58f297cc75
- 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
102 lines
3.4 KiB
Plaintext
102 lines
3.4 KiB
Plaintext
export const metadata = {
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title: `${pageNumber} Write Tests for Modules`,
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}
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# {metadata.title}
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In this chapter, you'll learn about the `moduleIntegrationTestRunner` utility function and how to use it to write integration tests for a module's main service.
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## moduleIntegrationTestRunner Utility
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The `moduleIntegrationTestRunner` utility function is provided by the `medusa-test-utils` package to create integration tests for a module. The integration tests run on a test Medusa application with only the specified module enabled.
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For example, assuming you have a `hello` module, create a test file at `src/modules/hello/__tests__/service.spec.ts`:
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```ts title="src/modules/hello/__tests__/service.spec.ts"
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import { moduleIntegrationTestRunner } from "medusa-test-utils"
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import { HELLO_MODULE } from ".."
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import HelloModuleService from "../service"
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import MyCustom from "../models/my-custom"
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moduleIntegrationTestRunner<HelloModuleService>({
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moduleName: HELLO_MODULE,
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moduleModels: [MyCustom],
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resolve: "./modules/hello",
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testSuite: ({ service }) => {
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// TODO write tests
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}
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})
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```
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The `moduleIntegrationTestRunner` function accepts as a parameter an object with the following properties:
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- `moduleName`: The name of the module.
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- `moduleModels`: An array of models in the module. Refer to [this section](#write-tests-for-modules-without-data-models) if your module doesn't have data models.
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- `resolve`: The path to the model relative to the `src` directory.
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- `testSuite`: A function that defines the tests to run.
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The `testSuite` function accepts as a parameter an object having the `service` property, which is an instance of the module's main service.
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<Note title="Tip">
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The type argument provided to the `moduleIntegrationTestRunner` function is used as the type of the `service` property.
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</Note>
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The tests in the `testSuite` function are written using [Jest](https://jestjs.io/).
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---
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## Pass Module Options
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If your module accepts options, you can set them using the `moduleOptions` property of the `moduleIntegrationTestRunner`'s parameter.
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For example:
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```ts
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import { moduleIntegrationTestRunner } from "medusa-test-utils"
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import HelloModuleService from "../service"
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moduleIntegrationTestRunner<HelloModuleService>({
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moduleOptions: {
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apiKey: "123"
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},
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// ...
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})
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```
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---
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## Write Tests for Modules without Data Models
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If your module doesn't have a data model, pass a dummy model in the `moduleModels` property.
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For example:
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```ts
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import { moduleIntegrationTestRunner } from "medusa-test-utils"
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import HelloModuleService from "../service"
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import { model } from "@medusajs/utils"
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const DummyModel = model.define("dummy_model", {})
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moduleIntegrationTestRunner<HelloModuleService>({
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moduleModels: [DummyModel],
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// ...
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})
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```
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---
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### Other Options and Inputs
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Refer to [this reference in the Learning Resources documentation](!resources!/test-tools-reference/moduleIntegrationTestRunner) for other available parameter options and inputs of the `testSuite` function.
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---
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## Database Used in Tests
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The `moduleIntegrationTestRunner` function creates a database with a random name before running the tests. Then, it drops that database after all the tests end.
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To manage that database, such as changing its name or perform operations on it in your tests, refer to the [references in the Learning Resources documentation](!resources!/test-tools-reference/moduleIntegrationTestRunner).
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