Class: Pretentious::Generator

Inherits:
Object
  • Object
show all
Defined in:
lib/pretentious/generator.rb

Class Method Summary collapse

Class Method Details

.clean_watches ⇒ Object 



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# File 'lib/pretentious/generator.rb', line 472

def self.clean_watches
  unwatch_new_instances
end

.generate_for(*klasses_or_instances, &block) ⇒ Object 



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# File 'lib/pretentious/generator.rb', line 343

def self.generate_for(*klasses_or_instances, &block)
  all_results = {}
  klasses = []
  mock_dict = {}

  klasses_or_instances.each { |klass_or_instance|
    klass = klass_or_instance.class == Class ? klass_or_instance : klass_or_instance.class
    klasses << replace_class(klass)

    mock_klasses = []

    klass._get_mock_classes.each do |mock_klass|
      mock_klasses << replace_class(mock_klass , true)
    end unless klass._get_mock_classes.nil?

    mock_dict[klass] = mock_klasses
  }

  watch_new_instances

  block.call

  unwatch_new_instances

  klasses.each { |module_space, klass, last_part, newStandInKlass|

    #restore the previous class
    restore_class module_space, klass, last_part

    mock_dict[klass].each do |_module_space, _klass, _last_part, _newStandInKlass|
      restore_class _module_space, _klass, _last_part
    end

    generator = test_generator.new
    generator.begin_spec(klass)
    num = 1

    newStandInKlass._instances.each do |instance|
      generator.generate(instance, num)
      num+=1
    end unless newStandInKlass._instances.nil?

    generator.end_spec

    result = all_results[klass]
    if result.nil?
      all_results[klass] = []
    end

    all_results[klass] = {output: generator.output, generator: generator.class }

  } unless klasses.nil?

  all_results
end

.impostor_for(module_space, klass) ⇒ Object 



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# File 'lib/pretentious/generator.rb', line 12

def self.impostor_for(module_space, klass)
  newStandInKlass = Class.new()
  name = klass.name

  #return if already an impostor
  return klass if (klass.respond_to?(:test_class))

  module_space.const_set "#{name.split('::').last}Impostor", newStandInKlass

  newStandInKlass.class_eval("
    def setup_instance(*args, &block)
      @_instance = #{klass.name}_ddt.new(*args, &block)
    end
  ")

  newStandInKlass.class_eval("
    class << self
      def _get_standin_class
        #{newStandInKlass}
      end

      def test_class
        #{klass.name}
      end

      def _current_old_class
        #{klass.name}_ddt
      end
    end
  ")

  newStandInKlass.class_exec do

    def initialize(*args, &block)

      @_instance_init = {object_id: self.object_id, params: [], block: nil}

      self.class.replace_procs_with_recorders(args)

      @_instance_init[:params] = args


      recordedProc = if (block)
                       RecordedProc.new(block, true)
                     else
                       nil
                     end

      @_instance_init[:block] = recordedProc

      setup_instance(*args, &recordedProc)
      param_types = @_instance.method(:initialize).parameters
      @_instance_init[:params_types] = param_types

      @_method_calls = []
      @_method_calls_by_method = {}
      @_methods_for_test = []
      @_let_variables = {}


      @_init_let_variables = {}

      caller_context = binding.of_caller(2)
      v_locals = caller_context.eval('local_variables')

      v_locals.each { |v|
        variable_value = caller_context.eval("#{v.to_s}")
        @_init_let_variables[variable_value.object_id] = v
      }

      args.each_with_index { |a, index|
        @_init_let_variables[a.object_id] = param_types[index][1].to_s if param_types.size == 2
      }

      self.class._add_instances(self)
    end

    def _init_arguments
      @_instance_init
    end

    def test_class
      @_instance.class
    end

    def include_for_tests(method_list = [])
      @_methods_for_test = @_methods_for_test + method_list
    end

    def let_variables
      @_let_variables
    end

    def init_let_variables
      @_init_let_variables
    end

    def method_calls_by_method
      @_method_calls_by_method
    end

    def method_calls
      @_method_calls
    end

    def to_s
      @_instance.to_s
    end

    def ==(other)
      @_instance==other
    end

    def kind_of?(klass)
      @_instance.kind_of? klass
    end

    def methods
      @_instance.methods + [:method_calls]
    end

    def freeze
      @_instance.freeze
    end

    def hash
      @instance.hash
    end

    def inspect
      @_instance.inspect
    end

    def is_a?(something)
      @_instance.is_a? something
    end

    def instance_variable_get(sym)
      @_instance.instance_variable_get(sym)
    end

    def instance_variable_set(sym, val)
      @_instance.instance_variable_get(sym, val)
    end

    class << self

      def replace_procs_with_recorders(args)
        (0..args.size).each do |index|
          if (args[index].kind_of? Proc)
            args[index] = Pretentious::RecordedProc.new(args[index]) {}
          end
        end
      end

      def _set_is_stub
        @_is_stub = true
      end

      def _is_stub?
        @_is_stub = @_is_stub || false
        @_is_stub
      end

      def _add_instances(instance)
        @_instances = @_instances || []
        @_instances << instance unless @_instances.include? instance
      end

      def let_variables
        @_let_variables
      end

      def method_calls_by_method
        @_method_calls_by_method
      end

      def method_calls
        @_method_calls
      end

      def _add_instances(instance)
        @_instances = @_instances || []
        @_instances << instance unless @_instances.include? instance
      end

      def _instances
        @_instances
      end

      def instance_methods
        methods = super
        test_class.instance_methods + methods
      end

      def _call_method(target, method_sym, *arguments, &block)

        klass = _get_standin_class
        caller_context = binding.of_caller(2)

        is_stub = _is_stub?

        target.instance_exec do
          @_method_calls = @_method_calls || []
          @_method_calls_by_method = @_method_calls_by_method || {}
          @_methods_for_test = @_methods_for_test || []
          @_let_variables = @_let_variables || {}

          v_locals = caller_context.eval('local_variables')

          v_locals.each { |v|
            variable_value = caller_context.eval("#{v.to_s}")
              @_let_variables[variable_value.object_id] = v
            }

            klass.replace_procs_with_recorders(arguments)

            info_block = {}
            info_block[:method] = method_sym
            info_block[:params] = arguments

            recordedProc = if (block)
                        RecordedProc.new(block, true)
                       else
                         nil
                       end
            info_block[:block] = recordedProc

            info_block[:names] = @_instance.method(method_sym).parameters

            begin

              unless is_stub
                current_context = { calls: [] }
                info_block[:context] = current_context

                Thread.current._push_context(current_context)
              end

              if (@_instance.methods.include? method_sym)
                result = @_instance.send(method_sym, *arguments, &recordedProc)
              else
                result = @_instance.send(:method_missing, method_sym, *arguments, &recordedProc)
              end

              Thread.current._pop_context unless is_stub

              # methods that end with = are a special case with return values
              if method_sym.to_s.end_with? '='
                info_block[:result] = arguments[0]
              else
                info_block[:result] = result
              end

            rescue Exception=>e
              info_block[:result] = e
            rescue StandardError=>e
              info_block[:result] = e
            end

            if is_stub
              info_block[:class] = test_class
              Thread.current._all_context.each { |mock_context|
                mock_context[:calls] << info_block if mock_context
              }
            end

            @_method_calls << info_block

            if (@_method_calls_by_method[method_sym].nil?)
              @_method_calls_by_method[method_sym] = []
            end

            @_method_calls_by_method[method_sym] << info_block
            raise e if (e.kind_of? Exception)
            result
        end
      end

    end

  end

  newStandInKlass.class_exec do
    def method_missing(method_sym, *arguments, &block)
      #puts "#{method_sym} #{arguments}"
      self.class._call_method(self, method_sym, *arguments, &block)
    end

    class << self
        def method_missing(method_sym, *arguments, &block)
          #puts "method #{method_sym.to_s}"
          _add_instances(self)
          @_instance = _current_old_class
          _call_method(self, method_sym, *arguments, &block)
        end
    end
  end

  newStandInKlass
end

.replace_class(klass, stub = false) ⇒ Object 



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# File 'lib/pretentious/generator.rb', line 314

def self.replace_class(klass, stub = false)
  klass_name_parts = klass.name.split('::')
  last_part = klass_name_parts.pop

  module_space = Object

  if (klass_name_parts.size > 0)
    klass_name_parts.each do |part|
      module_space = module_space.const_get(part)
    end
  end

  newStandInKlass = impostor_for module_space, klass
  newStandInKlass._set_is_stub if stub

  module_space.send(:remove_const,last_part.to_sym)
  module_space.const_set("#{last_part}_ddt", klass)
  module_space.const_set("#{last_part}", newStandInKlass)

  [module_space, klass, last_part, newStandInKlass]
end

.restore_class(module_space, klass, last_part) ⇒ Object 



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# File 'lib/pretentious/generator.rb', line 336

def self.restore_class(module_space, klass, last_part)
  module_space.send(:remove_const,"#{last_part}Impostor".to_sym)
  module_space.send(:remove_const,"#{last_part}".to_sym)
  module_space.const_set(last_part, klass)
  module_space.send(:remove_const,"#{last_part}_ddt".to_sym)
end

.test_generator ⇒ Object 



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# File 'lib/pretentious/generator.rb', line 8

def self.test_generator
  @test_generator || Pretentious::RspecGenerator
end

.test_generator=(generator) ⇒ Object 



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# File 'lib/pretentious/generator.rb', line 4

def self.test_generator=(generator)
  @test_generator = generator
end

.unwatch_new_instances ⇒ Object 



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# File 'lib/pretentious/generator.rb', line 476

def self.unwatch_new_instances
  if (Class.respond_to?(:_ddt_old_new))
    Class.class_eval do
      remove_method :new
      alias_method :new, :_ddt_old_new
      remove_method :_ddt_old_new
    end
  end
end

.watch_new_instances ⇒ Object 



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# File 'lib/pretentious/generator.rb', line 399

def self.watch_new_instances
  Object.class_eval do
    def _get_init_arguments
      @_init_arguments
    end

    def _set_init_arguments(*args, &block)
      @_init_arguments = @_init_arguments || {}
      @_init_arguments[:params]  = args
      unless (block.nil?)
        @_init_arguments[:block] = RecordedProc.new(block) {}
      end
      @_variable_names = {}

      params = if (self.respond_to? :test_class )
                  test_class.instance_method(:initialize).parameters
                else
                  method(:initialize).parameters
               end
      @_init_arguments[:params_types] = params

      args.each_with_index do |arg, index|
        p = params[index]
        if p.size > 1
          @_variable_names[arg.object_id] = p[1].to_s
        end unless p.nil?
      end unless args.nil?

    end

    def _variable_map
      @_variable_names || {}
    end

    def _deconstruct
      Pretentious::Deconstructor.new().deconstruct([], self)
    end

    def _deconstruct_to_ruby(var_name = nil, indentation = 0)
      variable_names = {}

      caller_context = binding.of_caller(1)
      v_locals = caller_context.eval('local_variables')

      v_locals.each { |v|
        variable_value = caller_context.eval("#{v.to_s}")
        if self.object_id == variable_value.object_id
          variable_names[variable_value.object_id] = v
        end
      }

      variable_names = _variable_map.merge({self.object_id => var_name}) unless var_name.nil?
      Pretentious::Deconstructor.new().deconstruct_to_ruby(indentation, variable_names, {}, [], self)
    end

  end

  #make sure it is set only once
  if (!Class.instance_methods.include?(:_ddt_old_new))
    Class.class_eval do
      alias_method :_ddt_old_new, :new

      def new(*args, &block)
        instance = _ddt_old_new(*args, &block)
        instance._set_init_arguments(*args, &block)
        instance
      end

    end
  end

end