# Testing - TypeError: Cannot destructure property 'events' of 'e' as it is null **URL:** \ **Category:** Uncategorized\ **Created:** [May 7, 2022, 8:55am UTC](https://forum.flow.com/t/testing-typeerror-cannot-destructure-property-events-of-e-as-it-is-null/3085 "2022-05-07T08:55:22Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Pzak](https://avatars.discourse-cdn.com/v4/letter/p/e9c0ed/32.png) [@Pzak](https://forum.flow.com/u/Pzak)\ **Post date:** [May 7, 2022, 8:55am UTC](https://forum.flow.com/t/testing-typeerror-cannot-destructure-property-events-of-e-as-it-is-null/3085/1 "2022-05-07T08:55:22Z")
Hello, I’m new to Flow and I’m trying to write a very simple test. But when I try to use `const Alice = await getAccountAddress('alice')` I’m getting the error: **"TypeError: Cannot destructure property ‘events’ of ‘e’ as it is null"** My test is very simple. So I’m probably missing something but I don’t know what Here is my test: ```auto import path from "path"; import { emulator, init, getAccountAddress } from "flow-js-testing"; // Increase timeout if your tests failing due to timeout jest.setTimeout(10000); describe("Token", () => { beforeEach(async () => { const basePath = path.resolve(__dirname, "../cadence"); // You can specify different port to parallelize execution of describe blocks const port = 8888; // Setting logging flag to true will pipe emulator output to console const logging = false; await init(basePath, { port }); return emulator.start(port, logging); }); // Stop emulator, so it could be restarted afterEach(async () => { return emulator.stop(); }) test("Alice should exist", async () => { const Alice = await getAccountAddress('alice') expect(Alice).toBeDefined() }) }); ``` The error: ```auto › Alice should exist TypeError: Cannot destructure property 'events' of 'e' as it is null. 23 | 24 | test("Alice should exist", async () => { > 25 | const Alice = await getAccountAddress('alice') | ^ 26 | expect(Alice).toBeDefined() 27 | }) 28 | }); at events (node_modules/flow-js-testing/src/account.js:64:19) at Object. (cadence/tests/ZooToken.test.ts:25:23) ``` ---
**Author:** ![bluesign](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.flow.com/bluesign/32/1359_2.png) [@bluesign](https://forum.flow.com/u/bluesign)\ **Post date:** [May 7, 2022, 4:19pm UTC](https://forum.flow.com/t/testing-typeerror-cannot-destructure-property-events-of-e-as-it-is-null/3085/2 "2022-05-07T16:19:57Z")
do you have flow.json in project root? > ---
**Author:** ![phill](https://avatars.discourse-cdn.com/v4/letter/p/779978/32.png) [@phill](https://forum.flow.com/u/phill)\ **Post date:** [May 9, 2022, 12:35pm UTC](https://forum.flow.com/t/testing-typeerror-cannot-destructure-property-events-of-e-as-it-is-null/3085/3 "2022-05-09T12:35:01Z")
I often see this error if I have another instance of the Flow emulator running - check that you don’t have another terminal open with the emulator running inside of it. If you do, shut that one down and run your test again ---
**Author:** ![Pzak](https://avatars.discourse-cdn.com/v4/letter/p/e9c0ed/32.png) [@Pzak](https://forum.flow.com/u/Pzak)\ **Post date:** [May 13, 2022, 10:59am UTC](https://forum.flow.com/t/testing-typeerror-cannot-destructure-property-events-of-e-as-it-is-null/3085/4 "2022-05-13T10:59:37Z")
I have generated my testing suite with `npx flow-js-testing init`. I have a flow.json file at my project’s root: ```auto "emulators": { "default": { "port": 3569, "serviceAccount": "emulator-account" } }, "contracts": { "ZooToken": "./cadence/contracts/ZooToken.sol", "FungibleToken": "./cadence/contracts/FungibleToken.sol" }, "networks": { "emulator": "127.0.0.1:3569", "mainnet": "access.mainnet.nodes.onflow.org:9000", "testnet": "access.devnet.nodes.onflow.org:9000" }, "accounts": { "emulator-account": { "address": "f8d6e0586b0a20c7", "key": "0cea21d8c33b62bd84d5684a2630406b79ed7330558058e1b933b9178382be4e" }, "alice": { "address": "179b6b1cb6755e31", "key": "bfa4823cec2f11864585124c9ea5d7e7832bd2bb6ce29e3db5f2ae6763a82086" } }, "deployments": { "emulator-account": ["FungibleToken", "ZooToken"] } } ``` And I don’t have a running emulator. I’m just running jest. My test fail only if I add this line: `const Alice = await getAccountAddress('alice')`. It looks like the function cannot create a new account ---
**Author:** ![bluesign](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.flow.com/bluesign/32/1359_2.png) [@bluesign](https://forum.flow.com/u/bluesign)\ **Post date:** [May 15, 2022, 8:20am UTC](https://forum.flow.com/t/testing-typeerror-cannot-destructure-property-events-of-e-as-it-is-null/3085/5 "2022-05-15T08:20:30Z")
Sorry only today had time to debug, just change port number in test from 8888, it is used by REST API on emulator now. 8080 etc should work. ---
**Author:** ![Pzak](https://avatars.discourse-cdn.com/v4/letter/p/e9c0ed/32.png) [@Pzak](https://forum.flow.com/u/Pzak)\ **Post date:** [May 19, 2022, 12:49pm UTC](https://forum.flow.com/t/testing-typeerror-cannot-destructure-property-events-of-e-as-it-is-null/3085/6 "2022-05-19T12:49:32Z")
I tried to switch to the port 8088, and verified that it’s not used and still have the same issue ---
**Author:** ![bluesign](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.flow.com/bluesign/32/1359_2.png) [@bluesign](https://forum.flow.com/u/bluesign)\ **Post date:** [May 20, 2022, 7:27am UTC](https://forum.flow.com/t/testing-typeerror-cannot-destructure-property-events-of-e-as-it-is-null/3085/7 "2022-05-20T07:27:46Z")
another option can be flow-cli version, this error is mostly related when Emulator is not running on that selected port etc. you can try to verify but watching `ps ax | grep flow` and catching launch arguments (quickest way) and trying to run with that arguments to see the error.