test(simulation): Add tier-2 event system and simulation behavior test cases

Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>
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Claude Code 2026-04-07 21:34:30 -07:00
parent b741f37612
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import { describe, it, expect } from 'vitest'
import { EventEvaluator } from '@magic-civ/engine-ts/eventSystem'
import type { EventCatalog, ActiveEffect } from '@magic-civ/engine-ts/eventSystem'
import {
makeGrid, VOLCANIC_CATALOG, SOLAR_CATALOG, CROSS_TRIGGERS,
} from './event-system-helpers'
// ---------------------------------------------------------------------------
// Tier 2 — Cross-trigger tests
// ---------------------------------------------------------------------------
describe('EventEvaluator — Tier 2: cross-triggers', () => {
describe('drought_t4_boosts_wildfire', () => {
it('creates wildfire frequency boost active effect after drought T4', () => {
const catalog: EventCatalog = {
drought: {
base_frequency: 0.05,
severity_weights: [30, 20, 15, 10, 5, 0, 0, 0, 0, 0],
tiers: { '4': { name: 'Severe Drought', radius: 5, moisture_loss: 0.2 } },
},
wildfire: {
base_frequency: 0.01,
severity_weights: [60, 30, 10, 0, 0, 0, 0, 0, 0, 0],
tiers: { '1': { name: 'Wildfire', radius: 3, canopy_loss: 0.3 } },
},
}
const evaluator = new EventEvaluator(catalog, CROSS_TRIGGERS, 42)
const grid = makeGrid()
evaluator.fireEvent('drought', 4, grid, 0, 0, 0)
const boostEffect = evaluator.getActiveEffects().find(
(e: ActiveEffect) => e.boostsCategory === 'wildfire'
)
expect(boostEffect).toBeDefined()
expect(boostEffect!.boostsMultiplier).toBeCloseTo(2.0, 5)
expect(boostEffect!.turnsRemaining).toBe(5)
})
it('does NOT create wildfire boost for drought T3', () => {
const catalog: EventCatalog = {
drought: {
base_frequency: 0.05,
severity_weights: [30, 20, 15, 10, 5, 0, 0, 0, 0, 0],
tiers: {
'3': { name: 'Drought', radius: 3, moisture_loss: 0.1 },
'4': { name: 'Severe Drought', radius: 5, moisture_loss: 0.2 },
},
},
}
const evaluator = new EventEvaluator(catalog, CROSS_TRIGGERS, 42)
const grid = makeGrid()
evaluator.fireEvent('drought', 3, grid, 0, 0, 0)
const boostEffect = evaluator.getActiveEffects().find(
(e: ActiveEffect) => e.boostsCategory === 'wildfire'
)
expect(boostEffect).toBeUndefined()
})
})
describe('pandemic_t4_boosts_plague', () => {
it('creates plague frequency boost after pandemic T4', () => {
const catalog: EventCatalog = {
pandemic: {
base_frequency: 0.01,
severity_weights: [30, 25, 20, 15, 10, 0, 0, 0, 0, 0],
tiers: { '4': { name: 'Pandemic', radius: 99, fauna_loss: 0.1 } },
},
plague: {
base_frequency: 0.005,
severity_weights: [40, 30, 20, 10, 0, 0, 0, 0, 0, 0],
tiers: { '1': { name: 'Plague', radius: 5, fauna_loss: 0.05 } },
},
}
const evaluator = new EventEvaluator(catalog, CROSS_TRIGGERS, 42)
const grid = makeGrid()
evaluator.fireEvent('pandemic', 4, grid, 0, 0, 0)
const boostEffect = evaluator.getActiveEffects().find(
(e: ActiveEffect) => e.boostsCategory === 'plague'
)
expect(boostEffect).toBeDefined()
expect(boostEffect!.boostsMultiplier).toBeCloseTo(1.5, 5)
expect(boostEffect!.turnsRemaining).toBe(5)
})
})
describe('volcanic_t4_triggers_tsunami (probabilistic — 50% chance)', () => {
it('fires tsunami in approximately half of volcanic T4 invocations across many turns', () => {
const catalog: EventCatalog = {
volcanic: VOLCANIC_CATALOG.volcanic!,
tsunami: {
base_frequency: 0,
severity_weights: [60, 30, 10, 0, 0, 0, 0, 0, 0, 0],
tiers: {
'1': { name: 'Tsunami', radius: 3, moisture_loss: 0.2 },
'2': { name: 'Great Tsunami', radius: 6, moisture_loss: 0.4 },
},
},
}
const evaluator = new EventEvaluator(catalog, CROSS_TRIGGERS, 42)
const grid = makeGrid()
let tsunamiCount = 0
for (let turn = 0; turn < 40; turn++) {
const events = evaluator.fireEvent('volcanic', 4, grid, turn, 0, 0)
if (events.some(e => e.type.startsWith('tsunami_'))) tsunamiCount++
}
expect(tsunamiCount).toBeGreaterThan(0)
expect(tsunamiCount).toBeLessThan(40)
})
})
describe('solar minimum cross-trigger — boost wiring', () => {
it('solar T5 boosts glacial base_frequency while active', () => {
const silentSolar: EventCatalog = {
solar: { ...SOLAR_CATALOG.solar!, base_frequency: 0 },
glacial: SOLAR_CATALOG.glacial!,
}
const evaluator = new EventEvaluator(silentSolar, CROSS_TRIGGERS, 42)
const grid = makeGrid()
const boostBefore = evaluator.getActiveEffects().find(
(e: ActiveEffect) => e.boostsCategory === 'glacial'
)
expect(boostBefore).toBeUndefined()
evaluator.fireEvent('solar', 5, grid, 0, 0, 0)
const boostAfter = evaluator.getActiveEffects().find(
(e: ActiveEffect) => e.boostsCategory === 'glacial'
)
expect(boostAfter).toBeDefined()
expect(boostAfter!.boostsMultiplier).toBeCloseTo(1.5, 5)
})
})
describe('PRNG determinism', () => {
it('same seed + same turn always produces identical event sequence', () => {
const evaluatorA = new EventEvaluator(VOLCANIC_CATALOG, CROSS_TRIGGERS, 12345)
const evaluatorB = new EventEvaluator(VOLCANIC_CATALOG, CROSS_TRIGGERS, 12345)
const gridA = makeGrid()
const gridB = makeGrid()
const eventsA = evaluatorA.fireEvent('volcanic', 5, gridA, 100, 0, 0)
const eventsB = evaluatorB.fireEvent('volcanic', 5, gridB, 100, 0, 0)
expect(eventsA).toEqual(eventsB)
for (let i = 0; i < gridA.tiles.length; i++) {
expect(gridA.tiles[i]!.sulfate_aerosol).toBeCloseTo(gridB.tiles[i]!.sulfate_aerosol, 10)
}
})
it('different seeds produce different PRNG sequences (checkWillFire diverges)', () => {
const evaluatorA = new EventEvaluator(SOLAR_CATALOG, {}, 1)
const evaluatorB = new EventEvaluator(SOLAR_CATALOG, {}, 999999)
let sameCount = 0
const N = 100
for (let t = 0; t < N; t++) {
if (evaluatorA.checkWillFire(t) === evaluatorB.checkWillFire(t)) sameCount++
}
expect(sameCount).toBeLessThan(N)
})
})
describe('EventEvaluator construction', () => {
it('skips categories with base_frequency=0 in checkWillFire', () => {
const mixedCatalog: EventCatalog = {
always_zero: { base_frequency: 0, severity_weights: [100, 0, 0, 0, 0, 0, 0, 0, 0, 0], tiers: { '1': { name: 'Zero' } } },
very_rare: { base_frequency: 0.0001, severity_weights: [100, 0, 0, 0, 0, 0, 0, 0, 0, 0], tiers: { '1': { name: 'Rare' } } },
}
const evaluator = new EventEvaluator(mixedCatalog, {}, 42)
let fires = 0
for (let t = 0; t < 10; t++) {
if (evaluator.checkWillFire(t)) fires++
}
expect(fires).toBeGreaterThanOrEqual(0)
})
it('handles empty catalog gracefully', () => {
const evaluator = new EventEvaluator({}, {}, 42)
const grid = makeGrid()
expect(evaluator.checkWillFire(0)).toBe(false)
expect(evaluator.hasActiveEffects()).toBe(false)
expect(evaluator.evaluateTurn(grid, 0)).toEqual([])
})
})
})