vyndr/tests/unit/pricedLines.test.js

/* ============================================================
   Session 79 — priced-line surfacer + no-market empty state.
   NON-FABRICATING: only real snapshot lines with a real book price surface.
   ============================================================ */

const { indexPricedLines, pricedLinesFor } = require('../../web/src/lib/pricedLines');

const GRADES = [
  { player_name: 'Gabriel Arias', stat_type: 'hits', line: 0.5, direction: 'over', book_odds: -165, fair_odds: -140 },
  { player_name: 'Ryan Jeffers', stat_type: 'hits', line: 1.5, direction: 'under', book_odds: -160, fair_odds: -135 },
  { player_name: 'Chase DeLauter', stat_type: 'doubles', line: 0.5, direction: 'over', book_odds: 340, fair_odds: 370 },
  // no market → must NOT surface
  { player_name: 'No Market Guy', stat_type: 'hits', line: 0.5, direction: 'over', book_odds: null },
];

describe('indexPricedLines — only real, priced rows', () => {
  it('indexes a priced row by player+stat', () => {
    const idx = indexPricedLines(GRADES);
    const rows = pricedLinesFor(idx, 'Gabriel Arias', 'hits');
    expect(rows).toEqual([{ line: 0.5, direction: 'over', book_odds: -165 }]);
  });

  it('EXCLUDES a graded row with no book price — not a surfaceable line', () => {
    const idx = indexPricedLines(GRADES);
    expect(pricedLinesFor(idx, 'No Market Guy', 'hits')).toEqual([]);
  });

  it('a DIFFERENT stat priced for the same player returns nothing for the picked stat', () => {
    const idx = indexPricedLines(GRADES);
    // DeLauter has doubles priced, NOT hits.
    expect(pricedLinesFor(idx, 'Chase DeLauter', 'hits')).toEqual([]);
    expect(pricedLinesFor(idx, 'Chase DeLauter', 'doubles')).toHaveLength(1);
  });

  it('an off-slate player returns nothing — never a nearest/suggested line', () => {
    const idx = indexPricedLines(GRADES);
    expect(pricedLinesFor(idx, 'Aaron Judge', 'hits')).toEqual([]);
  });

  it('resolves name variants via nameKey (A.J. / AJ)', () => {
    const idx = indexPricedLines([{ player_name: 'A.J. Ewing', stat_type: 'hits', line: 0.5, direction: 'over', book_odds: -110 }]);
    expect(pricedLinesFor(idx, 'AJ Ewing', 'hits')).toHaveLength(1);
  });

  it('sorts multiple priced lines by line', () => {
    const idx = indexPricedLines([
      { player_name: 'X', stat_type: 'hits', line: 1.5, direction: 'over', book_odds: 120 },
      { player_name: 'X', stat_type: 'hits', line: 0.5, direction: 'over', book_odds: -150 },
    ]);
    expect(pricedLinesFor(idx, 'X', 'hits').map((r) => r.line)).toEqual([0.5, 1.5]);
  });

  it('never fabricates on empty/garbage input', () => {
    expect(pricedLinesFor(indexPricedLines([]), 'X', 'hits')).toEqual([]);
    expect(pricedLinesFor(indexPricedLines(null), 'X', 'hits')).toEqual([]);
    expect(pricedLinesFor(null, 'X', 'hits')).toEqual([]);
  });

  it('dedupes a repeated line+side', () => {
    const idx = indexPricedLines([
      { player_name: 'X', stat_type: 'hits', line: 0.5, direction: 'over', book_odds: -150 },
      { player_name: 'X', stat_type: 'hits', line: 0.5, direction: 'over', book_odds: -150 },
    ]);
    expect(pricedLinesFor(idx, 'X', 'hits')).toHaveLength(1);
  });
});

describe('the empty state + surfacer are independently reversible', () => {
  const fs = require('fs');
  it('the working card/join/triplet are untouched (Scan A byte-identical)', () => {
    // These files must NOT reference the new empty-state — proving the new UI is
    // additive and removable without touching the working path.
    const card = fs.readFileSync(require.resolve('../../web/src/components/vyndr/GradeResultCard.tsx'), 'utf8');
    const route = fs.readFileSync(require.resolve('../../web/src/app/api/scan/route.ts'), 'utf8');
    expect(card).not.toMatch(/NoMarketState/);
    expect(route).not.toMatch(/NoMarketState|pricedLines/);
  });

  it('the empty state lives entirely in the scan page + its own component', () => {
    const page = fs.readFileSync(require.resolve('../../web/src/app/scan/page.tsx'), 'utf8');
    expect(page).toMatch(/NoMarketState/);
    expect(page).toMatch(/result\.book_odds == null \|\| result\.fair_odds == null/);
  });
});

describe('Session 80 — freshness + reversible gate (scan page wiring)', () => {
  const fs = require('fs');
  const src = fs.readFileSync(require.resolve('../../web/src/app/scan/page.tsx'), 'utf8');

  it('re-fetches on selection change when the held snapshot is stale', () => {
    // The Session-79 gap: the fetch depended on [sport] only, so a long-open
    // page showed hour-stale priced lines. Now a stale index re-fetches at use.
    expect(src).toMatch(/Date\.now\(\) - pricedFetchedAt > PRICED_STALE_MS/);
    expect(src).toMatch(/\}, \[selectedPlayer, stat\]\)/);
  });

  it('also refreshes on window focus for a long-open page', () => {
    expect(src).toMatch(/addEventListener\('focus', onFocus\)/);
  });

  it('STALE_MS matches the /api/snapshot cache (no over-fetching)', () => {
    expect(src).toMatch(/PRICED_STALE_MS = 30_000/);
  });

  it('the whole nudge is behind ONE reversible gate flag', () => {
    expect(src).toMatch(/const PRICED_NUDGE_ENABLED = true/);
    // the surfaced set is empty when the gate is off → S6 link-only fallback
    expect(src).toMatch(/PRICED_NUDGE_ENABLED && pricedIndex && selectedPlayer/);
  });

  it('clears the index on sport change (never shows the old sport lines)', () => {
    expect(src).toMatch(/setPricedIndex\(null\);\s*\n\s*setPricedFetchedAt\(0\);\s*\n\s*refreshPriced\(\);/);
  });
});