fix(require-top-level-describe): handle describe.each properly (#745)

Author: G-Rath

src/rules/__tests__/require-top-level-describe.test.ts

@@ -16,8 +16,8 @@ ruleTester.run('require-top-level-describe', rule, {
     'describe("test suite", () => { it("my test") });',
     dedent`
       describe("test suite", () => {
-        beforeEach("a", () => {}); 
-        describe("b", () => {}); 
+        beforeEach("a", () => {});
+        describe("b", () => {});
         test("c", () => {})
       });
     `,
@@ -33,6 +33,33 @@ ruleTester.run('require-top-level-describe', rule, {
       });
     `,
     'foo()',
+    'describe.each([1, true])("trues", value => { it("an it", () => expect(value).toBe(true) ); });',
+    dedent`
+      describe('%s', () => {
+        it('is fine', () => {
+          //
+        });
+      });
+
+      describe.each('world')('%s', () => {
+        it.each([1, 2, 3])('%n', () => {
+          //
+        });
+      });
+    `,
+    dedent`
+      describe.each('hello')('%s', () => {
+        it('is fine', () => {
+          //
+        });
+      });
+
+      describe.each('world')('%s', () => {
+        it.each([1, 2, 3])('%n', () => {
+          //
+        });
+      });
+    `,
   ],
   invalid: [
     {
@@ -62,5 +89,9 @@ ruleTester.run('require-top-level-describe', rule, {
       `,
       errors: [{ messageId: 'unexpectedHook' }],
     },
+    {
+      code: "it.each([1, 2, 3])('%n', () => {});",
+      errors: [{ messageId: 'unexpectedTestCase' }],
+    },
   ],
 });

src/rules/require-top-level-describe.ts

@@ -1,5 +1,11 @@
 import { TSESTree } from '@typescript-eslint/experimental-utils';
-import { createRule, isDescribe, isHook, isTestCase } from './utils';
+import {
+  createRule,
+  isDescribe,
+  isDescribeEach,
+  isHook,
+  isTestCase,
+} from './utils';
 
 export default createRule({
   name: __filename,
@@ -44,7 +50,7 @@ export default createRule({
         }
       },
       'CallExpression:exit'(node: TSESTree.CallExpression) {
-        if (isDescribe(node)) {
+        if (isDescribe(node) && !isDescribeEach(node)) {
           numberOfDescribeBlocks--;
         }
       },