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test(insights): cover detectGlp1Plateau direct branches with mocked prisma
Existing coverage only exercised the deterministic prompt formatter. The Prisma-driven branches around window arithmetic, meds[0] pick, and threshold comparison were untested — the previous regressions flagged by W10 (security sanitise + timezone) could have slipped. Ten new tests pin the seven return paths plus the multi-medication first-pick contract and the drug-name first-word display token.
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Marc-André Bombeck committed
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@@ -1,8 +1,176 @@
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import { describe, expect, it } from "vitest";
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import { describe, expect, it, vi, beforeEach } from "vitest";
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import { buildGlp1PlateauPrompt } from "@/lib/insights/glp1-plateau";
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vi.mock("@/lib/db", () => ({
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prisma: {
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medication: { findMany: vi.fn() },
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measurement: { findMany: vi.fn() },
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},
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}));
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import { prisma } from "@/lib/db";
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import {
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buildGlp1PlateauPrompt,
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detectGlp1Plateau,
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} from "@/lib/insights/glp1-plateau";
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const dayMs = 24 * 60 * 60 * 1000;
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beforeEach(() => {
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vi.resetAllMocks();
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});
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/**
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* Helper for an active-GLP-1 medication row with one current dose.
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* `effectiveFrom` is computed as `daysAgo` before `now`.
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*/
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function makeMed(
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daysAgo: number,
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now: Date,
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overrides: { name?: string; doseValue?: number; doseUnit?: string } = {},
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) {
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return {
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name: overrides.name ?? "Mounjaro",
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doseChanges: [
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{
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doseValue: overrides.doseValue ?? 7.5,
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doseUnit: overrides.doseUnit ?? "mg",
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effectiveFrom: new Date(now.getTime() - daysAgo * dayMs),
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},
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],
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};
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}
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describe("glp1-plateau", () => {
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describe("detectGlp1Plateau()", () => {
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it("returns null when no active GLP-1 medication exists", async () => {
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vi.mocked(prisma.medication.findMany).mockResolvedValue([] as never);
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const result = await detectGlp1Plateau("user-1");
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expect(result).toBeNull();
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expect(prisma.measurement.findMany).not.toHaveBeenCalled();
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});
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it("returns null when the current dose has been in place < 21 days", async () => {
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const now = new Date("2026-05-14T00:00:00Z");
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vi.mocked(prisma.medication.findMany).mockResolvedValue([
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makeMed(14, now),
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] as never);
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const result = await detectGlp1Plateau("user-1", now);
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expect(result).toBeNull();
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expect(prisma.measurement.findMany).not.toHaveBeenCalled();
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});
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it("returns null when fewer than two weight readings exist in window", async () => {
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const now = new Date("2026-05-14T00:00:00Z");
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vi.mocked(prisma.medication.findMany).mockResolvedValue([
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makeMed(30, now),
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] as never);
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vi.mocked(prisma.measurement.findMany).mockResolvedValue([
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{ value: 90, measuredAt: new Date(now.getTime() - 10 * dayMs) },
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] as never);
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const result = await detectGlp1Plateau("user-1", now);
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expect(result).toBeNull();
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});
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it("returns null when weight dropped by more than the threshold (still responding)", async () => {
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const now = new Date("2026-05-14T00:00:00Z");
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vi.mocked(prisma.medication.findMany).mockResolvedValue([
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makeMed(30, now),
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] as never);
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// first=92, last=88 → delta=-4 → loss exceeds 0.5 kg threshold.
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vi.mocked(prisma.measurement.findMany).mockResolvedValue([
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{ value: 92, measuredAt: new Date(now.getTime() - 20 * dayMs) },
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{ value: 88, measuredAt: new Date(now.getTime() - 1 * dayMs) },
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] as never);
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const result = await detectGlp1Plateau("user-1", now);
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expect(result).toBeNull();
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});
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it("returns a plateau context when weight loss stays within the threshold", async () => {
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const now = new Date("2026-05-14T00:00:00Z");
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vi.mocked(prisma.medication.findMany).mockResolvedValue([
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makeMed(30, now),
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] as never);
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// first=90.0, last=89.8 → delta=-0.2 kg, within ±0.5 kg.
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vi.mocked(prisma.measurement.findMany).mockResolvedValue([
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{ value: 90.0, measuredAt: new Date(now.getTime() - 20 * dayMs) },
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{ value: 89.9, measuredAt: new Date(now.getTime() - 10 * dayMs) },
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{ value: 89.8, measuredAt: new Date(now.getTime() - 1 * dayMs) },
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] as never);
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const result = await detectGlp1Plateau("user-1", now);
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expect(result).not.toBeNull();
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expect(result?.drug).toBe("Mounjaro");
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expect(result?.doseValue).toBe(7.5);
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expect(result?.doseUnit).toBe("mg");
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expect(result?.daysOnDose).toBe(30);
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expect(result?.readingsCount).toBe(3);
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// Rounded to 0.1 kg precision by the helper.
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expect(result?.weightDeltaKg).toBeCloseTo(-0.2, 5);
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});
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it("returns a plateau context when weight stays flat", async () => {
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const now = new Date("2026-05-14T00:00:00Z");
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vi.mocked(prisma.medication.findMany).mockResolvedValue([
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makeMed(28, now),
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] as never);
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vi.mocked(prisma.measurement.findMany).mockResolvedValue([
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{ value: 90.0, measuredAt: new Date(now.getTime() - 20 * dayMs) },
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{ value: 90.0, measuredAt: new Date(now.getTime() - 1 * dayMs) },
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] as never);
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const result = await detectGlp1Plateau("user-1", now);
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expect(result?.weightDeltaKg).toBe(0);
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expect(result?.daysOnDose).toBe(28);
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});
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it("returns a plateau context when weight has crept up", async () => {
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const now = new Date("2026-05-14T00:00:00Z");
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vi.mocked(prisma.medication.findMany).mockResolvedValue([
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makeMed(35, now),
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] as never);
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vi.mocked(prisma.measurement.findMany).mockResolvedValue([
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{ value: 89.5, measuredAt: new Date(now.getTime() - 18 * dayMs) },
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{ value: 90.2, measuredAt: new Date(now.getTime() - 2 * dayMs) },
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] as never);
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const result = await detectGlp1Plateau("user-1", now);
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expect(result?.weightDeltaKg).toBeCloseTo(0.7, 5);
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});
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it("picks the first GLP-1 medication when multiple exist", async () => {
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const now = new Date("2026-05-14T00:00:00Z");
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vi.mocked(prisma.medication.findMany).mockResolvedValue([
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makeMed(30, now, { name: "Mounjaro" }),
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makeMed(60, now, { name: "Ozempic" }),
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] as never);
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vi.mocked(prisma.measurement.findMany).mockResolvedValue([
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{ value: 90.0, measuredAt: new Date(now.getTime() - 20 * dayMs) },
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{ value: 89.8, measuredAt: new Date(now.getTime() - 1 * dayMs) },
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] as never);
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const result = await detectGlp1Plateau("user-1", now);
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expect(result?.drug).toBe("Mounjaro");
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});
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it("returns null when the medication carries no doseChanges", async () => {
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const now = new Date("2026-05-14T00:00:00Z");
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vi.mocked(prisma.medication.findMany).mockResolvedValue([
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{ name: "Mounjaro", doseChanges: [] },
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] as never);
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const result = await detectGlp1Plateau("user-1", now);
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expect(result).toBeNull();
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});
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it("emits the first word of the drug name as the display token", async () => {
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const now = new Date("2026-05-14T00:00:00Z");
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vi.mocked(prisma.medication.findMany).mockResolvedValue([
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makeMed(30, now, { name: "Mounjaro KwikPen" }),
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] as never);
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vi.mocked(prisma.measurement.findMany).mockResolvedValue([
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{ value: 90, measuredAt: new Date(now.getTime() - 18 * dayMs) },
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{ value: 90, measuredAt: new Date(now.getTime() - 1 * dayMs) },
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] as never);
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const result = await detectGlp1Plateau("user-1", now);
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expect(result?.drug).toBe("Mounjaro");
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});
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});
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describe("buildGlp1PlateauPrompt()", () => {
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it("renders the EN block with the named drug and dose", () => {
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const prompt = buildGlp1PlateauPrompt(
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