Revert "make TestCaseTest work for pre-1.9 rubies, too"

This reverts commit 79380395.

activesupport/test/test_case_test.rb

@@ -2,8 +2,6 @@
 
 module ActiveSupport
   class TestCaseTest < ActiveSupport::TestCase
-    IS_MINITEST = defined?(MiniTest::Assertions) && TestCase < MiniTest::Assertions 
-
     class FakeRunner
       attr_reader :puked
 
@@ -14,23 +12,9 @@ def initialize
       def puke(klass, name, e)
         @puked << [klass, name, e]
       end
-
-      unless IS_MINITEST
-        def add_error(e)
-          puke(nil, nil, e)
-        end
-
-        def add_run
-        end
-
-        def add_assertion
-        end
-
-        def add_failure(msg, locations=nil)
-        end
-      end
     end
 
+    if defined?(MiniTest::Assertions) && TestCase < MiniTest::Assertions
       def test_callback_with_exception
         tc = Class.new(TestCase) do
           setup :bad_callback
@@ -42,15 +26,12 @@ def test_true; assert true end
         fr = FakeRunner.new
 
         test = tc.new test_name
-      test.run(fr) {}
+        test.run fr
         klass, name, exception = *fr.puked.first
 
-      if IS_MINITEST
         assert_equal tc, klass
         assert_equal test_name, name
-      end
-
-      assert_match %r{oh noes}, exception.message
+        assert_equal 'oh noes', exception.message
       end
 
       def test_teardown_callback_with_exception
@@ -64,15 +45,13 @@ def test_true; assert true end
         fr = FakeRunner.new
 
         test = tc.new test_name
-      test.run(fr) {}
+        test.run fr
         klass, name, exception = *fr.puked.first
 
-      if IS_MINITEST
         assert_equal tc, klass
         assert_equal test_name, name
+        assert_equal 'oh noes', exception.message
       end
-
-      assert_match %r{oh noes}, exception.message
     end
   end
 end