Battle-for-Tismo/tests/simple_pool_test.js

// The global resource pool and public production introduced by
// 02-resource-pool-and-production.md: one pool per player, every producer
// feeding it, and no per-tile store or private-agent accounting in the simple
// model. The hard economy must keep its per-region stores.
//
// Note on the hard fixtures: `smallState` now pins `economyModel: "hard"` so
// the historical suites keep exercising the model they were written against;
// these tests use `simpleState` for the simple model.

import { TestCase } from "./framework/test_case.js";
import { simpleState, smallState, cityOf } from "./framework/helpers.js";
import { SIMPLE_ECONOMY, STORABLE_RESOURCE_IDS } from "../shared/data.js";

export class SimplePoolTest extends TestCase {
  test_a_simple_game_has_one_seeded_pool_per_civ() {
    const state = simpleState();
    this.assertEqual(state.resourcePools.size, state.civilisations.length, "one pool per nation");
    for (let civ = 0; civ < state.civilisations.length; civ++) {
      const pool = state.getResourcePool(civ);
      for (const id of STORABLE_RESOURCE_IDS) {
        this.assertEqual(
          pool[id],
          SIMPLE_ECONOMY.startingPool[id],
          `${id} in civ ${civ}'s pool`
        );
      }
    }
  }

  test_a_simple_game_keeps_no_per_tile_stock() {
    const state = simpleState();
    state.applyStartingScenario();
    for (let hour = 0; hour < 24; hour++) state.advanceHour();
    this.assertEqual(state.resourceStock.size, 0, "nothing is written to the per-tile store");
  }

  test_a_city_stock_is_a_view_of_its_owners_pool() {
    const state = simpleState();
    const pool = state.getResourcePool(0);
    const city = cityOf(state, 0);
    this.assertTrue(state.getCityResourceStock(city) === pool, "the city reads the pool");
    state.getCityResourceStock(city).steel = 1234;
    this.assertEqual(pool.steel, 1234, "an edit through the city view lands in the pool");
  }

  test_the_hard_game_keeps_per_tile_stock() {
    const state = smallState();
    this.assertEqual(typeof state.getResourcePool, "undefined", "no pool API on the hard model");
    this.assertTrue(state.resourceStock.size > 0, "hard cities and works hold their own stock");
  }

  test_the_public_producers_fill_the_pool() {
    const state = simpleState();
    // Isolate production from the day's consumption and grid, so whatever the
    // pool gains is exactly the public works' and the land's output.
    state._consumeCityResources = () => {};
    state._settleUpkeep = () => 1;
    state._applyWorksMaintenance = () => {};
    state._buildEnergyLedger = () => new Map();
    const pool = state.getResourcePool(0);
    for (const id of STORABLE_RESOURCE_IDS) pool[id] = 0;
    state._tickResources();
    const produced = STORABLE_RESOURCE_IDS.filter((id) => pool[id] > 0);
    this.assertNotEmpty(produced, `a public producer fed the pool (got ${JSON.stringify(pool)})`);
  }

  test_procurement_is_a_pool_draw_without_a_supplier_search() {
    const state = simpleState();
    const pool = state.getResourcePool(0);
    pool.steel = 1000;
    let searched = false;
    state._nearbySuppliers = () => { searched = true; return []; };
    state._resourceNodes = () => { searched = true; return []; };
    const city = cityOf(state, 0);
    const drawn = state._drawFromNearest(0, city.coords, { steel: 400, hightech: 0 });
    this.assertEqual(drawn.steel, 400, "the pool supplied the draw");
    this.assertEqual(pool.steel, 600, "and was debited exactly");
    this.assertFalse(searched, "no supplier search ran");
    const rest = state._drawFromNearest(0, city.coords, { steel: 1000, hightech: 0 });
    this.assertEqual(rest.steel, 600, "a shortfall takes only what is there");
    this.assertEqual(pool.steel, 0, "the pool is empty, not negative");
  }

  test_a_pool_shortfall_leaves_the_need_unmet() {
    const state = simpleState();
    const pool = state.getResourcePool(0);
    pool.steel = 100;
    const missing = state._drawFromCities(0, "steel", 500);
    this.assertEqual(missing, 400, "the unmet amount is reported");
    this.assertEqual(pool.steel, 0);
    const city = cityOf(state, 0);
    this.assertEqual(
      state._procureFromNeighbours(city, "steel", 400, {}, state._resourceNodes(), {}),
      0,
      "no bid is placed for the shortfall"
    );
  }

  test_the_summary_reports_the_pool_and_its_public_production() {
    const state = simpleState();
    const summary = state.getCivResourceSummary(0);
    const pool = state.getResourcePool(0);
    for (const id of STORABLE_RESOURCE_IDS) {
      this.assertEqual(summary.stock[id], pool[id], `${id} stock is the pool`);
    }
    this.assertTrue(summary.production.food > 0, "the land's harvest is public production");
  }

  test_a_simple_day_moves_the_pool_without_throwing() {
    const state = simpleState();
    state.applyStartingScenario();
    const before = { ...state.getResourcePool(0) };
    for (let hour = 0; hour < 24; hour++) state.advanceHour();
    const after = state.getResourcePool(0);
    const changed = STORABLE_RESOURCE_IDS.some((id) => before[id] !== after[id]);
    this.assertTrue(changed, "the day's production and consumption moved the pool");
    this.assertEqual(state.getPrivateBuildingCash(0), 0, "no private building cash is kept");
    this.assertEmpty(state.getProductionAgents(0), "no private production agents exist");
  }
}