Run Babel transform tests on old node if possible

CONTRIBUTING.md

@@ -295,7 +295,7 @@ Other than normal Babel options, `options.json` can contain other properties to
 
 - **`minNodeVersion`** (string)
 
-  If the test requires a minimum Node version, you can add `minNodeVersion` (must be in semver format).
+  If an `exec.js`` test requires a minimum Node version, you can add `minNodeVersion` (must be in semver format).
 
   ```jsonc
   // options.json example
@@ -304,6 +304,8 @@ Other than normal Babel options, `options.json` can contain other properties to
   }
   ```
 
+  Use `minNodeVersionTransform` if an `input.js` test requires a minimum Node version.
+
 - **`externalHelpers`** (boolean)
 
   By default, all the tests run with the [`@babel/plugin-external-helpers`](https://babel.dev/docs/en/babel-plugin-external-helpers) enabled. You can disable this behavior with

packages/babel-helper-fixtures/data/schema.json

@@ -4,11 +4,14 @@
   "description": "JSON schema for Babel Fixture Test Runner",
   "allOf": [
     { "$ref": "#/definitions/TaskOption" },
-    { "$ref": "https://json.schemastore.org/babelrc", "$comment": "Todo: switch to our inhouse schema" }
+    {
+      "$ref": "https://json.schemastore.org/babelrc",
+      "$comment": "Todo: switch to our inhouse schema"
+    }
   ],
   "definitions": {
     "OS": {
-      "type":"string",
+      "type": "string",
       "description": "The possible values of `process.platform`. See https://nodejs.org/api/process.html#process_process_platform",
       "enum": ["aix", "darwin", "freebsd", "linux", "openbsd", "sunos", "win32"]
     },
@@ -17,14 +20,19 @@
       "properties": {
         "BABEL_8_BREAKING": {
           "description": "Whether this test should run when BABEL_8_BREAKING is enabled",
-          "type":"boolean"
+          "type": "boolean"
         },
         "ignoreOutput": {
           "description": "Whether the test should generate and compare with output.js",
           "type": "boolean"
         },
         "minNodeVersion": {
-          "description": "The minimum Node.js version this test should run on",
+          "description": "The minimum Node.js version the exec.js test should run on",
+          "type": "string",
+          "pattern": "^\\d+(\\.\\d+){0,2}$"
+        },
+        "minNodeVersionTransform": {
+          "description": "The minimum Node.js version the input.js transform test should run on",
           "type": "string",
           "pattern": "^\\d+(\\.\\d+){0,2}$"
         },
@@ -39,12 +47,12 @@
         },
         "throws": {
           "description": "Expected thrown error message",
-          "type":"string",
+          "type": "string",
           "default": ""
         },
         "validateLogs": {
           "description": "Whether this test should validate the stdout and stderr",
-          "type":"boolean",
+          "type": "boolean",
           "default": false
         }
       }

packages/babel-helper-fixtures/src/index.ts

@@ -53,6 +53,7 @@ export interface TaskOptions extends InputOptions {
   externalHelpers?: boolean;
   ignoreOutput?: boolean;
   minNodeVersion?: string;
+  minNodeVersionTransform?: string;
   sourceMap?: boolean;
   os?: string | string[];
   validateLogs?: boolean;
@@ -269,13 +270,34 @@ function pushTask(
     }
 
     if (semver.lt(nodeVersion, minimumVersion)) {
-      return;
+      if (test.actual.code) {
+        test.exec.code = null;
+      } else {
+        return;
+      }
     }
 
     // Delete to avoid option validation error
     delete taskOpts.minNodeVersion;
   }
 
+  if (taskOpts.minNodeVersionTransform) {
+    const minimumVersion = semver.clean(taskOpts.minNodeVersionTransform);
+
+    if (minimumVersion == null) {
+      throw new Error(
+        `'minNodeVersionTransform' has invalid semver format: ${taskOpts.minNodeVersionTransform}`,
+      );
+    }
+
+    if (semver.lt(nodeVersion, minimumVersion)) {
+      return;
+    }
+
+    // Delete to avoid option validation error
+    delete taskOpts.minNodeVersionTransform;
+  }
+
   if (taskOpts.os) {
     let os = taskOpts.os;
 

packages/babel-helpers/test/fixtures/dependencies/options.json

@@ -1,4 +1,4 @@
 {
-  "minNodeVersion": "12.22.0",
+  "minNodeVersionTransform": "12.22.0",
   "externalHelpers": false
 }

packages/babel-helpers/test/fixtures/misc/9496/options.json

@@ -1,4 +1,4 @@
 {
-  "minNodeVersion": "12.22.0",
+  "minNodeVersionTransform": "12.22.0",
   "plugins": ["./plugin"]
 }

packages/babel-helpers/test/fixtures/misc/arguments-identifier-in-function/options.json

@@ -1,4 +1,4 @@
 {
-  "plugins": ["./plugin"],
-  "minNodeVersion": "12.0.0"
+  "minNodeVersionTransform": "12.22.0",
+  "plugins": ["./plugin"]
 }

packages/babel-helpers/test/fixtures/misc/declaration-name-conflict-helper-entrypoint/options.json

@@ -1,4 +1,4 @@
 {
-  "minNodeVersion": "12.22.0",
+  "minNodeVersionTransform": "12.22.0",
   "plugins": ["./plugin"]
 }

packages/babel-plugin-bugfix-safari-id-destructuring-collision-in-function-expression/test/fixtures/integration/helper-function-name/options.json

@@ -1,5 +1,5 @@
 {
-  "minNodeVersion": "12.11.0",
+  "minNodeVersionTransform": "12.11.0",
   "plugins": [
     "./plugin.mjs",
     "bugfix-safari-id-destructuring-collision-in-function-expression"

packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/pipe-body-with-await/options.json

@@ -1,6 +1,6 @@
 {
-  "minNodeVersion": "8.0.0",
+  "minNodeVersionTransform": "8.0.0",
   "parserOpts": {
-     "allowReturnOutsideFunction": true
-   }
+    "allowReturnOutsideFunction": true
+  }
 }

packages/babel-plugin-proposal-pipeline-operator/test/fixtures/smart/transform-await-and-arrow-functions/options.json

@@ -6,5 +6,5 @@
   "parserOpts": {
     "allowReturnOutsideFunction": true
   },
-  "minNodeVersion": "8.0.0"
+  "minNodeVersionTransform": "8.0.0"
 }

packages/babel-plugin-transform-unicode-sets-regex/test/fixtures/basic/string-properties/options.json

@@ -1,3 +1,3 @@
 {
-  "minNodeVersion": "12.0.0"
+  "minNodeVersionTransform": "12.0.0"
 }

packages/babel-plugin-transform-unicode-sets-regex/test/fixtures/transform-u/string-properties/options.json

@@ -1,3 +1,3 @@
 {
-  "minNodeVersion": "12.0.0"
+  "minNodeVersionTransform": "12.0.0"
 }

packages/babel-preset-env/test/fixtures/preset-options-babel-7/unicode-sets-regex-chrome-111/options.json

@@ -1,5 +1,5 @@
 {
-  "minNodeVersion": "12.0.0",
+  "minNodeVersionTransform": "12.0.0",
   "presets": [
     [
       "env",

packages/babel-preset-flow/test/fixtures/flow-parser/hermes/options.json

@@ -1,5 +1,5 @@
 {
   "BABEL_8_BREAKING": false,
   "presets": [["flow", { "experimental_useHermesParser": true }]],
-  "minNodeVersion": "12.0.0"
+  "minNodeVersionTransform": "12.0.0"
 }