message' do
before do
load File.expand_path("../../../lib/tasks/retry.rake", __FILE__)
Rake::Task.define_task(:environment)
end
it 'should call the resend action on the message with the specified message_id' do
message_id = "5"
expect_any_instance_of(TextMessage).to receive(:resend!).with message_id
Rake::Task["retry:message[#{message_id}]"].invoke
end
end
end
However, when I run this test, I am getting the following error:
Don't know how to build task 'retry:message[5]'
On the other hand, when I run the task with no argument as:
Rake::Task["retry:message"].invoke
I am able to get the rake task invoked, but the test fails as there is no message_id.
What is wrong with the way I'm passing in the argument into the rake task?
Thanks for all help.
So, according to this and this, the following are some ways of calling rake tasks with arguments:
Rake.application.invoke_task("my_task[arguments]")
or
Rake::Task["my_task"].invoke(arguments)
On the other hand, I was calling the task as:
Rake::Task["my_task[arguments]"].invoke
Which was a Mis combination of the above two methods.
A big thank you to Jason for his contribution and suggestion.
In my opinion, rake tasks shouldn't do things, they should only call things. I never write specs for my rake tasks, only the things they call.
Since your rake task appears to be a one-liner (as rake tasks should be, IMO), I wouldn't write a spec for it. If it were more than one line, I would move that code somewhere else to make it a one-liner.
But if you insist on writing a spec, maybe try this: Rake::Task["'retry:message[5]'"].invoke (added single quotes).
I want to test a method defined in a rake task.
rake file
#lib/tasks/simple_task.rake
namespace :xyz do
task :simple_task => :environment do
begin
if task_needs_to_run?
puts "Lets run this..."
#some code which I don't wish to test
...
end
end
end
def task_needs_to_run?
# code that needs testing
return 2 > 1
end
end
Now, I want to test this method, task_needs_to_run? in a test file
How do I do this ?
Additional note: I would ideally want test another private method in the rake task as well... But I can worry about that later.
The usual way to do this is to move all actual code into a module and leave the task implementation to be only:
require 'that_new_module'
namespace :xyz do
task :simple_task => :environment do
ThatNewModule.doit!
end
end
If you use environmental variables or command argument, just pass them in:
ThatNewModule.doit!(ENV['SOMETHING'], ARGV[1])
This way you can test and refactor the implementation without touching the rake task at all.
You can just do this:
require 'rake'
load 'simple_task.rake'
task_needs_to_run?
=> true
I tried this myself... defining a method inside a Rake namespace is the same as defining it at the top level.
loading a Rakefile doesn't run any of the tasks... it just defines them. So there is no harm in loading your Rakefile inside a test script, so you can test associated methods.
When working within a project with a rake context (something like this) already defined:
describe 'my_method(my_method_argument)' do
include_context 'rake'
it 'calls my method' do
expect(described_class.send(:my_method, my_method_argument)).to eq(expected_results)
end
end
Where can I write code to be executed only once after loading of all global fixtures, and before running any tests/specs
I tried before(:suite) with rspec 1.3.1 on Rails 2.3.11 and that seems to get executed before fixtures.
How about a rake task(/lib/tasks) ? For instance, i have one(reset_db.rake) that loads fixtures, resets db and more :
namespace :db do
desc "Drop, create, migrate, seed the database and prepare the test database for rspec"
task :reset_db => :environment do
Rake::Task['db:drop'].invoke
Rake::Task['db:create'].invoke
Rake::Task['db:migrate'].invoke
Rake::Task['db:fixtures:load'].invoke
Rake::Task['db:test:prepare'].invoke
end
end
I run into the same issue, but still haven't found any way to hook up some code after loading fixtures ... so i used the SpyrosP solution. However the problem with this way of doing is that you can't benefit anymore of the fixtures accessors helpers, since you don't load your fixtures from the rspec config but from a rake task.
So basically you neeed to recreate theese helpers like that (code is a bit dirty but seems to work for me :
#spec_helper.rb
module CustomAccessors
# Remplacement de fixtures :all
%w{yml csv}.each do |format|
paths = Dir.
glob(::Rails.root.join("spec/fixtures/*.#{format}")).
map! { |path| path.match(/\/([^\.\/]*)\./)[1] }
paths.each do |path|
define_method path do |*args|
path.singularize.camelcase.constantize.find(ActiveRecord::Fixtures.identify(args[0]))
end
end
end
end
RSpec.configure do |config|
#config.fixture_path = "#{::Rails.root}/spec/fixtures"
config.use_transactional_fixtures = true
config.include(CustomAccessors)
end
I'm attempting to use the new standard way of loading seed data in Rails 2.3.4+, the db:seed rake task.
I'm loading constant data, which is required for my application to really function correctly.
What's the best way to get the db:seed task to run before the tests, so the data is pre-populated?
The db:seed rake task primarily just loads the db/seeds.rb script. Therefore just execute that file to load the data.
load "#{Rails.root}/db/seeds.rb"
# or
Rails.application.load_seed
Where to place that depends on what testing framework you are using and whether you want it to be loaded before every test or just once at the beginning. You could put it in a setup call or in a test_helper.rb file.
I'd say it should be
namespace :db do
namespace :test do
task :prepare => :environment do
Rake::Task["db:seed"].invoke
end
end
end
Because db:test:load is not executed if you have config.active_record.schema_format = :sql (db:test:clone_structure is)
Putting something like this in lib/tasks/test_seed.rake should invoke the seed task after db:test:load:
namespace :db do
namespace :test do
task :load => :environment do
Rake::Task["db:seed"].invoke
end
end
end
I believe Steve's comment above should be the correct answer. You can use Rails.application.load_seed to load seed data into your test envoironment. However, when and how often this data is loaded depends on a few things:
Using Minitest
There is no convenient way to run this file once before all tests (see this Github issue). You'll need to load the data once before each test, likely in the setup method of your test files:
# test/models/my_model_test.rb
class LevelTest < ActiveSupport::TestCase
def setup
Rails.application.load_seed
end
# tests here...
end
Using RSpec
Use RSpec's before(:all) method to load seed data for all test for this model:
describe MyModel do
before(:all) do
Rails.application.load_seed
end
describe "my model..." do
# your tests here
end
Hope this helps.
Building on Matt's answer, if taking that sort of route, I recommend calling Rails.application.load_seed in a before(:suite) block in rspec_helper.rb rather than in a before(:all) block in any file. That way the seeding code is invoked only once for the entire test suite rather than once for each group of tests.
rspec_helper.rb:
RSpec.configure do |config|
...
config.before(:suite) do
Rails.application.load_seed
end
...
end
We're invoking db:seed as a part of db:test:prepare, with:
Rake::Task["db:seed"].invoke
That way, the seed data is loaded once for the entire test run, and not once per test class.
Adding Rake::Task["db:seed"].invoke to the db:test:prepare rake task did not work for me. If I prepared the database with rake db:test:prepare, and then entered the console within the test environment, all my seeds were there. However, the seeds did not persist between my tests.
Adding load "#{Rails.root}/db/seeds.rb" to my setup method worked fine, though.
I would love to get these seeds to load automatically and persist, but I haven't found a way to do that yet!
For those using seedbank, it changes how seeds are loaded, so you probably can't/don't want to use the load ... solution provided here.
And just putting Rake::Task['db:seed'].invoke into test_helper resulted in:
Don't know how to build task 'db:seed' (RuntimeError)
But when we added load_tasks before that, it worked:
MyApp::Application.load_tasks
Rake::Task['db:seed'].invoke