Assert that resizing arrays will re-embed them

test/ruby/test_gc_compact.rb

@@ -311,7 +311,7 @@ class TestGCCompact < Test::Unit::TestCase
   def test_moving_arrays_down_size_pools
     omit if GC::INTERNAL_CONSTANTS[:SIZE_POOL_COUNT] == 1
 
-    assert_separately([], "#{<<~"begin;"}\n#{<<~"end;"}", timeout: 10, signal: :SEGV)
+    assert_separately(%w[-robjspace], "#{<<~"begin;"}\n#{<<~"end;"}", timeout: 10, signal: :SEGV)
     begin;
       ARY_COUNT = 500
 
@@ -324,14 +324,14 @@ class TestGCCompact < Test::Unit::TestCase
 
       stats = GC.verify_compaction_references(expand_heap: true, toward: :empty)
       assert_operator(stats.dig(:moved_down, :T_ARRAY) || 0, :>=, ARY_COUNT)
-      assert(arys) # warning: assigned but unused variable - arys
+      assert_include(ObjectSpace.dump(arys[0]), '"embedded":true')
     end;
   end
 
   def test_moving_arrays_up_size_pools
     omit if GC::INTERNAL_CONSTANTS[:SIZE_POOL_COUNT] == 1
 
-    assert_separately([], "#{<<~"begin;"}\n#{<<~"end;"}", timeout: 10, signal: :SEGV)
+    assert_separately(%w[-robjspace], "#{<<~"begin;"}\n#{<<~"end;"}", timeout: 10, signal: :SEGV)
     begin;
       ARY_COUNT = 500
 
@@ -346,7 +346,7 @@ class TestGCCompact < Test::Unit::TestCase
 
       stats = GC.verify_compaction_references(expand_heap: true, toward: :empty)
       assert_operator(stats.dig(:moved_up, :T_ARRAY) || 0, :>=, ARY_COUNT)
-      assert(arys) # warning: assigned but unused variable - arys
+      assert_include(ObjectSpace.dump(arys[0]), '"embedded":true')
     end;
   end