healer-man/src/game/coaGuardianVanguardRuntime.test.ts

import { describe, expect, it } from "vitest";
import type { ClassId } from "../app/characterCatalog";
import { coaSpellById, coaTreeEntryById } from "./coaLiveCatalog";
import { applyAura, resolveDamageValue, type ActiveAura } from "./combatAuras";
import {
  applyCoaGuardianVanguardEvent,
  COA_GUARDIAN_VANGUARD_AURA,
  COA_GUARDIAN_VANGUARD_AURA_ID,
  COA_GUARDIAN_VANGUARD_DURATION_MS,
  COA_GUARDIAN_VANGUARD_MAX_STACKS,
  COA_GUARDIAN_VANGUARDS_SHIELD_TALENT_ENTRY_ID,
  hasCoaGuardianVanguardsShield,
  type CoaGuardianVanguardActor,
} from "./coaGuardianVanguardRuntime";

const actor = (
  id = "guardian-player",
  classId: ClassId = "guardian",
  rank = 1,
): CoaGuardianVanguardActor => ({
  id,
  classId,
  talentRanks: { [`coa-entry-${COA_GUARDIAN_VANGUARDS_SHIELD_TALENT_ENTRY_ID}`]: rank },
});

describe("CoA Guardian Vanguard runtime", () => {
  it("matches the August node and global DBC stack payload", () => {
    expect(coaTreeEntryById(COA_GUARDIAN_VANGUARDS_SHIELD_TALENT_ENTRY_ID)).toMatchObject({
      classId: 18,
      name: "Vanguard's Shield",
      entryType: "Talent",
      rankDescriptions: [{ rank: 1, spellId: 804383 }],
    });
    expect(coaSpellById(804383)?.dbc?.effects.some((effect) => effect.triggerSpellId === 804384)).toBe(true);
    expect(coaSpellById(804384)?.dbc).toMatchObject({
      durationMs: COA_GUARDIAN_VANGUARD_DURATION_MS,
      stackAmount: COA_GUARDIAN_VANGUARD_MAX_STACKS,
      effects: [expect.objectContaining({
        auraType: 87,
        basePoints: -2,
        miscValue: 126,
      })],
    });
    expect(COA_GUARDIAN_VANGUARD_AURA.modifiers).toHaveLength(6);
  });

  it("gates stack transitions on the learned Guardian talent", () => {
    expect(hasCoaGuardianVanguardsShield(actor())).toBe(true);
    expect(hasCoaGuardianVanguardsShield(actor("other", "guardian", 0))).toBe(false);
    expect(hasCoaGuardianVanguardsShield(actor("other", "warrior", 1))).toBe(false);

    const current: readonly ActiveAura[] = [];
    expect(applyCoaGuardianVanguardEvent(current, actor("other", "guardian", 0), "block", 100))
      .toBe(current);
  });

  it("adds one stack on each landed auto attack or block, refreshes for a minute, and caps at ten", () => {
    let auras: readonly ActiveAura[] = [];
    auras = applyCoaGuardianVanguardEvent(auras, actor(), "auto-attack-landed", 1_000);
    expect(auras[0]).toMatchObject({
      definition: { id: COA_GUARDIAN_VANGUARD_AURA_ID },
      sourceId: "guardian-player",
      targetId: "guardian-player",
      stacks: 1,
      appliedAt: 1_000,
      expiresAt: 1_000 + COA_GUARDIAN_VANGUARD_DURATION_MS,
    });

    auras = applyCoaGuardianVanguardEvent(auras, actor(), "block", 2_000);
    expect(auras[0]).toMatchObject({ stacks: 2, appliedAt: 2_000, expiresAt: 62_000 });
    for (let index = 2; index < 12; index += 1) {
      auras = applyCoaGuardianVanguardEvent(auras, actor(), "block", 2_000 + index * 100);
    }
    expect(auras[0]!.stacks).toBe(COA_GUARDIAN_VANGUARD_MAX_STACKS);
  });

  it("reduces each magic school by two percent per stack, excluding physical damage", () => {
    let tenStacks: readonly ActiveAura[] = [];
    for (let index = 0; index < 10; index += 1) {
      tenStacks = applyCoaGuardianVanguardEvent(
        tenStacks,
        actor(),
        index === 0 ? "block" : "auto-attack-landed",
        1_000 + index,
      );
    }

    for (const school of ["holy", "fire", "nature", "frost", "shadow", "arcane"] as const) {
      expect(resolveDamageValue(100, tenStacks, { direction: "taken", school, attackKind: "spell" })).toBe(80);
    }
    expect(resolveDamageValue(100, tenStacks, { direction: "taken", school: "physical", attackKind: "melee" }))
      .toBe(100);
  });

  it("consumes one stack on a spell hit without refreshing duration and removes the last stack", () => {
    let auras = applyCoaGuardianVanguardEvent([], actor(), "block", 1_000);
    auras = applyCoaGuardianVanguardEvent(auras, actor(), "auto-attack-landed", 2_000);
    auras = applyCoaGuardianVanguardEvent(auras, actor(), "spell-hit", 3_000);
    expect(auras[0]).toMatchObject({ stacks: 1, appliedAt: 2_000, expiresAt: 62_000 });

    const depleted = applyCoaGuardianVanguardEvent(auras, actor(), "spell-hit", 4_000);
    expect(depleted).toEqual([]);
    expect(applyCoaGuardianVanguardEvent(depleted, actor(), "spell-hit", 5_000)).toEqual([]);
  });

  it("keeps stacks actor-owned and ignores unrelated event types", () => {
    const guardianA = actor("guardian-a");
    const guardianB = actor("guardian-b");
    const oneStack = applyCoaGuardianVanguardEvent([], guardianA, "block", 1_000);
    expect(applyCoaGuardianVanguardEvent(oneStack, guardianB, "other", 2_000)).toBe(oneStack);

    const both = applyCoaGuardianVanguardEvent(oneStack, guardianB, "auto-attack-landed", 2_000);
    expect(both.map((aura) => [aura.targetId, aura.stacks])).toEqual([
      ["guardian-a", 1],
      ["guardian-b", 1],
    ]);
  });

  it("does not stack or consume another source's aura on the same target", () => {
    const foreign = applyAura([], {
      definition: COA_GUARDIAN_VANGUARD_AURA,
      sourceId: "another-actor",
      targetId: "guardian-player",
      now: 1_000,
      stacks: 3,
    }).aura;
    const stacked = applyCoaGuardianVanguardEvent([foreign], actor(), "block", 2_000);
    expect(stacked).toHaveLength(2);
    expect(stacked.find((aura) => aura.sourceId === "another-actor")?.stacks).toBe(3);

    const hit = applyCoaGuardianVanguardEvent([foreign], actor(), "spell-hit", 3_000);
    expect(hit).toEqual([foreign]);
  });

  it("discards an expired Vanguard aura before applying a fresh event", () => {
    const expired = applyCoaGuardianVanguardEvent([], actor(), "block", 1_000);
    const fresh = applyCoaGuardianVanguardEvent(expired, actor(), "block", 61_000);
    expect(fresh).toHaveLength(1);
    expect(fresh[0]).toMatchObject({ stacks: 1, appliedAt: 61_000, expiresAt: 121_000 });
  });
});