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lib/rspec/sleeping_king_studios/concerns/example_constants.rb
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,107 +1,140 @@ | ||
| # lib/rspec/sleeping_king_studios/concerns/example_constants.rb | ||
| # frozen_string_literal: true | ||
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| require 'rspec/sleeping_king_studios/concerns' | ||
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| module RSpec::SleepingKingStudios::Concerns | ||
| module ExampleConstants | ||
| # Methods for defining example-scoped classes and constants. | ||
| module ExampleConstants # rubocop:disable Metrics/ModuleLength | ||
| DEFAULT_VALUE = Object.new.freeze | ||
| private_constant :DEFAULT_VALUE | ||
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| def self.assign_constant namespace, constant_name, constant_value | ||
| prior_value = DEFAULT_VALUE | ||
| class << self | ||
| # @api private | ||
| def define_class(class_name:, example:, base_class: nil, &block) | ||
| klass = Class.new(resolve_base_class(base_class)) | ||
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| if namespace.const_defined?(constant_name) | ||
| prior_value = namespace.const_get(constant_name) | ||
| end # if | ||
| klass.define_singleton_method(:name) { class_name } | ||
| klass.singleton_class.send(:alias_method, :inspect, :name) | ||
| klass.singleton_class.send(:alias_method, :to_s, :name) | ||
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| namespace.const_set(constant_name, constant_value) | ||
| example.instance_exec(klass, &block) if block_given? | ||
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| yield | ||
| ensure | ||
| if prior_value == DEFAULT_VALUE | ||
| namespace.send :remove_const, constant_name | ||
| else | ||
| namespace.const_set(constant_name, prior_value) | ||
| end # if-else | ||
| end # class method assign_constant | ||
| klass | ||
| end | ||
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| def self.guard_existing_constant! namespace, constant_name | ||
| return unless namespace.const_defined?(constant_name) | ||
| # @api private | ||
| def with_constant( # rubocop:disable Metrics/MethodLength | ||
| constant_name:, | ||
| constant_value:, | ||
| namespace:, | ||
| force: false | ||
| ) | ||
| guard_existing_constant!(namespace, constant_name) unless force | ||
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| message = | ||
| "constant #{constant_name} is already defined with value "\ | ||
| "#{namespace.const_get(constant_name).inspect}" | ||
| prior_value = DEFAULT_VALUE | ||
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| raise NameError, message | ||
| end # class method guard_existing_constant! | ||
| if namespace.const_defined?(constant_name) | ||
| prior_value = namespace.const_get(constant_name) | ||
| end | ||
|
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| def self.resolve_base_class value | ||
| value = value.fetch(:base_class, nil) if value.is_a?(Hash) | ||
| namespace.const_set(constant_name, constant_value) | ||
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| return Object if value.nil? | ||
| yield | ||
| ensure | ||
| if prior_value == DEFAULT_VALUE | ||
| namespace.send :remove_const, constant_name | ||
| else | ||
| namespace.const_set(constant_name, prior_value) | ||
| end | ||
| end | ||
|
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| return Object.const_get(value) if value.is_a?(String) | ||
| # @api private | ||
| def with_namespace(module_names) # rubocop:disable Metrics/MethodLength | ||
| last_defined = nil | ||
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| value | ||
| end | ||
| resolved = | ||
| module_names.reduce(Object) do |namespace, module_name| | ||
| if namespace.const_defined?(module_name) | ||
| next namespace.const_get(module_name) | ||
| end | ||
|
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| def self.resolve_namespace module_names | ||
| last_defined = nil | ||
| last_defined ||= { namespace:, module_name: } | ||
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| resolved = | ||
| module_names.reduce(Object) do |ns, module_name| | ||
| next ns.const_get(module_name) if ns.const_defined?(module_name) | ||
| namespace.const_set(module_name, Module.new) | ||
| end | ||
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| last_defined ||= { :namespace => ns, :module_name => module_name } | ||
| yield resolved | ||
| ensure | ||
| if last_defined | ||
| last_defined[:namespace] | ||
| .send(:remove_const, last_defined[:module_name]) | ||
| end | ||
| end | ||
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| ns.const_set(module_name, Module.new) | ||
| end # reduce | ||
| private | ||
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| yield resolved | ||
| ensure | ||
| if last_defined | ||
| last_defined[:namespace].send(:remove_const, last_defined[:module_name]) | ||
| end # if | ||
| end # class method resolve_namespace | ||
| def guard_existing_constant!(namespace, constant_name) | ||
| return unless namespace.const_defined?(constant_name) | ||
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| def example_class class_name, base_class = nil, &block | ||
| class_name = class_name.to_s if class_name.is_a?(Symbol) | ||
| message = | ||
| "constant #{constant_name} is already defined with value " \ | ||
| "#{namespace.const_get(constant_name).inspect}" | ||
|
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| example_constant(class_name) do | ||
| klass = Class.new(ExampleConstants.resolve_base_class(base_class)) | ||
| raise NameError, message | ||
| end | ||
|
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| klass.define_singleton_method(:name) { class_name } | ||
| klass.singleton_class.send(:alias_method, :inspect, :name) | ||
| klass.singleton_class.send(:alias_method, :to_s, :name) | ||
| def resolve_base_class(value) | ||
| value = value.fetch(:base_class, nil) if value.is_a?(Hash) | ||
|
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| instance_exec(klass, &block) if block_given? | ||
| return Object if value.nil? | ||
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| klass | ||
| end # example_constant | ||
| end # method example_class | ||
| return Object.const_get(value) if value.is_a?(String) | ||
|
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| def example_constant qualified_name, constant_value = DEFAULT_VALUE, force: false, &block | ||
| around(:example) do |wrapped_example| | ||
| example = wrapped_example.example | ||
| value | ||
| end | ||
| end | ||
|
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| def example_class(class_name, base_class = nil, &block) | ||
| class_name = class_name.to_s if class_name.is_a?(Symbol) | ||
|
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| example_constant(class_name) do | ||
| ExampleConstants.define_class( | ||
| base_class:, | ||
| class_name:, | ||
| example: self, | ||
| &block | ||
| ) | ||
| end | ||
| end | ||
|
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| def example_constant( # rubocop:disable Metrics/MethodLength | ||
| qualified_name, | ||
| constant_value = DEFAULT_VALUE, | ||
| force: false, | ||
| &block | ||
| ) | ||
| around(:example) do |wrapped_example| | ||
| resolved_value = | ||
| if constant_value == DEFAULT_VALUE | ||
| block ? example.instance_exec(&block) : nil | ||
| if constant_value == DEFAULT_VALUE && block_given? | ||
| wrapped_example.example.instance_exec(&block) | ||
| else | ||
| constant_value | ||
| end # if | ||
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| module_names = qualified_name.to_s.split('::') | ||
| constant_name = module_names.pop | ||
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| ExampleConstants.resolve_namespace(module_names) do |namespace| | ||
| ExampleConstants.guard_existing_constant!(namespace, constant_name) unless force | ||
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| ExampleConstants.assign_constant(namespace, constant_name, resolved_value) do | ||
| end | ||
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| *module_names, constant_name = qualified_name.to_s.split('::') | ||
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| ExampleConstants.with_namespace(module_names) do |namespace| | ||
| ExampleConstants.with_constant( | ||
| constant_name:, | ||
| constant_value: resolved_value, | ||
| namespace:, | ||
| force: | ||
| ) \ | ||
| do | ||
| wrapped_example.call | ||
| end # assign_constant | ||
| end # resolve_namespace | ||
| end # before example | ||
| end # method example_constant | ||
| end # module | ||
| end # module | ||
| end | ||
| end | ||
| end | ||
| end | ||
| end | ||
| end |
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