Add tests for exotic rescued error capturing

language/fixtures/rescue.rb

@@ -1,4 +1,110 @@
 module RescueSpecs
+  class Captor
+    attr_accessor :captured_error
+
+    def self.should_capture_exception
+      captor = new
+      captor.capture('some text').should == :caught # Ensure rescue body still runs
+      captor.captured_error.message.should == 'some text'
+    end
+  end
+
+  class ClassVariableCaptor < Captor
+    def capture(msg)
+      raise msg
+    rescue => @@captured_error
+      :caught
+    end
+
+    def captured_error
+      self.class.remove_class_variable(:@@captured_error)
+    end
+  end
+
+  class ConstantCaptor < Captor
+    # Using lambda gets around the dynamic constant assignment warning
+    CAPTURE = -> msg {
+      begin
+        raise msg
+      rescue => CapturedError
+        :caught
+      end
+    }
+
+    def capture(msg)
+      CAPTURE.call(msg)
+    end
+
+    def captured_error
+      self.class.send(:remove_const, :CapturedError)
+    end
+  end
+
+  class GlobalVariableCaptor < Captor
+    def capture(msg)
+      raise msg
+    rescue => $captured_error
+      :caught
+    end
+
+    def captured_error
+      $captured_error.tap do
+        $captured_error = nil # Can't remove globals, only nil them out
+      end
+    end
+  end
+
+  class InstanceVariableCaptor < Captor
+    def capture(msg)
+      raise msg
+    rescue => @captured_error
+      :caught
+    end
+  end
+
+  class LocalVariableCaptor < Captor
+    def capture(msg)
+      raise msg
+    rescue => captured_error
+      @captured_error = captured_error
+      :caught
+    end
+  end
+
+  class SafeNavigationSetterCaptor < Captor
+    def capture(msg)
+      raise msg
+    rescue => self&.captured_error
+      :caught
+    end
+  end
+
+  class SetterCaptor < Captor
+    def capture(msg)
+      raise msg
+    rescue => self.captured_error
+      :caught
+    end
+  end
+
+  class SquareBracketsCaptor < Captor
+    def capture(msg)
+      @hash = {}
+
+      raise msg
+    rescue => self[:error]
+      :caught
+    end
+
+    def []=(key, value)
+      @hash[key] = value
+    end
+
+    def captured_error
+      @hash[:error]
+    end
+  end
+
   def self.begin_else(raise_exception)
     begin
       ScratchPad << :one

language/rescue_spec.rb

@@ -23,11 +23,37 @@ class ArbitraryException < StandardError
     end.should == :caught
   end
 
-  it "can capture the raised exception in a local variable" do
-    begin
-      raise SpecificExampleException, "some text"
-    rescue SpecificExampleException => e
-      e.message.should == "some text"
+  describe 'can capture the raised exception' do
+    it 'in a local variable' do
+      RescueSpecs::LocalVariableCaptor.should_capture_exception
+    end
+
+    it 'in a class variable' do
+      RescueSpecs::ClassVariableCaptor.should_capture_exception
+    end
+
+    it 'in a constant' do
+      RescueSpecs::ConstantCaptor.should_capture_exception
+    end
+
+    it 'in a global variable' do
+      RescueSpecs::GlobalVariableCaptor.should_capture_exception
+    end
+
+    it 'in an instance variable' do
+      RescueSpecs::InstanceVariableCaptor.should_capture_exception
+    end
+
+    it 'using a safely navigated setter method' do
+      RescueSpecs::SafeNavigationSetterCaptor.should_capture_exception
+    end
+
+    it 'using a setter method' do
+      RescueSpecs::SetterCaptor.should_capture_exception
+    end
+
+    it 'using a square brackets setter' do
+      RescueSpecs::SquareBracketsCaptor.should_capture_exception
     end
   end