fix(no-test-callback): don't provide fix for async functions (#469)

Fixes #466

Author: G-Rath

src/rules/__tests__/no-test-callback.test.ts

@@ -54,20 +54,38 @@ ruleTester.run('no-test-callback', rule, {
     },
     {
       code: 'test("something", async done => {done();})',
-      errors: [{ messageId: 'illegalTestCallback', line: 1, column: 25 }],
-      output:
-        'test("something", async () => {await new Promise(done => {done();})})',
+      errors: [{ messageId: 'useAwaitInsteadOfCallback', line: 1, column: 25 }],
     },
     {
       code: 'test("something", async done => done())',
-      errors: [{ messageId: 'illegalTestCallback', line: 1, column: 25 }],
-      output: 'test("something", async () => new Promise(done => done()))',
+      errors: [{ messageId: 'useAwaitInsteadOfCallback', line: 1, column: 25 }],
     },
     {
       code: 'test("something", async function (done) {done();})',
-      errors: [{ messageId: 'illegalTestCallback', line: 1, column: 35 }],
-      output:
-        'test("something", async function () {await new Promise((done) => {done();})})',
+      errors: [{ messageId: 'useAwaitInsteadOfCallback', line: 1, column: 35 }],
+    },
+    {
+      code: `
+      test('my test', async (done) => {
+        await myAsyncTask();
+        expect(true).toBe(false);
+        done();
+      });
+      `,
+      errors: [{ messageId: 'useAwaitInsteadOfCallback', line: 2, column: 30 }],
+    },
+    {
+      code: `
+      test('something', (done) => {
+        done();
+      });
+      `,
+      errors: [{ messageId: 'illegalTestCallback', line: 2, column: 26 }],
+      output: `
+      test('something', () => {return new Promise((done) => {
+        done();
+      })});
+      `,
     },
   ],
 });

src/rules/no-test-callback.ts

@@ -10,6 +10,8 @@ export default createRule({
     },
     messages: {
       illegalTestCallback: 'Illegal usage of test callback',
+      useAwaitInsteadOfCallback:
+        'Use await instead of callback in async functions',
     },
     fixable: 'code',
     schema: [],
@@ -31,6 +33,15 @@ export default createRule({
 
         const [argument] = callback.params;
 
+        if (callback.async) {
+          context.report({
+            node: argument,
+            messageId: 'useAwaitInsteadOfCallback',
+          });
+
+          return;
+        }
+
         context.report({
           node: argument,
           messageId: 'illegalTestCallback',
@@ -84,7 +95,7 @@ export default createRule({
             let replaceBefore = true;
 
             if (body.type === 'BlockStatement') {
-              const keyword = callback.async ? 'await' : 'return';
+              const keyword = 'return';
 
               beforeReplacement = `${keyword} ${beforeReplacement}{`;
               afterReplacement += '}';