Revert "Remove warnings of flip-flop deprecation from tests and specs"

This reverts commit bf7a32d22079cc44eb19794e41d82b886d5d17b3.

flip-flop is no longer deprecated.

[Feature #5400]

2 files changed, 2 insertions, 15 deletions

diff --git a/test/ruby/test_flip.rb b/test/ruby/test_flip.rb
index 9156be0553..9c58f5f497 100644
--- a/test/ruby/test_flip.rb
+++ b/test/ruby/test_flip.rb
@@ -2,16 +2,7 @@
 require 'test/unit'
 
 class TestFlip < Test::Unit::TestCase
-  def setup
-    @verbose_bak, $VERBOSE = $VERBOSE, nil
-  end
-
-  def teardown
-    $VERBOSE = @verbose_bak
-  end
-
   def test_flip_flop
-    eval <<-END
     assert_equal [4,5], (1..9).select {|n| true if (n==4)..(n==5)}
     assert_equal [4,5], (1..9).select {|n| true if (n==4)...(n==5)}
     assert_equal [2], (1..9).select {|n| true if (n==2)..(n%2).zero?}
@@ -19,7 +10,6 @@ class TestFlip < Test::Unit::TestCase
     assert_equal [4,5,7,8], (1..9).select {|n| true if (n==4)...(n==5) or (n==7)...(n==8)}
     assert_equal [nil, 2, 3, 4, nil], (1..5).map {|x| x if (x==2..x==4)}
     assert_equal [1, nil, nil, nil, 5], (1..5).map {|x| x if !(x==2..x==4)}
-    END
   end
 
   def test_hidden_key
@@ -35,14 +25,14 @@ class TestFlip < Test::Unit::TestCase
   def test_shared_eval
     bug7671 = '[ruby-core:51296]'
     vs = (1..9).to_a
-    eval("vs.select {|n| if n==2..n==16 then 1 end}")
+    vs.select {|n| if n==2..n==16 then 1 end}
     v = eval("vs.select {|n| if n==3..n==6 then 1 end}")
     assert_equal([*3..6], v, bug7671)
     vs
   end
 
   def test_shared_thread
-    ff = eval("proc {|n| true if n==3..n==5}")
+    ff = proc {|n| true if n==3..n==5}
     v = 1..9
     a = true
     th = Thread.new {
diff --git a/test/ruby/test_jit.rb b/test/ruby/test_jit.rb
index c9255f20b0..0274f59252 100644
--- a/test/ruby/test_jit.rb
+++ b/test/ruby/test_jit.rb
@@ -112,13 +112,10 @@ class TestJIT < Test::Unit::TestCase
   end
 
   def test_compile_insn_setspecial
-    verbose_bak, $VERBOSE = $VERBOSE, nil
     assert_compile_once("#{<<~"begin;"}\n#{<<~"end;"}", result_inspect: 'true', insns: %i[setspecial])
     begin;
       true if nil.nil?..nil.nil?
     end;
-  ensure
-    $VERBOSE = verbose_bak
   end
 
   def test_compile_insn_instancevariable