1 files changed, 69 insertions, 0 deletions
diff --git a/spec/ruby/core/exception/exception_spec.rb b/spec/ruby/core/exception/exception_spec.rb
new file mode 100644
index 0000000000..f5424cdabd
--- /dev/null
+++ b/spec/ruby/core/exception/exception_spec.rb
@@ -0,0 +1,69 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/common'
+require_relative 'shared/new'
+
+describe "Exception.exception" do
+  it_behaves_like :exception_new, :exception
+end
+
+describe "Exception#exception" do
+  it "returns self when passed no argument" do
+    e = RuntimeError.new
+    e.should == e.exception
+  end
+
+  it "returns self when passed self as an argument" do
+    e = RuntimeError.new
+    e.should == e.exception(e)
+  end
+
+  it "returns an exception of the same class as self with the message given as argument" do
+    e = RuntimeError.new
+    e2 = e.exception("message")
+    e2.should.instance_of?(RuntimeError)
+    e2.message.should == "message"
+  end
+
+  it "when raised will be rescued as the new exception" do
+    begin
+      begin
+        raised_first = StandardError.new('first')
+        raise raised_first
+      rescue => caught_first
+        raised_second = raised_first.exception('second')
+        raise raised_second
+      end
+    rescue => caught_second
+    end
+
+    raised_first.should == caught_first
+    raised_second.should == caught_second
+  end
+
+  it "captures an exception into $!" do
+    exception = begin
+      raise
+    rescue RuntimeError
+      $!
+    end
+
+    exception.class.should == RuntimeError
+    exception.message.should == ""
+    exception.backtrace.first.should =~ /exception_spec/
+  end
+
+  class CustomArgumentError < StandardError
+    attr_reader :val
+    def initialize(val)
+      @val = val
+    end
+  end
+
+  it "returns an exception of the same class as self with the message given as argument, but without reinitializing" do
+    e = CustomArgumentError.new(:boom)
+    e2 = e.exception("message")
+    e2.should.instance_of?(CustomArgumentError)
+    e2.val.should == :boom
+    e2.message.should == "message"
+  end
+end