slaguru666andClaude Opus 4.8
49e9dcda46
Add brp-d100 rule-pack (Basic Roleplaying roll-under): fumble on 100, critical <= skill/20, special <= skill/5, success <= skill — bands transcribed from the Continuum Day One console's verdict() logic. Register it and switch day-one meta.system from coc-d100 to brp-d100. tests/dice/brp-d100.test.js covers the ladder, low-skill rounding, and the fumble-only-on-100 edge. 147 tests pass. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
47 lines
2.2 KiB
JavaScript
47 lines
2.2 KiB
JavaScript
import { describe, it, expect } from 'vitest';
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import { brpD100 } from '../../src/dice/rulepacks/brp-d100.js';
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import { getRulePack } from '../../src/dice/rulepacks/index.js';
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const roll = (v) => [{ sides: 100, value: v }];
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describe('brp-d100 rule-pack', () => {
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it('grades the ladder against a 50% skill (crit ≤3, special ≤10, success ≤50)', () => {
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expect(brpD100.interpret(roll(3), { target: 50 }).level).toBe('critical'); // ceil(50/20)=3
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expect(brpD100.interpret(roll(4), { target: 50 }).level).toBe('special');
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expect(brpD100.interpret(roll(10), { target: 50 }).level).toBe('special'); // ceil(50/5)=10
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expect(brpD100.interpret(roll(11), { target: 50 }).level).toBe('success');
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expect(brpD100.interpret(roll(50), { target: 50 }).level).toBe('success');
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expect(brpD100.interpret(roll(51), { target: 50 }).level).toBe('failure');
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});
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it('fumbles only on 100 (a plain miss otherwise, even at 96–99)', () => {
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expect(brpD100.interpret(roll(100), { target: 50 }).level).toBe('fumble');
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expect(brpD100.interpret(roll(99), { target: 50 }).level).toBe('failure');
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expect(brpD100.interpret(roll(100), { target: 100 }).level).toBe('fumble'); // 100 fumbles even at skill 100
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});
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it('rounds the crit/special fractions up for low skills', () => {
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// skill 25: crit ≤ ceil(25/20)=2, special ≤ ceil(25/5)=5
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expect(brpD100.interpret(roll(2), { target: 25 }).level).toBe('critical');
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expect(brpD100.interpret(roll(5), { target: 25 }).level).toBe('special');
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expect(brpD100.interpret(roll(6), { target: 25 }).level).toBe('success');
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});
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it('marks crit/special/success as success, fumble/failure as not', () => {
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expect(brpD100.interpret(roll(3), { target: 50 }).success).toBe(true);
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expect(brpD100.interpret(roll(50), { target: 50 }).success).toBe(true);
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expect(brpD100.interpret(roll(51), { target: 50 }).success).toBe(false);
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expect(brpD100.interpret(roll(100), { target: 50 }).success).toBe(false);
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});
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it('defaults skill to 50 and summarises', () => {
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const v = brpD100.interpret(roll(4));
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expect(v.target).toBe(50);
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expect(brpD100.summary(v)).toBe('4 vs 50% → SPECIAL');
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});
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it('is registered', () => {
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expect(getRulePack('brp-d100')).toBe(brpD100);
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});
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});
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