我有这样的任务/lib/crawler.rake
:
namespace :crawler do
area_names = Dir[Rails.root.join("lib", "crawler", "*.rb")].map do |file_name|
File.basename(file_name, ".rb")
end
area_names.each do |area_name|
task area_name.to_sym => :environment do
logger = Logger.new("log/crawl_#{area_name}.log")
# do something
parallel_results = crawler.crawl
mutex = Mutex.new
Parallel.each(parallel_results, in_threads: [parallel_results.count, CRAWL_CONFIG["building_thread_max"]].min) do |pages|
begin
# do something
rescue => e
# do something
raise e
end
end
Availability.update_by_grounds_and_time
end
end
end
这里的逻辑,如果并行后一切正常,我们会调用update_by_grounds_and_time
方法来更新Availability
;如果得到错误,我们将停止操作并引发错误。
所以我想编写rspec来测试这些情况,我想在这里模拟/存根任务输出(传递或引发错误)并检查我们是否调用update_by_grounds_and_time
方法?
我们可以不需要调用真正的任务吗?我们可以使用Rspec Mock
吗?
答案 0 :(得分:1)
如果在Rakefile
中定义,请尝试以下操作:
require 'rake'
RSpec.describe "Rake Tasks" do
before do
file, path = Rake.application.find_rakefile_location
Rake.load_rakefile("#{path}/#{file}")
end
it "should invoke some tasks" do
expect(Availability).to receive(:update_by_grounds_and_time)
Rake.application["crawler:#{area_name}"].invoke
end
end
如果在foo.rake
中定义,请尝试以下方法:
require 'rake'
RSpec.describe "Rake Tasks" do
before do
Rake.application.rake_require('/path/to/lib/tasks/foo')
end
it "should invoke some tasks" do
expect(Availability).to receive(:update_by_grounds_and_time)
Rake.application["crawler:#{area_name}"].invoke
end
end
更新(错误案例)
例如
# foo.rake
Parallel.each(parallel_results, in_threads: [parallel_results.count, CRAWL_CONFIG["building_thread_max"]].min) do |pages|
begin
foo = Foo.new
foo.bar
# do something else
rescue => e
# do something
raise e
end
end
# foo_spec.rb
require 'rake'
RSpec.describe "Rake Tasks" do
before do
Rake.application.rake_require('/path/to/lib/tasks/foo')
end
it "should not call Availability#update_by_grounds_and_time if error raised" do
allow_any_instance_of(Foo).to receive(:bar).and_raise(StandardError)
expect(Availability).to_not receive(:update_by_grounds_and_time)
expect { Rake.application["crawler:#{area_name}"].invoke }.to raise_error(StandardError)
end
end
答案 1 :(得分:1)
在这些情况下我通常做的是将肉提取到一个单独的类/服务对象/任何东西,这更容易测试。然后rake任务变成该对象的调用者,因此不需要进行测试。