1 files changed, 73 insertions, 0 deletions
diff --git a/actionpack/test/controller/parameters/parameters_permit_test.rb b/actionpack/test/controller/parameters/parameters_permit_test.rb
new file mode 100644
index 0000000000..7fe8e6051b
--- /dev/null
+++ b/actionpack/test/controller/parameters/parameters_permit_test.rb
@@ -0,0 +1,73 @@
+require 'abstract_unit'
+require 'action_controller/metal/strong_parameters'
+
+class ParametersPermitTest < ActiveSupport::TestCase
+  setup do
+    @params = ActionController::Parameters.new({ person: { 
+      age: "32", name: { first: "David", last: "Heinemeier Hansson" }
+    }})
+  end
+
+  test "fetch raises ParameterMissing exception" do
+    e = assert_raises(ActionController::ParameterMissing) do
+      @params.fetch :foo
+    end
+    assert_equal :foo, e.param
+  end
+
+  test "fetch doesnt raise ParameterMissing exception if there is a default" do
+    assert_equal "monkey", @params.fetch(:foo, "monkey")
+    assert_equal "monkey", @params.fetch(:foo) { "monkey" }
+  end
+
+  test "permitted is sticky on accessors" do
+    assert !@params.slice(:person).permitted?
+    assert !@params[:person][:name].permitted?
+
+    @params.each { |key, value| assert(value.permitted?) if key == :person }
+
+    assert !@params.fetch(:person).permitted?
+
+    assert !@params.values_at(:person).first.permitted?
+  end
+
+  test "permitted is sticky on mutators" do
+    assert !@params.delete_if { |k| k == :person }.permitted?
+    assert !@params.keep_if { |k,v| k == :person }.permitted?
+  end
+
+  test "permitted is sticky beyond merges" do
+    assert !@params.merge(a: "b").permitted?
+  end
+
+  test "modifying the parameters" do
+    @params[:person][:hometown] = "Chicago"
+    @params[:person][:family] = { brother: "Jonas" }
+
+    assert_equal "Chicago", @params[:person][:hometown]
+    assert_equal "Jonas", @params[:person][:family][:brother]
+  end
+
+  test "permitting parameters that are not there should not include the keys" do
+    assert !@params.permit(:person, :funky).has_key?(:funky)
+  end
+
+  test "permit state is kept on a dup" do
+    @params.permit!
+    assert_equal @params.permitted?, @params.dup.permitted?
+  end
+
+  test "permitted takes a default value when Parameters.permit_all_parameters is set" do
+    begin
+      ActionController::Parameters.permit_all_parameters = true
+      params = ActionController::Parameters.new({ person: {
+        age: "32", name: { first: "David", last: "Heinemeier Hansson" }
+      }})
+
+      assert params.slice(:person).permitted?
+      assert params[:person][:name].permitted?
+    ensure
+      ActionController::Parameters.permit_all_parameters = false
+    end
+  end
+end