fix: get_from_cookie now correctly handles list return from get_req_header

test/mv_web/live/member_live/index/field_selection_test.exs

@@ -93,7 +93,15 @@ defmodule MvWeb.MemberLive.Index.FieldSelectionTest do
   end
 
   describe "get_from_cookie/1" do
-    test "returns empty map when cookie is missing" do
+    test "returns empty map when cookie header is missing" do
+      conn = %Plug.Conn{}
+
+      result = FieldSelection.get_from_cookie(conn)
+
+      assert result == %{}
+    end
+
+    test "returns empty map when cookie is empty string" do
       conn = Plug.Conn.put_req_header(%Plug.Conn{}, "cookie", "")
 
       result = FieldSelection.get_from_cookie(conn)
@@ -101,6 +109,17 @@ defmodule MvWeb.MemberLive.Index.FieldSelectionTest do
       assert result == %{}
     end
 
+    test "parses valid JSON from cookie" do
+      selection = %{"first_name" => true, "email" => false}
+      cookie_value = selection |> Jason.encode!() |> URI.encode()
+      cookie_header = "member_field_selection=#{cookie_value}"
+      conn = %Plug.Conn{} |> Plug.Conn.put_req_header("cookie", cookie_header)
+
+      result = FieldSelection.get_from_cookie(conn)
+
+      assert result == selection
+    end
+
     test "handles invalid JSON in cookie gracefully" do
       cookie_value = URI.encode("invalid{[")
       cookie_header = "member_field_selection=#{cookie_value}"
@@ -110,6 +129,17 @@ defmodule MvWeb.MemberLive.Index.FieldSelectionTest do
 
       assert result == %{}
     end
+
+    test "handles cookie with other values" do
+      selection = %{"street" => true}
+      cookie_value = selection |> Jason.encode!() |> URI.encode()
+      cookie_header = "other_cookie=value; member_field_selection=#{cookie_value}; another=test"
+      conn = %Plug.Conn{} |> Plug.Conn.put_req_header("cookie", cookie_header)
+
+      result = FieldSelection.get_from_cookie(conn)
+
+      assert result == selection
+    end
   end
 
   describe "save_to_cookie/2" do