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d4cb50fbf1
* BUGFIX: Fix calculateExp so that it won't return a too small result Due to floating point rounding issues, when applying the inverse operation and flooring, roughly half the time we would get the next lower skill level. This quickly finds a slightly higher result that gives the correct inverse. * clearer test layout
35 lines
1.5 KiB
TypeScript
35 lines
1.5 KiB
TypeScript
import { calculateSkill, calculateExp } from "../../../src/PersonObjects/formulas/skill";
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describe("calculateSkill", () => {
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test.each([...new Array(300).keys()])("Correct inverse %i", (skill: number) => {
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if (skill < 2) return; // There are special cases to be dealt with
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const xp1 = calculateExp(skill);
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expect(calculateSkill(xp1)).toBe(skill);
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expect(calculateSkill(xp1 * 0.999999999)).toBe(skill - 1);
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const xp2 = calculateExp(skill, 1.4);
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expect(calculateSkill(xp2, 1.4)).toBe(skill);
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expect(calculateSkill(xp2 * 0.999999999, 1.4)).toBe(skill - 1);
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if (skill < 4) return; // 3 is a special case for this mult
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const xp3 = calculateExp(skill, 3.3);
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expect(calculateSkill(xp3, 3.3)).toBe(skill);
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expect(calculateSkill(xp3 * 0.999999999, 3.3)).toBe(skill - 1);
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expect(calculateSkill(calculateExp(skill, 3.3), 3.3)).toBe(skill);
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});
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test("Special cases", () => {
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expect(() => calculateExp(NaN)).toThrow();
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expect(calculateExp(Infinity)).toBe(Number.MAX_VALUE);
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expect(calculateExp(-Infinity)).toBe(0);
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// In all these cases, the XP is clamped to 0. With a big enough mult,
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// this gets converted back to a larger skill.
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expect(calculateSkill(calculateExp(0))).toBe(1);
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expect(calculateSkill(calculateExp(0, 1.4), 1.4)).toBe(1);
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expect(calculateSkill(calculateExp(0, 3.3), 3.3)).toBe(3);
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expect(calculateSkill(calculateExp(1))).toBe(1);
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expect(calculateSkill(calculateExp(1, 1.4), 1.4)).toBe(1);
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expect(calculateSkill(calculateExp(1, 3.3), 3.3)).toBe(3);
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});
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});
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