docs: added documentation on testing tools (#8939)
- Added documentation on how to use Medusa's tools from the `medusa-test-utils` package to create integration and unit tests. - Added a manual reference on the `medusaIntegrationTestRunner` and `moduleIntegrationTestRunner` functions. Since the typings in the source code aren't very informative, I opted for a manual reference shedding light on the important bits. Closes DOCS-852
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Shahed Nasser
GitHub
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export const metadata = {
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title: `${pageNumber} Example: Write Integration Tests for API Routes`,
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}
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# {metadata.title}
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In this chapter, you'll learn how to write integration tests for API routes using the [medusaIntegrationTestRunner utility function](../page.mdx).
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## Test a GET API Route
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Consider the following API route created at `src/api/store/custom/route.ts`:
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```ts title="src/api/store/custom/route.ts"
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import { MedusaRequest, MedusaResponse } from "@medusajs/medusa"
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export async function GET(
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req: MedusaRequest,
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res: MedusaResponse
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){
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res.json({
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message: "Hello, World!"
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})
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}
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```
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To write an integration test that tests this API route, create the file `integration-tests/http/custom-routes.spec.ts` with the following content:
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export const getHighlights = [
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["8", "api.get", "Send a GET request to the `/store/custom` API route."]
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]
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```ts title="integration-tests/http/custom-routes.spec.ts" highlights={getHighlights}
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import { medusaIntegrationTestRunner } from "medusa-test-utils"
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medusaIntegrationTestRunner({
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testSuite: ({ api, getContainer }) => {
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describe("Custom endpoints", () => {
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describe("GET /store/custom", () => {
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it("returns correct message", async () => {
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const response = await api.get(
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`/store/custom`
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)
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expect(response.status).toEqual(200)
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expect(response.data).toHaveProperty("message")
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expect(response.data.message).toEqual("Hello, World!")
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})
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})
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})
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}
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})
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```
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You use the `medusaIntegrationTestRunner` to write your tests.
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You add a single test that sends a `GET` request to `/store/custom` using the `api.get` method. For the test to pass, the response is expected to:
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- Have a code status `200`,
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- Have a `message` property in the returned data.
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- Have the value of the `message` property equal to `Hello, World!`.
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### Run Tests
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Run the following command to run your tests:
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```bash npm2yarn
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npm run test:integration
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```
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<Note title="Tip">
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If you don't have a `test:integration` script in `package.json`, refer to the [Medusa Testing Tools chapter](../../page.mdx#add-test-commands).
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</Note>
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This runs your Medusa application and runs the tests available under the `src/integrations` directory.
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---
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## Test a POST API Route
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Suppose you have a `hello` module whose main service extends the service factory, and that has the following model:
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```ts title="src/modules/hello/models/my-custom.ts"
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import { model } from "@medusajs/utils"
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const MyCustom = model.define("my_custom", {
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id: model.id().primaryKey(),
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name: model.text(),
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})
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export default MyCustom
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```
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And consider that the file `src/api/store/custom/route.ts` defines another route handler for `POST` requests:
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```ts title="src/api/store/custom/route.ts"
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// other imports...
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import HelloModuleService from "../../../modules/hello/service";
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// ...
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export async function POST(
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req: MedusaRequest,
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res: MedusaResponse
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) {
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const helloModuleService: HelloModuleService = req.scope.resolve(
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"helloModuleService"
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)
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const myCustom = await helloModuleService.createMyCustoms(
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req.body
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)
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res.json({
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my_custom: myCustom
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})
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}
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```
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This API route creates a new record of `MyCustom`.
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To write tests for this API route, add the following at the end of the `testSuite` function in `integration-tests/http/custom-routes.spec.ts`:
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export const postHighlights = [
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["14", "api.post", "Send a POST request to the `/store/custom` API route."]
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]
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```ts title="integration-tests/http/custom-routes.spec.ts" highlights={postHighlights}
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// other imports...
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import HelloModuleService from "../../src/modules/hello/service"
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medusaIntegrationTestRunner({
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testSuite: ({ api, getContainer }) => {
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describe("Custom endpoints", () => {
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// other tests...
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describe("POST /store/custom", () => {
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const id = "1"
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it("Creates my custom", async () => {
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const response = await api.post(
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`/store/custom`,
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{
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id,
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name: "Test"
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}
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)
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expect(response.status).toEqual(200)
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expect(response.data).toHaveProperty("my_custom")
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expect(response.data.my_custom).toEqual({
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id,
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name: "Test",
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created_at: expect.any(String),
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updated_at: expect.any(String),
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})
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})
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})
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})
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}
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})
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```
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This adds a test for the `POST /store/custom` API route. It uses `api.post` to send the POST request. The `api.post` method accepts as a second parameter the data to pass in the request body.
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The test passes if the response has:
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- Status code `200`.
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- A `my_custom` property in its data.
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- Its `id` and `name` match the ones provided to the request.
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### Tear Down Created Record
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To ensure consistency in the database for the rest of the tests after the above test is executed, utilize [Jest's setup and teardown hooks](https://jestjs.io/docs/setup-teardown) to delete the created record.
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Use the `getContainer` function passed as a parameter to the `testSuite` function to resolve a service and use it for setup or teardown purposes
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So, add an `afterAll` hook in the `describe` block for `POST /store/custom`:
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```ts title="integration-tests/http/custom-routes.spec.ts"
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// other imports...
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import HelloModuleService from "../../src/modules/hello/service"
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medusaIntegrationTestRunner({
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testSuite: ({ api, getContainer }) => {
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describe("Custom endpoints", () => {
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// other tests...
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describe("POST /store/custom", () => {
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// ...
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afterAll(() => async () => {
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const helloModuleService: HelloModuleService = getContainer().resolve(
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"helloModuleService"
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)
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await helloModuleService.deleteMyCustoms(id)
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})
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})
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})
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}
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})
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```
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The `afterAll` hook resolves the `HelloModuleService` and use its `deleteMyCustoms` to delete the record created by the test.
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---
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## Test a DELETE API Route
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Consider a `/store/custom/:id` API route created at `src/api/store/custom/[id]/route.ts`:
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```ts title="src/api/store/custom/[id]/route.ts"
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import { MedusaRequest, MedusaResponse } from "@medusajs/medusa";
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import HelloModuleService from "../../../modules/hello/service";
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export async function DELETE(
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req: MedusaRequest,
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res: MedusaResponse
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) {
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const helloModuleService: HelloModuleService = req.scope.resolve(
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"helloModuleService"
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)
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await helloModuleService.deleteMyCustoms(req.params.id)
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res.json({
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success: true
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})
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}
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```
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This API route accepts an ID path parameter, and uses the `HelloModuleService` to delete a `MyCustom` record by that ID.
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To add tests for this API route, add the following to `integration-tests/http/custom-routes.spec.ts`:
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export const deleteHighlights = [
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["21", "api.delete", "Send a DELETE request to the `/store/custom/:id` API route."]
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]
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```ts title="integration-tests/http/custom-routes.spec.ts" highlights={deleteHighlights}
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medusaIntegrationTestRunner({
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testSuite: ({ api, getContainer }) => {
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describe("Custom endpoints", () => {
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// ...
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describe("DELETE /store/custom/:id", () => {
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const id = "1"
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beforeAll(() => async () => {
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const helloModuleService: HelloModuleService = getContainer().resolve(
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"helloModuleService"
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)
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await helloModuleService.createMyCustoms({
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id,
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name: "Test"
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})
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})
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it("Deletes my custom", async () => {
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const response = await api.delete(
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`/store/custom/${id}`
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)
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expect(response.status).toEqual(200)
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expect(response.data).toHaveProperty("success")
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expect(response.data.success).toBeTruthy()
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})
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})
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})
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}
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})
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```
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This adds a new test for the `DELETE /store/custom/:id` API route. You use the `beforeAll` hook to create a `MyCustom` record using the `HelloModuleService`.
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In the test, you use the `api.delete` method to send a `DELETE` request to `/store/custom/:id`. The test passes if the response:
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- Has a `200` status code.
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- Has a `success` property in its data.
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- The `success` property's value is true.
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