Class: Lolex

Inherits:
Object
  • Object
show all
Defined in:
lib/hyper-spec/time_cop.rb,
lib/hyper-spec/time_cop.rb

Overview

Interface to the Lolex package running on the client side Below we will monkey patch Timecop to call these methods

Class Method Summary collapse

Class Method Details

.create_ticker ⇒ Object 



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# File 'lib/hyper-spec/time_cop.rb', line 50

def create_ticker
  return unless @scale && @scale > 0
  ticker = %x{
    #{@lolex}['_setInterval'].call(
      window,
      function() { #{tick} },
      #{@resolution}
    )
  }
  ticker
end

.init(page, client_time_zone, resolution) ⇒ Object 



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# File 'lib/hyper-spec/time_cop.rb', line 90

def init(page, client_time_zone, resolution)
  @capybara_page = page
  @resolution = resolution || 10
  @client_time_zone = client_time_zone
  run_pending_evaluations
  @initialized = true
end

.initialized? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/hyper-spec/time_cop.rb', line 98

def initialized?
  @initialized
end

.parse_time(str) ⇒ Object

to avoid forcing us to require time we make our own Time.parse method copied from opal.rb master branch



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# File 'lib/hyper-spec/time_cop.rb', line 9

def parse_time(str)
  `new Date(Date.parse(str))`
end

.pop ⇒ Object 



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# File 'lib/hyper-spec/time_cop.rb', line 23

def pop
  update_lolex(*stack.pop) unless stack.empty?
end

.push(mock_type, *args) ⇒ Object 



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# File 'lib/hyper-spec/time_cop.rb', line 17

def push(time, scale = 1, resolution = 10)
  time = parse_time(time) if time.is_a? String
  stack << [Time.now, @scale, @resolution]
  update_lolex(time, scale, resolution)
end

.restore ⇒ Object 



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# File 'lib/hyper-spec/time_cop.rb', line 33

def restore
  @stack = @backup_stack
  pop
end

.stack ⇒ Object 



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# File 'lib/hyper-spec/time_cop.rb', line 13

def stack
  @stack ||= []
end

.tick ⇒ Object 



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# File 'lib/hyper-spec/time_cop.rb', line 38

def tick
  real_clock = `(new #{@lolex}['_Date']).getTime()`
  mock_clock = Time.now.to_f * 1000
  real_elapsed_time = real_clock - @real_start_time
  mock_elapsed_time = mock_clock - @mock_start_time

  ticks = real_elapsed_time * @scale - mock_elapsed_time

  `#{@lolex}.tick(#{ticks.to_i})`
  nil
end

.unmock ⇒ Object 



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# File 'lib/hyper-spec/time_cop.rb', line 27

def unmock(time, resolution)
  push(time, 1, resolution)
  @backup_stack = stack
  @stack = []
end

.update_lolex(time, scale, resolution) ⇒ Object 



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# File 'lib/hyper-spec/time_cop.rb', line 62

def update_lolex(time, scale, resolution)
  `#{@lolex}.uninstall()` && return if scale.nil?
  @mock_start_time = time.to_f * 1000

  if @lolex
    `#{@lolex}['_clearInterval'].call(window, #{@ticker})` if @ticker
    @real_start_time = `(new #{@lolex}['_Date']).getTime()`
    `#{@lolex}.tick(#{@mock_start_time - Time.now.to_f * 1000})`
  else
    @real_start_time = Time.now.to_f * 1000
    @lolex = `lolex.install({ now: #{@mock_start_time} })`
  end

  @scale = scale
  @resolution = resolution
  @ticker = create_ticker
  nil # must return nil otherwise we try to return a timer to server!
end