javascript 如何在 Jasmine JS 中重用 beforeEach/afterEach？
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How to reuse beforeEach/afterEach in Jasmine JS?
提问by Adi Roiban
When writing tests with JasmineJS I have many tests that have similar beforeEach/afterEach code.
使用 JasmineJS 编写测试时，我有许多测试具有类似的 beforeEach/afterEach 代码。
Is there a way to implement an inheritance model using JasmineJS test suites?
有没有办法使用 JasmineJS 测试套件实现继承模型？
I can group all tests in a single describebut in this case I will end with a single HUGE JS file containing all tests.
我可以将所有测试组合成一个，describe但在这种情况下，我将以一个包含所有测试的巨大 JS 文件结束。
I would like to split the tests for each page.
我想为每个页面拆分测试。
Here is an example:
下面是一个例子：
describe('Services Page', function() {
beforeEach(function() {
login_as_admin()
})
beforeEach(function() {
browser().navigateTo('/services')
})
if('Some test for services page', function() {})
afterEach(function() {
logout()
})
})
describe('Administrators Page', function() {
beforeEach(function() {
login_as_admin()
})
beforeEach(function() {
browser().navigateTo('/administrators')
})
if('Some test for administrators page', function() {})
afterEach(function() {
logout()
})
})
采纳答案by Leo Gallucci
I think this is partially examined in this blog postand also answered herebut i'm adding an adapted answer for your example:
我认为这在这篇博文中得到了部分检查，也在这里得到了回答，但我正在为您的示例添加一个改编的答案：
Reusable code:
可重用代码：
function sharedSetup(startPage) {
beforeEach(function() {
login_as_admin();
browser().navigateTo(startPage);
});
afterEach(function() {
logout();
});
};
How to use it:
如何使用它：
describe('Services Page', function() {
sharedSetup('/services');
it('Some test for services page', function() {});
});
describe('Administrators Page', function() {
sharedSetup('/administrators');
it('Some test for administrators page', function() {});
});
回答by Steven
If you want to do this for all your suites, you can register a beforeEachor afterEachfunction in the topSuite:
如果您想为所有套件执行此操作，您可以在以下位置注册一个beforeEach或afterEach函数topSuite：
jasmine.getEnv().topSuite().beforeEach({fn: function() {
//log in as admin
}});
If you only want to apply it on some suites, you can work with sub-suites:
如果您只想将其应用于某些套件，则可以使用子套件：
describe("as_admin", function() {
beforeEach(function() {
//log in as admin
});
describe('Services Page',function() {...});
describe('Administrators Page',function() {...});
}
回答by Gregg
Jasmine does allow you to put beforeEachand afterEachoutside of a describecall. In this way you can have setup and teardown that is global for all of your specs. Your logout()call seems like it might be a good candidate for global teardown, and if all of your specs login as an admin, you could move that out to global scope as well.
Jasmine 确实允许您放置beforeEach和afterEach退出describe呼叫。通过这种方式，您可以对所有规格进行全局设置和拆卸。您的logout()电话似乎很适合全局拆卸，如果您的所有规范都以管理员身份登录，您也可以将其移至全局范围。
For things that are used in some, but not all, specs, having a method like your login_as_admin()seems like the best way to consolidate that logic in one place.
对于在某些（但不是全部）规范中使用的东西，拥有像您login_as_admin()这样的方法似乎是将这种逻辑整合到一个地方的最佳方式。
回答by xst
Reference: (Pivotal Labs Blog:Davis W. Frank)
参考：（Pivotal Labs 博客：Davis W. Frank）
He describes collecting shared functionality in a function that is called with parameters for the different individual suites. Calling this function within each suite will execute the common setup/configuration.
他描述了在一个函数中收集共享功能，该函数通过不同的单个套件的参数调用。在每个套件内调用此函数将执行通用设置/配置。
As to splitting tests across files; the file with the shared function can either be included within each page with a <script>tag if the tests are browser based, or by a require(...)near the top if the tests are node based. You can then run the tests independently but using that shared setup which is defined only once.
至于跨文件拆分测试；<script>如果测试是基于浏览器的，则具有共享功能的文件可以包含在每个页面中并带有标签，如果测试是基于require(...)节点的，则可以包含在靠近顶部的标签中。然后您可以独立运行测试，但使用仅定义一次的共享设置。
