Add utils for tests

tests/testContext.ts

@@ -0,0 +1,52 @@
+import v4Models, { type Database } from '@unocha/hpc-api-core/src/db';
+import { type ApolloServer } from 'apollo-server-hapi';
+import type Knex from 'knex';
+import { createDbConnection } from './utils/connection';
+import createApolloTestServer from './utils/server';
+
+interface IContext {
+  models: Database;
+  conn: Knex;
+  apolloTestServer: ApolloServer;
+}
+
+export default class ContextProvider implements IContext {
+  private static _instance: ContextProvider;
+
+  models: Database;
+  conn: Knex;
+  apolloTestServer: ApolloServer;
+
+  private constructor() {
+    this.models = {} as Database;
+    this.conn = {} as Knex;
+    this.apolloTestServer = {} as ApolloServer;
+  }
+
+  public static get Instance(): ContextProvider {
+    if (this._instance) {
+      return this._instance;
+    }
+    this._instance = new ContextProvider();
+    return this._instance;
+  }
+
+  public async setUpContext(): Promise<void> {
+    const connection = await this.createDbTestConnection();
+    this.conn = connection;
+    this.models = v4Models(this.conn);
+    this.apolloTestServer = await createApolloTestServer(
+      this.conn,
+      this.models
+    );
+  }
+
+  private async createDbTestConnection(): Promise<Knex<any, unknown[]>> {
+    return await createDbConnection({
+      host: 'localhost',
+      port: 6432,
+      user: 'postgres',
+      database: 'hpc-test',
+    });
+  }
+}

tests/utils/connection.ts

@@ -0,0 +1,33 @@
+import * as t from 'io-ts';
+import Knex from 'knex';
+
+const CONFIG = t.type({
+  host: t.string,
+  port: t.number,
+  user: t.string,
+  database: t.string,
+});
+
+/**
+ * Initialize a new Postgres provider
+ */
+export async function createDbConnection(connection: t.TypeOf<typeof CONFIG>) {
+  const knex = Knex({
+    client: 'pg',
+    connection,
+    pool: { min: 0, max: 10, idleTimeoutMillis: 500 },
+    debug: false,
+  });
+
+  // Verify the connection before proceeding
+  try {
+    await knex.raw('SELECT now()');
+
+    return knex;
+  } catch (error) {
+    console.log(error);
+    throw new Error(
+      'Unable to connect to Postgres via Knex. Ensure a valid connection.'
+    );
+  }
+}

tests/utils/server.ts

@@ -0,0 +1,62 @@
+import * as Hapi from '@hapi/hapi';
+import { type Database } from '@unocha/hpc-api-core/src/db';
+import { ApolloServerPluginLandingPageGraphQLPlayground } from 'apollo-server-core';
+import {
+  ApolloServer,
+  ApolloServerPluginStopHapiServer,
+} from 'apollo-server-hapi';
+import type Knex from 'knex';
+import PlatformPath from 'node:path';
+import 'reflect-metadata';
+import { buildSchema } from 'type-graphql';
+import { Container } from 'typedi';
+import { CONFIG } from '../../config';
+import { getTokenFromRequest } from '../../src/common-libs/auth';
+
+export default async function createApolloTestServer(
+  connection: Knex,
+  models: Database,
+  auth?: boolean
+) {
+  const schema = await buildSchema({
+    resolvers: [
+      PlatformPath.join(
+        __dirname,
+        '../../src/domain-services/**/resolver.{ts,js}'
+      ),
+    ],
+    container: Container, // Register the 3rd party IOC container
+  });
+
+  const hapiServer = Hapi.server({
+    port: CONFIG.httpPort,
+    app: {
+      config: CONFIG,
+      connection,
+    },
+  });
+
+  const apolloServerConfig = {
+    connection,
+    models,
+    config: CONFIG,
+  };
+
+  return new ApolloServer({
+    schema,
+    context: ({ request }: { request: Hapi.Request }) => ({
+      ...apolloServerConfig,
+      token: auth ? getTokenFromRequest(request) : undefined,
+    }),
+    plugins: [
+      ApolloServerPluginStopHapiServer({ hapiServer }),
+      /**
+       * Don't use sandbox explorer hosted on https://studio.apollographql.com
+       * but use local sandbox instead. Even though GraphQL playground is
+       * retired, it is much more useful for local development
+       * https://github.com/graphql/graphql-playground/issues/1143
+       */
+      ApolloServerPluginLandingPageGraphQLPlayground(),
+    ],
+  });
+}

tsconfig.json

@@ -22,7 +22,8 @@
     "src/**/*.js",
     "start.js",
     "bin",
-    "jest.config.ts"
+    "jest.config.ts",
+    "tests/**/*.ts"
   ],
   "exclude": ["node_modules"]
 }