test/ruby: assert_raise_with_message

* test/ruby: use assert_raise_with_message

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43224 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 2 deletions

diff --git a/test/ruby/test_array.rb b/test/ruby/test_array.rb
index b4f35af84d..873c49783f 100644
--- a/test/ruby/test_array.rb
+++ b/test/ruby/test_array.rb
@@ -2300,8 +2300,7 @@ class TestArray < Test::Unit::TestCase
     assert_equal([], a.rotate!(13))
     assert_equal([], a.rotate!(-13))
     a = [].freeze
-    e = assert_raise(RuntimeError) {a.rotate!}
-    assert_match(/can't modify frozen/, e.message)
+    assert_raise_with_message(RuntimeError, /can't modify frozen/) {a.rotate!}
     a = [1,2,3]
     assert_raise(ArgumentError) { a.rotate!(1, 1) }
   end