Access the name of the test being run in a Mocha test by using Typescript

While this question shares similarities with another one found at this link, the key difference here is that typescript is being used.

The issue at hand involves retrieving the current test title from within a mocha test, but due to the usage of typescript, the following code fails:

import 'mocha';

describe("top", () => {
    console.log(this.title);
    console.log(this.fullTitle());

    it("test", () => {
        console.log(this.test.title);
        console.log(this.test.fullTitle());
    });
});

With typescript involved, accessing this becomes obscured and direct access to native JavaScript's this is no longer viable.

Have you encountered this problem before? Is there any workaround available for it?

Answer №1

The issue does not lie in your usage of TypeScript, but rather in the utilization of arrow functions.

Arrow functions automatically assign this to the context where the function is declared.

Since all functions are arrow functions, your this refers to the global level, which is either global outside of strict mode or undefined in strict mode. (Considering you are using ES modules, by specification you are automatically in strict mode)

import 'mocha';

describe("top", function() {
    console.log(this.title);
    console.log(this.fullTitle());

    it("test", function() {
        console.log(this.test.title);
        console.log(this.test.fullTitle());
    });
});

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