Module: Modesty::ExperimentMethods

Included in:
API
Defined in:
lib/modesty/experiment.rb

Instance Method Summary collapse

Instance Method Details

#add_experiment(exp) ⇒ Object

Raises:



15
16
17
18
19
20
 
# File 'lib/modesty/experiment.rb', line 15

def add_experiment(exp)
    raise Experiment::Error, <<-msg if self.experiments.include? exp.slug
      Experiment #{exp.slug.inspect} already defined!
    msg
  self.experiments[exp.slug] = exp
end

#decide_identity(options) ⇒ Object 



35
36
37
38
39
40
41
42
43
44
45
 
# File 'lib/modesty/experiment.rb', line 35

def decide_identity(options)
  if options.include? :identity
    options[:identity]
  elsif options.include? :for
    options[:for]
  elsif options.include? :on
    options[:on]
  else
    Modesty.identity
  end
end

#experiment(sym, options = {}, &blk) ⇒ Object 



47
48
49
50
51
52
53
54
55
56
57
58
 
# File 'lib/modesty/experiment.rb', line 47

def experiment(sym, options={}, &blk)
  exp = self.experiments[sym]

  identity = decide_identity(options)

  interface = Experiment::Interface.new(exp, identity)
  self.with_identity identity do
    yield interface
  end

  interface.last_value
end

#experiments ⇒ Object 



7
8
9
10
11
12
13
 
# File 'lib/modesty/experiment.rb', line 7

def experiments
  @experiments ||= Hash.new do |h, k|
    raise Experiment::Error, <<-msg.squish
      Unrecognized experiment #{k.inspect}.
    msg
  end
end

#group(sym, options = {}) ⇒ Object 



70
71
72
73
74
 
# File 'lib/modesty/experiment.rb', line 70

def group(sym, options={})
  id = decide_identity(options)
  exp = self.experiments[sym]
  exp ? exp.group(id) : :control
end

#group?(sym, options = {}) ⇒ Boolean

Returns:

  • (Boolean) 


60
61
62
63
64
65
66
67
68
 
# File 'lib/modesty/experiment.rb', line 60

def group?(sym, options={})
  id = decide_identity(options)

  exp = sym.to_s.split(/\//)
  alt = exp.pop.to_sym
  exp = exp.join('/').to_sym
  exp = self.experiments[exp]
  exp.group? alt
end

#new_experiment(slug) {|Experiment::Builder.new(exp)| ... } ⇒ Object

Yields:



22
23
24
25
26
27
28
29
30
31
32
33
 
# File 'lib/modesty/experiment.rb', line 22

def new_experiment(slug, &block)
  exp = Experiment.new(slug)
  yield Experiment::Builder.new(exp) if block
  exp.metrics.each do |m|
    m.experiments << exp
    exp.alternatives.each do |a|
      Modesty.new_metric(m.slug/exp.slug/a, :parent => m, :experiment => exp)
    end
  end
  add_experiment(exp)
  exp
end