From 748b21db8ff850378b20a69ccd4215c06abea03e Mon Sep 17 00:00:00 2001
From: David Heinemeier Hansson <david@loudthinking.com>
Date: Thu, 17 Dec 2015 14:28:19 +0100
Subject: Add thread_m/cattr_accessor/reader/writer suite of methods for
 declaring class and module variables that live per-thread

---
 .../module/attribute_accessor_per_thread_test.rb   | 109 +++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 activesupport/test/core_ext/module/attribute_accessor_per_thread_test.rb

(limited to 'activesupport/test/core_ext/module/attribute_accessor_per_thread_test.rb')

diff --git a/activesupport/test/core_ext/module/attribute_accessor_per_thread_test.rb b/activesupport/test/core_ext/module/attribute_accessor_per_thread_test.rb
new file mode 100644
index 0000000000..b8d6c00ff7
--- /dev/null
+++ b/activesupport/test/core_ext/module/attribute_accessor_per_thread_test.rb
@@ -0,0 +1,109 @@
+require 'abstract_unit'
+require 'active_support/core_ext/module/attribute_accessors_per_thread'
+
+class ModuleAttributeAccessorTest < ActiveSupport::TestCase
+  def setup
+    @class = Class.new do
+      thread_mattr_accessor :foo
+      thread_mattr_accessor :bar,  instance_writer: false
+      thread_mattr_reader   :shaq, instance_reader: false
+      thread_mattr_accessor :camp, instance_accessor: false
+    end
+
+    @object = @class.new
+  end
+
+  def test_should_use_mattr_default
+    Thread.new do
+      assert_nil @class.foo
+      assert_nil @object.foo
+    end.join
+  end
+
+  def test_should_set_mattr_value
+    Thread.new do
+      @class.foo = :test
+      assert_equal :test, @class.foo
+
+      @class.foo = :test2
+      assert_equal :test2, @class.foo
+    end.join
+  end
+
+  def test_should_not_create_instance_writer
+    Thread.new do
+      assert_respond_to @class, :foo
+      assert_respond_to @class, :foo=
+      assert_respond_to @object, :bar
+      assert !@object.respond_to?(:bar=)
+    end.join
+  end
+
+  def test_should_not_create_instance_reader
+    Thread.new do
+      assert_respond_to @class, :shaq
+      assert !@object.respond_to?(:shaq)
+    end.join
+  end
+
+  def test_should_not_create_instance_accessors
+    Thread.new do
+      assert_respond_to @class, :camp
+      assert !@object.respond_to?(:camp)
+      assert !@object.respond_to?(:camp=)
+    end.join
+  end
+
+  def test_values_should_not_bleed_between_threads
+    threads = []
+    threads << Thread.new do
+      @class.foo = 'things'
+      sleep 1
+      assert_equal 'things', @class.foo
+    end
+
+    threads << Thread.new do
+      @class.foo = 'other things'
+      sleep 1
+      assert_equal 'other things', @class.foo      
+    end
+    
+    threads << Thread.new do
+      @class.foo = 'really other things'
+      sleep 1
+      assert_equal 'really other things', @class.foo      
+    end
+    
+    threads.each { |t| t.join }
+  end
+
+  def test_should_raise_name_error_if_attribute_name_is_invalid
+    exception = assert_raises NameError do
+      Class.new do
+        thread_cattr_reader "1nvalid"
+      end
+    end
+    assert_equal "invalid attribute name: 1nvalid", exception.message
+
+    exception = assert_raises NameError do
+      Class.new do
+        thread_cattr_writer "1nvalid"
+      end
+    end
+    assert_equal "invalid attribute name: 1nvalid", exception.message
+
+    exception = assert_raises NameError do
+      Class.new do
+        thread_mattr_reader "1valid_part"
+      end
+    end
+    assert_equal "invalid attribute name: 1valid_part", exception.message
+
+    exception = assert_raises NameError do
+      Class.new do
+        thread_mattr_writer "2valid_part"
+      end
+    end
+    assert_equal "invalid attribute name: 2valid_part", exception.message
+  end
+end
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