GraphQL: Writing Tests for Canceling a Stripe Subscription

We’ve already written tests for creating a subscription in Stripe, now it’s time to write some basic tests for the other case: canceling the subscription in Stripe.

First, we can create a function that takes in a cookie string (for authentication), and makes a call to our GraphQL API using Axios.

	export const downgradeToBasic = async (cookie) => {
	return await axios.post(
	API_URL,
	{
	query: `
	mutation {
	downgradeToBasic {
	id
	username
	role
	}
	}
	`
	},
	{
	headers: { Cookie: cookie },
	withCredentials: true
	}
	);
	};

view raw api.js hosted with ❤ by GitHub

Now we can use this function to test a couple of cases:

1. It throws an error if the user is not logged in

	it("throws an error if user is not logged in.", async () => {
	const variables = { stripeToken: "tok_visa" };
	const cookie = null;
	const result = await userApi.downgradeToBasic(cookie);
	const expectedError = "Please log in first.";
	expect(result.data.errors[0].message).to.eql(expectedError);
	});

view raw user.spec.js hosted with ❤ by GitHub

2. It returns a user if user is logged in and downgrade was successful

	it("returns a user if user is logged in and downgrade was successful", async () => {
	const credentials = { login: "jacob", password: "password" };
	const response = await userApi.login(credentials);
	const cookie = response.headers["set-cookie"][0];
	const result = await userApi.downgradeToBasic(cookie);
	const expectedResult = {
	data: {
	downgradeToBasic: {
	id: "1",
	username: "jacob",
	role: "BASIC"
	}
	}
	};
	expect(result.data).to.eql(expectedResult);
	});

view raw user.spec.js hosted with ❤ by GitHub