在玩笑中使用共享测试用例时如何处理beforeEach块？

Question

我有一个写在类中的通用测试用例，可以在整个项目的许多场景中使用。我从测试文件（sample.test.js）调用测试用例，它执行得很好。如果我尝试在套件内使用beforeEach块。它表现为异步，并在beforeEach和测试用例并行执行，最终导致所有测试用例失败。如何克服这个？

test_helper.js

class TestHelper {

    /**
     * Method to execute content-type validation test case.
     * @param {String} uri - Uri to perform.
     * @param {String} method - Type of request based on this request has been given.
     */
    validateContentType(uri, method) {
        if (method == 'post') {
            it('REQUEST VALIDATION: should return 415 if request body content type is an text', async () => {
        // block of code
            }, 20000);
        }
        else {
            it('REQUEST VALIDATION: should return 415 if request body content type is an text', async () => {
               // block of code
            }, 20000);
        }
    }

    /**
     * Method to execute empty-body validation test case.
     * @param {String} uri - Uri to perform.
     * @param {String} method - Type of request based on this request has been given.
     */

    validateEmptyRequestBody(uri, method) {
        if (method == 'post') {
            it('REQUEST VALIDATION: should return 400 if request body is empty', async () => {
               // block of code
            }, 20000);
        }
        else {
            it('REQUEST VALIDATION: should return 400 if request body is empty', async () => {
        // block of code
            }, 20000);
        }
    }
}

sample.test.js

const { TestHelper } = require('../../../../helper/tests_helper'); 
const helper = new TestHelper();
const uri = 'someUrl';
let url;
let schema;
describe('PUT Request', () => {
        let updateId;
        // Preparing the Test Suite
        beforeAll(async () => {
            const schema = {
                key1: 'value1',
                key2: 'value2',
            };
           // create a record in database
            updateId = await helper.create(schema);
        });

        afterAll(async () => {
// clear the record from the db after all the test case executed
            await helper.clear(updateId);
        });

        url = `${uri}/update/${updateId}`;
// calling the test case which is available in test_helper.js
        helper.validateContentType(url, 'put');
        helper.validateEmptyRequestBody(url,'put');       
    })