80 lines
1.8 KiB
Ruby
80 lines
1.8 KiB
Ruby
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require File.expand_path(File.dirname(__FILE__) + '/neo')
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class AboutScope < Neo::Koan
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module Jims
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class Dog
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def identify
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:jims_dog
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end
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end
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end
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module Joes
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class Dog
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def identify
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:joes_dog
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end
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end
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end
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def test_dog_is_not_available_in_the_current_scope
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assert_raise(___) do
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Dog.new
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end
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end
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def test_you_can_reference_nested_classes_using_the_scope_operator
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fido = Jims::Dog.new
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rover = Joes::Dog.new
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assert_equal __, fido.identify
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assert_equal __, rover.identify
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assert_equal __, fido.class != rover.class
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assert_equal __, Jims::Dog != Joes::Dog
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end
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# ------------------------------------------------------------------
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class String
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end
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def test_bare_bones_class_names_assume_the_current_scope
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assert_equal __, AboutScope::String == String
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end
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def test_nested_string_is_not_the_same_as_the_system_string
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assert_equal __, String == "HI".class
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end
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def test_use_the_prefix_scope_operator_to_force_the_global_scope
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assert_equal __, ::String == "HI".class
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end
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# ------------------------------------------------------------------
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PI = 3.1416
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def test_constants_are_defined_with_an_initial_uppercase_letter
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assert_equal __, PI
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end
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# ------------------------------------------------------------------
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MyString = ::String
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def test_class_names_are_just_constants
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assert_equal __, MyString == ::String
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assert_equal __, MyString == "HI".class
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end
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def test_constants_can_be_looked_up_explicitly
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assert_equal __, PI == AboutScope.const_get("PI")
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assert_equal __, MyString == AboutScope.const_get("MyString")
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end
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def test_you_can_get_a_list_of_constants_for_any_class_or_module
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assert_equal __, Jims.constants
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assert Object.constants.size > _n_
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end
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end
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