Ruby 2.4: take advantage of String#unpack1

https://bugs.ruby-lang.org/issues/12752
https://ruby-doc.org/core-2.4.0/String.html#method-i-unpack1

2 files changed, 5 insertions, 5 deletions

diff --git a/activesupport/lib/active_support/testing/isolation.rb b/activesupport/lib/active_support/testing/isolation.rb
index 562f985f1b..652a10da23 100644
--- a/activesupport/lib/active_support/testing/isolation.rb
+++ b/activesupport/lib/active_support/testing/isolation.rb
@@ -56,7 +56,7 @@ module ActiveSupport
           write.close
           result = read.read
           Process.wait2(pid)
-          result.unpack("m")[0]
+          result.unpack1("m")
         end
       end
 
@@ -98,7 +98,7 @@ module ActiveSupport
                 nil
               end
 
-              return tmpfile.read.unpack("m")[0]
+              return tmpfile.read.unpack1("m")
             end
           end
         end
diff --git a/activesupport/test/key_generator_test.rb b/activesupport/test/key_generator_test.rb
index a948cfbd8e..cdde2c573a 100644
--- a/activesupport/test/key_generator_test.rb
+++ b/activesupport/test/key_generator_test.rb
@@ -36,13 +36,13 @@ else
       # key would break.
 
       expected = "b129376f68f1ecae788d7433310249d65ceec090ecacd4c872a3a9e9ec78e055739be5cc6956345d5ae38e7e1daa66f1de587dc8da2bf9e8b965af4b3918a122"
-      assert_equal expected, ActiveSupport::KeyGenerator.new("0" * 64).generate_key("some_salt").unpack("H*").first
+      assert_equal expected, ActiveSupport::KeyGenerator.new("0" * 64).generate_key("some_salt").unpack1("H*")
 
       expected = "b129376f68f1ecae788d7433310249d65ceec090ecacd4c872a3a9e9ec78e055"
-      assert_equal expected, ActiveSupport::KeyGenerator.new("0" * 64).generate_key("some_salt", 32).unpack("H*").first
+      assert_equal expected, ActiveSupport::KeyGenerator.new("0" * 64).generate_key("some_salt", 32).unpack1("H*")
 
       expected = "cbea7f7f47df705967dc508f4e446fd99e7797b1d70011c6899cd39bbe62907b8508337d678505a7dc8184e037f1003ba3d19fc5d829454668e91d2518692eae"
-      assert_equal expected, ActiveSupport::KeyGenerator.new("0" * 64, iterations: 2).generate_key("some_salt").unpack("H*").first
+      assert_equal expected, ActiveSupport::KeyGenerator.new("0" * 64, iterations: 2).generate_key("some_salt").unpack1("H*")
     end
   end