update docs

global-test-setup.ts

@@ -1,11 +1,14 @@
-export default async function mockAiCoreEnvVariable() {
+/**
+ * This file is used to mock the environment variables that are required for the tests.
+ */
+export default async function mockAiCoreEnvVariable(): Promise<void> {
     const aiCoreServiceCredentials =  {
         clientid: 'clientid',
         clientsecret: 'clientsecret',
         url: 'https://example.authentication.eu12.hana.ondemand.com',
         serviceurls: {
           AI_API_URL: 'https://api.ai.ml.hana.ondemand.com'
         }
-      }
+      };
     process.env['aicore'] = JSON.stringify(aiCoreServiceCredentials);
 }

global-test-teardown.ts

@@ -1,3 +1,6 @@
-export default async function tearDown() {
+/**
+ * This file is used to run code after all tests have been run.
+ */
+export default async function tearDown(): Promise<void> {
     delete process.env.aicore;
-}
+}

tsconfig.test.json

@@ -6,4 +6,4 @@
   },
   "include": ["packages/**/*.ts", "test-util/**/*.ts"],
   "exclude": ["dist/**/*", "node_modules/**/*"]
-}
+}