feat: create prefer-hooks-in-order rule (#1098)

* feat: create `prefer-hooks-in-order` rule

* wip

* Implement prefer-hooks-in-order logic

* Fix all rules tests

* ci: run prettier and docs generation, fix test description

* test: Add examples to the tests

* test: Add some more complicated tests

* ci: change isHook to isHookCall

* feat: use early returns consistently

Co-authored-by: Gareth Jones <[email protected]>

README.md

@@ -209,6 +209,7 @@ installations requiring long-term consistency.
 | [prefer-equality-matcher](docs/rules/prefer-equality-matcher.md)             | Suggest using the built-in equality matchers                        |                  | ![suggest][] |
 | [prefer-expect-assertions](docs/rules/prefer-expect-assertions.md)           | Suggest using `expect.assertions()` OR `expect.hasAssertions()`     |                  | ![suggest][] |
 | [prefer-expect-resolves](docs/rules/prefer-expect-resolves.md)               | Prefer `await expect(...).resolves` over `expect(await ...)` syntax |                  | ![fixable][] |
+| [prefer-hooks-in-order](docs/rules/prefer-hooks-in-order.md)                 | Prefer having hooks in a consistent order                           |                  |              |
 | [prefer-hooks-on-top](docs/rules/prefer-hooks-on-top.md)                     | Suggest having hooks before any test cases                          |                  |              |
 | [prefer-lowercase-title](docs/rules/prefer-lowercase-title.md)               | Enforce lowercase test names                                        |                  | ![fixable][] |
 | [prefer-snapshot-hint](docs/rules/prefer-snapshot-hint.md)                   | Prefer including a hint with external snapshots                     |                  |              |

docs/rules/prefer-hooks-in-order.md

@@ -0,0 +1,133 @@
+# Prefer having hooks in a consistent order (`prefer-hooks-in-order`)
+
+While hooks can be setup in any order, they're always called by `jest` in this
+specific order:
+
+1. `beforeAll`
+1. `beforeEach`
+1. `afterEach`
+1. `afterAll`
+
+This rule aims to make that more obvious by enforcing grouped hooks be setup in
+that order within tests.
+
+## Rule Details
+
+Examples of **incorrect** code for this rule
+
+```js
+/* eslint jest/prefer-hooks-in-order: "error" */
+
+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();
+  });
+});
+```
+
+Examples of **correct** code for this rule
+
+```js
+/* eslint jest/prefer-hooks-in-order: "error" */
+
+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();
+  });
+});
+```
+
+## Also See
+
+- [`prefer-hooks-on-top`](prefer-hooks-on-top.md)
+
+## Further Reading
+
+- [Order of execution of describe and test blocks](https://jestjs.io/docs/setup-teardown#order-of-execution-of-describe-and-test-blocks)

src/__tests__/__snapshots__/rules.test.ts.snap

@@ -39,6 +39,7 @@ Object {
       "jest/prefer-equality-matcher": "error",
       "jest/prefer-expect-assertions": "error",
       "jest/prefer-expect-resolves": "error",
+      "jest/prefer-hooks-in-order": "error",
       "jest/prefer-hooks-on-top": "error",
       "jest/prefer-lowercase-title": "error",
       "jest/prefer-snapshot-hint": "error",

src/__tests__/rules.test.ts

@@ -2,7 +2,7 @@ import { existsSync } from 'fs';
 import { resolve } from 'path';
 import plugin from '../';
 
-const numberOfRules = 47;
+const numberOfRules = 48;
 const ruleNames = Object.keys(plugin.rules);
 const deprecatedRules = Object.entries(plugin.rules)
   .filter(([, rule]) => rule.meta.deprecated)