1 files changed, 29 insertions, 0 deletions
diff --git a/spec/ruby/core/struct/element_set_spec.rb b/spec/ruby/core/struct/element_set_spec.rb
new file mode 100644
index 0000000000..3d482bdb71
--- /dev/null
+++ b/spec/ruby/core/struct/element_set_spec.rb
@@ -0,0 +1,29 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Struct#[]=" do
+  it "assigns the passed value" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+
+    car[:model] = 'Escape'
+    car[:model].should == 'Escape'
+
+    car['model'] = 'Fusion'
+    car[:model].should == 'Fusion'
+
+    car[1] = 'Excursion'
+    car[:model].should == 'Excursion'
+
+    car[-1] = '2000-2005'
+    car[:year].should == '2000-2005'
+  end
+
+  it "fails when trying to assign attributes which don't exist" do
+    car = StructClasses::Car.new('Ford', 'Ranger')
+
+    lambda { car[:something] = true }.should raise_error(NameError)
+    lambda { car[3] = true          }.should raise_error(IndexError)
+    lambda { car[-4] = true         }.should raise_error(IndexError)
+    lambda { car[Object.new] = true }.should raise_error(TypeError)
+  end
+end