1 files changed, 141 insertions, 0 deletions
diff --git a/activesupport/test/class_inheritable_attributes_test.rb b/activesupport/test/class_inheritable_attributes_test.rb
new file mode 100644
index 0000000000..5bba208e11
--- /dev/null
+++ b/activesupport/test/class_inheritable_attributes_test.rb
@@ -0,0 +1,141 @@
+require 'test/unit'
+require File.dirname(__FILE__) + '/../lib/class_inheritable_attributes'
+
+class ClassInheritableAttributesTest < Test::Unit::TestCase
+  def setup
+    @klass = Class.new
+  end
+
+  def test_reader_declaration
+    assert_nothing_raised do
+      @klass.class_inheritable_reader :a
+      assert_respond_to @klass, :a
+      assert_respond_to @klass.new, :a
+    end
+  end
+
+  def test_writer_declaration
+    assert_nothing_raised do
+      @klass.class_inheritable_writer :a
+      assert_respond_to @klass, :a=
+      assert_respond_to @klass.new, :a=
+    end
+  end
+
+  def test_accessor_declaration
+    assert_nothing_raised do
+      @klass.class_inheritable_accessor :a
+      assert_respond_to @klass, :a
+      assert_respond_to @klass.new, :a
+      assert_respond_to @klass, :a=
+      assert_respond_to @klass.new, :a=
+    end
+  end
+
+  def test_array_declaration
+    assert_nothing_raised do
+      @klass.class_inheritable_array :a
+      assert_respond_to @klass, :a
+      assert_respond_to @klass.new, :a
+      assert_respond_to @klass, :a=
+      assert_respond_to @klass.new, :a=
+    end
+  end
+
+  def test_hash_declaration
+    assert_nothing_raised do
+      @klass.class_inheritable_hash :a
+      assert_respond_to @klass, :a
+      assert_respond_to @klass.new, :a
+      assert_respond_to @klass, :a=
+      assert_respond_to @klass.new, :a=
+    end
+  end
+
+  def test_reader
+    @klass.class_inheritable_reader :a
+    assert_nil @klass.a
+    assert_nil @klass.new.a
+
+    @klass.send(:write_inheritable_attribute, :a, 'a')
+
+    assert_equal 'a', @klass.a
+    assert_equal 'a', @klass.new.a
+    assert_equal @klass.a, @klass.new.a
+    assert_equal @klass.a.id, @klass.new.a.id
+  end
+
+  def test_writer
+    @klass.class_inheritable_reader :a
+    @klass.class_inheritable_writer :a
+
+    assert_nil @klass.a
+    assert_nil @klass.new.a
+
+    @klass.a = 'a'
+    assert_equal 'a', @klass.a
+    @klass.new.a = 'A'
+    assert_equal 'A', @klass.a
+  end
+
+  def test_array
+    @klass.class_inheritable_array :a
+
+    assert_nil @klass.a
+    assert_nil @klass.new.a
+
+    @klass.a = %w(a b c)
+    assert_equal %w(a b c), @klass.a
+    assert_equal %w(a b c), @klass.new.a
+
+    @klass.new.a = %w(A B C)
+    assert_equal %w(a b c A B C), @klass.a
+    assert_equal %w(a b c A B C), @klass.new.a
+  end
+
+  def test_hash
+    @klass.class_inheritable_hash :a
+
+    assert_nil @klass.a
+    assert_nil @klass.new.a
+
+    @klass.a = { :a => 'a' }
+    assert_equal({ :a => 'a' }, @klass.a)
+    assert_equal({ :a => 'a' }, @klass.new.a)
+
+    @klass.new.a = { :b => 'b' }
+    assert_equal({ :a => 'a', :b => 'b' }, @klass.a)
+    assert_equal({ :a => 'a', :b => 'b' }, @klass.new.a)
+  end
+
+  def test_inheritance
+    @klass.class_inheritable_accessor :a
+    @klass.a = 'a'
+
+    @sub = eval("class FlogMe < @klass; end; FlogMe")
+
+    @klass.class_inheritable_accessor :b
+
+    assert_respond_to @sub, :a
+    assert_respond_to @sub, :b
+    assert_equal @klass.a, @sub.a
+    assert_equal @klass.b, @sub.b
+    assert_equal 'a', @sub.a
+    assert_nil @sub.b
+
+    @klass.b = 'b'
+    assert_not_equal @klass.b, @sub.b
+    assert_equal 'b', @klass.b
+    assert_nil @sub.b
+
+    @sub.a = 'A'
+    assert_not_equal @klass.a, @sub.a
+    assert_equal 'a', @klass.a
+    assert_equal 'A', @sub.a
+
+    @sub.b = 'B'
+    assert_not_equal @klass.b, @sub.b
+    assert_equal 'b', @klass.b
+    assert_equal 'B', @sub.b
+  end
+end