incr: add dummy inventory test

- add test boiler plate
- fix import error

tests/helpers.ts

@@ -2,7 +2,10 @@ import { DatabaseManager } from 'backend/database/manager';
 import { config } from 'dotenv';
 import { Fyo } from 'fyo';
 import { DummyAuthDemux } from 'fyo/tests/helpers';
+import path from 'path';
+import setupInstance from 'src/setup/setupInstance';
 import { SetupWizardOptions } from 'src/setup/types';
+import test from 'tape';
 import { getFiscalYear } from 'utils/misc';
 
 export function getTestSetupWizardOptions(): SetupWizardOptions {
@@ -25,6 +28,21 @@ export function getTestDbPath(dbPath?: string) {
   return dbPath ?? process.env.TEST_DB_PATH ?? ':memory:';
 }
 
+/**
+ * Test Boilerplate
+ * 
+ * The bottom three functions are test boilerplate for when
+ * an initialized fyo object is to be used.
+ * 
+ * They are required because top level await is not supported.
+ *
+ * Therefore setup and cleanup of the fyo object is wrapped 
+ * in tests which are executed serially (and awaited in order)
+ * by tape.
+ * 
+ * If `closeTestFyo` is not called the test process won't exit.
+ */
+
 export function getTestFyo(): Fyo {
   return new Fyo({
     DatabaseDemux: DatabaseManager,
@@ -33,3 +51,23 @@ export function getTestFyo(): Fyo {
     isElectron: false,
   });
 }
+
+const ext = '.spec.ts';
+
+export function setupTestFyo(fyo: Fyo, filename: string) {
+  const testName = path.basename(filename, ext);
+
+  return test(`setup: ${testName}`, async () => {
+    const options = getTestSetupWizardOptions();
+    const dbPath = getTestDbPath();
+    await setupInstance(dbPath, options, fyo);
+  });
+}
+
+export function closeTestFyo(fyo: Fyo, filename: string) {
+  const testName = path.basename(filename, ext);
+
+  return test(`cleanup: ${testName}`, async () => {
+    await fyo.close();
+  });
+}