jlpt/tests.html at main · alanfwilliams/jlpt · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>JLPT N5 — Test Suite</title>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/qunit/2.20.0/qunit.min.css">
<style>
  body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; }
  #qunit-fixture { display: none; }
</style>
</head>
<body>
<div id="qunit"></div>
<div id="qunit-fixture"></div>

<!-- Load curriculum data and pure utility functions -->
<script src="curriculum.js"></script>
<script src="lib.js"></script>
<!-- QUnit runner -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/qunit/2.20.0/qunit.min.js"></script>

<script>
"use strict";

// ── 1. SM-2 Algorithm — sm2Update(card, grade) ───────────────────────────────
QUnit.module('sm2Update', function () {

  QUnit.test('null card uses SM-2 defaults (ef=2.5, interval=1, reps=0)', function (assert) {
    var result = sm2Update(null, 3);
    assert.equal(result.reps, 1, 'reps increments from 0 to 1');
    assert.equal(result.interval, 1, 'reps was 0, so interval stays 1');
    assert.ok(typeof result.due === 'number', 'due is a number');
  });

  QUnit.test('grade >= 3, reps=0 → interval=1, reps becomes 1', function (assert) {
    var result = sm2Update({ interval: 1, ef: 2.5, reps: 0 }, 3);
    assert.equal(result.interval, 1);
    assert.equal(result.reps, 1);
  });

  QUnit.test('grade >= 3, reps=1 → interval=6, reps becomes 2', function (assert) {
    var result = sm2Update({ interval: 1, ef: 2.5, reps: 1 }, 3);
    assert.equal(result.interval, 6);
    assert.equal(result.reps, 2);
  });

  QUnit.test('grade >= 3, reps>=2 → interval=round(interval * ef)', function (assert) {
    var card = { interval: 6, ef: 2.5, reps: 2 };
    var result = sm2Update(card, 3);
    assert.equal(result.interval, Math.round(6 * 2.5)); // 15
    assert.equal(result.reps, 3);
  });

  QUnit.test('grade < 3 resets reps to 0 and interval to 1', function (assert) {
    var card = { interval: 15, ef: 2.5, reps: 5 };
    var result = sm2Update(card, 2);
    assert.equal(result.reps, 0);
    assert.equal(result.interval, 1);
  });

  QUnit.test('grade=0 also resets card', function (assert) {
    var result = sm2Update({ interval: 30, ef: 2.5, reps: 10 }, 0);
    assert.equal(result.reps, 0);
    assert.equal(result.interval, 1);
  });

  QUnit.test('grade=5 (perfect) increases EF', function (assert) {
    var result = sm2Update({ interval: 1, ef: 2.5, reps: 1 }, 5);
    assert.ok(result.ef > 2.5, 'EF increases on perfect grade');
  });

  QUnit.test('grade=3 (bare pass) decreases EF', function (assert) {
    var result = sm2Update({ interval: 1, ef: 2.5, reps: 1 }, 3);
    assert.ok(result.ef < 2.5, 'EF decreases on grade 3');
  });

  QUnit.test('EF is never below 1.3 (clamp)', function (assert) {
    // Start at minimum EF and apply grade 3 repeatedly
    var card = { interval: 1, ef: 1.3, reps: 2 };
    for (var i = 0; i < 5; i++) {
      card = sm2Update(card, 3);
      assert.ok(card.ef >= 1.3, 'EF must never drop below 1.3 (iteration ' + (i + 1) + ')');
    }
  });

  QUnit.test('due date is set to interval days from now', function (assert) {
    var before = Date.now();
    // reps=1 → interval becomes 6
    var result = sm2Update({ interval: 1, ef: 2.5, reps: 1 }, 3);
    var after = Date.now();
    var msPerDay = 24 * 60 * 60 * 1000;
    var expectedMin = before + 6 * msPerDay;
    var expectedMax = after + 6 * msPerDay;
    assert.ok(result.due >= expectedMin && result.due <= expectedMax,
      'due is approximately 6 days from now');
  });

  QUnit.test('grade=5 EF formula: ef + 0.1 - 0*(0.08+0*0.02)', function (assert) {
    var card = { interval: 1, ef: 2.5, reps: 0 };
    var result = sm2Update(card, 5);
    var expected = Math.max(1.3, 2.5 + 0.1 - 0 * (0.08 + 0 * 0.02));
    assert.ok(Math.abs(result.ef - expected) < 0.0001, 'EF formula correct for grade 5');
  });

  QUnit.test('grade=4 EF formula: ef + 0.1 - 1*(0.08+1*0.02)', function (assert) {
    var card = { interval: 1, ef: 2.5, reps: 0 };
    var result = sm2Update(card, 4);
    var expected = Math.max(1.3, 2.5 + 0.1 - 1 * (0.08 + 1 * 0.02));
    assert.ok(Math.abs(result.ef - expected) < 0.0001, 'EF formula correct for grade 4');
  });

  QUnit.test('returns a new object, does not mutate input card', function (assert) {
    var card = { interval: 6, ef: 2.5, reps: 2 };
    var original = { interval: 6, ef: 2.5, reps: 2 };
    sm2Update(card, 5);
    assert.deepEqual(card, original, 'input card should not be mutated');
  });
});


// ── 2. Answer Checking — checkTyping(userAns, answers) ───────────────────────
QUnit.module('checkTyping', function () {

  QUnit.test('exact match passes', function (assert) {
    assert.ok(checkTyping('cat', ['cat']));
  });

  QUnit.test('case-insensitive: uppercase user input passes', function (assert) {
    assert.ok(checkTyping('CAT', ['cat']));
  });

  QUnit.test('case-insensitive: uppercase answer passes', function (assert) {
    assert.ok(checkTyping('cat', ['CAT']));
  });

  QUnit.test('leading/trailing whitespace in user answer is trimmed', function (assert) {
    assert.ok(checkTyping('  cat  ', ['cat']));
  });

  QUnit.test('leading/trailing whitespace in answer entry is trimmed', function (assert) {
    assert.ok(checkTyping('cat', ['  cat  ']));
  });

  QUnit.test('wrong answer fails', function (assert) {
    assert.notOk(checkTyping('dog', ['cat']));
  });

  QUnit.test('empty user input does not match non-empty answer', function (assert) {
    assert.notOk(checkTyping('', ['cat']));
  });

  QUnit.test('slash-separated alternative: first part matches', function (assert) {
    // e.g. "sake/salmon" in the answer list
    assert.ok(checkTyping('sake', ['sake/salmon']));
  });

  QUnit.test('slash-separated alternative: second part matches', function (assert) {
    assert.ok(checkTyping('salmon', ['sake/salmon']));
  });

  QUnit.test('comma-separated alternative: first part matches', function (assert) {
    // e.g. "flower,nose" in the answer list
    assert.ok(checkTyping('flower', ['flower,nose']));
  });

  QUnit.test('comma-separated alternative: second part matches', function (assert) {
    assert.ok(checkTyping('nose', ['flower,nose']));
  });

  QUnit.test('matches any entry in a multi-answer array', function (assert) {
    assert.ok(checkTyping('bird', ['cat', 'bird', 'fish']));
  });

  QUnit.test('fails when no entry matches', function (assert) {
    assert.notOk(checkTyping('horse', ['cat', 'dog', 'fish']));
  });

  QUnit.test('alternatives matching is case-insensitive', function (assert) {
    assert.ok(checkTyping('SALMON', ['sake/salmon']));
  });

  QUnit.test('trailing punctuation in user input is ignored', function (assert) {
    assert.ok(checkTyping('hey!', ['hey']));
  });

  QUnit.test('trailing question mark in user input is ignored', function (assert) {
    assert.ok(checkTyping('hello?', ['hello']));
  });

  QUnit.test('punctuation in answer is ignored when user omits it', function (assert) {
    assert.ok(checkTyping('hello', ['hello!']));
  });

  QUnit.test('punctuation ignored for slash-separated alternatives', function (assert) {
    assert.ok(checkTyping('sake!', ['sake/salmon']));
  });
});


// ── 3. Card ID helper — cardId(type, day, idx) ───────────────────────────────
QUnit.module('cardId', function () {

  QUnit.test('vocab card: type=v', function (assert) {
    assert.equal(cardId('v', 1, 0), 'v_1_0');
  });

  QUnit.test('char card: type=c', function (assert) {
    assert.equal(cardId('c', 14, 3), 'c_14_3');
  });

  QUnit.test('large day and index', function (assert) {
    assert.equal(cardId('v', 365, 99), 'v_365_99');
  });
});


// ── 4. Adding SRS cards — addDayCards(srs, lesson) ───────────────────────────
QUnit.module('addDayCards', function () {

  var sampleLesson = {
    day: 1,
    vocab: [['いえ', 'いえ', 'house'], ['あお', 'あお', 'blue'], ['うえ', 'うえ', 'above']],
    chars: [['あ', 'a'], ['い', 'i']]
  };

  QUnit.test('adds a vocab card for each vocab entry', function (assert) {
    var result = addDayCards({}, sampleLesson);
    assert.ok(result['v_1_0'], 'vocab card 0 added');
    assert.ok(result['v_1_1'], 'vocab card 1 added');
    assert.ok(result['v_1_2'], 'vocab card 2 added');
  });

  QUnit.test('adds a char card for each char entry', function (assert) {
    var result = addDayCards({}, sampleLesson);
    assert.ok(result['c_1_0'], 'char card 0 added');
    assert.ok(result['c_1_1'], 'char card 1 added');
  });

  QUnit.test('new cards have correct initial SM-2 values', function (assert) {
    var card = addDayCards({}, sampleLesson)['v_1_0'];
    assert.equal(card.interval, 1, 'initial interval = 1');
    assert.equal(card.ef, 2.5, 'initial ef = 2.5');
    assert.equal(card.reps, 0, 'initial reps = 0');
    assert.ok(typeof card.due === 'number', 'due is a number');
  });

  QUnit.test('does NOT overwrite an existing card (guard: if !srs[id])', function (assert) {
    var existing = { interval: 10, ef: 1.8, reps: 7, due: 9999999 };
    var srs = { 'v_1_0': existing };
    var result = addDayCards(srs, sampleLesson);
    assert.deepEqual(result['v_1_0'], existing, 'existing card data must be preserved');
  });

  QUnit.test('empty vocab and chars produce no error', function (assert) {
    var result = addDayCards({}, { day: 99, vocab: [], chars: [] });
    assert.equal(Object.keys(result).length, 0, 'no cards added for empty lesson');
  });

  QUnit.test('lesson with only vocab (no chars) works', function (assert) {
    var result = addDayCards({}, { day: 50, vocab: [['ねこ', 'ねこ', 'cat']], chars: [] });
    assert.ok(result['v_50_0'], 'vocab card added');
    assert.notOk(result['c_50_0'], 'no char card added');
  });
});


// ── 5. Due card filtering — getDueCards(srs) ─────────────────────────────────
QUnit.module('getDueCards', function () {

  QUnit.test('returns cards whose due <= now', function (assert) {
    var srs = {
      'v_1_0': { due: Date.now() - 1000 },   // past  → due
      'v_1_1': { due: Date.now() + 99999 }   // future → not due
    };
    var due = getDueCards(srs);
    assert.deepEqual(due, ['v_1_0']);
  });

  QUnit.test('returns empty array when no cards are due', function (assert) {
    var srs = { 'v_1_0': { due: Date.now() + 99999 } };
    assert.equal(getDueCards(srs).length, 0);
  });

  QUnit.test('returns all cards when all are past-due', function (assert) {
    var past = Date.now() - 1000;
    var srs = {
      'v_1_0': { due: past },
      'v_1_1': { due: past },
      'c_1_0': { due: past }
    };
    assert.equal(getDueCards(srs).length, 3);
  });

  QUnit.test('returns empty array for empty srs', function (assert) {
    assert.equal(getDueCards({}).length, 0);
  });

  QUnit.test('returns card ids (strings), not card objects', function (assert) {
    var srs = { 'v_1_0': { due: Date.now() - 1 } };
    var due = getDueCards(srs);
    assert.equal(typeof due[0], 'string', 'each entry is a card ID string');
  });
});


// ── 6. Card-ID to display item — cardToItem(id, srs) ─────────────────────────
QUnit.module('cardToItem', function () {

  QUnit.test('vocab card resolves to correct fields', function (assert) {
    // Day 1, vocab[0] = ["いえ","いえ","house"]
    var item = cardToItem('v_1_0', {});
    assert.equal(item.type, 'vocab');
    assert.equal(item.front, 'いえ');
    assert.equal(item.back, 'house');
    assert.equal(item.day, 1);
  });

  QUnit.test('char card resolves to correct fields', function (assert) {
    // Day 1, chars[0] = ["あ","a"]
    var item = cardToItem('c_1_0', {});
    assert.equal(item.type, 'char');
    assert.equal(item.front, 'あ');
    assert.equal(item.back, 'a');
    assert.equal(item.day, 1);
  });

  QUnit.test('reading is null when reading equals front (pure hiragana vocab)', function (assert) {
    // Day 1 vocab[0]: front="いえ", reading="いえ" — same, so reading should be null
    var item = cardToItem('v_1_0', {});
    assert.equal(item.reading, null,
      'reading should be null when the reading string matches the front');
  });

  QUnit.test('out-of-range day index returns null', function (assert) {
    assert.equal(cardToItem('v_999_0', {}), null);
  });

  QUnit.test('out-of-range vocab index returns null', function (assert) {
    assert.equal(cardToItem('v_1_999', {}), null);
  });

  QUnit.test('out-of-range char index returns null', function (assert) {
    assert.equal(cardToItem('c_1_999', {}), null);
  });

  QUnit.test('day 0 (non-existent) returns null', function (assert) {
    assert.equal(cardToItem('v_0_0', {}), null);
  });
});


// ── 7. Array shuffle — rndShuffle(arr) ───────────────────────────────────────
QUnit.module('rndShuffle', function () {

  QUnit.test('returns an array of the same length', function (assert) {
    var arr = [1, 2, 3, 4, 5];
    assert.equal(rndShuffle(arr).length, arr.length);
  });

  QUnit.test('contains exactly the same elements', function (assert) {
    var arr = ['a', 'b', 'c', 'd'];
    var shuffled = rndShuffle(arr);
    assert.deepEqual(shuffled.slice().sort(), arr.slice().sort());
  });

  QUnit.test('does not mutate the original array', function (assert) {
    var arr = [1, 2, 3];
    var copy = arr.slice();
    rndShuffle(arr);
    assert.deepEqual(arr, copy, 'original array is unchanged');
  });

  QUnit.test('works on an empty array', function (assert) {
    assert.deepEqual(rndShuffle([]), []);
  });

  QUnit.test('works on a single-element array', function (assert) {
    assert.deepEqual(rndShuffle([42]), [42]);
  });

  QUnit.test('returns a new array (not the same reference)', function (assert) {
    var arr = [1, 2, 3];
    assert.notStrictEqual(rndShuffle(arr), arr, 'should return a new array');
  });
});


// ── 8. Exercise generation — buildExercises(lesson) ─────────────────────────
QUnit.module('buildExercises', {
  // Disable speechSynthesis so "listen" exercises are consistently excluded,
  // making test output deterministic regardless of browser support.
  beforeEach: function () {
    this._origSpeech = window.speechSynthesis;
    try { delete window.speechSynthesis; } catch (e) { window.speechSynthesis = undefined; }
  },
  afterEach: function () {
    if (this._origSpeech !== undefined) {
      window.speechSynthesis = this._origSpeech;
    }
  }
}, function () {

  QUnit.test('never returns more than 5 exercises', function (assert) {
    var lesson = curriculum[0]; // Day 1: has both chars and vocab
    var exs = buildExercises(lesson);
    assert.ok(exs.length <= 5, 'got ' + exs.length + ' exercises (max 5)');
  });

  QUnit.test('returns empty array for lesson with no vocab or chars', function (assert) {
    var exs = buildExercises({ day: 1, vocab: [], chars: [] });
    assert.equal(exs.length, 0);
  });

  QUnit.test('mc exercises have required fields: type, prompt, options, correct', function (assert) {
    var lesson = curriculum[0]; // Day 1 has chars
    var exs = buildExercises(lesson);
    exs.filter(function (e) { return e.type === 'mc'; }).forEach(function (mc) {
      assert.equal(mc.type, 'mc');
      assert.ok(mc.prompt, 'mc.prompt is non-empty');
      assert.ok(Array.isArray(mc.options), 'mc.options is an array');
      assert.ok(typeof mc.correct === 'number', 'mc.correct is a number');
    });
  });

  QUnit.test('typing exercises have a non-empty answers array', function (assert) {
    var lesson = curriculum[0];
    var exs = buildExercises(lesson);
    exs.filter(function (e) { return e.type === 'typing'; }).forEach(function (t) {
      assert.ok(Array.isArray(t.answers), 'typing.answers is an array');
      assert.ok(t.answers.length > 0, 'typing.answers is non-empty');
    });
  });

  QUnit.test('mc correct index is always within options bounds (10 runs)', function (assert) {
    var lesson = curriculum[0];
    for (var run = 0; run < 10; run++) {
      buildExercises(lesson)
        .filter(function (e) { return e.type === 'mc'; })
        .forEach(function (mc) {
          assert.ok(
            mc.correct >= 0 && mc.correct < mc.options.length,
            'correct=' + mc.correct + ' out of ' + mc.options.length + ' options'
          );
        });
    }
  });

  QUnit.test('mc options array always has at least 2 entries', function (assert) {
    var lesson = curriculum[0];
    for (var run = 0; run < 5; run++) {
      buildExercises(lesson)
        .filter(function (e) { return e.type === 'mc'; })
        .forEach(function (mc) {
          assert.ok(mc.options.length >= 2, 'mc has at least 2 options');
        });
    }
  });

  QUnit.test('vocab-only lesson produces exercises', function (assert) {
    var lesson = curriculum[29]; // Day 30: Foundations — vocab but no chars
    var exs = buildExercises(lesson);
    assert.ok(exs.length > 0, 'exercises generated for vocab-only lesson');
  });
});


// ── 9. SRS2 update — srsReview(card, quality) ────────────────────────────────
// Note: srsReview uses `ease` field (same as SM-2 `ef`).
// quality 0→3 maps to SM-2 grades [0, 3, 4, 5].
QUnit.module('srsReview', function () {

  QUnit.test('quality=0 (again) resets reps=0 and interval=1', function (assert) {
    var card = { interval: 15, ease: 2.5, reps: 5, due: 0 };
    var result = srsReview(card, 0);
    assert.equal(result.reps, 0);
    assert.equal(result.interval, 1);
  });

  QUnit.test('quality=1 (hard, grade=3): reps=0 → interval=1', function (assert) {
    var card = { interval: 1, ease: 2.5, reps: 0, due: 0 };
    var result = srsReview(card, 1);
    assert.equal(result.interval, 1);
    assert.equal(result.reps, 1);
  });

  QUnit.test('quality=1 (hard, grade=3): reps=1 → interval=6', function (assert) {
    var card = { interval: 1, ease: 2.5, reps: 1, due: 0 };
    var result = srsReview(card, 1);
    assert.equal(result.interval, 6);
    assert.equal(result.reps, 2);
  });

  QUnit.test('quality=3 (easy, grade=5) increases ease', function (assert) {
    var card = { interval: 1, ease: 2.5, reps: 0, due: 0 };
    var result = srsReview(card, 3);
    assert.ok(result.ease > 2.5, 'ease increases on quality=3 (perfect)');
  });

  QUnit.test('ease is never below 1.3', function (assert) {
    var card = { interval: 1, ease: 1.3, reps: 2, due: 0 };
    for (var i = 0; i < 5; i++) {
      card = srsReview(card, 1); // quality=1 (grade 3) decreases ease
      assert.ok(card.ease >= 1.3, 'ease must never drop below 1.3 (iteration ' + (i + 1) + ')');
    }
  });

  QUnit.test('returns a new card object (does not mutate input)', function (assert) {
    var card = { interval: 6, ease: 2.5, reps: 2, due: 0 };
    var original = { interval: 6, ease: 2.5, reps: 2, due: 0 };
    var result = srsReview(card, 3);
    assert.deepEqual(card, original, 'input card should not be mutated');
    assert.notStrictEqual(result, card, 'result should be a new object');
  });

  QUnit.test('due date is set to interval days from now', function (assert) {
    var before = Date.now();
    // reps=1 → interval becomes 6
    var card = { interval: 1, ease: 2.5, reps: 1, due: 0 };
    var result = srsReview(card, 1); // grade 3
    var after = Date.now();
    var msPerDay = 86400000;
    assert.ok(
      result.due >= before + 6 * msPerDay && result.due <= after + 6 * msPerDay,
      'due is approximately 6 days from now'
    );
  });
});


// ── 10. srsAddCards(dayLesson, cards) ────────────────────────────────────────
QUnit.module('srsAddCards', function () {

  var sampleLesson = {
    day: 5,
    vocab: [['ねこ', 'ねこ', 'cat'], ['いぬ', 'いぬ', 'dog']],
    chars: [['な', 'na'], ['に', 'ni']]
  };

  QUnit.test('adds vocab cards with embedded front/back/reading', function (assert) {
    var cards = {};
    srsAddCards(sampleLesson, cards);
    var card = cards['v_5_0'];
    assert.ok(card, 'vocab card 0 added');
    assert.equal(card.front, 'ねこ');
    assert.equal(card.back, 'cat');
    assert.equal(card.type, 'vocab');
  });

  QUnit.test('adds char cards with embedded front/back', function (assert) {
    var cards = {};
    srsAddCards(sampleLesson, cards);
    var card = cards['c_5_0'];
    assert.ok(card, 'char card 0 added');
    assert.equal(card.front, 'な');
    assert.equal(card.back, 'na');
    assert.equal(card.type, 'char');
  });

  QUnit.test('new cards start with interval=1, ease=2.5, reps=0', function (assert) {
    var cards = {};
    srsAddCards(sampleLesson, cards);
    var card = cards['v_5_0'];
    assert.equal(card.interval, 1);
    assert.equal(card.ease, 2.5);
    assert.equal(card.reps, 0);
  });

  QUnit.test('does not overwrite an existing card', function (assert) {
    var existing = { interval: 14, ease: 1.9, reps: 8, due: 42, front: 'ねこ', back: 'cat', type: 'vocab', id: 'v_5_0' };
    var cards = { 'v_5_0': existing };
    srsAddCards(sampleLesson, cards);
    assert.deepEqual(cards['v_5_0'], existing, 'existing card data must be preserved');
  });

  QUnit.test('returns true when new cards were added', function (assert) {
    var changed = srsAddCards(sampleLesson, {});
    assert.equal(changed, true);
  });

  QUnit.test('returns false when all cards already exist', function (assert) {
    var cards = {};
    srsAddCards(sampleLesson, cards); // first call adds them
    var changed = srsAddCards(sampleLesson, cards); // second call: nothing new
    assert.equal(changed, false);
  });
});


// ── 11. srsDueCards(cards) ───────────────────────────────────────────────────
QUnit.module('srsDueCards', function () {

  QUnit.test('returns card objects (not IDs) that are due', function (assert) {
    var pastCard = { id: 'v_1_0', due: Date.now() - 1000 };
    var futureCard = { id: 'v_1_1', due: Date.now() + 99999 };
    var result = srsDueCards({ 'v_1_0': pastCard, 'v_1_1': futureCard });
    assert.equal(result.length, 1);
    assert.deepEqual(result[0], pastCard);
  });

  QUnit.test('returns empty array when no cards are due', function (assert) {
    var cards = { 'v_1_0': { due: Date.now() + 99999 } };
    assert.equal(srsDueCards(cards).length, 0);
  });

  QUnit.test('returns empty array for empty cards object', function (assert) {
    assert.equal(srsDueCards({}).length, 0);
  });

  QUnit.test('returns all cards when all are overdue', function (assert) {
    var past = Date.now() - 1000;
    var cards = {
      'v_1_0': { due: past },
      'v_1_1': { due: past },
      'c_1_0': { due: past }
    };
    assert.equal(srsDueCards(cards).length, 3);
  });
});


// ── 12. Curriculum Data Integrity ────────────────────────────────────────────
QUnit.module('curriculum data integrity', function () {

  QUnit.test('curriculum is not empty', function (assert) {
    assert.ok(curriculum.length >= 1720, 'should have at least 1720 lessons (N5 through N1 complete)');
  });

  QUnit.test('day numbers are sequential from 1', function (assert) {
    var failures = [];
    curriculum.forEach(function (lesson, i) {
      if (lesson.day !== i + 1) {
        failures.push('index ' + i + ' has day=' + lesson.day + ', expected ' + (i + 1));
      }
    });
    assert.equal(failures.length, 0, failures.join('; '));
  });

  QUnit.test('no duplicate day numbers', function (assert) {
    var days = curriculum.map(function (l) { return l.day; });
    var unique = new Set(days);
    assert.equal(unique.size, curriculum.length, 'all day numbers should be unique');
  });

  QUnit.test('every lesson has non-empty required string fields', function (assert) {
    var required = ['title', 'type', 'intro', 'practice', 'tip'];
    var failures = [];
    curriculum.forEach(function (lesson) {
      required.forEach(function (field) {
        if (!lesson[field] || typeof lesson[field] !== 'string' || !lesson[field].trim()) {
          failures.push('day ' + lesson.day + ' missing/empty: ' + field);
        }
      });
    });
    assert.equal(failures.length, 0, failures.join('\n'));
  });

  QUnit.test('type field is always a known value', function (assert) {
    // All types legitimately used in the curriculum — 'numbers', 'particles', 'verbs'
    // are distinct sub-types under the Foundations / Verbs phases.
    // A non-string type value (e.g. an array) will never match and will be flagged here.
    var validTypes = new Set(['script', 'lesson', 'grammar', 'kanji', 'review',
                              'numbers', 'particles', 'verbs', 'vocab', 'reading']);
    var failures = [];
    curriculum.forEach(function (lesson) {
      if (!validTypes.has(lesson.type)) {
        failures.push('day ' + lesson.day + ' has unknown type: ' + lesson.type);
      }
    });
    assert.equal(failures.length, 0, failures.join('\n'));
  });

  QUnit.test('vocab entries are always 3-element arrays with non-empty jp and meaning', function (assert) {
    var failures = [];
    curriculum.forEach(function (lesson) {
      (lesson.vocab || []).forEach(function (v, i) {
        if (!Array.isArray(v) || v.length !== 3) {
          failures.push('day ' + lesson.day + ' vocab[' + i + '] wrong length');
          return;
        }
        if (!v[0] || !v[0].trim()) {
          failures.push('day ' + lesson.day + ' vocab[' + i + '][0] (jp) is empty');
        }
        if (!v[2] || !v[2].trim()) {
          failures.push('day ' + lesson.day + ' vocab[' + i + '][2] (meaning) is empty');
        }
      });
    });
    assert.equal(failures.length, 0, failures.join('\n'));
  });

  QUnit.test('chars entries are always 2-element arrays with non-empty char and reading', function (assert) {
    var failures = [];
    curriculum.forEach(function (lesson) {
      (lesson.chars || []).forEach(function (c, i) {
        if (!Array.isArray(c) || c.length !== 2) {
          failures.push('day ' + lesson.day + ' chars[' + i + '] wrong length');
          return;
        }
        if (!c[0] || !c[0].trim()) {
          failures.push('day ' + lesson.day + ' chars[' + i + '][0] (char) is empty');
        }
        if (!c[1] || !c[1].trim()) {
          failures.push('day ' + lesson.day + ' chars[' + i + '][1] (reading) is empty');
        }
      });
    });
    assert.equal(failures.length, 0, failures.join('\n'));
  });

  QUnit.test('phase numbers are integers from 1 to 32', function (assert) {
    var failures = [];
    curriculum.forEach(function (lesson) {
      if (typeof lesson.phaseNum !== 'number' || lesson.phaseNum < 1 || lesson.phaseNum > 32) {
        failures.push('day ' + lesson.day + ' phaseNum=' + lesson.phaseNum);
      }
    });
    assert.equal(failures.length, 0, failures.join('\n'));
  });

  QUnit.test('week numbers are integers from 1 to 246', function (assert) {
    var failures = [];
    curriculum.forEach(function (lesson) {
      if (typeof lesson.week !== 'number' || lesson.week < 1 || lesson.week > 246) {
        failures.push('day ' + lesson.day + ' week=' + lesson.week);
      }
    });
    assert.equal(failures.length, 0, failures.join('\n'));
  });

  QUnit.test('lessons of type "script" always have at least one char', function (assert) {
    var failures = [];
    curriculum.filter(function (l) { return l.type === 'script'; }).forEach(function (lesson) {
      if (!lesson.chars || lesson.chars.length === 0) {
        failures.push('day ' + lesson.day + ' (type=script) has no chars');
      }
    });
    assert.equal(failures.length, 0, failures.join('\n'));
  });

  QUnit.test('Hiragana phase covers days 1-14 (phaseNum=1)', function (assert) {
    var hira = curriculum.slice(0, 14);
    var failures = hira.filter(function (l) { return l.phaseNum !== 1; })
                       .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-1: ' + failures.join(', '));
  });

  QUnit.test('Katakana phase covers days 15-28 (phaseNum=2)', function (assert) {
    var kata = curriculum.slice(14, 28);
    var failures = kata.filter(function (l) { return l.phaseNum !== 2; })
                       .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-2: ' + failures.join(', '));
  });

  QUnit.test('day 365, 960, 1320, and 1720 exist', function (assert) {
    assert.equal(curriculum[364].day, 365, 'day 365 exists');
    assert.equal(curriculum[659].day, 660, 'day 660 exists');
    assert.equal(curriculum[959].day, 960, 'day 960 exists');
    assert.equal(curriculum[1319].day, 1320, 'day 1320 exists');
    assert.equal(curriculum[curriculum.length - 1].day, 1720, 'last day is 1720');
  });

  QUnit.test('phaseName matches phaseNum for all lessons', function (assert) {
    var phaseMap = {
      1: 'Hiragana', 2: 'Katakana', 3: 'Foundations',
      4: 'Vocabulary', 5: 'Verbs', 6: 'Grammar',
      7: 'Kanji', 8: 'Test Prep', 9: 'N5 Review',
      10: 'N4 Vocabulary', 11: 'N4 Verbs', 12: 'N4 Grammar',
      13: 'N4 Kanji', 14: 'N4 Test Prep',
      15: 'N4 Review', 16: 'N3 Vocabulary', 17: 'N3 Verbs & Adjectives',
      18: 'N3 Grammar', 19: 'N3 Kanji', 20: 'N3 Test Prep',
      21: 'N3 Review', 22: 'N2 Vocabulary', 23: 'N2 Verbs & Expressions',
      24: 'N2 Grammar', 25: 'N2 Kanji', 26: 'N2 Test Prep',
      27: 'N2 Review', 28: 'N1 Vocabulary', 29: 'N1 Verbs & Expressions',
      30: 'N1 Grammar', 31: 'N1 Kanji', 32: 'N1 Test Prep'
    };
    var failures = [];
    curriculum.forEach(function (lesson) {
      var expected = phaseMap[lesson.phaseNum];
      if (expected && lesson.phaseName !== expected) {
        failures.push('day ' + lesson.day + ': phaseNum=' + lesson.phaseNum +
          ' but phaseName="' + lesson.phaseName + '" (expected "' + expected + '")');
      }
    });
    assert.equal(failures.length, 0, failures.join('\n'));
  });

  QUnit.test('N5 Review phase covers days 366-395 (phaseNum=9)', function (assert) {
    var phase9 = curriculum.slice(365, 395);
    var failures = phase9.filter(function (l) { return l.phaseNum !== 9; })
                         .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-9: ' + failures.join(', '));
  });

  QUnit.test('N4 Vocabulary phase covers days 396-455 (phaseNum=10)', function (assert) {
    var phase10 = curriculum.slice(395, 455);
    var failures = phase10.filter(function (l) { return l.phaseNum !== 10; })
                          .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-10: ' + failures.join(', '));
  });

  QUnit.test('N4 Verbs phase covers days 456-500 (phaseNum=11)', function (assert) {
    var phase11 = curriculum.slice(455, 500);
    var failures = phase11.filter(function (l) { return l.phaseNum !== 11; })
                          .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-11: ' + failures.join(', '));
  });

  QUnit.test('N4 Grammar phase covers days 501-555 (phaseNum=12)', function (assert) {
    var phase12 = curriculum.slice(500, 555);
    var failures = phase12.filter(function (l) { return l.phaseNum !== 12; })
                          .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-12: ' + failures.join(', '));
  });

  QUnit.test('N4 Kanji phase covers days 556-620 (phaseNum=13)', function (assert) {
    var phase13 = curriculum.slice(555, 620);
    var failures = phase13.filter(function (l) { return l.phaseNum !== 13; })
                          .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-13: ' + failures.join(', '));
  });

  QUnit.test('N4 Test Prep phase covers days 621-660 (phaseNum=14)', function (assert) {
    var phase14 = curriculum.slice(620, 660);
    var failures = phase14.filter(function (l) { return l.phaseNum !== 14; })
                          .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-14: ' + failures.join(', '));
  });

  // N3 phase range tests
  QUnit.test('N4 Review phase covers days 661-690 (phaseNum=15)', function (assert) {
    var phase = curriculum.slice(660, 690);
    var failures = phase.filter(function (l) { return l.phaseNum !== 15; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-15: ' + failures.join(', '));
  });

  QUnit.test('N3 Vocabulary phase covers days 691-770 (phaseNum=16)', function (assert) {
    var phase = curriculum.slice(690, 770);
    var failures = phase.filter(function (l) { return l.phaseNum !== 16; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-16: ' + failures.join(', '));
  });

  QUnit.test('N3 Verbs & Adjectives phase covers days 771-820 (phaseNum=17)', function (assert) {
    var phase = curriculum.slice(770, 820);
    var failures = phase.filter(function (l) { return l.phaseNum !== 17; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-17: ' + failures.join(', '));
  });

  QUnit.test('N3 Grammar phase covers days 821-895 (phaseNum=18)', function (assert) {
    var phase = curriculum.slice(820, 895);
    var failures = phase.filter(function (l) { return l.phaseNum !== 18; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-18: ' + failures.join(', '));
  });

  QUnit.test('N3 Kanji phase covers days 896-930 (phaseNum=19)', function (assert) {
    var phase = curriculum.slice(895, 930);
    var failures = phase.filter(function (l) { return l.phaseNum !== 19; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-19: ' + failures.join(', '));
  });

  QUnit.test('N3 Test Prep phase covers days 931-960 (phaseNum=20)', function (assert) {
    var phase = curriculum.slice(930, 960);
    var failures = phase.filter(function (l) { return l.phaseNum !== 20; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-20: ' + failures.join(', '));
  });

  // Level boundary tests
  QUnit.test('JLPT level day ranges do not overlap', function (assert) {
    var levels = [
      { name: 'N5', start: 1, end: 365 },
      { name: 'N4', start: 366, end: 660 },
      { name: 'N3', start: 661, end: 960 },
      { name: 'N2', start: 961, end: 1320 },
      { name: 'N1', start: 1321, end: 1720 }
    ];
    for (var i = 0; i < levels.length - 1; i++) {
      assert.ok(levels[i].end < levels[i + 1].start,
        levels[i].name + ' ends at ' + levels[i].end + ' before ' + levels[i + 1].name + ' starts at ' + levels[i + 1].start);
    }
    assert.equal(levels[levels.length - 1].end, 1720, 'N1 ends at day 1720');
  });

  // N2 phase range tests
  QUnit.test('N3 Review phase covers days 961-990 (phaseNum=21)', function (assert) {
    var phase = curriculum.slice(960, 990);
    var failures = phase.filter(function (l) { return l.phaseNum !== 21; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-21: ' + failures.join(', '));
  });

  QUnit.test('N2 Vocabulary phase covers days 991-1090 (phaseNum=22)', function (assert) {
    var phase = curriculum.slice(990, 1090);
    var failures = phase.filter(function (l) { return l.phaseNum !== 22; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-22: ' + failures.join(', '));
  });

  QUnit.test('N2 Verbs & Expressions phase covers days 1091-1140 (phaseNum=23)', function (assert) {
    var phase = curriculum.slice(1090, 1140);
    var failures = phase.filter(function (l) { return l.phaseNum !== 23; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-23: ' + failures.join(', '));
  });

  QUnit.test('N2 Grammar phase covers days 1141-1230 (phaseNum=24)', function (assert) {
    var phase = curriculum.slice(1140, 1230);
    var failures = phase.filter(function (l) { return l.phaseNum !== 24; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-24: ' + failures.join(', '));
  });

  QUnit.test('N2 Kanji phase covers days 1231-1275 (phaseNum=25)', function (assert) {
    var phase = curriculum.slice(1230, 1275);
    var failures = phase.filter(function (l) { return l.phaseNum !== 25; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-25: ' + failures.join(', '));
  });

  QUnit.test('N2 Test Prep phase covers days 1276-1320 (phaseNum=26)', function (assert) {
    var phase = curriculum.slice(1275, 1320);
    var failures = phase.filter(function (l) { return l.phaseNum !== 26; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-26: ' + failures.join(', '));
  });

  // N1 phase range tests
  QUnit.test('N2 Review phase covers days 1321-1350 (phaseNum=27)', function (assert) {
    var phase = curriculum.slice(1320, 1350);
    var failures = phase.filter(function (l) { return l.phaseNum !== 27; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-27: ' + failures.join(', '));
  });

  QUnit.test('N1 Vocabulary phase covers days 1351-1470 (phaseNum=28)', function (assert) {
    var phase = curriculum.slice(1350, 1470);
    var failures = phase.filter(function (l) { return l.phaseNum !== 28; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-28: ' + failures.join(', '));
  });

  QUnit.test('N1 Verbs & Expressions phase covers days 1471-1530 (phaseNum=29)', function (assert) {
    var phase = curriculum.slice(1470, 1530);
    var failures = phase.filter(function (l) { return l.phaseNum !== 29; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-29: ' + failures.join(', '));
  });

  QUnit.test('N1 Grammar phase covers days 1531-1640 (phaseNum=30)', function (assert) {
    var phase = curriculum.slice(1530, 1640);
    var failures = phase.filter(function (l) { return l.phaseNum !== 30; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-30: ' + failures.join(', '));
  });

  QUnit.test('N1 Kanji phase covers days 1641-1690 (phaseNum=31)', function (assert) {
    var phase = curriculum.slice(1640, 1690);
    var failures = phase.filter(function (l) { return l.phaseNum !== 31; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-31: ' + failures.join(', '));
  });

  QUnit.test('N1 Test Prep phase covers days 1691-1720 (phaseNum=32)', function (assert) {
    var phase = curriculum.slice(1690, 1720);
    var failures = phase.filter(function (l) { return l.phaseNum !== 32; })
                        .map(function (l) { return 'day ' + l.day; });
    assert.equal(failures.length, 0, 'Non-phase-32: ' + failures.join(', '));
  });
});

// ── Phase constants ───────────────────────────────────────────────────────────
QUnit.module('phase constants', function () {
  var EXPECTED_PHASES = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32];
  var EXPECTED_NAMES = {
    1: 'Hiragana', 2: 'Katakana', 3: 'Foundations',
    4: 'Vocabulary', 5: 'Verbs', 6: 'Grammar',
    7: 'Kanji', 8: 'Test Prep', 9: 'N5 Review',
    10: 'N4 Vocabulary', 11: 'N4 Verbs', 12: 'N4 Grammar',
    13: 'N4 Kanji', 14: 'N4 Test Prep',
    15: 'N4 Review', 16: 'N3 Vocabulary', 17: 'N3 Verbs & Adjectives',
    18: 'N3 Grammar', 19: 'N3 Kanji', 20: 'N3 Test Prep',
    21: 'N3 Review', 22: 'N2 Vocabulary', 23: 'N2 Verbs & Expressions',
    24: 'N2 Grammar', 25: 'N2 Kanji', 26: 'N2 Test Prep',
    27: 'N2 Review', 28: 'N1 Vocabulary', 29: 'N1 Verbs & Expressions',
    30: 'N1 Grammar', 31: 'N1 Kanji', 32: 'N1 Test Prep'
  };

  QUnit.test('PHASE_COLORS is defined with all 32 phase keys', function (assert) {
    assert.ok(typeof PHASE_COLORS === 'object' && PHASE_COLORS !== null, 'PHASE_COLORS exists');
    EXPECTED_PHASES.forEach(function (p) {
      assert.ok(typeof PHASE_COLORS[p] === 'string' && PHASE_COLORS[p].length > 0,
        'PHASE_COLORS[' + p + '] is a non-empty string');
    });
  });