add tests for rendering hidden inputs for custom type field

Author: woylie

test/polymorphic_embed_test.exs

@@ -1582,7 +1582,7 @@ defmodule PolymorphicEmbedTest do
   end
 
   describe "polymorphic_embed_inputs_for/2" do
-    test "generates forms that can be rendered" do
+    test "generates forms that can be rendered (custom type field/identify_by_fields)" do
       reminder_module = get_module(Reminder, :polymorphic)
 
       attrs = %{
@@ -1606,14 +1606,81 @@ defmodule PolymorphicEmbedTest do
           %{changeset: changeset, field: :channel}
         )
         |> Floki.parse_fragment!()
+        |> dbg()
 
-      assert [input] = Floki.find(html, "#reminder_channel___type__")
+      assert [input] = Floki.find(html, "#reminder_channel_my_type_field")
+      assert Floki.attribute(input, "name") == ["reminder[channel][my_type_field]"]
       assert Floki.attribute(input, "type") == ["hidden"]
       assert Floki.attribute(input, "value") == ["email"]
 
       assert [input] = Floki.find(html, "#reminder_channel_number")
       assert Floki.attribute(input, "type") == ["text"]
     end
+
+    test "generates forms that can be rendered (custom type field)" do
+      reminder_module = get_module(Reminder, :polymorphic)
+
+      attrs = %{
+        date: ~U[2020-05-28 02:57:19Z],
+        text: "This is an Email reminder",
+        channel3: %{
+          my_type_field: "email"
+        }
+      }
+
+      changeset =
+        reminder_module
+        |> struct()
+        |> reminder_module.changeset(attrs)
+
+      html =
+        render_component(
+          &liveview_form/1,
+          %{changeset: changeset, field: :channel3}
+        )
+        |> Floki.parse_fragment!()
+        |> dbg()
+
+      assert [input] = Floki.find(html, "#reminder_channel3_my_type_field")
+      assert Floki.attribute(input, "name") == ["reminder[channel3][my_type_field]"]
+      assert Floki.attribute(input, "type") == ["hidden"]
+      assert Floki.attribute(input, "value") == ["email"]
+    end
+
+    test "generates forms that can be rendered (default type field)" do
+      reminder_module = get_module(Reminder, :polymorphic)
+
+      attrs = %{
+        date: ~U[2020-05-28 02:57:19Z],
+        text: "This is an Email reminder",
+        channel2: %{
+          __type__: "email",
+          address: "a",
+          valid: true,
+          confirmed: true
+        }
+      }
+
+      changeset =
+        reminder_module
+        |> struct()
+        |> reminder_module.changeset(attrs)
+
+      html =
+        render_component(
+          &liveview_form/1,
+          %{changeset: changeset, field: :channel2}
+        )
+        |> Floki.parse_fragment!()
+
+      assert [input] = Floki.find(html, "#reminder_channel2___type__")
+      assert Floki.attribute(input, "name") == ["reminder[channel2][__type__]"]
+      assert Floki.attribute(input, "type") == ["hidden"]
+      assert Floki.attribute(input, "value") == ["email"]
+
+      assert [input] = Floki.find(html, "#reminder_channel2_number")
+      assert Floki.attribute(input, "type") == ["text"]
+    end
   end
 
   test "inputs_for/4" do