wehub-resource-sync
87 lines
2.3 KiB
Markdown
87 lines
2.3 KiB
Markdown
## Running Tests
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We use vitest exclusively for testing. To execute tests for a particular workspace, run the following command:
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```bash
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pnpm run test --filter webapp
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```
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Prefer running tests on a single file (and first cding into the directory):
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```bash
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cd apps/webapp
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pnpm run test ./src/components/Button.test.ts
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```
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If you are cd'ing into a directory, you may have to build dependencies first:
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```bash
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pnpm run build --filter webapp
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cd apps/webapp
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pnpm run test ./src/components/Button.test.ts
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```
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## Writing Tests
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We use vitest for testing. We almost NEVER mock anything. Start with a top-level "describe", and have multiple "it" statements inside of it.
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New test files should be placed right next to the file being tested. For example:
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- Source file: `./src/services/MyService.ts`
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- Test file: `./src/services/MyService.test.ts`
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When writing anything that needs redis or postgresql, we have some internal "testcontainers" that are used to spin up a local instance, redis, or both.
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redisTest:
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```typescript
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import { redisTest } from "@internal/testcontainers";
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import { createRedisClient } from "@internal/redis";
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describe("redisTest", () => {
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redisTest("should use redis", async ({ redisOptions }) => {
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const redis = createRedisClient(redisOptions);
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await redis.set("test", "test");
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const result = await redis.get("test");
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expect(result).toEqual("test");
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});
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});
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```
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postgresTest:
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```typescript
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import { postgresTest } from "@internal/testcontainers";
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describe("postgresTest", () => {
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postgresTest("should use postgres", async ({ prisma }) => {
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// prisma is an instance of PrismaClient
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});
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});
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```
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containerTest:
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```typescript
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import { containerTest } from "@internal/testcontainers";
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describe("containerTest", () => {
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containerTest("should use container", async ({ prisma, redisOptions }) => {
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// container has both prisma and redis
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});
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});
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```
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## Dos and Dont's
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- Do not mock anything.
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- Do not use mocks in tests.
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- Do not use spies in tests.
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- Do not use stubs in tests.
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- Do not use fakes in tests.
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- Do not use sinon in tests.
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- Structure each test with a setup, action, and assertion style.
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- Feel free to write long test names.
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- If there is any randomness in the code under test, use `seedrandom` to make it deterministic by allowing the caller to provide a seed.
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