eval.c: raise with cause

* eval.c (rb_f_raise): add cause: optional keyword argument.
  [ruby-core:58610] [Feature #8257] [EXPERIMENTAL]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44473 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 14 insertions, 0 deletions

diff --git a/test/ruby/test_exception.rb b/test/ruby/test_exception.rb
index dfa428912e..f15b37f8b9 100644
--- a/test/ruby/test_exception.rb
+++ b/test/ruby/test_exception.rb
@@ -517,4 +517,18 @@ end.join
     }
     assert_not_same(e, e.cause, "#{msg}: should not be recursive")
   end
+
+  def test_raise_with_cause
+    msg = "[Feature #8257]"
+    cause = ArgumentError.new("foobar")
+    e = assert_raise(RuntimeError) {raise msg, cause: cause}
+    assert_same(cause, e.cause)
+  end
+
+  def test_cause_with_no_arguments
+    cause = ArgumentError.new("foobar")
+    assert_raise_with_message(ArgumentError, /with no arguments/) do
+      raise cause: cause
+    end
+  end
 end