[英]How to create fake object from a data type in Typescript for testing
I'm looking for a way to simplify making fake data for unit testing in Angular solution.我正在寻找一种方法来简化在 Angular 解决方案中为单元测试制作假数据。 I am using interfaces like:
我正在使用如下接口:
export interface ReferenceDataItemCommon {
codeDescription?: string;
code: string;
deleted?: boolean;
}
As data types in application.作为应用程序中的数据类型。 Currently using Factory.ts + Faker to create fake objects for purpose of tests:
目前使用 Factory.ts + Faker 为测试目的创建假对象:
export const fakeReferenceDataItemCommon = Factory.Sync.makeFactory<ReferenceDataItemCommon>({
code: Factory.each(() => Faker.lorem.word()),
codeDescription: Factory.each(() => Faker.lorem.sentence(4)),
});
But I'm curious if there is a way to simplify it even more for when you just want a object for your test and speed up creating it even more.但是我很好奇是否有一种方法可以进一步简化它,因为您只需要一个 object 来进行测试并更快地创建它。 Is it possible in Typescript to have a generic method that would return a object of that datatype?
Typescript 中是否有可能有一个通用方法返回该数据类型的 object?
const fake = createFake<ReferenceDataItemCommon>();
What my initial idea was is to do something like:我最初的想法是做类似的事情:
Object.keys(object).forEach(key => {
switch(typeof object[key]) {
case 'string':
object[key] = Faker.lorem.word();
break;
}
}
return object;
And for complex object call this method recursively.对于复杂的 object 递归调用此方法。 Is that possible, and if what would be a better approach to do this as I feel a bit out of my depth?
这有可能吗,如果我觉得有点超出我的深度,那么有什么更好的方法来做到这一点?
When you create the factories with a cli, not at runtime it's possible:当您使用 cli 创建工厂时,而不是在运行时,它是可能的:
https://www.npmjs.com/package/intermock looks promising https://www.npmjs.com/package/intermock看起来很有希望
I was searching for something similar too but also didn't find it.我也在寻找类似的东西,但也没有找到。 So, I create this lib https://www.npmjs.com/package/class-validator-mocker , which works with classes annotated with class-validator decorators.
因此,我创建了这个库https://www.npmjs.com/package/class-validator-mocker ,它适用于使用类验证器装饰器注释的类。 If you can work with data classes instead of interfaces to define certain types, I think it's worth taking a look at it.
如果您可以使用数据类而不是接口来定义某些类型,我认为值得一看。
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