fix(max-expect): reset expect counter when entering and exiting test function calls (#1206)

Author: G-Rath

src/rules/__tests__/max-expects.test.ts

@@ -120,6 +120,70 @@ ruleTester.run('max-expects', rule, {
         expect(true).toBeDefined();
       });
     `,
+    dedent`
+      function myHelper() {
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+      };
+
+      test('should pass', () => {
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+      });
+    `,
+    dedent`
+      function myHelper1() {
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+      };
+
+      test('should pass', () => {
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+      });
+
+      function myHelper2() {
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+      };
+    `,
+    dedent`
+      test('should pass', () => {
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+      });
+
+      function myHelper() {
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+      };
+    `,
+    dedent`
+      const myHelper1 = () => {
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+      };
+
+      test('should pass', function() {
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+      });
+
+      const myHelper2 = function() {
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+        expect(true).toBeDefined();
+      };
+    `,
     {
       code: dedent`
         test('should pass', () => {

src/rules/max-expects.ts

@@ -36,7 +36,7 @@ export default createRule({
   create(context, [{ max }]) {
     let count = 0;
 
-    const onFunctionExpressionEnter = (node: FunctionExpression) => {
+    const maybeResetCount = (node: FunctionExpression) => {
       const isTestFn =
         node.parent?.type !== AST_NODE_TYPES.CallExpression ||
         isTypeOfJestFnCall(node.parent, context, ['test']);
@@ -47,8 +47,10 @@ export default createRule({
     };
 
     return {
-      FunctionExpression: onFunctionExpressionEnter,
-      ArrowFunctionExpression: onFunctionExpressionEnter,
+      FunctionExpression: maybeResetCount,
+      'FunctionExpression:exit': maybeResetCount,
+      ArrowFunctionExpression: maybeResetCount,
+      'ArrowFunctionExpression:exit': maybeResetCount,
       CallExpression(node) {
         const jestFnCall = parseJestFnCall(node, context);