1 files changed, 36 insertions, 2 deletions
diff --git a/activesupport/test/core_ext/string_ext_test.rb b/activesupport/test/core_ext/string_ext_test.rb
index 9cc7bb1a77..2e69816364 100644
--- a/activesupport/test/core_ext/string_ext_test.rb
+++ b/activesupport/test/core_ext/string_ext_test.rb
@@ -143,15 +143,49 @@ class StringInflectionsTest < ActiveSupport::TestCase
     end
   end
 
+  def test_string_parameterized_normal_preserve_case
+    StringToParameterizedPreserveCase.each do |normal, slugged|
+      assert_equal(normal.parameterize(preserve_case: true), slugged)
+    end
+  end
+
   def test_string_parameterized_no_separator
     StringToParameterizeWithNoSeparator.each do |normal, slugged|
-      assert_equal(normal.parameterize(''), slugged)
+      assert_equal(normal.parameterize(separator: ''), slugged)
+    end
+  end
+
+  def test_string_parameterized_no_separator_deprecated
+    StringToParameterizeWithNoSeparator.each do |normal, slugged|
+      assert_deprecated(/Passing the separator argument as a positional parameter is deprecated and will soon be removed. Use `separator: ''` instead./i) do
+        assert_equal(normal.parameterize(''), slugged)
+      end
+    end
+  end
+
+  def test_string_parameterized_no_separator_preserve_case
+    StringToParameterizePreserveCaseWithNoSeparator.each do |normal, slugged|
+      assert_equal(normal.parameterize(separator: '', preserve_case: true), slugged)
     end
   end
 
   def test_string_parameterized_underscore
     StringToParameterizeWithUnderscore.each do |normal, slugged|
-      assert_equal(normal.parameterize('_'), slugged)
+      assert_equal(normal.parameterize(separator: '_'), slugged)
+    end
+  end
+
+  def test_string_parameterized_underscore_deprecated
+    StringToParameterizeWithUnderscore.each do |normal, slugged|
+      assert_deprecated(/Passing the separator argument as a positional parameter is deprecated and will soon be removed. Use `separator: '_'` instead./i) do
+        assert_equal(normal.parameterize('_'), slugged)
+      end
+    end
+  end
+
+  def test_string_parameterized_underscore_preserve_case
+    StringToParameterizePreserceCaseWithUnderscore.each do |normal, slugged|
+      assert_equal(normal.parameterize(separator: '_', preserve_case: true), slugged)
     end
   end