[compiler] snap fails if nothing compiled, unless @expectNothingCompiled (#35615)

A few times an agent has constructed fixtures that are silently skipped because the component has no jsx or hook calls. This PR updates snap to ensure that for each fixture either: 1) There are at least one compile success/failure *and* the `@expectNothingCompiled` pragma is missing 2) OR there are zero success/failures *and* the `@expectNothingCompiled` pragma is present This ensures we are intentional about fixtures that are expected not to have compilation, and know if that expectation breaks.
2026-02-22 03:42:05 +00:00 · 2026-01-23 10:38:40 -08:00
parent 03613cd68c
commit 2c8725fdfd
59 changed files with 116 additions and 81 deletions
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/class-component-with-render-helper.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/class-component-with-render-helper.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 class Component {
  _renderMessage = () => {
    const Message = () => {
@@ -22,7 +22,7 @@ class Component {
 ## Code

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 class Component {
  _renderMessage = () => {
    const Message = () => {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/class-component-with-render-helper.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/class-component-with-render-helper.js
@@ -1,4 +1,4 @@
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 class Component {
  _renderMessage = () => {
    const Message = () => {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/custom-opt-out-directive.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/custom-opt-out-directive.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @customOptOutDirectives:["use todo memo"]
+// @expectNothingCompiled @customOptOutDirectives:["use todo memo"]
 function Component() {
  'use todo memo';
  return <div>hello world!</div>;
@@ -18,7 +18,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code

 ```javascript
-// @customOptOutDirectives:["use todo memo"]
+// @expectNothingCompiled @customOptOutDirectives:["use todo memo"]
 function Component() {
  "use todo memo";
  return <div>hello world!</div>;
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/custom-opt-out-directive.tsx
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/custom-opt-out-directive.tsx
@@ -1,4 +1,4 @@
-// @customOptOutDirectives:["use todo memo"]
+// @expectNothingCompiled @customOptOutDirectives:["use todo memo"]
 function Component() {
  'use todo memo';
  return <div>hello world!</div>;
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/dont-memoize-primitive-function-call-non-escaping.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/dont-memoize-primitive-function-call-non-escaping.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @compilationMode:"infer" @enablePreserveExistingMemoizationGuarantees @validatePreserveExistingMemoizationGuarantees
+// @expectNothingCompiled @compilationMode:"infer" @enablePreserveExistingMemoizationGuarantees @validatePreserveExistingMemoizationGuarantees
 import {useMemo} from 'react';
 import {makeObject_Primitives, ValidateMemoization} from 'shared-runtime';

@@ -37,7 +37,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code

 ```javascript
-// @compilationMode:"infer" @enablePreserveExistingMemoizationGuarantees @validatePreserveExistingMemoizationGuarantees
+// @expectNothingCompiled @compilationMode:"infer" @enablePreserveExistingMemoizationGuarantees @validatePreserveExistingMemoizationGuarantees
 import { useMemo } from "react";
 import { makeObject_Primitives, ValidateMemoization } from "shared-runtime";

--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/dont-memoize-primitive-function-call-non-escaping.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/dont-memoize-primitive-function-call-non-escaping.js
@@ -1,4 +1,4 @@
-// @compilationMode:"infer" @enablePreserveExistingMemoizationGuarantees @validatePreserveExistingMemoizationGuarantees
+// @expectNothingCompiled @compilationMode:"infer" @enablePreserveExistingMemoizationGuarantees @validatePreserveExistingMemoizationGuarantees
 import {useMemo} from 'react';
 import {makeObject_Primitives, ValidateMemoization} from 'shared-runtime';

--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/gating/repro-no-gating-import-without-compiled-functions.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/gating/repro-no-gating-import-without-compiled-functions.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @gating
+// @expectNothingCompiled @gating
 import {isForgetEnabled_Fixtures} from 'ReactForgetFeatureFlag';

 export default 42;
@@ -12,7 +12,7 @@ export default 42;
 ## Code

 ```javascript
-// @gating
+// @expectNothingCompiled @gating
 import { isForgetEnabled_Fixtures } from "ReactForgetFeatureFlag";

 export default 42;
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/gating/repro-no-gating-import-without-compiled-functions.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/gating/repro-no-gating-import-without-compiled-functions.js
@@ -1,4 +1,4 @@
-// @gating
+// @expectNothingCompiled @gating
 import {isForgetEnabled_Fixtures} from 'ReactForgetFeatureFlag';

 export default 42;
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-dont-compile-components-with-multiple-params.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-dont-compile-components-with-multiple-params.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // Takes multiple parameters - not a component!
 function Component(foo, bar) {
  return <div />;
@@ -18,7 +18,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // Takes multiple parameters - not a component!
 function Component(foo, bar) {
  return <div />;
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-dont-compile-components-with-multiple-params.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-dont-compile-components-with-multiple-params.js
@@ -1,4 +1,4 @@
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // Takes multiple parameters - not a component!
 function Component(foo, bar) {
  return <div />;
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-no-component-annot.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-no-component-annot.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 import {useIdentity, identity} from 'shared-runtime';

 function Component(fakeProps: number) {
@@ -20,7 +20,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 import { useIdentity, identity } from "shared-runtime";

 function Component(fakeProps: number) {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-no-component-annot.ts
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-no-component-annot.ts
@@ -1,4 +1,4 @@
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 import {useIdentity, identity} from 'shared-runtime';

 function Component(fakeProps: number) {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-no-component-nested-jsx.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-no-component-nested-jsx.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 function Component(props) {
  const result = f(props);
  function helper() {
@@ -26,7 +26,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 function Component(props) {
  const result = f(props);
  function helper() {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-no-component-nested-jsx.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-no-component-nested-jsx.js
@@ -1,4 +1,4 @@
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 function Component(props) {
  const result = f(props);
  function helper() {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-no-component-obj-return.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-no-component-obj-return.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 function Component(props) {
  const ignore = <foo />;
  return {foo: f(props)};
@@ -22,7 +22,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 function Component(props) {
  const ignore = <foo />;
  return { foo: f(props) };
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-no-component-obj-return.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-no-component-obj-return.js
@@ -1,4 +1,4 @@
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 function Component(props) {
  const ignore = <foo />;
  return {foo: f(props)};
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-skip-components-without-hooks-or-jsx.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-skip-components-without-hooks-or-jsx.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // This component is skipped bc it doesn't call any hooks or
 // use JSX:
 function Component(props) {
@@ -14,7 +14,7 @@ function Component(props) {
 ## Code

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // This component is skipped bc it doesn't call any hooks or
 // use JSX:
 function Component(props) {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-skip-components-without-hooks-or-jsx.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/infer-skip-components-without-hooks-or-jsx.js
@@ -1,4 +1,4 @@
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // This component is skipped bc it doesn't call any hooks or
 // use JSX:
 function Component(props) {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-0592bd574811.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-0592bd574811.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // Regression test for some internal code.
 // This shows how the "callback rule" is more relaxed,
 // and doesn't kick in unless we're confident we're in
@@ -20,7 +20,7 @@ function makeListener(instance) {
 ## Code

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // Regression test for some internal code.
 // This shows how the "callback rule" is more relaxed,
 // and doesn't kick in unless we're confident we're in
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-0592bd574811.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-0592bd574811.js
@@ -1,4 +1,4 @@
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // Regression test for some internal code.
 // This shows how the "callback rule" is more relaxed,
 // and doesn't kick in unless we're confident we're in
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-2bec02ac982b.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-2bec02ac982b.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // Valid because hooks can call hooks.
 function createHook() {
  return function useHook() {
@@ -16,7 +16,7 @@ function createHook() {
 ## Code

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // Valid because hooks can call hooks.
 function createHook() {
  return function useHook() {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-2bec02ac982b.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-2bec02ac982b.js
@@ -1,4 +1,4 @@
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // Valid because hooks can call hooks.
 function createHook() {
  return function useHook() {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-33a6e23edac1.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-33a6e23edac1.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // Valid because hooks can use hooks.
 function createHook() {
  return function useHookWithHook() {
@@ -15,7 +15,7 @@ function createHook() {
 ## Code

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // Valid because hooks can use hooks.
 function createHook() {
  return function useHookWithHook() {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-33a6e23edac1.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-33a6e23edac1.js
@@ -1,4 +1,4 @@
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // Valid because hooks can use hooks.
 function createHook() {
  return function useHookWithHook() {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-8f1c2c3f71c9.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-8f1c2c3f71c9.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // Valid because components can use hooks.
 function createComponentWithHook() {
  return function ComponentWithHook() {
@@ -15,7 +15,7 @@ function createComponentWithHook() {
 ## Code

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // Valid because components can use hooks.
 function createComponentWithHook() {
  return function ComponentWithHook() {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-8f1c2c3f71c9.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-8f1c2c3f71c9.js
@@ -1,4 +1,4 @@
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // Valid because components can use hooks.
 function createComponentWithHook() {
  return function ComponentWithHook() {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-df4d750736f3.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-df4d750736f3.expect.md
@@ -2,6 +2,7 @@
 ## Input

 ```javascript
+// @expectNothingCompiled
 // Valid because they're not matching use[A-Z].
 fooState();
 _use();
@@ -15,6 +16,7 @@ jest.useFakeTimer();
 ## Code

 ```javascript
+// @expectNothingCompiled
 // Valid because they're not matching use[A-Z].
 fooState();
 _use();
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-df4d750736f3.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-df4d750736f3.js
@@ -1,3 +1,4 @@
+// @expectNothingCompiled
 // Valid because they're not matching use[A-Z].
 fooState();
 _use();
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-dfde14171fcd.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-dfde14171fcd.expect.md
@@ -2,6 +2,7 @@
 ## Input

 ```javascript
+// @expectNothingCompiled
 // Valid because classes can call functions.
 // We don't consider these to be hooks.
 class C {
@@ -16,6 +17,7 @@ class C {
 ## Code

 ```javascript
+// @expectNothingCompiled
 // Valid because classes can call functions.
 // We don't consider these to be hooks.
 class C {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-dfde14171fcd.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-dfde14171fcd.js
@@ -1,3 +1,4 @@
+// @expectNothingCompiled
 // Valid because classes can call functions.
 // We don't consider these to be hooks.
 class C {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-fe6042f7628b.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-fe6042f7628b.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // This is valid because "use"-prefixed functions called in
 // unnamed function arguments are not assumed to be hooks.
 unknownFunction(function (foo, bar) {
@@ -16,7 +16,7 @@ unknownFunction(function (foo, bar) {
 ## Code

 ```javascript
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // This is valid because "use"-prefixed functions called in
 // unnamed function arguments are not assumed to be hooks.
 unknownFunction(function (foo, bar) {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-fe6042f7628b.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/rules-of-hooks-fe6042f7628b.js
@@ -1,4 +1,4 @@
-// @compilationMode:"infer"
+// @expectNothingCompiled @compilationMode:"infer"
 // This is valid because "use"-prefixed functions called in
 // unnamed function arguments are not assumed to be hooks.
 unknownFunction(function (foo, bar) {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-191029ac48c8.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-191029ac48c8.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 // Invalid because it's dangerous.
@@ -22,7 +22,7 @@ useCustomHook();
 ## Code

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 // Invalid because it's dangerous.
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-191029ac48c8.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-191029ac48c8.js
@@ -1,4 +1,4 @@
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 // Invalid because it's dangerous.
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-206e2811c87c.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-206e2811c87c.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 // This is a false positive (it's valid) that unfortunately
@@ -20,7 +20,7 @@ class Foo extends Component {
 ## Code

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 // This is a false positive (it's valid) that unfortunately
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-206e2811c87c.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-206e2811c87c.js
@@ -1,4 +1,4 @@
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 // This is a false positive (it's valid) that unfortunately
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-28a7111f56a7.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-28a7111f56a7.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 // Technically this is a false positive.
@@ -23,7 +23,7 @@ const browserHistory = useBasename(createHistory)({
 ## Code

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 // Technically this is a false positive.
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-28a7111f56a7.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-28a7111f56a7.js
@@ -1,4 +1,4 @@
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 // Technically this is a false positive.
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-2c51251df67a.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-2c51251df67a.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 (class {
@@ -16,7 +16,7 @@
 ## Code

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 (class {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-2c51251df67a.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-2c51251df67a.js
@@ -1,4 +1,4 @@
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 (class {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-8303403b8e4c.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-8303403b8e4c.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 class ClassComponentWithHook extends React.Component {
@@ -16,7 +16,7 @@ class ClassComponentWithHook extends React.Component {
 ## Code

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 class ClassComponentWithHook extends React.Component {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-8303403b8e4c.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-8303403b8e4c.js
@@ -1,4 +1,4 @@
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 class ClassComponentWithHook extends React.Component {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-99b5c750d1d1.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-99b5c750d1d1.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 class ClassComponentWithFeatureFlag extends React.Component {
@@ -18,7 +18,7 @@ class ClassComponentWithFeatureFlag extends React.Component {
 ## Code

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 class ClassComponentWithFeatureFlag extends React.Component {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-99b5c750d1d1.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-99b5c750d1d1.js
@@ -1,4 +1,4 @@
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 class ClassComponentWithFeatureFlag extends React.Component {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-9c79feec4b9b.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-9c79feec4b9b.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 (class {
@@ -16,7 +16,7 @@
 ## Code

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 (class {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-9c79feec4b9b.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-9c79feec4b9b.js
@@ -1,4 +1,4 @@
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 (class {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-acb56658fe7e.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-acb56658fe7e.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 class C {
@@ -17,7 +17,7 @@ class C {
 ## Code

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 class C {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-acb56658fe7e.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-acb56658fe7e.js
@@ -1,4 +1,4 @@
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 class C {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-ddeca9708b63.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-ddeca9708b63.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 (class {
@@ -16,7 +16,7 @@
 ## Code

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 (class {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-ddeca9708b63.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-ddeca9708b63.js
@@ -1,4 +1,4 @@
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 (class {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-e69ffce323c3.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-e69ffce323c3.expect.md
@@ -2,7 +2,7 @@
 ## Input

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 (class {
@@ -16,7 +16,7 @@
 ## Code

 ```javascript
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 (class {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-e69ffce323c3.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/rules-of-hooks/todo.invalid.invalid-rules-of-hooks-e69ffce323c3.js
@@ -1,4 +1,4 @@
-// @skip
+// @expectNothingCompiled @skip
 // Passed but should have failed

 (class {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/skip-useMemoCache.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/skip-useMemoCache.expect.md
@@ -2,6 +2,7 @@
 ## Input

 ```javascript
+// @expectNothingCompiled
 import {c as useMemoCache} from 'react/compiler-runtime';

 function Component(props) {
@@ -26,6 +27,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code

 ```javascript
+// @expectNothingCompiled
 import { c as useMemoCache } from "react/compiler-runtime";

 function Component(props) {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/skip-useMemoCache.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/skip-useMemoCache.js
@@ -1,3 +1,4 @@
+// @expectNothingCompiled
 import {c as useMemoCache} from 'react/compiler-runtime';

 function Component(props) {
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/use-no-forget-with-no-errors.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/use-no-forget-with-no-errors.expect.md
@@ -2,6 +2,7 @@
 ## Input

 ```javascript
+// @expectNothingCompiled
 function Component() {
  'use no forget';
  return <div>Hello World</div>;
@@ -18,6 +19,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code

 ```javascript
+// @expectNothingCompiled
 function Component() {
  "use no forget";
  return <div>Hello World</div>;
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/use-no-forget-with-no-errors.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/use-no-forget-with-no-errors.js
@@ -1,3 +1,4 @@
+// @expectNothingCompiled
 function Component() {
  'use no forget';
  return <div>Hello World</div>;
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/use-no-memo-simple.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/use-no-memo-simple.expect.md
@@ -2,6 +2,7 @@
 ## Input

 ```javascript
+// @expectNothingCompiled
 function Component(props) {
  'use no memo';
  let x = [props.foo];
@@ -19,6 +20,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code

 ```javascript
+// @expectNothingCompiled
 function Component(props) {
  "use no memo";
  let x = [props.foo];
--- a/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/use-no-memo-simple.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/tests/fixtures/compiler/use-no-memo-simple.js
@@ -1,3 +1,4 @@
+// @expectNothingCompiled
 function Component(props) {
  'use no memo';
  let x = [props.foo];
--- a/compiler/packages/snap/src/compiler.ts
+++ b/compiler/packages/snap/src/compiler.ts
@@ -52,7 +52,11 @@ function makePluginOptions(
  EffectEnum: typeof Effect,
  ValueKindEnum: typeof ValueKind,
  ValueReasonEnum: typeof ValueReason,
-): [PluginOptions, Array<{filename: string | null; event: LoggerEvent}>] {
+): {
+  options: PluginOptions;
+  loggerTestOnly: boolean;
+  logs: Array<{filename: string | null; event: LoggerEvent}>;
+} {
  // TODO(@mofeiZ) rewrite snap fixtures to @validatePreserveExistingMemo:false
  let validatePreserveExistingMemoizationGuarantees = false;
  let target: CompilerReactTarget = '19';
@@ -69,13 +73,12 @@ function makePluginOptions(
    validatePreserveExistingMemoizationGuarantees = true;
  }

+  const loggerTestOnly = firstLine.includes('@loggerTestOnly');
  const logs: Array<{filename: string | null; event: LoggerEvent}> = [];
  const logger: Logger = {
-    logEvent: firstLine.includes('@loggerTestOnly')
-      ? (filename, event) => {
-          logs.push({filename, event});
-        }
-      : () => {},
+    logEvent: (filename, event) => {
+      logs.push({filename, event});
+    },
    debugLogIRs: debugIRLogger,
  };

@@ -96,7 +99,7 @@ function makePluginOptions(
    enableReanimatedCheck: false,
    target,
  };
-  return [options, logs];
+  return {options, loggerTestOnly, logs};
 }

 export function parseInput(
@@ -245,7 +248,7 @@ export async function transformFixtureInput(
  /**
   * Get Forget compiled code
   */
-  const [options, logs] = makePluginOptions(
+  const {options, loggerTestOnly, logs} = makePluginOptions(
    firstLine,
    parseConfigPragmaFn,
    debugIRLogger,
@@ -342,7 +345,7 @@ export async function transformFixtureInput(
  }
  const forgetOutput = await format(forgetCode, language);
  let formattedLogs = null;
-  if (logs.length !== 0) {
+  if (loggerTestOnly && logs.length !== 0) {
    formattedLogs = logs
      .map(({event}) => {
        return JSON.stringify(event, (key, value) => {
@@ -358,6 +361,23 @@ export async function transformFixtureInput(
      })
      .join('\n');
  }
+  const expectNothingCompiled =
+    firstLine.indexOf('@expectNothingCompiled') !== -1;
+  const successFailures = logs.filter(
+    log =>
+      log.event.kind === 'CompileSuccess' || log.event.kind === 'CompileError',
+  );
+  if (successFailures.length === 0 && !expectNothingCompiled) {
+    return {
+      kind: 'err',
+      msg: 'No success/failure events, add `// @expectNothingCompiled` to the first line if this is expected',
+    };
+  } else if (successFailures.length !== 0 && expectNothingCompiled) {
+    return {
+      kind: 'err',
+      msg: 'Expected nothing to be compiled (from `// @expectNothingCompiled`), but some functions compiled or errored',
+    };
+  }
  return {
    kind: 'ok',
    value: {