import { AbilityScoreCalculator } from "../../../src/services/ability-score-calculator";

describe("AbilityScoreCalculator", () => {
    describe("getModifier", () => {
        test("should calculate the modifier for the default of 10", () => {
            const result = AbilityScoreCalculator.getModifier(10);
            expect(result).toBe(0);
        });

        test("should round down to the closest score", () => {
            const result = AbilityScoreCalculator.getModifier(11);
            expect(result).toBe(0);
        });

        test("should return the modifier of a positive value over 10", () => {
            const result = AbilityScoreCalculator.getModifier(20);
            expect(result).toBe(5);
        });

        test("should should round down to the closest score of a positive value over 10", () => {
            const result = AbilityScoreCalculator.getModifier(19);
            expect(result).toBe(4);
        });

        test("should return the modifier of a positive value under 10", () => {
            const result = AbilityScoreCalculator.getModifier(8);
            expect(result).toBe(-1);
        });

        test("should should round down to the closest score of a positive value under 10", () => {
            const result = AbilityScoreCalculator.getModifier(7);
            expect(result).toBe(-2);
        });
    });
});