Add in-tree mspec and ruby/spec

* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
  These files can therefore be updated like any other file in MRI.
  Instructions are provided in spec/README.
  [Feature #13156] [ruby-core:79246]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 83 insertions, 0 deletions

diff --git a/spec/rubyspec/core/exception/exception_spec.rb b/spec/rubyspec/core/exception/exception_spec.rb
new file mode 100644
index 0000000000..afa482b9d7
--- /dev/null
+++ b/spec/rubyspec/core/exception/exception_spec.rb
@@ -0,0 +1,83 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/common', __FILE__)
+require File.expand_path('../shared/new', __FILE__)
+
+describe "Exception.exception" do
+  it_behaves_like(:exception_new, :exception)
+end
+
+describe "Exception" do
+  it "is a Class" do
+    Exception.should be_kind_of(Class)
+  end
+
+  it "is a superclass of NoMemoryError" do
+    Exception.should be_ancestor_of(NoMemoryError)
+  end
+
+  it "is a superclass of ScriptError" do
+    Exception.should be_ancestor_of(ScriptError)
+  end
+
+  it "is a superclass of SignalException" do
+    Exception.should be_ancestor_of(SignalException)
+  end
+
+  it "is a superclass of Interrupt" do
+    SignalException.should be_ancestor_of(Interrupt)
+  end
+
+  it "is a superclass of StandardError" do
+    Exception.should be_ancestor_of(StandardError)
+  end
+
+  it "is a superclass of SystemExit" do
+    Exception.should be_ancestor_of(SystemExit)
+  end
+
+  it "is a superclass of SystemStackError" do
+    Exception.should be_ancestor_of(SystemStackError)
+  end
+
+  it "is a superclass of SecurityError" do
+    Exception.should be_ancestor_of(SecurityError)
+  end
+
+  it "is a superclass of EncodingError" do
+    Exception.should be_ancestor_of(EncodingError)
+  end
+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 be_an_instance_of(RuntimeError)
+    e2.message.should == "message"
+  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 be_an_instance_of(CustomArgumentError)
+    e2.val.should == :boom
+    e2.message.should == "message"
+  end
+end