[英]check if value is a string or a number in mocha/chai test
I'm curious about how to test a value
to be a string
or number
with chai
. 我很好奇如何使用chai
将value
测试为string
或 number
。 I know how to write a test for a string
or a number
, when it's a strict test. 我知道如何为string
或number
编写测试,当它是严格测试时。 But how to deal with it, when value
could either be one of them? 但是,当value
可能是其中之一时,如何处理呢?
A test for a string: 对字符串的测试:
describe("test", () => {
it("should be a string", () => {
let value = "1234";
value.should.be.a("string");
});
});
A test for a number: 对数字的测试:
describe("test", () => {
it("should be a number", () => {
let value = 1234;
value.should.be.a("number");
});
});
Is there a build-in way of chai
to do this? 是否有一个内置的方式chai
做到这一点?
I know that I could do some workarounds, like below. 我知道我可以做一些解决方法,如下所示。 But that feels kind of hacky . 但这感觉有点hacky 。
describe("test", () => {
it("should be a number or string", () => {
let value = 1234;
(typeof value).should.be.oneOf(["string", "number"]);
});
});
You could write your own method: 你可以编写自己的方法:
chai.Assertion.addMethod('stringOrNumber', function () {
//Check if it is a string or a number here
});
Then in your test: 然后在你的测试中:
expect(myValue).to.be.stringOrNumber();
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