I was facing the same issue as Getting Jest global setup and global teardown to work in a typescript project, so I went with the solution provided in the answer and wrote 'require(ts-node/register)' at the top of my global setup file.
But, during transpilation, the following error occurs:
.
My global setup file looks like,
require('ts-node/register');
import { Connection } from "typeorm";
import { closeTestingConnection, createTestingConnection, dropTestingDatabases, runMigrationsOnDatabase } from "./utils/util";
/**
* Creates database connection before running any test case
*/
const globalSetup = async () => {
return new Promise(async (resolve, reject) => {
let testConnection: Connection | undefined;
try {
testConnection = await createTestingConnection();
await runMigrationsOnDatabase(testConnection);
resolve(true);
} catch (error) {
if(testConnection) {
await dropTestingDatabases(testConnection);
await closeTestingConnection(testConnection);
}
reject(error);
}
})
}
export default globalSetup;which uses a util function 'createTestingConnection',
export function getDBConfig(envName?: string): ConnectionOptions {
let file: string;
if (envName) {
file = __dirname + "/../../test/settings/ormconfig." + envName + ".ts";
} else {
file = __dirname + "/../../test/settings/ormconfig.local.ts";
}
try {
return require(file);
} catch (err) {
throw new Error("Unable to locate ++ DB Config.");
}
}
/**
* Creates a testing connections based on the configuration in the ormconfig.json
* and given options that can override some of its configuration for the test-specific use case.
*/
export async function createTestingConnection(): Promise<Connection> {
const testEnvName: string = process.env.TEST_ENV || "local";
return createConnection(getDBConfig(testEnvName));
}