Class: FixtureBackground::Background

Inherits:
Object
  • Object
show all
Defined in:
lib/fixture_background/background.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(full_class_name, test_unit_class, parent, blk) ⇒ Background

Returns a new instance of Background.



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# File 'lib/fixture_background/background.rb', line 67

def initialize(full_class_name, test_unit_class, parent, blk)
  @test_unit_class = test_unit_class
  @full_class_name = full_class_name
  @parent = parent
  @background_block = blk
  
  FixtureBackground.clean_database!
  test_unit_class.set_callback(:setup, :before, :reset_active_record_fixture_cache, {:prepend => true})
  test_unit_class.set_callback(:setup, :before, :setup_background_ivars)  
  
  @generator = Generator.new(
    @full_class_name, background_signature, fixture_path,
    ancestors_and_own_background_blocks, @test_unit_class
  ) unless background_valid?
end

Instance Attribute Details

#background_block ⇒ Object (readonly)

Returns the value of attribute background_block.



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# File 'lib/fixture_background/background.rb', line 65

def background_block
  @background_block
end

Class Method Details

.class_by_name(class_name) ⇒ Object 



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# File 'lib/fixture_background/background.rb', line 57

def class_by_name(class_name)
  klass = Module.const_get(class_name)
  klass.is_a?(Class) && klass
rescue NameError
  return false
end

.class_for_test(full_class_name, background_to_use, test_unit_class) ⇒ Object 



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# File 'lib/fixture_background/background.rb', line 14

def class_for_test(full_class_name, background_to_use, test_unit_class)
  full_class_name = full_class_name.gsub("::", "__")
  class_by_name(full_class_name) || create_class(full_class_name, test_unit_class, background_to_use)
end

.create_class(full_class_name, parent_class, background_to_use) ⇒ Object 



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# File 'lib/fixture_background/background.rb', line 19

def create_class(full_class_name, parent_class, background_to_use)
  klass = Class.new(parent_class)

  # Rails infers the Class to be tested by the name of the testcase
  klass.instance_eval "    def name\n      \"\#{parent_class.name}\"\n    end\n  EOT\n  \n  klass.class_eval <<-EOT\n    cattr_accessor :fixture_background\n    @@background_generated = false\n    @@fixtures_enabled = false\n    \n    def initialize(*args)\n      super\n\n      if background = fixture_background\n        if !@@background_generated\n          background.generate!\n          @@background_generated = true\n        end\n        if !@@fixtures_enabled\n          self.class.fixtures :all\n          self.class.teardown_suite { FixtureBackground.clean_database! }\n          @@fixtures_enabled = true\n        end\n      end\n    end\n  EOT\n  \n  klass.fixture_background = background_to_use\n  klass.fixture_path = background_to_use.fixture_path\n  \n  Object.const_set(full_class_name, klass)\nend\n"

Instance Method Details

#ancestors_and_own_background_blocks ⇒ Object 



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# File 'lib/fixture_background/background.rb', line 87

def ancestors_and_own_background_blocks
  (@parent ? @parent.ancestors_and_own_background_blocks : []) << @background_block
end

#background_signature ⇒ Object 



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# File 'lib/fixture_background/background.rb', line 95

def background_signature
  stack = caller.reject { |line| line =~ Regexp.new(File.dirname(__FILE__)) }
  test_file_path = File.expand_path(stack.first.match(/^(.+\.rb):/)[1])
  block_syntax = ''
  IO.read(test_file_path).scan(/(?:\A|\n)([ \t]*)background\s(?:do|{)(.*?)\n\1end/m) do |match|
    block_syntax << match[1].gsub(/\s+/, '')
  end
  Digest::MD5.hexdigest(block_syntax)
end

#background_valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fixture_background/background.rb', line 91

def background_valid?
  (IO.read("#{fixture_path}/.version") rescue nil) == background_signature
end

#class_for_test ⇒ Object 



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# File 'lib/fixture_background/background.rb', line 109

def class_for_test
  self.class.class_for_test(@full_class_name, self, @test_unit_class)
end

#fixture_path ⇒ Object 



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# File 'lib/fixture_background/background.rb', line 105

def fixture_path 
  Rails.root.to_s + "/test/backgrounds/#{@full_class_name.underscore}/"
end

#generate! ⇒ Object 



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# File 'lib/fixture_background/background.rb', line 83

def generate!
  @generator.generate! if @generator
end