module GeneratorSpec::GeneratorExampleGroup::InstanceMethods

def assert_class_method(method, content, &block)


end
end
assert_match /create_table/, up
assert_class_method :up, migration do |up|
assert_migration "db/migrate/create_products.rb" do |migration|

When a block is given, it yields the content of the method.
class methods inside (class << self), only class methods which starts with "self.".
Asserts the given class method exists in the given content. This method does not detect 
def assert_class_method(method, content, &block)
  assert_instance_method "self.#{method}", content, &block
end

def assert_field_default_value(attribute_type, value)


assert_field_type :string, "MyString"

Asserts the given attribute type gets a proper default value: 
def assert_field_default_value(attribute_type, value)
  assert_equal(value, create_generated_attribute(attribute_type).default)
end

def assert_field_type(attribute_type, field_type)


assert_field_type :date, :date_select

properly:
Asserts the given attribute type gets translated to a field type 
def assert_field_type(attribute_type, field_type)
  assert_equal(field_type, create_generated_attribute(attribute_type).field_type)
end

def assert_file(relative, *contents)


end
end
assert_match /Product\.all/, index
assert_instance_method :index, content do |index|
assert_file "app/controller/products_controller.rb" do |controller|

Finally, when a block is given, it yields the file content:

assert_file "config/environment.rb", /initialize/

file with the given string:
regular expression matches the given file content. If it's a string, it compares the
You can also give extra arguments. If the argument is a regexp, it will check if the

assert_file "config/environment.rb"

to the configured destination:
Asserts a given file exists. You need to supply an absolute path or a path relative 
def assert_file(relative, *contents)
  absolute = File.expand_path(relative, destination_root)
  assert File.exists?(absolute), "Expected file #{relative.inspect} to exist, but does not"
  read = File.read(absolute) if block_given? || !contents.empty?
  yield read if block_given?
  contents.each do |content|
    case content
      when String
        assert_equal content, read
      when Regexp
        assert_match content, read
    end
  end
end

def assert_instance_method(method, content)


end
end
assert_match /Product\.all/, index
assert_instance_method :index, content do |index|
assert_file "app/controller/products_controller.rb" do |controller|

it yields the content of the method.
Asserts the given method exists in the given content. When a block is given, 
def assert_instance_method(method, content)
  assert content =~ /def #{method}(\(.+\))?(.*?)\n  end/m, "Expected to have method #{method}"
  yield $2.strip if block_given?
end

def assert_migration(relative, *contents, &block)


Consequently, assert_migration accepts the same arguments has assert_file.

assert_file "db/migrate/003_create_products.rb"

matches the migration name. For example, the call above is converted to:
This method manipulates the given path and tries to find any migration which

assert_migration "db/migrate/create_products.rb"

path relative to the configured destination:
Asserts a given file does not exist. You need to supply an absolute path or a 
def assert_migration(relative, *contents, &block)
  file_name = migration_file_name(relative)
  assert file_name, "Expected migration #{relative} to exist, but was not found"
  assert_file file_name, *contents, &block
end

def assert_no_file(relative)


assert_no_file "config/random.rb"

path relative to the configured destination:
Asserts a given file does not exist. You need to supply an absolute path or a 
def assert_no_file(relative)
  absolute = File.expand_path(relative, destination_root)
  assert !File.exists?(absolute), "Expected file #{relative.inspect} to not exist, but does"
end

def assert_no_migration(relative)


assert_no_file "config/random.rb"

path relative to the configured destination:
Asserts a given migration does not exist. You need to supply an absolute path or a 
def assert_no_migration(relative)
  file_name = migration_file_name(relative)
  assert_nil file_name, "Expected migration #{relative} to not exist, but found #{file_name}"
end

def capture(stream)


stream # => "Cool\n"
stream = capture(:stdout){ puts "Cool" }

Captures the given stream and returns it: 
def capture(stream)
  begin
    stream = stream.to_s
    eval "$#{stream} = StringIO.new"
    yield
    result = eval("$#{stream}").string
  ensure
    eval("$#{stream} = #{stream.upcase}")
  end
  result
end

def create_generated_attribute(attribute_type, name = 'test')


create_generated_attribute(:string, 'name')

attribute type and, optionally, the attribute name:
Create a Rails::Generators::GeneratedAttribute by supplying the 
def create_generated_attribute(attribute_type, name = 'test')
  Rails::Generators::GeneratedAttribute.new(name, attribute_type.to_s)
end

def destination_root_is_set? #:nodoc:

:nodoc: 
def destination_root_is_set? #:nodoc:
  raise "You need to configure your Rails::Generators::TestCase destination root." unless destination_root
end

def ensure_current_path #:nodoc:

:nodoc: 
def ensure_current_path #:nodoc:
  cd current_path
end

def generator(args=self.default_arguments, options={}, config={})

Instantiate the generator. 
def generator(args=self.default_arguments, options={}, config={})
  @generator ||= self.generator_class.new(args, options, config.reverse_merge(:destination_root => destination_root))
end

def migration_file_name(relative) #:nodoc:

:nodoc: 
def migration_file_name(relative) #:nodoc:
  absolute = File.expand_path(relative, destination_root)
  dirname, file_name = File.dirname(absolute), File.basename(absolute).sub(/\.rb$/, '')
  Dir.glob("#{dirname}/[0-9]*_*.rb").grep(/\d+_#{file_name}.rb$/).first
end

def prepare_destination 

def prepare_destination
  rm_rf(destination_root)
  mkdir_p(destination_root)
end

def run_generator(args=self.default_arguments, config={})

printed by the generator.
You can provide a configuration hash as second argument. This method returns the output

end
end
assert_no_file "config/database.yml"
run_generator %w(myapp --skip-active-record)
test "database.yml is not created when skipping Active Record" do

teardown :cleanup_destination_root
destination File.expand_path("../tmp", File.dirname(__FILE__))
tests AppGenerator
class AppGeneratorTest < Rails::Generators::TestCase

command line arguments:
Runs the generator configured for this class. The first argument is an array like 
def run_generator(args=self.default_arguments, config={})
  capture(:stdout) { self.generator_class.start(args, config.reverse_merge(:destination_root => destination_root)) }
end