//   describe "changeset/2" {
//     test "validates widths" {
//       map = build(:map, %{
//         user_id: UUID.generate(),
//         map_data: "1,1,1\n1,1,1,1\n1,1,1",
//         tile_data: [
//           TileData {tile_id: Tile.HQ.id(), faction: 1, coord: Coord {x: 0, y: 0}},
//           TileData {tile_id: Tile.HQ.id(), faction: 2, coord: Coord {x: 0, y: 1}}
//         ]
//       })

//       assert Changeset {
//         errors: [
//           map_data: {"widths must match", []}
//         ]
//       } = Engine.Map.changeset(%Engine.Map{}, map)
//     }

    
//     test "populates player count based on properties" {
//       map = build(:map, %{
//         user_id: UUID.generate(),
//         map_data: "#{Tile.HQ.id()}",
//         tile_data: [
//           TileData {tile_id: Tile.HQ.id(), faction: 1, coord: Coord {x: 0, y: 0}},
//           TileData {tile_id: Tile.HQ.id(), faction: 1, coord: Coord {x: 0, y: 0}},
//           TileData {tile_id: Tile.HQ.id(), faction: 2, coord: Coord {x: 0, y: 0}},
//           TileData {tile_id: Tile.HQ.id(), faction: 2, coord: Coord {x: 0, y: 0}}
//         ],
//         unit_data: [
//           UnitMapData {faction: 1, unit_id: UUID.generate(), coord: Coord {x: 0, y: 0}},
//           UnitMapData {faction: 1, unit_id: UUID.generate(), coord: Coord {x: 0, y: 0}},
//           UnitMapData {faction: 3, unit_id: UUID.generate(), coord: Coord {x: 0, y: 0}},
//           UnitMapData {faction: 4, unit_id: UUID.generate(), coord: Coord {x: 0, y: 0}}
//         ]
//       })

//       assert Changeset {
//         changes: %{
//           players: 4
//         }
//       } = Engine.Map.changeset(%Engine.Map{}, map)
//     }

//     test "validates map has at least two primary_hqs, valid" {
//       map = build(:map, %{
//         user_id: UUID.generate(),
//         map_data: "#{Tile.HQ.id()}",
//         tile_data: [
//           TileData {tile_id: Tile.HQ.id(), faction: 1, coord: Coord {x: 0, y: 0}}
//         ]
//       })

//       assert Changeset {
//         errors: [
//           players: {"must have at least two players", []}
//         ]
//       } = Engine.Map.changeset(%Engine.Map{}, map)
//     }

//     test "validates map checks for hqs vs owned properties, invalid" {
//       map = build(:map, %{
//         user_id: UUID.generate(),
//         map_data: "#{Tile.City.id()}",
//         tile_data: [
//           TileData {tile_id: Tile.City.id(), faction: 1, coord: Coord {x: 0, y: 0}},
//           TileData {tile_id: Tile.City.id(), faction: 2, coord: Coord {x: 0, y: 0}}
//         ]
//       })

//       assert Changeset {
//         errors: [
//           players: {"must have at least two players", []}
//         ]
//       } = Engine.Map.changeset(%Engine.Map{}, map)
//     }

//     test "validates map has at least two primary_hqs, invalid" {
//       map = build(:map, %{
//         user_id: UUID.generate(),
//         map_data: "#{Tile.HQ.id()}",
//         tile_data: [
//           TileData {tile_id: Tile.HQ.id(), faction: 1, coord: Coord {x: 0, y: 0}},
//           TileData {tile_id: Tile.HQ.id(), faction: 2, coord: Coord {x: 0, y: 0}}
//         ]
//       })

//       assert Changeset {valid?: true} = Engine.Map.changeset(%Engine.Map{}, map)
//     }

//     test "validates map has at least two secondary_hqs, invalid" {
//       map = build(:map, %{
//         user_id: UUID.generate(),
//         map_data: "#{Tile.Lab.id()}",
//         tile_data: [
//           TileData {tile_id: Tile.Lab.id(), faction: 1, coord: Coord {x: 0, y: 0}}
//         ]
//       })

//       assert Changeset {
//         errors: [
//           players: {"must have at least two players", []}
//         ]
//       } = Engine.Map.changeset(%Engine.Map{}, map)
//     }

//     test "validates map has at least two secondary_hqs, valid" {
//       map = build(:map, %{
//         user_id: UUID.generate(),
//         map_data: "#{Tile.Lab.id()}",
//         tile_data: [
//           TileData {tile_id: Tile.Lab.id(), faction: 1, coord: Coord {x: 0, y: 0}},
//           TileData {tile_id: Tile.Lab.id(), faction: 2, coord: Coord {x: 0, y: 0}}
//         ]
//       })

//       assert Changeset {valid?: true} = Engine.Map.changeset(%Engine.Map{}, map)
//     }

//     test "validates map has at least two differently-owned secondary_hqs, invalid" {
//       map = build(:map, %{
//         user_id: UUID.generate(),
//         map_data: "#{Tile.Lab.id()}",
//         tile_data: [
//           TileData {tile_id: Tile.Lab.id(), faction: 1, coord: Coord {x: 0, y: 0}},
//           TileData {tile_id: Tile.Lab.id(), faction: 1, coord: Coord {x: 0, y: 0}}
//         ]
//       })

//       assert Changeset {
//         errors: [
//           players: {"must have at least two players", []}
//         ]
//       } = Engine.Map.changeset(%Engine.Map{}, map)
//     }

//     test "validates map has at least two mixed hqs, valid" {
//       map = build(:map, %{
//         user_id: UUID.generate(),
//         map_data: "#{Tile.HQ.id()},#{Tile.Lab.id()}",
//         tile_data: [
//           TileData {tile_id: Tile.HQ.id(), faction: 1, coord: Coord {x: 0, y: 0}},
//           TileData {tile_id: Tile.Lab.id(), faction: 2, coord: Coord {x: 1, y: 0}}
//         ]
//       })

//       assert Changeset {valid?: true} = Engine.Map.changeset(%Engine.Map{}, map)
//     }

//     test "validates map has at least two differently owned units, invalid" {
//       map = build(:map, %{
//         user_id: UUID.generate(),
//         tile_data: [],
//         unit_data: [
//           UnitMapData {faction: 1, unit_id: UUID.generate(), coord: Coord {x: 0, y: 0}},
//           UnitMapData {faction: 1, unit_id: UUID.generate(), coord: Coord {x: 0, y: 0}}
//         ]
//       })

//       assert Changeset {
//         errors: [
//           players: {"must have at least two players", []}
//         ]
//       } = Engine.Map.changeset(%Engine.Map{}, map)
//     }

//     test "validates map has at least two differently owned units, valid" {
//       map = build(:map, %{
//         user_id: UUID.generate(),
//         map_data: "#{Tile.Lab.id()}",
//         tile_data: [
//           TileData {tile_id: Tile.Lab.id(), faction: 1, coord: Coord {x: 0, y: 0}},
//           TileData {tile_id: Tile.Lab.id(), faction: 1, coord: Coord {x: 0, y: 0}}
//         ]
//       })

//       assert Changeset {
//         errors: [
//           players: {"must have at least two players", []}
//         ]
//       } = Engine.Map.changeset(%Engine.Map{}, map)
//     }

//     test "validates map has at least two differently owned entities, valid" {
//       map = build(:map, %{
//         user_id: UUID.generate(),
//         map_data: "#{Tile.Lab.id()}",
//         tile_data: [
//           TileData {tile_id: Tile.Lab.id(), faction: 1, coord: Coord {x: 0, y: 0}}
//         ],
//         unit_data: [
//           UnitMapData {faction: 2, unit_id: UUID.generate(), coord: Coord {x: 0, y: 0}}
//         ]
//       })

//       assert Changeset {valid?: true} = Engine.Map.changeset(%Engine.Map{}, map)
//     }
//   }
// }