[New] jsx-pascal-case: allowAllCaps option now allows SCREAMING_SNAKE_CASE

Author: Tyler Swavely

docs/rules/jsx-pascal-case.md

@@ -46,7 +46,16 @@ The following patterns are **not** considered warnings:
 
 * `enabled`: for enabling the rule. 0=off, 1=warn, 2=error. Defaults to 0.
 * `allowAllCaps`: optional boolean set to `true` to allow components name in all caps (default to `false`).
-* `ignore`: optional array of components name to ignore during validation.
+* `ignore`: optional string-array of component names to ignore during validation.
+
+### `allowAllCaps`
+
+The following patterns are **not** considered warnings when `allowAllCaps` is `true`:
+
+```jsx
+<ALLOWED />
+<TEST_COMPONENT />
+```
 
 ## When Not To Use It
 

lib/rules/jsx-pascal-case.js

@@ -14,7 +14,7 @@ const jsxUtil = require('../util/jsx');
 // ------------------------------------------------------------------------------
 
 const PASCAL_CASE_REGEX = /^([A-Z0-9]|[A-Z0-9]+[a-z0-9]+(?:[A-Z0-9]+[a-z0-9]*)*)$/;
-const ALL_CAPS_TAG_REGEX = /^[A-Z0-9]+$/;
+const ALL_CAPS_TAG_REGEX = /^[A-Z0-9]+([A-Z0-9_]*[A-Z0-9]+)?$/;
 
 // ------------------------------------------------------------------------------
 // Rule Definition
@@ -65,10 +65,13 @@ module.exports = {
         const isIgnored = ignore.indexOf(name) !== -1;
 
         if (!isPascalCase && !isCompatTag && !isAllowedAllCaps && !isIgnored) {
-          context.report({
-            node,
-            message: `Imported JSX component ${name} must be in PascalCase`
-          });
+          let message = `Imported JSX component ${name} must be in PascalCase`;
+
+          if (allowAllCaps) {
+            message += ' or SCREAMING_SNAKE_CASE';
+          }
+
+          context.report({node, message});
         }
       }
     };

tests/lib/rules/jsx-pascal-case.js

@@ -49,6 +49,9 @@ ruleTester.run('jsx-pascal-case', rule, {
   }, {
     code: '<YMCA />',
     options: [{allowAllCaps: true}]
+  }, {
+    code: '<TEST_COMPONENT />',
+    options: [{allowAllCaps: true}]
   }, {
     code: '<Modal.Header />'
   }, {
@@ -67,5 +70,17 @@ ruleTester.run('jsx-pascal-case', rule, {
   }, {
     code: '<YMCA />',
     errors: [{message: 'Imported JSX component YMCA must be in PascalCase'}]
+  }, {
+    code: '<_TEST_COMPONENT />',
+    options: [{allowAllCaps: true}],
+    errors: [{message: 'Imported JSX component _TEST_COMPONENT must be in PascalCase or SCREAMING_SNAKE_CASE'}]
+  }, {
+    code: '<TEST_COMPONENT_ />',
+    options: [{allowAllCaps: true}],
+    errors: [{message: 'Imported JSX component TEST_COMPONENT_ must be in PascalCase or SCREAMING_SNAKE_CASE'}]
+  }, {
+    code: '<__ />',
+    options: [{allowAllCaps: true}],
+    errors: [{message: 'Imported JSX component __ must be in PascalCase or SCREAMING_SNAKE_CASE'}]
   }]
 });