diff options
Diffstat (limited to 'activesupport/test/core_ext/module_test.rb')
-rw-r--r-- | activesupport/test/core_ext/module_test.rb | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/module_test.rb b/activesupport/test/core_ext/module_test.rb index 9a8582075d..8872611fb1 100644 --- a/activesupport/test/core_ext/module_test.rb +++ b/activesupport/test/core_ext/module_test.rb @@ -82,6 +82,21 @@ class Name end end +class SideEffect + attr_reader :ints + + delegate :to_i, :to => :shift, :allow_nil => true + delegate :to_s, :to => :shift + + def initialize + @ints = [1, 2, 3] + end + + def shift + @ints.shift + end +end + class ModuleTest < ActiveSupport::TestCase def setup @david = Someone.new("David", Somewhere.new("Paulina", "Chicago")) @@ -171,6 +186,12 @@ class ModuleTest < ActiveSupport::TestCase assert_nil rails.name end + # Ensures with check for nil, not for a falseish target. + def test_delegation_with_allow_nil_and_false_value + project = Project.new(false, false) + assert_raise(NoMethodError) { project.name } + end + def test_delegation_with_allow_nil_and_invalid_value rails = Project.new("Rails", "David") assert_raise(NoMethodError) { rails.name } @@ -233,6 +254,16 @@ class ModuleTest < ActiveSupport::TestCase "[#{e.backtrace.inspect}] did not include [#{file_and_line}]" end + def test_delegation_invokes_the_target_exactly_once + se = SideEffect.new + + assert_equal 1, se.to_i + assert_equal [2, 3], se.ints + + assert_equal '2', se.to_s + assert_equal [3], se.ints + end + def test_parent assert_equal Yz::Zy, Yz::Zy::Cd.parent assert_equal Yz, Yz::Zy.parent |