Merge pull request rails#44501 from ghousemohamed/fix-inconsistency-in-activemodel-testcases

Fixed inconsistencies in ActiveModel test cases

Author: rafaelfranca

activemodel/test/cases/api_test.rb

@@ -58,7 +58,7 @@ def test_initialize_with_nil_or_empty_hash_params_does_not_explode
 
   def test_persisted_is_always_false
     object = BasicModel.new(attr: "value")
-    assert object.persisted? == false
+    assert_not object.persisted?
   end
 
   def test_mixin_inclusion_chain

activemodel/test/cases/error_test.rb

@@ -214,7 +214,7 @@ def test_initialize
     person = Person.new
     error = ActiveModel::Error.new(person, :name, foo: :bar)
 
-    assert error != person
+    assert_not_equal error, person
   end
 
   # details

activemodel/test/cases/model_test.rb

@@ -58,7 +58,7 @@ def test_initialize_with_nil_or_empty_hash_params_does_not_explode
 
   def test_persisted_is_always_false
     object = BasicModel.new(attr: "value")
-    assert object.persisted? == false
+    assert_not object.persisted?
   end
 
   def test_mixin_inclusion_chain