import { describe, expect, it } from "vitest";
import { getDamageRanges } from "./damageRanges";
describe("getDamageRanges", () => {
it("基本ダメージから16段階の乱数を生成する", () => {
const ranges = getDamageRanges(100);
expect(ranges).toHaveLength(16);
expect(ranges[0]).toBe(85); // 100 * 0.85 = 85
expect(ranges[15]).toBe(100); // 100 * 1.00 = 100
});
it("各乱数は昇順になっている", () => {
const ranges = getDamageRanges(50);
for (let i = 1; i < ranges.length; i++) {
expect(ranges[i]).toBeGreaterThanOrEqual(ranges[i - 1]);
}
});
it("小数点以下は切り捨てられる", () => {
const ranges = getDamageRanges(10);
// 10 * 0.85 = 8.5 → 8
// 10 * 0.86 = 8.6 → 8
// 10 * 0.87 = 8.7 → 8
expect(ranges[0]).toBe(8);
expect(ranges[1]).toBe(8);
expect(ranges[2]).toBe(8);
});
it("最小ダメージは1", () => {
const ranges = getDamageRanges(1);
expect(ranges.every((damage) => damage >= 1)).toBe(true);
});
it("ダメージが0の場合は全て0を返す", () => {
const ranges = getDamageRanges(0);
expect(ranges).toHaveLength(16);
expect(ranges.every((damage) => damage === 0)).toBe(true);
});
});
