1 files changed, 11 insertions, 12 deletions
diff --git a/actionpack/test/controller/parameters/serialization_test.rb b/actionpack/test/controller/parameters/serialization_test.rb
index 4fb1564c68..7708c8e4fe 100644
--- a/actionpack/test/controller/parameters/serialization_test.rb
+++ b/actionpack/test/controller/parameters/serialization_test.rb
@@ -1,6 +1,7 @@
+# frozen_string_literal: true
+
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
-require "active_support/core_ext/string/strip"
 
 class ParametersSerializationTest < ActiveSupport::TestCase
   setup do
@@ -14,12 +15,10 @@ class ParametersSerializationTest < ActiveSupport::TestCase
 
   test "yaml serialization" do
     params = ActionController::Parameters.new(key: :value)
-    assert_equal <<-end_of_yaml.strip_heredoc, YAML.dump(params)
-      --- !ruby/object:ActionController::Parameters
-      parameters: !ruby/hash:ActiveSupport::HashWithIndifferentAccess
-        key: :value
-      permitted: false
-    end_of_yaml
+    yaml_dump = YAML.dump(params)
+    assert_match("--- !ruby/object:ActionController::Parameters", yaml_dump)
+    assert_match(/parameters: !ruby\/hash:ActiveSupport::HashWithIndifferentAccess\n\s+key: :value/, yaml_dump)
+    assert_match("permitted: false", yaml_dump)
   end
 
   test "yaml deserialization" do
@@ -27,21 +26,21 @@ class ParametersSerializationTest < ActiveSupport::TestCase
     roundtripped = YAML.load(YAML.dump(params))
 
     assert_equal params, roundtripped
-    assert_not roundtripped.permitted?
+    assert_not_predicate roundtripped, :permitted?
   end
 
   test "yaml backwardscompatible with psych 2.0.8 format" do
-    params = YAML.load <<-end_of_yaml.strip_heredoc
+    params = YAML.load <<~end_of_yaml
       --- !ruby/hash:ActionController::Parameters
       key: :value
     end_of_yaml
 
     assert_equal :value, params[:key]
-    assert_not params.permitted?
+    assert_not_predicate params, :permitted?
   end
 
   test "yaml backwardscompatible with psych 2.0.9+ format" do
-    params = YAML.load(<<-end_of_yaml.strip_heredoc)
+    params = YAML.load(<<~end_of_yaml)
       --- !ruby/hash-with-ivars:ActionController::Parameters
       elements:
         key: :value
@@ -50,6 +49,6 @@ class ParametersSerializationTest < ActiveSupport::TestCase
     end_of_yaml
 
     assert_equal :value, params[:key]
-    assert_not params.permitted?
+    assert_not_predicate params, :permitted?
   end
 end