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#! /usr/bin/env ruby
require 'spec_helper'
require 'puppet/util/instrumentation'
describe Puppet::Util::Instrumentation do
Instrumentation = Puppet::Util::Instrumentation
after(:each) do
Instrumentation.clear
end
it "should instance-load instrumentation listeners" do
Instrumentation.instance_loader(:listener).should be_instance_of(Puppet::Util::Autoload)
end
it "should have a method for registering instrumentation listeners" do
Instrumentation.should respond_to(:new_listener)
end
it "should have a method for retrieving instrumentation listener by name" do
Instrumentation.should respond_to(:listener)
end
describe "when registering listeners" do
it "should evaluate the supplied block as code for a class" do
Instrumentation.expects(:genclass).returns(Class.new { def notify(label, event, data) ; end })
Instrumentation.new_listener(:testing, :label_pattern => :for_this_label, :event => :all) { }
end
it "should subscribe a new listener instance" do
Instrumentation.expects(:genclass).returns(Class.new { def notify(label, event, data) ; end })
Instrumentation.new_listener(:testing, :label_pattern => :for_this_label, :event => :all) { }
Instrumentation.listeners.size.should == 1
Instrumentation.listeners[0].pattern.should == "for_this_label"
end
it "should be possible to access listeners by name" do
Instrumentation.expects(:genclass).returns(Class.new { def notify(label, event, data) ; end })
Instrumentation.new_listener(:testing, :label_pattern => :for_this_label, :event => :all) { }
Instrumentation["testing"].should_not be_nil
end
it "should be possible to store a new listener by name" do
listener = stub 'listener'
Instrumentation["testing"] = listener
Instrumentation["testing"].should == listener
end
it "should fail if listener is already subscribed" do
listener = stub 'listener', :notify => nil, :name => "mylistener"
Instrumentation.subscribe(listener, :for_this_label, :all)
expect { Instrumentation.subscribe(listener, :for_this_label, :all) }.to raise_error
end
it 'should call #unsubscribed' do
listener = stub 'listener', :notify => nil, :name => "mylistener"
listener.expects(:subscribed)
Instrumentation.subscribe(listener, :for_this_label, :all)
end
end
describe "when unsubscribing listener" do
it "should remove it from the listeners" do
listener = stub 'listener', :notify => nil, :name => "mylistener"
Instrumentation.subscribe(listener, :for_this_label, :all)
Instrumentation.unsubscribe(listener)
Instrumentation.listeners.size.should == 0
end
it "should warn if the listener wasn't subscribed" do
listener = stub 'listener', :notify => nil, :name => "mylistener"
Puppet.expects(:warning)
Instrumentation.unsubscribe(listener)
end
it 'should call #unsubscribed' do
listener = stub 'listener', :notify => nil, :name => "mylistener"
Instrumentation.subscribe(listener, :for_this_label, :all)
listener.expects(:unsubscribed)
Instrumentation.unsubscribe(listener)
end
end
describe "when firing events" do
it "should be able to find all listeners matching a label" do
listener = stub 'listener', :notify => nil, :name => "mylistener"
Instrumentation.subscribe(listener, :for_this_label, :all)
Instrumentation.listeners[0].enabled = true
count = 0
Instrumentation.each_listener(:for_this_label) { |l| count += 1 }
count.should == 1
end
it "should fire events to matching listeners" do
listener = stub 'listener', :notify => nil, :name => "mylistener"
Instrumentation.subscribe(listener, :for_this_label, :all)
Instrumentation.listeners[0].enabled = true
listener.expects(:notify).with(:for_this_label, :start, {})
Instrumentation.publish(:for_this_label, :start, {})
end
it "should not fire events to non-matching listeners" do
listener1 = stub 'listener1', :notify => nil, :name => "mylistener1"
listener2 = stub 'listener2', :notify => nil, :name => "mylistener2"
Instrumentation.subscribe(listener1, :for_this_label, :all)
Instrumentation.listeners[0].enabled = true
Instrumentation.subscribe(listener2, :for_this_other_label, :all)
Instrumentation.listeners[1].enabled = true
listener1.expects(:notify).never
listener2.expects(:notify).with(:for_this_other_label, :start, {})
Instrumentation.publish(:for_this_other_label, :start, {})
end
end
describe "when instrumenting code" do
before(:each) do
Instrumentation.stubs(:publish)
end
describe "with a block" do
it "should execute it" do
executed = false
Instrumentation.instrument(:event) do
executed = true
end
executed.should be_true
end
it "should publish an event before execution" do
Instrumentation.expects(:publish).with { |label,event,data| label == :event && event == :start }
Instrumentation.instrument(:event) {}
end
it "should publish an event after execution" do
Instrumentation.expects(:publish).with { |label,event,data| label == :event && event == :stop }
Instrumentation.instrument(:event) {}
end
it "should publish the event even when block raised an exception" do
Instrumentation.expects(:publish).with { |label,event,data| label == :event }
lambda { Instrumentation.instrument(:event) { raise "not working" } }.should raise_error
end
it "should retain start end finish time of the event" do
Instrumentation.expects(:publish).with { |label,event,data| data.include?(:started) and data.include?(:finished) }
Instrumentation.instrument(:event) {}
end
end
describe "without a block" do
it "should raise an error if stop is called with no matching start" do
lambda{ Instrumentation.stop(:event) }.should raise_error
end
it "should publish an event on stop" do
Instrumentation.expects(:publish).with { |label,event,data| event == :start }
Instrumentation.expects(:publish).with { |label,event,data| event == :stop and data.include?(:started) and data.include?(:finished) }
data = {}
Instrumentation.start(:event, data)
Instrumentation.stop(:event, 1, data)
end
it "should return a different id per event" do
data = {}
Instrumentation.start(:event, data).should == 1
Instrumentation.start(:event, data).should == 2
end
end
end
end
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