1 files changed, 19 insertions, 0 deletions
diff --git a/spec/ruby/core/exception/cause_spec.rb b/spec/ruby/core/exception/cause_spec.rb
new file mode 100644
index 0000000000..a1aa39ae34
--- /dev/null
+++ b/spec/ruby/core/exception/cause_spec.rb
@@ -0,0 +1,19 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Exception#cause" do
+  it "returns the active exception when an exception is raised" do
+    begin
+      raise Exception, "the cause"
+    rescue Exception
+      begin
+        raise RuntimeError, "the consequence"
+      rescue RuntimeError => e
+        e.should be_an_instance_of(RuntimeError)
+        e.message.should == "the consequence"
+
+        e.cause.should be_an_instance_of(Exception)
+        e.cause.message.should == "the cause"
+      end
+    end
+  end
+end