jest/prefer-hooks-in-order Style
What it does
While hooks can be setup in any order, they're always called by jest
in this specific order:
beforeAll
beforeEach
afterEach
afterAll
This rule aims to make that more obvious by enforcing grouped hooks be setup in that order within tests.
Example
javascript
// invalid
describe("foo", () => {
beforeEach(() => {
seedMyDatabase();
});
beforeAll(() => {
createMyDatabase();
});
it("accepts this input", () => {
// ...
});
it("returns that value", () => {
// ...
});
describe("when the database has specific values", () => {
const specificValue = "...";
beforeEach(() => {
seedMyDatabase(specificValue);
});
it("accepts that input", () => {
// ...
});
it("throws an error", () => {
// ...
});
afterEach(() => {
clearLogger();
});
beforeEach(() => {
mockLogger();
});
it("logs a message", () => {
// ...
});
});
afterAll(() => {
removeMyDatabase();
});
});
javascript
// valid
describe("foo", () => {
beforeAll(() => {
createMyDatabase();
});
beforeEach(() => {
seedMyDatabase();
});
it("accepts this input", () => {
// ...
});
it("returns that value", () => {
// ...
});
describe("when the database has specific values", () => {
const specificValue = "...";
beforeEach(() => {
seedMyDatabase(specificValue);
});
it("accepts that input", () => {
// ...
});
it("throws an error", () => {
// ...
});
beforeEach(() => {
mockLogger();
});
afterEach(() => {
clearLogger();
});
it("logs a message", () => {
// ...
});
});
afterAll(() => {
removeMyDatabase();
});
});
This rule is compatible with eslint-plugin-vitest, to use it, add the following configuration to your .eslintrc.json
:
json
{
"rules": {
"vitest/prefer-hooks-in-order": "error"
}
}
## References
- [Rule Source](https://github.com/oxc-project/oxc/blob/36ebb3e7841818c238c44349d6cf859db4177d55/crates/oxc_linter/src/rules/jest/prefer_hooks_in_order.rs)