67 lines
2.0 KiB
Ruby
67 lines
2.0 KiB
Ruby
# frozen_string_literal: true
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# Used to stud methods for factories where we can't
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# use rspec-mocks.
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#
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# Examples:
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# stub_method(user, :some_method) { |var1, var2| var1 + var2 }
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# stub_method(user, :some_method) { true }
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# stub_method(user, :some_method) => nil
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# stub_method(user, :some_method) do |*args|
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# true
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# end
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#
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# restore_original_method(user, :some_method)
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# restore_original_methods(user)
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#
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module StubMethodCalls
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AlreadyImplementedError = Class.new(StandardError)
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def stub_method(object, method, &block)
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Backup.stub_method(object, method, &block)
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end
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def restore_original_method(object, method)
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Backup.restore_method(object, method)
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end
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def restore_original_methods(object)
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Backup.stubbed_methods(object).each_key { |method, backed_up_method| restore_original_method(object, method) }
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end
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module Backup
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def self.stubbed_methods(object)
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return {} unless object.respond_to?(:_stubbed_methods)
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object._stubbed_methods
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end
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def self.backup_method(object, method)
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backed_up_methods = stubbed_methods(object)
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backed_up_methods[method] = object.respond_to?(method) ? object.method(method) : nil
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object.define_singleton_method(:_stubbed_methods) { backed_up_methods }
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end
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def self.stub_method(object, method, &block)
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raise ArgumentError, "Block is required" unless block_given?
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backup_method(object, method) unless backed_up_method?(object, method)
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object.define_singleton_method(method, &block)
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end
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def self.restore_method(object, method)
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raise NotImplementedError, "#{method} has not been stubbed on #{object}" unless backed_up_method?(object, method)
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object.singleton_class.remove_method(method)
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backed_up_method = stubbed_methods(object)[method]
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object.define_singleton_method(method, backed_up_method) if backed_up_method
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end
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def self.backed_up_method?(object, method)
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stubbed_methods(object).key?(method)
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end
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end
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end
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