Support specifying minimum Node version a test requires (#5765)

packages/babel-helper-fixtures/package.json

@@ -8,6 +8,7 @@
   "main": "lib/index.js",
   "dependencies": {
     "lodash": "^4.2.0",
-    "try-resolve": "^1.0.0"
+    "try-resolve": "^1.0.0",
+    "semver": "^5.3.0"
   }
 }

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

@@ -3,9 +3,12 @@ import trimEnd from "lodash/trimEnd";
 import resolve from "try-resolve";
 import clone from "lodash/clone";
 import merge from "lodash/merge";
+import semver from "semver";
 import path from "path";
 import fs from "fs";
 
+const nodeVersion = semver.clean(process.version.slice(1));
+
 function humanize(val, noext) {
   if (noext) val = path.basename(val, path.extname(val));
   return val.replace(/-/g, " ");
@@ -125,6 +128,22 @@ export default function get(entryLoc): Array<Suite> {
         },
       };
 
+      // If there's node requirement, check it before pushing task
+      if (taskOpts.minNodeVersion) {
+        const minimumVersion = semver.clean(taskOpts.minNodeVersion);
+
+        if (minimumVersion == null) {
+          throw new Error(`'minNodeVersion' has invalid semver format: ${taskOpts.minNodeVersion}`);
+        }
+
+        if (semver.lt(nodeVersion, minimumVersion)) {
+          return;
+        }
+
+        // Delete to avoid option validation error
+        delete taskOpts.minNodeVersion;
+      }
+
       // traceur checks
 
       if (test.exec.code.indexOf("// Async.") >= 0) {