Battle-for-Tismo/tests/data_test.js

import { TestCase } from "./framework/test_case.js";
import {
  CIVILISATIONS,
  PROTO_UNITS,
  BUILDINGS,
  GOVERNMENTS,
  TECHNOLOGIES,
  TRAINABLE_UNIT_IDS,
  TERRAIN_TILES,
  protoUnitById,
  buildingById,
  governmentById,
  technologyById,
  effectValue,
  statusById,
  STATUS_BATTLE,
  PILLAGE,
  pillageSteps,
  POLICIES,
  RESOURCE_BUILDINGS,
} from "../shared/data.js";

export class DataTest extends TestCase {
  test_lookups_return_the_matching_entry() {
    this.assertEqual(protoUnitById("modern_infantry"), PROTO_UNITS.find((u) => u.id === "modern_infantry"));
    this.assertEqual(buildingById("barracks"), BUILDINGS.find((b) => b.id === "barracks"));
    this.assertEqual(governmentById("republic"), GOVERNMENTS[0]);
    this.assertEqual(technologyById("scientific_method"), TECHNOLOGIES[0]);
  }

  test_resource_building_output_is_scaled_up() {
    // One work stands for a whole industry: the authored output is multiplied
    // tenfold so fewer of them stand on the map.
    const mill = RESOURCE_BUILDINGS.find((b) => b.id === "steel_mill");
    this.assertApprox(mill.outputPerDay, 20_000, 1e-6);
  }

  test_unknown_lookups_return_null() {
    this.assertNull(protoUnitById("nope"));
    this.assertNull(buildingById("nope"));
    this.assertNull(governmentById("nope"));
    this.assertNull(technologyById("nope"));
  }

  test_every_civilisation_is_well_formed() {
    this.assertGreaterOrEqual(CIVILISATIONS.length, 2);
    for (const civ of CIVILISATIONS) {
      this.assertTrue(civ.id.length > 0, "id");
      this.assertTrue(civ.name.length > 0, "name");
      this.assertTrue(civ.primaryColour.startsWith("#"), `primary colour of ${civ.id}`);
      this.assertTrue(civ.flag.endsWith(".png"), `flag of ${civ.id}`);
      this.assertTrue(civ.demonym.length > 0, `demonym of ${civ.id}`);
      this.assertNotEmpty(civ.cityNames, `city names of ${civ.id}`);
    }
  }

  test_battle_status_is_rendered_and_triples_upkeep() {
    const battle = statusById(STATUS_BATTLE);
    this.assertNotNull(battle, "the battle status exists");
    this.assertEqual(battle.icon, "icon_battle.svg");
    this.assertEqual(battle.upkeepMultiplier, 3);
  }

  test_pillage_steps_compound_per_unit() {
    const one = pillageSteps(100000, 1);
    this.assertApprox(one.steps[0].removed, 10000, 1e-6);
    this.assertApprox(one.steps[0].heal, 10, 1e-9);
    this.assertApprox(one.productionMultiplier, PILLAGE.productionPenalty, 1e-9);

    const two = pillageSteps(100000, 2);
    this.assertApprox(two.steps[0].removed, 10000, 1e-6);
    this.assertApprox(two.steps[1].removed, 9000, 1e-6);
    this.assertApprox(two.steps[1].heal, 9, 1e-9);
    this.assertApprox(two.steps[1].remaining, 81000, 1e-6);
    this.assertApprox(two.productionMultiplier, 0.49, 1e-9);
  }

  test_trainable_units_exist_in_the_catalogue() {
    this.assertNotEmpty(TRAINABLE_UNIT_IDS);
    for (const id of TRAINABLE_UNIT_IDS) {
      this.assertNotNull(protoUnitById(id), `trainable unit ${id}`);
    }
  }

  test_artillery_is_expensive_slow_and_long_ranged() {
    const infantry = protoUnitById("modern_infantry");
    const artillery = protoUnitById("artillery");
    this.assertNotNull(artillery, "artillery exists");
    this.assertTrue(artillery.military, "artillery is military");
    this.assertGreater(artillery.cost, infantry.cost * 2, "much more expensive");
    this.assertGreater(artillery.upkeep, infantry.upkeep, "costlier to keep");
    this.assertLess(artillery.speed, infantry.speed, "slower than infantry");
    this.assertLess(artillery.defense, infantry.defense / 4, "nearly no defense");
    this.assertGreater(artillery.attack, infantry.attack, "hits harder");
    this.assertGreater(artillery.range, infantry.range, "outranges infantry");
    this.assertEqual(artillery.range, 2);
    this.assertTrue(TRAINABLE_UNIT_IDS.includes("artillery"), "artillery is trainable");
    this.assertTrue(artillery.icon.endsWith(".svg"));
  }

  test_buildings_and_governments_carry_effects() {
    for (const building of BUILDINGS) {
      // A building carries either stat effects or a rule-based mechanic.
      this.assertTrue(
        building.effects.length > 0 || typeof building.mechanic === "string",
        `${building.id} effects or mechanic`
      );
      this.assertGreater(building.costAlpha, 1, `${building.id} cost growth`);
      this.assertTrue(building.icon && building.icon.endsWith(".svg"), `${building.id} icon`);
      for (const effect of building.effects) {
        this.assertTrue(effect.stat.length > 0);
        this.assertGreater(effect.baseValue, 0);
      }
    }
    for (const government of GOVERNMENTS) {
      this.assertNotEmpty(government.effects, `${government.id} effects`);
    }
  }

  test_policy_effects_are_popularity_points_not_percentages() {
    for (const policy of POLICIES) {
      this.assertFalse(
        policy.targetEffect.includes("%"),
        `${policy.id} target effect is stated in popularity points`
      );
      this.assertFalse(
        policy.politicalCost.includes("%"),
        `${policy.id} political cost is stated in popularity points`
      );
    }
  }

  test_market_and_bank_are_gone() {
    // The Market was removed and the tax-raising Bank is gone too: the state
    // lives on trade taxes alone.
    this.assertEqual(buildingById("market"), null);
    this.assertEqual(buildingById("bank"), null);
  }

  test_new_buildings_declare_their_mechanics() {
    const expected = {
      barracks: "parallel_training",
      shelters: "civilian_shelter",
      aa_building: "air_defense",
      shipyard: "parallel_building",
      port: "port_production",
      airport: "air_immigration",
    };
    for (const [id, mechanic] of Object.entries(expected)) {
      this.assertEqual(buildingById(id).mechanic, mechanic, `${id} mechanic`);
    }
  }

  test_technologies_form_a_tree() {
    const ids = new Set(TECHNOLOGIES.map((t) => t.id));
    for (const tech of TECHNOLOGIES) {
      this.assertGreater(tech.cost, 0, `${tech.id} cost`);
      this.assertNotEmpty(tech.effects, `${tech.id} effects`);
      for (const prerequisite of tech.prerequisites) {
        this.assertTrue(ids.has(prerequisite), `${tech.id} prerequisite ${prerequisite} exists`);
      }
    }
  }

  test_ports_airports_and_shipyards_declare_their_requirements() {
    const port = buildingById("port");
    const airport = buildingById("airport");
    const shipyard = buildingById("shipyard");
    this.assertTrue(port.coastal, "a port needs the coast");
    this.assertNull(port.requiresBuilding, "a port stands on its own");
    this.assertTrue(shipyard.requiresBuilding === "port", "a shipyard needs a port");
    this.assertTrue(shipyard.coastal, "a shipyard needs the coast too");
    this.assertNull(airport.requiresBuilding, "an airport stands on its own");
    this.assertTrue(port.icon.endsWith(".svg"));
    this.assertTrue(airport.icon.endsWith(".svg"));
    this.assertTrue(shipyard.icon.endsWith(".svg"));
  }

  test_aircraft_and_warships_are_gated_and_fuelled() {
    for (const id of ["jet_fighter", "bomber"]) {
      const plane = protoUnitById(id);
      this.assertTrue(plane.air, `${id} is an aircraft`);
      this.assertEqual(plane.requiresBuilding, "airport", `${id} needs an airport`);
      this.assertGreater(plane.speed, 1, `${id} is fast`);
      this.assertGreater(plane.enduranceHours, 0, `${id} has endurance`);
      this.assertGreater(plane.missionRange, 0, `${id} has a mission radius`);
      this.assertTrue(plane.icon.endsWith(".svg"));
    }
    this.assertTrue(protoUnitById("bomber").strike, "the bomber strikes from afar");
    const battleship = protoUnitById("battleship");
    this.assertEqual(battleship.requiresBuilding, "shipyard");
    this.assertEqual(battleship.traversableTerrains, ["Sea"]);
    this.assertTrue(battleship.icon.endsWith(".svg"));
  }

  test_effect_value_scales_with_level() {
    const effect = { baseValue: 10, exponent: 1 };
    this.assertApprox(effectValue(effect, 1), 10);
    this.assertApprox(effectValue(effect, 3), 30);
    this.assertEqual(effectValue(effect, 0), 0);
  }

  test_tundra_is_rocky_but_flat_and_unproductive() {
    const tundra = TERRAIN_TILES.find((t) => t.terrainType === "Tundra");
    this.assertNotNull(tundra, "tundra exists");
    this.assertEqual(tundra.terrainClass, "Land", "tundra is land");
    this.assertEqual(tundra.defenseBonus, 0, "tundra stays flat");
    this.assertApprox(tundra.populationMultiplier, 0.05, 1e-9);
    this.assertApprox(tundra.productionMultiplier, 0.2, 1e-9);
    this.assertApprox(tundra.movementCostMultiplier, 2.0, 1e-9);
  }
}