Class: Cheffish::RSpec::RecipeRunWrapper

Inherits:
ChefRun
  • Object
show all
Defined in:
lib/cheffish/rspec/recipe_run_wrapper.rb

Instance Attribute Summary collapse

Attributes inherited from ChefRun

#chef_config

Instance Method Summary collapse

Methods inherited from ChefRun

#compile_recipe, #converge, #converge_failed?, #converged?, #event_sink, #logged_errors, #logged_info, #logged_warnings, #logs, #output_for_failure_message, #reset, #resources, #stderr, #stdout, #up_to_date?, #updated?

Constructor Details

#initialize(chef_config, example: nil, &recipe) ⇒ RecipeRunWrapper

Returns a new instance of RecipeRunWrapper.



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# File 'lib/cheffish/rspec/recipe_run_wrapper.rb', line 7

def initialize(chef_config, example: nil, &recipe)
  super(chef_config)
  @recipe = recipe
  @example = example || recipe.binding.eval("self")
end

Instance Attribute Details

#example ⇒ Object (readonly)

Returns the value of attribute example.



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# File 'lib/cheffish/rspec/recipe_run_wrapper.rb', line 14

def example
  @example
end

#recipe ⇒ Object (readonly)

Returns the value of attribute recipe.



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# File 'lib/cheffish/rspec/recipe_run_wrapper.rb', line 13

def recipe
  @recipe
end

Instance Method Details

#client ⇒ Object 



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# File 'lib/cheffish/rspec/recipe_run_wrapper.rb', line 16

def client
  unless @client
    super
    example = self.example

    #
    # Support for both resources and rspec example's let variables:
    #
    # In 12.4, the elimination of a bunch of metaprogramming in 12.4
    # changed how Chef DSL is defined in code: resource methods are now
    # explicitly defined in `Chef::DSL::Recipe`. In 12.3, no actual
    # methods were defined and `respond_to?(:file)` would return false.
    # If we reach `method_missing` here, it means that we either have a
    # 12.3-ish resource or we want to call a `let` variable.
    #
    @client.instance_eval { @rspec_example = example }
    def @client.method_missing(name, *args, &block) # rubocop:disable Lint/NestedMethodDefinition
      # If there is a let variable, call it. This is because in 12.4,
      # the parent class is going to call respond_to?(name) to find out
      # if someone was doing weird things, and then call send(). This
      # would result in an infinite loop, coming right. Back. Here.
      # A fix to chef is incoming, but we still need this if we want to
      # work with Chef 12.4.
      if Gem::Version.new(Chef::VERSION) >= Gem::Version.new("12.4")
        if @rspec_example.respond_to?(name)
          return @rspec_example.public_send(name, *args, &block)
        end
      end

      # In 12.3 or below, method_missing was the only way to call
      # resources. If we are in 12.4, we still need to call the crazy
      # method_missing metaprogramming because backcompat.
      begin
        super
      rescue NameError
        if @rspec_example.respond_to?(name)
          @rspec_example.public_send(name, *args, &block)
        else
          raise
        end
      end
    end

    # This is called by respond_to?, and is required to make sure the
    # resource knows that we will in fact call the given method.
    def @client.respond_to_missing?(name, include_private = false) # rubocop:disable Lint/NestedMethodDefinition
      @rspec_example.respond_to?(name, include_private) || super
    end

    # Respond true to is_a?(Chef::Provider) so that Chef::Recipe::DSL.build_resource
    # will hook resources up to the example let variables as well (via
    # enclosing_provider).
    # Please don't hurt me
    def @client.is_a?(klass) # rubocop:disable Lint/NestedMethodDefinition
      klass == Chef::Provider || super(klass)
    end

    @client.load_block(&recipe)
  end
  @client
end