must-return
This library adds is a promise assertion to Must.js. Internally it checks if object has a then property and if
it's chainable. With strict check (by default) it also checks for catch property.
Install
npm install must-promise
Usage
require("must-promise"); // This will internally require must and upgrade its prototype.
const q = require("q");
describe("Some tests", () => {
it("detects promises", () => {
q().must.be.a.promise();
Promise.resolve().must.be.a.promise();
});
it("detects not-promises", () => {
"5".must.not.be.a.promise();
true.must.not.be.a.promise();
});
it("will fail on unchainable promise-like thing", () => {
({ then: function() {} }).must.not.be.a.promise();
});
});License
MIT