From fa2641473516a6cfb4969d364abac3615af783e4 Mon Sep 17 00:00:00 2001
From: Yosuke Ota <otameshiyo23@gmail.com>
Date: Tue, 29 Jan 2019 11:29:44 +0900
Subject: [PATCH] =?UTF-8?q?=E2=AD=90=EF=B8=8FNew:=20Add=20`vue/camelcase`?=
 =?UTF-8?q?=20rule=20(#772)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 docs/rules/README.md         |  1 +
 docs/rules/camelcase.md      | 21 +++++++++++++
 lib/index.js                 |  1 +
 lib/rules/camelcase.js       |  9 ++++++
 tests/lib/rules/camelcase.js | 57 ++++++++++++++++++++++++++++++++++++
 5 files changed, 89 insertions(+)
 create mode 100644 docs/rules/camelcase.md
 create mode 100644 lib/rules/camelcase.js
 create mode 100644 tests/lib/rules/camelcase.js

diff --git a/docs/rules/README.md b/docs/rules/README.md
index 4339b1e70..caa45f6ce 100644
--- a/docs/rules/README.md
+++ b/docs/rules/README.md
@@ -143,6 +143,7 @@ For example:
 | [vue/arrow-spacing](./arrow-spacing.md) | enforce consistent spacing before and after the arrow in arrow functions | :wrench: |
 | [vue/block-spacing](./block-spacing.md) | disallow or enforce spaces inside of blocks after opening block and before closing block | :wrench: |
 | [vue/brace-style](./brace-style.md) | enforce consistent brace style for blocks | :wrench: |
+| [vue/camelcase](./camelcase.md) | enforce camelcase naming convention |  |
 | [vue/component-name-in-template-casing](./component-name-in-template-casing.md) | enforce specific casing for the component naming style in template | :wrench: |
 | [vue/eqeqeq](./eqeqeq.md) | require the use of `===` and `!==` | :wrench: |
 | [vue/key-spacing](./key-spacing.md) | enforce consistent spacing between keys and values in object literal properties | :wrench: |
diff --git a/docs/rules/camelcase.md b/docs/rules/camelcase.md
new file mode 100644
index 000000000..c54c44457
--- /dev/null
+++ b/docs/rules/camelcase.md
@@ -0,0 +1,21 @@
+---
+pageClass: rule-details
+sidebarDepth: 0
+title: vue/camelcase
+description: enforce camelcase naming convention
+---
+# vue/camelcase
+> enforce camelcase naming convention
+
+This rule is the same rule as core [camelcase] rule but it applies to the expressions in `<template>`.
+
+## :books: Further reading
+
+- [camelcase]
+
+[camelcase]: https://eslint.org/docs/rules/camelcase
+
+## :mag: Implementation
+
+- [Rule source](https://github.com/vuejs/eslint-plugin-vue/blob/master/lib/rules/camelcase.js)
+- [Test source](https://github.com/vuejs/eslint-plugin-vue/blob/master/tests/lib/rules/camelcase.js)
diff --git a/lib/index.js b/lib/index.js
index 5f28d6b2a..3863dbe9d 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -13,6 +13,7 @@ module.exports = {
     'attributes-order': require('./rules/attributes-order'),
     'block-spacing': require('./rules/block-spacing'),
     'brace-style': require('./rules/brace-style'),
+    'camelcase': require('./rules/camelcase'),
     'comment-directive': require('./rules/comment-directive'),
     'component-name-in-template-casing': require('./rules/component-name-in-template-casing'),
     'eqeqeq': require('./rules/eqeqeq'),
diff --git a/lib/rules/camelcase.js b/lib/rules/camelcase.js
new file mode 100644
index 000000000..c0ca04175
--- /dev/null
+++ b/lib/rules/camelcase.js
@@ -0,0 +1,9 @@
+/**
+ * @author Yosuke Ota
+ */
+'use strict'
+
+const { wrapCoreRule } = require('../utils')
+
+// eslint-disable-next-line
+module.exports = wrapCoreRule(require('eslint/lib/rules/camelcase'))
diff --git a/tests/lib/rules/camelcase.js b/tests/lib/rules/camelcase.js
new file mode 100644
index 000000000..d12dda26c
--- /dev/null
+++ b/tests/lib/rules/camelcase.js
@@ -0,0 +1,57 @@
+/**
+ * @author Yosuke Ota
+ */
+'use strict'
+
+const RuleTester = require('eslint').RuleTester
+const rule = require('../../../lib/rules/camelcase')
+
+const tester = new RuleTester({
+  parser: 'vue-eslint-parser',
+  parserOptions: { ecmaVersion: 2015 }
+})
+
+tester.run('camelcase', rule, {
+  valid: [
+    `<template>
+      <div :attr="{ myPref: 1 }" />
+    </template>`,
+    {
+      code: `
+        <template>
+          <div @click="($event) => {
+            const { my_pref } = $event
+          }" />
+        </template>`,
+      options: [{ ignoreDestructuring: true }]
+    }
+  ],
+  invalid: [
+    {
+      code: `
+        <template>
+          <div :attr="{ my_pref: 1 }" />
+        </template>`,
+      errors: [
+        {
+          message: 'Identifier \'my_pref\' is not in camel case.',
+          line: 3
+        }
+      ]
+    },
+    {
+      code: `
+        <template>
+          <div @click="($event) => {
+            const { my_pref } = $event
+          }" />
+        </template>`,
+      errors: [
+        {
+          message: 'Identifier \'my_pref\' is not in camel case.',
+          line: 4
+        }
+      ]
+    }
+  ]
+})