2 files changed, 104 insertions, 0 deletions
diff --git a/actionpack/test/controller/parameters/accessors_test.rb b/actionpack/test/controller/parameters/accessors_test.rb
index 2893eb7b91..7725c25e22 100644
--- a/actionpack/test/controller/parameters/accessors_test.rb
+++ b/actionpack/test/controller/parameters/accessors_test.rb
@@ -53,6 +53,15 @@ class ParametersAccessorsTest < ActiveSupport::TestCase
     @params.each_pair { |key, value| assert_not(value.permitted?) if key == "person" }
   end
 
+  test "empty? returns true when params contains no key/value pairs" do
+    params = ActionController::Parameters.new
+    assert params.empty?
+  end
+
+  test "empty? returns false when any params are present" do
+    refute @params.empty?
+  end
+
   test "except retains permitted status" do
     @params.permit!
     assert @params.except(:person).permitted?
@@ -75,6 +84,45 @@ class ParametersAccessorsTest < ActiveSupport::TestCase
     assert_not @params[:person].fetch(:name).permitted?
   end
 
+  test "has_key? returns true if the given key is present in the params" do
+    assert @params.has_key?(:person)
+  end
+
+  test "has_key? returns false if the given key is not present in the params" do
+    refute @params.has_key?(:address)
+  end
+
+  test "has_value? returns true if the given value is present in the params" do
+    params = ActionController::Parameters.new(city: "Chicago", state: "Illinois")
+    assert params.has_value?("Chicago")
+  end
+
+  test "has_value? returns false if the given value is not present in the params" do
+    params = ActionController::Parameters.new(city: "Chicago", state: "Illinois")
+    refute params.has_value?("New York")
+  end
+
+  test "include? returns true if the given key is present in the params" do
+    assert @params.include?(:person)
+  end
+
+  test "include? returns false if the given key is not present in the params" do
+    refute @params.include?(:address)
+  end
+
+  test "key? returns true if the given key is present in the params" do
+    assert @params.key?(:person)
+  end
+
+  test "key? returns false if the given key is not present in the params" do
+    refute @params.key?(:address)
+  end
+
+  test "keys returns an array of the keys of the params" do
+    assert_equal ["person"], @params.keys
+    assert_equal ["age", "name", "addresses"], @params[:person].keys
+  end
+
   test "reject retains permitted status" do
     assert_not @params.reject { |k| k == "person" }.permitted?
   end
@@ -120,6 +168,21 @@ class ParametersAccessorsTest < ActiveSupport::TestCase
     assert_not @params.transform_values { |v| v }.permitted?
   end
 
+  test "value? returns true if the given value is present in the params" do
+    params = ActionController::Parameters.new(city: "Chicago", state: "Illinois")
+    assert params.value?("Chicago")
+  end
+
+  test "value? returns false if the given value is not present in the params" do
+    params = ActionController::Parameters.new(city: "Chicago", state: "Illinois")
+    refute params.value?("New York")
+  end
+
+  test "values returns an array of the values of the params" do
+    params = ActionController::Parameters.new(city: "Chicago", state: "Illinois")
+    assert_equal ["Chicago", "Illinois"], params.values
+  end
+
   test "values_at retains permitted status" do
     @params.permit!
     assert @params.values_at(:person).first.permitted?
diff --git a/actionpack/test/controller/parameters/parameters_permit_test.rb b/actionpack/test/controller/parameters/parameters_permit_test.rb
index 8920914af1..3e067314d6 100644
--- a/actionpack/test/controller/parameters/parameters_permit_test.rb
+++ b/actionpack/test/controller/parameters/parameters_permit_test.rb
@@ -302,6 +302,47 @@ class ParametersPermitTest < ActiveSupport::TestCase
     assert_equal "32", @params[:person][:age]
   end
 
+  test "#reverse_merge with parameters" do
+    default_params = ActionController::Parameters.new(id: "1234", person: {}).permit!
+    merged_params = @params.reverse_merge(default_params)
+
+    assert_equal "1234", merged_params[:id]
+    refute_predicate merged_params[:person], :empty?
+  end
+
+  test "#with_defaults is an alias of reverse_merge" do
+    default_params = ActionController::Parameters.new(id: "1234", person: {}).permit!
+    merged_params = @params.with_defaults(default_params)
+
+    assert_equal "1234", merged_params[:id]
+    refute_predicate merged_params[:person], :empty?
+  end
+
+  test "not permitted is sticky beyond reverse_merge" do
+    refute_predicate @params.reverse_merge(a: "b"), :permitted?
+  end
+
+  test "permitted is sticky beyond reverse_merge" do
+    @params.permit!
+    assert_predicate @params.reverse_merge(a: "b"), :permitted?
+  end
+
+  test "#reverse_merge! with parameters" do
+    default_params = ActionController::Parameters.new(id: "1234", person: {}).permit!
+    @params.reverse_merge!(default_params)
+
+    assert_equal "1234", @params[:id]
+    refute_predicate @params[:person], :empty?
+  end
+
+  test "#with_defaults! is an alias of reverse_merge!" do
+    default_params = ActionController::Parameters.new(id: "1234", person: {}).permit!
+    @params.with_defaults!(default_params)
+
+    assert_equal "1234", @params[:id]
+    refute_predicate @params[:person], :empty?
+  end
+
   test "modifying the parameters" do
     @params[:person][:hometown] = "Chicago"
     @params[:person][:family] = { brother: "Jonas" }