brackt/app/services/standings-sync/__tests__/mlb.test.ts
chrisp add196902b
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Fix MLB standings 406 error and refactor ESPN adapter shared code (#62)
## Summary

- **Root cause**: `statsapi.mlb.com` returns 406 (deprecated). Switched MLB to ESPN's free standings API (`site.api.espn.com/apis/v2/sports/baseball/mlb/standings`), consistent with NBA, WNBA, and MLS.
- **Refactor**: Extracted a shared `espn.ts` utility module, eliminating 4× duplication of `statsMap()`, `flattenEspnStandings()`, ESPN interfaces, and the `playoffSeed` → conference rank logic across adapters.
- **Bug fixes** found during review and applied across all affected adapters:
  - `parseConferenceRank`: `|| undefined` falsy-zero bug replaced with `isNaN` guard
  - Sort comparators: stable alphabetical tiebreaker added to MLB, NBA, WNBA
  - `winPct`: falls back to `wins/(wins+losses)` if ESPN omits the stat (was silently 0)
  - statsMap pre-built once per entry before sorting in all adapters (was rebuilt per comparison)
  - WNBA `parseEntry`: accepts pre-computed `sm` instead of rebuilding it internally
  - MLB `gamesBack`: tests updated to reflect ESPN returns numeric `0` for division leaders (old API used `"-"` → `undefined`)

## Test plan

- [ ] All 60 standings-sync unit tests pass (`npm run test:run -- app/services/standings-sync`)
- [ ] Trigger MLB standings sync from admin panel and confirm it returns data without a 406
- [ ] Confirm NBA, WNBA, MLS syncs still work (adapters touched but behaviour unchanged)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Chris Parsons <chrisparsons1127@gmail.com>
Reviewed-on: #62
2026-06-01 03:31:18 +00:00

318 lines
10 KiB
TypeScript

import { describe, it, expect, vi, beforeEach } from "vitest";
import { MlbStandingsAdapter } from "../mlb";
// Minimal ESPN-shaped response: AL East + NL East with a few teams
const SAMPLE_ESPN_RESPONSE = {
children: [
{
name: "American League",
children: [
{
name: "American League East",
standings: {
entries: [
{
team: { id: "2", displayName: "Baltimore Orioles" },
stats: [
{ name: "wins", value: 47 },
{ name: "losses", value: 34 },
{ name: "winPercent", value: 0.58 },
{ name: "gamesBehind", value: 0 },
{ name: "streak", displayValue: "W3" },
{ name: "Home", displayValue: "24-15" },
{ name: "Road", displayValue: "23-19" },
{ name: "Last Ten Games", displayValue: "7-3" },
{ name: "playoffSeed", value: 1 },
],
},
{
team: { id: "3", displayName: "Boston Red Sox" },
stats: [
{ name: "wins", value: 42 },
{ name: "losses", value: 39 },
{ name: "winPercent", value: 0.519 },
{ name: "gamesBehind", value: 5.0 },
{ name: "streak", displayValue: "L2" },
{ name: "Home", displayValue: "22-18" },
{ name: "Road", displayValue: "20-21" },
{ name: "Last Ten Games", displayValue: "4-6" },
{ name: "playoffSeed", value: 2 },
],
},
],
},
},
],
},
{
name: "National League",
children: [
{
name: "National League East",
standings: {
entries: [
{
team: { id: "21", displayName: "New York Mets" },
stats: [
{ name: "wins", value: 43 },
{ name: "losses", value: 38 },
{ name: "winPercent", value: 0.531 },
{ name: "gamesBehind", value: 0 },
{ name: "streak", displayValue: "W1" },
{ name: "Home", displayValue: "22-17" },
{ name: "Road", displayValue: "21-21" },
{ name: "Last Ten Games", displayValue: "6-4" },
{ name: "playoffSeed", value: 1 },
],
},
],
},
},
],
},
],
};
describe("MlbStandingsAdapter", () => {
beforeEach(() => {
vi.stubGlobal("fetch", vi.fn());
});
it("maps AL teams to conference 'AL'", async () => {
vi.mocked(fetch).mockResolvedValueOnce({
ok: true,
json: async () => SAMPLE_ESPN_RESPONSE,
} as Response);
const adapter = new MlbStandingsAdapter();
const records = await adapter.fetchStandings();
const ori = records.find((r) => r.teamName === "Baltimore Orioles");
expect(ori?.conference).toBe("AL");
});
it("maps NL teams to conference 'NL'", async () => {
vi.mocked(fetch).mockResolvedValueOnce({
ok: true,
json: async () => SAMPLE_ESPN_RESPONSE,
} as Response);
const adapter = new MlbStandingsAdapter();
const records = await adapter.fetchStandings();
const mets = records.find((r) => r.teamName === "New York Mets");
expect(mets?.conference).toBe("NL");
});
it("maps division names correctly", async () => {
vi.mocked(fetch).mockResolvedValueOnce({
ok: true,
json: async () => SAMPLE_ESPN_RESPONSE,
} as Response);
const adapter = new MlbStandingsAdapter();
const records = await adapter.fetchStandings();
const ori = records.find((r) => r.teamName === "Baltimore Orioles");
const mets = records.find((r) => r.teamName === "New York Mets");
expect(ori?.division).toBe("AL East");
expect(mets?.division).toBe("NL East");
});
it("maps wins, losses, gamesPlayed, and winPct", async () => {
vi.mocked(fetch).mockResolvedValueOnce({
ok: true,
json: async () => SAMPLE_ESPN_RESPONSE,
} as Response);
const adapter = new MlbStandingsAdapter();
const records = await adapter.fetchStandings();
const ori = records.find((r) => r.teamName === "Baltimore Orioles");
expect(ori?.wins).toBe(47);
expect(ori?.losses).toBe(34);
expect(ori?.gamesPlayed).toBe(81);
expect(ori?.winPct).toBeCloseTo(0.58, 2);
});
it("formats streak as 'W3' or 'L2'", async () => {
vi.mocked(fetch).mockResolvedValueOnce({
ok: true,
json: async () => SAMPLE_ESPN_RESPONSE,
} as Response);
const adapter = new MlbStandingsAdapter();
const records = await adapter.fetchStandings();
const ori = records.find((r) => r.teamName === "Baltimore Orioles");
const bos = records.find((r) => r.teamName === "Boston Red Sox");
expect(ori?.streak).toBe("W3");
expect(bos?.streak).toBe("L2");
});
it("extracts lastTen from Last Ten Games stat", async () => {
vi.mocked(fetch).mockResolvedValueOnce({
ok: true,
json: async () => SAMPLE_ESPN_RESPONSE,
} as Response);
const adapter = new MlbStandingsAdapter();
const records = await adapter.fetchStandings();
const ori = records.find((r) => r.teamName === "Baltimore Orioles");
expect(ori?.lastTen).toBe("7-3");
});
it("gamesBack is 0 for the division leader (ESPN returns numeric 0, not '-')", async () => {
vi.mocked(fetch).mockResolvedValueOnce({
ok: true,
json: async () => SAMPLE_ESPN_RESPONSE,
} as Response);
const adapter = new MlbStandingsAdapter();
const records = await adapter.fetchStandings();
const ori = records.find((r) => r.teamName === "Baltimore Orioles");
expect(ori?.gamesBack).toBe(0);
});
it("gamesBack is a positive number for non-leaders", async () => {
vi.mocked(fetch).mockResolvedValueOnce({
ok: true,
json: async () => SAMPLE_ESPN_RESPONSE,
} as Response);
const adapter = new MlbStandingsAdapter();
const records = await adapter.fetchStandings();
const bos = records.find((r) => r.teamName === "Boston Red Sox");
expect(bos?.gamesBack).toBeCloseTo(5.0, 1);
});
it("extracts homeRecord and awayRecord", async () => {
vi.mocked(fetch).mockResolvedValueOnce({
ok: true,
json: async () => SAMPLE_ESPN_RESPONSE,
} as Response);
const adapter = new MlbStandingsAdapter();
const records = await adapter.fetchStandings();
const ori = records.find((r) => r.teamName === "Baltimore Orioles");
expect(ori?.homeRecord).toBe("24-15");
expect(ori?.awayRecord).toBe("23-19");
});
it("computes leagueRank sorted by wins desc across all teams", async () => {
vi.mocked(fetch).mockResolvedValueOnce({
ok: true,
json: async () => SAMPLE_ESPN_RESPONSE,
} as Response);
const adapter = new MlbStandingsAdapter();
const records = await adapter.fetchStandings();
// Baltimore (47W) should rank #1 overall, Boston (42W) should rank #2
const ori = records.find((r) => r.teamName === "Baltimore Orioles");
const bos = records.find((r) => r.teamName === "Boston Red Sox");
expect(ori?.leagueRank).toBe(1);
expect(bos?.leagueRank).toBeGreaterThan(1);
});
it("uses ESPN string team id as externalTeamId", async () => {
vi.mocked(fetch).mockResolvedValueOnce({
ok: true,
json: async () => SAMPLE_ESPN_RESPONSE,
} as Response);
const adapter = new MlbStandingsAdapter();
const records = await adapter.fetchStandings();
const ori = records.find((r) => r.teamName === "Baltimore Orioles");
expect(ori?.externalTeamId).toBe("2");
});
it("never sets otLosses (MLB has no OT losses)", async () => {
vi.mocked(fetch).mockResolvedValueOnce({
ok: true,
json: async () => SAMPLE_ESPN_RESPONSE,
} as Response);
const adapter = new MlbStandingsAdapter();
const records = await adapter.fetchStandings();
for (const record of records) {
expect(record.otLosses).toBeUndefined();
}
});
it("throws on non-ok HTTP response", async () => {
vi.mocked(fetch).mockResolvedValueOnce({
ok: false,
status: 406,
statusText: "Not Acceptable",
} as Response);
const adapter = new MlbStandingsAdapter();
await expect(adapter.fetchStandings()).rejects.toThrow("406");
});
it("produces a stable leagueRank when two teams are tied on wins and losses", async () => {
const tiedResponse = {
children: [
{
name: "American League",
children: [
{
name: "American League East",
standings: {
entries: [
{
team: { id: "99", displayName: "Z Team" },
stats: [
{ name: "wins", value: 40 },
{ name: "losses", value: 40 },
{ name: "winPercent", value: 0.5 },
],
},
{
team: { id: "98", displayName: "A Team" },
stats: [
{ name: "wins", value: 40 },
{ name: "losses", value: 40 },
{ name: "winPercent", value: 0.5 },
],
},
],
},
},
],
},
],
};
vi.mocked(fetch).mockResolvedValueOnce({
ok: true,
json: async () => tiedResponse,
} as Response);
const adapter = new MlbStandingsAdapter();
const records = await adapter.fetchStandings();
// Tiebreaker is alphabetical — "A Team" should always rank above "Z Team"
const aTeam = records.find((r) => r.teamName === "A Team");
const zTeam = records.find((r) => r.teamName === "Z Team");
expect(aTeam?.leagueRank).toBe(1);
expect(zTeam?.leagueRank).toBe(2);
});
it("throws when response has no entries", async () => {
vi.mocked(fetch).mockResolvedValueOnce({
ok: true,
json: async () => ({ children: [] }),
} as Response);
const adapter = new MlbStandingsAdapter();
await expect(adapter.fetchStandings()).rejects.toThrow();
});
});