Add allowAllCaps and ignore options to jsx-pascal-case (fixes #575)

Author: yannickcr

docs/rules/jsx-pascal-case.md

@@ -36,6 +36,18 @@ The following patterns are not considered warnings:
 <CSSTransitionGroup />
 ```
 
+## Rule Options
+
+```js
+...
+"jsx-pascal-case": [<enabled>, { allowAllCaps: <allowAllCaps>, ignore: <ignore> }]
+...
+```
+
+* `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.
+
 ## When Not To Use It
 
 If you are not using JSX.

lib/rules/jsx-pascal-case.js

@@ -11,13 +11,18 @@
 
 var PASCAL_CASE_REGEX = /^([A-Z0-9]|[A-Z0-9]+[a-z0-9]+(?:[A-Z0-9]+[a-z0-9]*)*)$/;
 var COMPAT_TAG_REGEX = /^[a-z]|\-/;
+var ALL_CAPS_TAG_REGEX = /^[A-Z0-9]+$/;
 
 // ------------------------------------------------------------------------------
 // Rule Definition
 // ------------------------------------------------------------------------------
 
 module.exports = function(context) {
 
+  var configuration = context.options[0] || {};
+  var allowAllCaps = configuration.allowAllCaps || false;
+  var ignore = configuration.ignore || [];
+
   return {
     JSXOpeningElement: function(node) {
       switch (node.name.type) {
@@ -36,8 +41,10 @@ module.exports = function(context) {
 
       var isPascalCase = PASCAL_CASE_REGEX.test(node.name);
       var isCompatTag = COMPAT_TAG_REGEX.test(node.name);
+      var isAllowedAllCaps = allowAllCaps && ALL_CAPS_TAG_REGEX.test(node.name);
+      var isIgnored = ignore.indexOf(node.name) !== -1;
 
-      if (!isPascalCase && !isCompatTag) {
+      if (!isPascalCase && !isCompatTag && !isAllowedAllCaps && !isIgnored) {
         context.report({
           node: node,
           message: 'Imported JSX component ' + node.name + ' must be in PascalCase'
@@ -47,3 +54,16 @@ module.exports = function(context) {
   };
 
 };
+
+module.exports.schema = [{
+  type: 'object',
+  properties: {
+    allowAllCaps: {
+      type: 'boolean'
+    },
+    ignore: {
+      type: 'array'
+    }
+  },
+  additionalProperties: false
+}];

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

@@ -51,10 +51,17 @@ ruleTester.run('jsx-pascal-case', rule, {
   }, {
     code: '<T3stComp0nent />',
     parserOptions: parserOptions
-  },
-  {
+  }, {
     code: '<T />',
     parserOptions: parserOptions
+  }, {
+    code: '<YMCA />',
+    parserOptions: parserOptions,
+    options: [{allowAllCaps: true}]
+  }, {
+    code: '<IGNORED />',
+    parserOptions: parserOptions,
+    options: [{ignore: ['IGNORED']}]
   }],
 
   invalid: [{
@@ -65,5 +72,9 @@ ruleTester.run('jsx-pascal-case', rule, {
     code: '<TEST_COMPONENT />',
     parserOptions: parserOptions,
     errors: [{message: 'Imported JSX component TEST_COMPONENT must be in PascalCase'}]
+  }, {
+    code: '<YMCA />',
+    parserOptions: parserOptions,
+    errors: [{message: 'Imported JSX component YMCA must be in PascalCase'}]
   }]
 });