functional

src/sanity.test.ts

@@ -0,0 +1,59 @@
+import { describe, it, expect } from "vitest";
+import rawConfig from "./config.json";
+import { loadConfig } from "./configLoader";
+import { estimate } from "./engine";
+import { parseISODate } from "./dates";
+
+describe("real config sanity", () => {
+  const result = loadConfig(rawConfig);
+
+  it("loads the shipped config without errors", () => {
+    expect(result.ok).toBe(true);
+  });
+
+  it("produces sensible Green-plan numbers at the halfway point", () => {
+    if (!result.ok) throw new Error("config failed to load");
+    const config = result.config;
+
+    // Roughly mid-semester target.
+    const r = estimate(config, {
+      selectedPlanId: "green",
+      targetDate: parseISODate("2026-10-18")!,
+      activeMissingPeriodIds: new Set(),
+      extraExcludedDays: 0,
+    });
+
+    // Green = 210 blocks / 500 flex over ~112 days (Aug 24 -> Dec 13).
+    expect(r.totalActiveDays).toBe(112);
+    // per-week block rate ~ 210/112*7 = 13.125
+    expect(r.perWeekMealBlocks).toBeCloseTo(13.125, 2);
+    // consumed + remaining conserves the total
+    expect(r.consumedMealBlocks + r.remainingMealBlocks).toBeCloseTo(210);
+    expect(r.consumedFlexDollars + r.remainingFlexDollars).toBeCloseTo(500);
+    // partway through, consumption is strictly between 0 and total
+    expect(r.consumedMealBlocks).toBeGreaterThan(0);
+    expect(r.consumedMealBlocks).toBeLessThan(210);
+  });
+
+  it("checking a break reduces total active days", () => {
+    if (!result.ok) throw new Error("config failed to load");
+    const config = result.config;
+
+    const base = estimate(config, {
+      selectedPlanId: "green",
+      targetDate: parseISODate("2026-12-13")!,
+      activeMissingPeriodIds: new Set(),
+      extraExcludedDays: 0,
+    });
+    const withBreak = estimate(config, {
+      selectedPlanId: "green",
+      targetDate: parseISODate("2026-12-13")!,
+      activeMissingPeriodIds: new Set(["thanksgiving"]),
+      extraExcludedDays: 0,
+    });
+
+    expect(withBreak.totalActiveDays).toBeLessThan(base.totalActiveDays);
+    // Per-week rate rises because the same total spreads over fewer days.
+    expect(withBreak.perWeekMealBlocks).toBeGreaterThan(base.perWeekMealBlocks);
+  });
+});