tools: add lowercase-name-for-primitive eslint rule

Primitives should use lowercase in error message.

Refs: https://github.com/nodejs/node/pull/16401
PR-URL: https://github.com/nodejs/node/pull/17568
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/tools/eslint-rules/lowercase-name-for-primitive.js b/tools/eslint-rules/lowercase-name-for-primitive.js
new file mode 100644
index 0000000000..bdf10328f3
--- /dev/null
+++ b/tools/eslint-rules/lowercase-name-for-primitive.js
@@ -0,0 +1,49 @@
+/**
+ * @fileoverview Check that TypeError[ERR_INVALID_ARG_TYPE] uses
+ *               lowercase for primitive types
+ * @author Weijia Wang <starkwang@126.com>
+ */
+'use strict';
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+const primitives = [
+  'number', 'string', 'boolean', 'null', 'undefined'
+];
+
+module.exports = function(context) {
+  return {
+    NewExpression(node) {
+      if (
+        node.callee.property &&
+        node.callee.property.name === 'TypeError' &&
+        node.arguments[0].value === 'ERR_INVALID_ARG_TYPE'
+      ) {
+        checkNamesArgument(node.arguments[2]);
+      }
+
+      function checkNamesArgument(names) {
+        switch (names.type) {
+          case 'Literal':
+            checkName(names.value);
+            break;
+          case 'ArrayExpression':
+            names.elements.forEach((name) => {
+              checkName(name.value);
+            });
+            break;
+        }
+      }
+
+      function checkName(name) {
+        const lowercaseName = name.toLowerCase();
+        if (primitives.includes(lowercaseName) && !primitives.includes(name)) {
+          const msg = `primitive should use lowercase: ${name}`;
+          context.report(node, msg);
+        }
+      }
+    }
+  };
+};