如何添加Jasmine自定义匹配器Typescript定义? [英] How do I add a Jasmine custom matcher Typescript definition?
问题描述
我一直在寻找 周围这个问题似乎是重复的事情。但是,我找到的解决方案似乎都不适合我。
I've been looking around and this question seems like a recurring thing. However, none of the solutions I've found seem to work for me.
使用以下内容:
{
"typescript": "2.3.2",
"jasmine-core": "2.6.1",
"@types/jasmine": "2.5.47"
}
我无法使用Typescript合并命名空间包含我的自定义匹配器定义的声明。
I can't get Typescript to merge the namespace declaration containing my custom matcher definition.
添加:
declare namespace jasmine {
interface Matchers<T> {
toBeAnyOf(expected: jasmine.Expected<T>, expectationFailOutput?: any): boolean;
}
}
隐藏先前在<$ c $上声明的所有其他类型C>茉莉。编译器输出错误,例如:
Hides every other type previously declared on jasmine
. Compiler outputs errors such as:
[ts] Namespace 'jasmine' has no exported member 'CustomMatcherFactories'
[ts] Namespace 'jasmine' has no exported member 'CustomMatcher'.
有没有正确的方法来添加自定义匹配器并使其与Typescript很好地配合?
Is there any proper way to add a custom matcher and make it play nicely with Typescript?
如果你使用的是 tslint
还有一个问题: tslint:推荐
规则集。这些规则禁止使用命名空间
或模块
关键字,因此我必须禁用linter(或更改no-namespace
rule)以便尝试这一点。不确定如果不推荐,如何扩展定义。
There's an additional issue with tslint
if you are using tslint:recommended
ruleset. Those rules disallow the usage of namespace
or module
keywords, so I had to disable the linter (or change the "no-namespace"
rule) in order to try this out. Unsure how one would get around extending definitions if this is "not recommended".
推荐答案
添加时我必须修改三个文件自定义匹配器。我创建了一个名为matchers.ts的文件,其中包含实际的匹配器。然后我为matchers.ts文件添加了test.ts的导入。最后,我在typings.d.ts文件中添加了一个包含我的匹配器的接口。
I had to modify three files when I added custom matchers. I created a file called matchers.ts that contained the actual matchers. I then added an import to test.ts for my matchers.ts file. Finally, I added an interface to the typings.d.ts file which contains my matcher.
matchers.ts(任意名称)
matchers.ts (arbitrary name)
beforeEach(() => {
jasmine.addMatchers({
toContainText: () => {
return {
compare: (actual: HTMLElement, expectedText: string, customMessage?: string) => {
const actualText = actual.textContent;
return {
pass: actualText.indexOf(expectedText) > -1,
get message() {
let failureMessage = 'Expected ' + actualText + ' to contain ' + expectedText;
if (customMessage) {
failureMessage = ' ' + customMessage;
}
return failureMessage;
}
};
}
};
},
});
});
test.ts
import 'test/test-helpers/global/matchers'; (my relative filepath)
typings.d.ts
typings.d.ts
declare module jasmine {
interface Matchers {
toContainText(text: string, message?: string): boolean;
}
}
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