assertions.rb: last match in assert_raise_with_message

* lib/test/unit/assertions.rb (assert_raise_with_message): set
  caller's last match if expected is a Regexp.

* test/ruby/test_arity.rb (err_mess): use assert_raise_with_message.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44172 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 2 deletions

diff --git a/lib/test/unit/assertions.rb b/lib/test/unit/assertions.rb
index 7da0c4e1eb..042adba6fd 100644
--- a/lib/test/unit/assertions.rb
+++ b/lib/test/unit/assertions.rb
@@ -88,7 +88,7 @@ module Test
       #    assert_raise_with_message(RuntimeError, "foo") do
       #      raise "foo" #Raises RuntimeError with the message, so assertion succeeds
       #    end
-      def assert_raise_with_message(exception, expected, msg = nil)
+      def assert_raise_with_message(exception, expected, msg = nil, &block)
         case expected
         when String
           assert = :assert_equal
@@ -100,7 +100,14 @@ module Test
 
         ex = assert_raise(exception, *msg) {yield}
         msg = message(msg, "") {"Expected Exception(#{exception}) was raised, but the message doesn't match"}
-        __send__(assert, expected, ex.message, msg)
+
+        if assert == :assert_equal
+          assert_equal(expected, ex.message, msg)
+        else
+          msg = message(msg) { "Expected #{mu_pp expected} to match #{mu_pp ex.message}" }
+          assert expected =~ ex.message, msg
+          block.binding.eval("proc{|_|$~=_}").call($~)
+        end
         ex
       end