[ruby/irb] Add test_eval_object_without_inspect_method

https://github.com/ruby/irb/commit/c0d9a26bce

test/irb/test_context.rb

@@ -98,6 +98,23 @@ module TestIRB
       $VERBOSE = verbose
     end
 
+    def test_eval_object_without_inspect_method
+      verbose, $VERBOSE = $VERBOSE, nil
+      input = TestInputMethod.new([
+        "BasicObject.new\n",
+      ])
+      irb = IRB::Irb.new(IRB::WorkSpace.new(Object.new), input)
+      out, err = capture_output do
+        irb.eval_input
+      end
+      assert_empty err
+      assert_pattern_list([:*, /\(Object doesn't support #inspect\)/,
+                           :*, /=> \n/,
+                           /\s*/], out)
+    ensure
+      $VERBOSE = verbose
+    end
+
     def test_default_config
       assert_equal(true, @context.use_colorize?)
     end