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require File.expand_path(File.dirname(__FILE__) + '/edgecase')
class AboutScope < EdgeCase::Koan
module Jims
class Dog
def identify
:jims_dog
end
end
end
module Joes
class Dog
def identify
:joes_dog
end
end
end
def test_dog_is_not_available_in_the_current_scope
assert_raise(NameError) do
fido = Dog.new
end
end
def test_you_can_reference_nested_classes_using_the_scope_operator
fido = Jims::Dog.new
rover = Joes::Dog.new
assert_equal :jims_dog, fido.identify
assert_equal :joes_dog, rover.identify
assert_equal true, fido.class != rover.class
assert_equal true, Jims::Dog != Joes::Dog
end
# ------------------------------------------------------------------
class String
end
def test_bare_bones_class_names_assume_the_current_scope
assert_equal true, AboutScope::String == String
end
def test_nested_string_is_not_the_same_as_the_system_string
assert_equal false, String == "HI".class
end
def test_use_the_prefix_scope_operator_to_force_the_global_scope
assert_equal true, ::String == "HI".class
end
# ------------------------------------------------------------------
PI = 3.1416
def test_constants_are_defined_with_an_initial_uppercase_letter
assert_equal 3.1416, PI
end
# ------------------------------------------------------------------
MyString = ::String
def test_class_names_are_just_constants
assert_equal true, MyString == ::String
assert_equal true, MyString == "HI".class
end
def test_constants_can_be_looked_up_explicitly
assert_equal true, PI == AboutScope.const_get("PI")
assert_equal true, MyString == AboutScope.const_get("MyString")
end
def test_you_can_get_a_list_of_constants_for_any_class_or_module
assert_equal [:Dog], Jims.constants
assert Object.constants.size > 3
end
end
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