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require 'erb'
module VCR
class Cassette
# @private
class ERBRenderer
def initialize(raw_template, erb, cassette_name=nil)
@raw_template, @erb, @cassette_name = raw_template, erb, cassette_name
end
def render
return @raw_template if @raw_template.nil? || !use_erb?
binding = binding_for_variables if erb_variables
template.result(binding)
rescue NameError => e
handle_name_error(e)
end
private
def handle_name_error(e)
example_hash = (erb_variables || {}).merge(e.name => 'some value')
raise Errors::MissingERBVariableError.new(
"The ERB in the #{@cassette_name} cassette file references undefined variable #{e.name}. " +
"Pass it to the cassette using :erb => #{ example_hash.inspect }."
)
end
def use_erb?
!!@erb
end
def erb_variables
@erb if @erb.is_a?(Hash)
end
def template
@template ||= ERB.new(@raw_template)
end
@@struct_cache = Hash.new do |hash, attributes|
hash[attributes] = Struct.new(*attributes)
end
def variables_object
@variables_object ||= @@struct_cache[erb_variables.keys].new(*erb_variables.values)
end
def binding_for_variables
@binding_for_variables ||= variables_object.instance_eval { binding }
end
end
end
end
|
