added api logic, vitest, minimal testing ui

api/tests/setup.ts

@@ -0,0 +1,32 @@
+import { execSync } from "node:child_process";
+import { beforeAll, afterAll } from "vitest";
+import { PrismaClient } from "@prisma/client";
+
+process.env.NODE_ENV = process.env.NODE_ENV || "test";
+process.env.DATABASE_URL =
+  process.env.DATABASE_URL ||
+  "postgres://app:app@localhost:5432/skymoney";
+process.env.PORT = process.env.PORT || "0";          // fastify can bind an ephemeral port
+process.env.HOST ??= "127.0.0.1";
+process.env.CORS_ORIGIN = process.env.CORS_ORIGIN || "";
+
+export const prisma = new PrismaClient();
+
+// hard reset for a single user
+export async function resetUser(userId: string) {
+  await prisma.allocation.deleteMany({ where: { userId } });
+  await prisma.transaction.deleteMany({ where: { userId } });
+  await prisma.incomeEvent.deleteMany({ where: { userId } });
+  await prisma.fixedPlan.deleteMany({ where: { userId } });
+  await prisma.variableCategory.deleteMany({ where: { userId } });
+  await prisma.user.deleteMany({ where: { id: userId } });
+}
+
+beforeAll(async () => {
+  // make sure the schema is applied before running tests
+  execSync("npx prisma migrate deploy", { stdio: "inherit" });
+});
+
+afterAll(async () => {
+  await prisma.$disconnect();
+});