Assertive.ts Sinon

An Assertive.ts plugin to match over Sinon.js spies, stubs, mocks, and fakes.

Requirements

• @assertive-ts/core: >=2.0.0
• sinon: >=15.2.0

Install

npm install --save-dev @assertive-ts/sinon

Or:

yarn add --dev @assertive-ts/sinon

API Reference

You can find the full API reference here 📚

Usage

You just need to load the plugin in a file that runs before the tests execution, like a setup.ts or something like that:

// setup.ts

import { usePlugin } from "@assertive-ts/core";
import { SinonPlugin } from "@assertive-ts/sinon";

usePlugin(SinonPlugin);

// ...rest of your setup

And that's it! The extra types will be automatically added as well so you won't need to change anything on TypeScript's side. Now you can use the expect(..) function to assert over Sinon spies, stubs, mocks, and fakes.

import { expect } from "@assertive-ts/core";
import Sinon from "sinon";

const spy = Sinon.spy(launchRockets);

expect(spy).toBeCalled(3); // exactly 3 times

expect(spy).toBeCalledTwice();

expect(spy).toBeCalledAtLeast(2);

expect(spy).toBeCalledAtMost(3);

expect(spy).toHaveArgs(10, "long-range");

expect(spy).toThrow();

The assertions above act over any of the calls made to the spy. You can get more specific matchers if you assert over a single spy call:

import { expect } from "@assertive-ts/core";
import Sinon from "sinon";

const spy = Sinon.spy(launchRockets);

expect(spy.firstCall).toHaveArgs(5, "short-range");

expect(spy.firstCall).toReturn({ status: "ok" });

expect(spy.firstCall) // more specific matchers over a single call
  .toThrowError(InvarianError)
  .toHaveMessage("Something went wrong...");

// or...

expect(spy)
  .call(1)
  .toThrowError(InvarianError)
  .toHaveMessage("Something went wrong...");

// or even better...

expect(spy)
  .toBeCalledOnce()
  .toThrowError(InvarianError)
  .toHaveMessage("Something went wrong...");

Notice how call(..) and .toBeCalledOnce() methods return an assertion over the single call, this way you can chain matchers instead of writing more statements.

License

MIT, see the LICENSE file.

Contributing

Do you want to contribute to this project? Please take a look at our contributing guideline to know how you can help us build it.

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