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initiative/packages/domain/src/__tests__/roll-initiative.test.ts
Lukas 36768d3aa1 Upgrade Biome to 2.4.7 and enable 54 additional lint rules
Add rules covering bug prevention (noLeakedRender, noFloatingPromises,
noImportCycles, noReactForwardRef), security (noScriptUrl, noAlert),
performance (noAwaitInLoops, useTopLevelRegex), and code style
(noNestedTernary, useGlobalThis, useNullishCoalescing, useSortedClasses,
plus ~40 more). Fix all violations: extract top-level regex constants,
guard React && renders with boolean coercion, refactor nested ternaries,
replace window with globalThis, sort Tailwind classes, and introduce
expectDomainError test helper to eliminate conditional expects.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-14 14:25:09 +01:00

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import { describe, expect, it } from "vitest";
import { rollInitiative } from "../roll-initiative.js";
import { isDomainError } from "../types.js";
import { expectDomainError } from "./test-helpers.js";
describe("rollInitiative", () => {
describe("valid rolls", () => {
it("normal roll: 15 + modifier 7 = 22", () => {
expect(rollInitiative(15, 7)).toBe(22);
});
it("boundary: roll 1 + modifier 0 = 1", () => {
expect(rollInitiative(1, 0)).toBe(1);
});
it("boundary: roll 20 + modifier 0 = 20", () => {
expect(rollInitiative(20, 0)).toBe(20);
});
it("negative modifier: roll 1 + (3) = 2", () => {
expect(rollInitiative(1, -3)).toBe(-2);
});
it("zero modifier: roll 10 + 0 = 10", () => {
expect(rollInitiative(10, 0)).toBe(10);
});
it("large positive modifier: roll 20 + 12 = 32", () => {
expect(rollInitiative(20, 12)).toBe(32);
});
});
describe("invalid dice rolls", () => {
it("rejects 0", () => {
const result = rollInitiative(0, 5);
expectDomainError(result, "invalid-dice-roll");
});
it("rejects 21", () => {
const result = rollInitiative(21, 5);
expectDomainError(result, "invalid-dice-roll");
});
it("rejects non-integer (3.5)", () => {
const result = rollInitiative(3.5, 0);
expect(isDomainError(result)).toBe(true);
});
it("rejects negative dice roll", () => {
const result = rollInitiative(-1, 0);
expect(isDomainError(result)).toBe(true);
});
it("rejects NaN", () => {
const result = rollInitiative(Number.NaN, 0);
expect(isDomainError(result)).toBe(true);
});
});
describe("determinism", () => {
it("same input produces same output", () => {
expect(rollInitiative(10, 5)).toBe(rollInitiative(10, 5));
});
});
});