update

backend/global.d.ts

@@ -0,0 +1,2 @@
+/* eslint-disable */
+import 'jest-extended';

backend/jest-global-setup.js

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+/* eslint no-process-env: "off" */
+/* eslint import/no-extraneous-dependencies: "off" */
+/* eslint @typescript-eslint/no-var-requires: "off" */
+
+// Why this file is .js and not .ts
+// https://github.com/kulshekhar/ts-jest/issues/411
+
+const dotenv = require('dotenv');
+const path = require('path');
+
+dotenv.config({ path: path.resolve(__dirname, '.env.test') });
+
+module.exports = async () => {
+    const db = process.env.PGDATABASE;
+
+    if (db && db !== 'test') {
+        // eslint-disable-next-line
+        console.error(`
+
+        > jest-global-setup.js
+        Running test on a non 'test' db will wipe out your entire db!
+        PGDATABASE is specified as '${db}' and not 'test'. Aborting...
+
+        `);
+        throw new Error();
+    }
+};

backend/jest.config.js

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+const { resolve } = require('path'); // eslint-disable-line @typescript-eslint/no-var-requires
+
+module.exports = {
+    transform: {
+        '^.+\\.ts$': 'ts-jest'
+    },
+    testMatch: ['**/tests/**/*.test.ts'],
+    moduleNameMapper: {
+        '^src/(.*)$': resolve(__dirname, './src/$1')
+    },
+    moduleFileExtensions: ['ts', 'js', 'json'],
+    moduleDirectories: ['node_modules'],
+    modulePathIgnorePatterns: ['directoryNameToIgnore'],
+    collectCoverage: false, // only collect coverage on full test suite run (see package.json script)
+    collectCoverageFrom: ['!src/**/index.ts', '!src/routes.ts', 'src/**/*.ts'],
+    coveragePathIgnorePatterns: ['/node_modules/', 'build/'],
+    coverageReporters: ['json', 'json-summary', 'lcov', 'text', 'text-summary', 'html'],
+    testEnvironment: 'node',
+    verbose: true,
+    setupFiles: ['./jest.setup.ts'],
+    setupFilesAfterEnv: ['jest-extended'],
+    globalSetup: './jest-global-setup.js'
+};

backend/jest.setup.ts

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+import 'reflect-metadata';
+
+jest.setTimeout(3000);