feat: add code-only tests and enhance CLI sync command with seeding option

Introduced a new test suite for code-only applications, validating app creation, database sync behavior, and seeding functionality. Enhanced the CLI sync command to include a seeding option, allowing for explicit seeding during database synchronization. Added error handling for unresolved config files in the run command.

app/__test__/app/code-only.test.ts

@@ -0,0 +1,127 @@
+import { describe, expect, mock, test } from "bun:test";
+import { createApp as internalCreateApp, type CreateAppConfig } from "bknd";
+import { getDummyConnection } from "../../__test__/helper";
+import { ModuleManager } from "modules/ModuleManager";
+import { em, entity, text } from "data/prototype";
+
+async function createApp(config: CreateAppConfig = {}) {
+   const app = internalCreateApp({
+      connection: getDummyConnection().dummyConnection,
+      ...config,
+      options: {
+         ...config.options,
+         mode: "code",
+      },
+   });
+   await app.build();
+   return app;
+}
+
+describe("code-only", () => {
+   test("should create app with correct manager", async () => {
+      const app = await createApp();
+      await app.build();
+
+      expect(app.version()).toBeDefined();
+      expect(app.modules).toBeInstanceOf(ModuleManager);
+   });
+
+   test("should not perform database syncs", async () => {
+      const app = await createApp({
+         config: {
+            data: em({
+               test: entity("test", {
+                  name: text(),
+               }),
+            }).toJSON(),
+         },
+      });
+      expect(app.em.entities.map((e) => e.name)).toEqual(["test"]);
+      expect(
+         await app.em.connection.kysely
+            .selectFrom("sqlite_master")
+            .where("type", "=", "table")
+            .selectAll()
+            .execute(),
+      ).toEqual([]);
+
+      // only perform when explicitly forced
+      await app.em.schema().sync({ force: true });
+      expect(
+         await app.em.connection.kysely
+            .selectFrom("sqlite_master")
+            .where("type", "=", "table")
+            .selectAll()
+            .execute()
+            .then((r) => r.map((r) => r.name)),
+      ).toEqual(["test", "sqlite_sequence"]);
+   });
+
+   test("should not perform seeding", async () => {
+      const called = mock(() => null);
+      const app = await createApp({
+         config: {
+            data: em({
+               test: entity("test", {
+                  name: text(),
+               }),
+            }).toJSON(),
+         },
+         options: {
+            seed: async (ctx) => {
+               called();
+               await ctx.em.mutator("test").insertOne({ name: "test" });
+            },
+         },
+      });
+      await app.em.schema().sync({ force: true });
+      expect(called).not.toHaveBeenCalled();
+      expect(
+         await app.em
+            .repo("test")
+            .findMany({})
+            .then((r) => r.data),
+      ).toEqual([]);
+   });
+
+   test("should sync and perform seeding", async () => {
+      const called = mock(() => null);
+      const app = await createApp({
+         config: {
+            data: em({
+               test: entity("test", {
+                  name: text(),
+               }),
+            }).toJSON(),
+         },
+         options: {
+            seed: async (ctx) => {
+               called();
+               await ctx.em.mutator("test").insertOne({ name: "test" });
+            },
+         },
+      });
+
+      await app.em.schema().sync({ force: true });
+      await app.options?.seed?.({
+         ...app.modules.ctx(),
+         app: app,
+      });
+      expect(called).toHaveBeenCalled();
+      expect(
+         await app.em
+            .repo("test")
+            .findMany({})
+            .then((r) => r.data),
+      ).toEqual([{ id: 1, name: "test" }]);
+   });
+
+   test("should not allow to modify config", async () => {
+      const app = await createApp();
+      // biome-ignore lint/suspicious/noPrototypeBuiltins: <explanation>
+      expect(app.modules.hasOwnProperty("mutateConfigSafe")).toBe(false);
+      expect(() => {
+         app.modules.configs().auth.enabled = true;
+      }).toThrow();
+   });
+});