DndGamePlayer/app/main/diceRoll/diceRollSessionStore.test.ts

import assert from 'node:assert/strict';
import test from 'node:test';

import { DiceRollSessionStore } from './diceRollSessionStore';
import {
  D100_FACE_VALUES,
  formatPredeterminedDiceNotation,
  snapD100Value,
} from '../../shared/types/diceRoll';

void test('diceRoll: roll produces values in range and notation', () => {
  const store = new DiceRollSessionStore();
  store.dispatch({ kind: 'roll', count: 3, sides: 6 });
  const st = store.getState();
  assert.equal(st.active, true);
  assert.equal(st.visibleToPlayers, true);
  assert.equal(st.notation, '3d6');
  assert.equal(st.values.length, 3);
  assert.ok(st.values.every((v) => v >= 1 && v <= 6));
  assert.equal(st.total, st.values.reduce((a, b) => a + b, 0));
});

void test('diceRoll: roll without visibleToPlayers keeps master result only', () => {
  const store = new DiceRollSessionStore();
  store.dispatch({ kind: 'setVisibleToPlayers', visible: false });
  store.dispatch({ kind: 'roll', count: 2, sides: 8 });
  const st = store.getState();
  assert.equal(st.visibleToPlayers, false);
  assert.equal(st.active, false);
  assert.equal(st.notation, '2d8');
  assert.equal(st.values.length, 2);
  assert.ok(st.values.every((v) => v >= 1 && v <= 8));
  assert.equal(st.startedAt, null);
});

void test('diceRoll: unchecking visibleToPlayers hides overlay', () => {
  const store = new DiceRollSessionStore();
  store.dispatch({ kind: 'roll', count: 1, sides: 20 });
  assert.equal(store.getState().active, true);
  const values = [...store.getState().values];
  store.dispatch({ kind: 'setVisibleToPlayers', visible: false });
  assert.equal(store.getState().active, false);
  assert.equal(store.getState().visibleToPlayers, false);
  assert.deepEqual(store.getState().values, values);
});

void test('diceRoll: d100 values are tens faces only', () => {
  const store = new DiceRollSessionStore();
  store.dispatch({ kind: 'roll', count: 5, sides: 100 });
  const st = store.getState();
  assert.equal(st.notation, '5d100');
  assert.equal(st.values.length, 5);
  const allowed = new Set<number>(D100_FACE_VALUES);
  assert.ok(st.values.every((v) => allowed.has(v)));
  assert.equal(st.total, st.values.reduce((a, b) => a + b, 0));
});

void test('diceRoll: clear resets but keeps visibleToPlayers', () => {
  const store = new DiceRollSessionStore();
  store.dispatch({ kind: 'setVisibleToPlayers', visible: false });
  store.dispatch({ kind: 'roll', count: 1, sides: 20 });
  store.dispatch({ kind: 'clear' });
  assert.equal(store.getState().active, false);
  assert.deepEqual(store.getState().values, []);
  assert.equal(store.getState().visibleToPlayers, false);
});

void test('diceRoll: hideOverlay keeps values for master UI', () => {
  const store = new DiceRollSessionStore();
  store.dispatch({ kind: 'roll', count: 2, sides: 6 });
  const values = [...store.getState().values];
  const total = store.getState().total;
  store.dispatch({ kind: 'hideOverlay' });
  assert.equal(store.getState().active, false);
  assert.deepEqual(store.getState().values, values);
  assert.equal(store.getState().total, total);
  assert.equal(store.getState().notation, '2d6');
  assert.equal(store.getState().visibleToPlayers, true);
});

void test('diceRoll: roll with zero count is no-op', () => {
  const store = new DiceRollSessionStore();
  store.dispatch({ kind: 'setVisibleToPlayers', visible: false });
  const before = store.getState().revision;
  store.dispatch({ kind: 'roll', count: 0, sides: 6 });
  assert.equal(store.getState().revision, before);
  assert.deepEqual(store.getState().values, []);
});

void test('formatPredeterminedDiceNotation', () => {
  assert.equal(formatPredeterminedDiceNotation(2, 20, [15, 7]), '2d20@15,7');
  assert.equal(formatPredeterminedDiceNotation(2, 100, [20, 100]), '2d100@20,100');
  assert.equal(formatPredeterminedDiceNotation(1, 100, [27]), '1d100@30');
});

void test('snapD100Value', () => {
  assert.equal(snapD100Value(20), 20);
  assert.equal(snapD100Value(21), 30);
  assert.equal(snapD100Value(100), 100);
  assert.equal(snapD100Value(1), 10);
});