Add name-casing rule.

Author: armano2

docs/rules/name-casing.md

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+# Name property casing for consistency purposes (name-casing)
+
+Define a style for the `name` property casing for consistency purposes
+
+## :book: Rule Details
+
+:+1: Examples of **correct** code for `PascalCase`:
+
+```js
+export default {
+  name: 'MyComponent'
+}
+```
+
+:+1: Examples of **correct** code for `kebab-case`:
+
+```js
+export default {
+  name: 'my-component'
+}
+```
+
+:+1: Examples of **correct** code for `camelCase`:
+
+```js
+export default {
+  name: 'myComponent'
+}
+```
+
+## :wrench: Options
+
+Default casing is set to `PascalCase`
+
+```
+'vue/name-casing': [2, 'camelCase'|'kebab-case'|'PascalCase']
+```

lib/rules/name-casing.js

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+/**
+ * @fileoverview Name property casing for consistency purposes
+ * @author Armano
+ */
+'use strict'
+
+const utils = require('../utils')
+
+function kebabCase (str) {
+  return str.replace(/([a-z])([A-Z])/g, match => match[0] + '-' + match[1]).replace(/\s+/g, '-').toLowerCase()
+}
+
+function camelCase (str) {
+  return str.replace(/(?:^\w|[A-Z]|\b\w)/g, (letter, index) => index === 0 ? letter.toLowerCase() : letter.toUpperCase()).replace(/[\s-]+/g, '')
+}
+
+function pascalCase (str) {
+  str = camelCase(str)
+  return str.length > 0 ? str.charAt(0).toUpperCase() + str.slice(1) : ''
+}
+
+function convertCase (str, caseType) {
+  if (caseType === 'kebab-case') {
+    return kebabCase(str)
+  } else if (caseType === 'PascalCase') {
+    return pascalCase(str)
+  }
+  return camelCase(str)
+}
+
+// ------------------------------------------------------------------------------
+// Rule Definition
+// ------------------------------------------------------------------------------
+
+function create (context) {
+  const options = context.options[0]
+  const caseType = ['camelCase', 'kebab-case', 'PascalCase'].indexOf(options) !== -1 ? options : 'PascalCase'
+
+  // ----------------------------------------------------------------------
+  // Public
+  // ----------------------------------------------------------------------
+
+  return utils.executeOnVueComponent(context, (obj) => {
+    const node = obj.properties
+      .filter(item => item.type === 'Property' && item.key.name === 'name' && item.value.type === 'Literal')[0]
+    if (node) {
+      const value = convertCase(node.value.value, caseType)
+      if (value !== node.value.value) {
+        context.report({
+          node: node.value,
+          message: 'Property name "{{value}}" is not {{caseType}}.',
+          data: {
+            value: node.value.value,
+            caseType: caseType
+          },
+          fix: fixer => fixer.replaceText(node.value, node.value.raw.replace(node.value.value, value))
+        })
+      }
+    }
+  })
+}
+
+module.exports = {
+  meta: {
+    docs: {
+      description: 'Name property casing for consistency purposes',
+      category: 'Stylistic Issues',
+      recommended: false
+    },
+    fixable: 'code',  // or "code" or "whitespace"
+    schema: [
+      {
+        enum: ['camelCase', 'kebab-case', 'PascalCase']
+      }
+    ]
+  },
+
+  create
+}

tests/lib/rules/name-casing.js

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+/**
+ * @fileoverview Define a style for the name property casing for consistency purposes
+ * @author Armano
+ */
+'use strict'
+
+// ------------------------------------------------------------------------------
+// Requirements
+// ------------------------------------------------------------------------------
+
+const rule = require('../../../lib/rules/name-casing')
+const RuleTester = require('eslint').RuleTester
+
+// ------------------------------------------------------------------------------
+// Tests
+// ------------------------------------------------------------------------------
+
+const ruleTester = new RuleTester()
+ruleTester.run('name-casing', rule, {
+
+  valid: [
+    {
+      filename: 'test.vue',
+      code: `
+        export default {
+        }
+      `,
+      options: ['camelCase'],
+      parserOptions: { ecmaVersion: 6, sourceType: 'module' }
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        export default {
+          name: 'fooBar'
+        }
+      `,
+      options: ['camelCase'],
+      parserOptions: { ecmaVersion: 6, sourceType: 'module' }
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        export default {
+          name: 'FooBar'
+        }
+      `,
+      options: ['PascalCase'],
+      parserOptions: { ecmaVersion: 6, sourceType: 'module' }
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        export default {
+          name: 'foo-bar'
+        }
+      `,
+      options: ['kebab-case'],
+      parserOptions: { ecmaVersion: 6, sourceType: 'module' }
+    }
+  ],
+
+  invalid: [
+    {
+      filename: 'test.vue',
+      code: `
+        export default {
+          name: 'foo-bar'
+        }
+      `,
+      options: ['camelCase'],
+      parserOptions: { ecmaVersion: 6, sourceType: 'module' },
+      errors: [{
+        message: 'Property name "foo-bar" is not camelCase.',
+        type: 'Literal',
+        line: 3
+      }]
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        export default {
+          name: 'foo  bar'
+        }
+      `,
+      options: ['PascalCase'],
+      parserOptions: { ecmaVersion: 6, sourceType: 'module' },
+      errors: [{
+        message: 'Property name "foo  bar" is not PascalCase.',
+        type: 'Literal',
+        line: 3
+      }]
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        export default {
+          name: 'foo!bar'
+        }
+      `,
+      options: ['camelCase'],
+      parserOptions: { ecmaVersion: 6, sourceType: 'module' },
+      errors: [{
+        message: 'Property name "foo!bar" is not camelCase.',
+        type: 'Literal',
+        line: 3
+      }]
+    },
+    {
+      filename: 'test.js',
+      code: `
+        new Vue({
+          name: 'foo!bar'
+        })
+      `,
+      options: ['camelCase'],
+      parserOptions: { ecmaVersion: 6 },
+      errors: [{
+        message: 'Property name "foo!bar" is not camelCase.',
+        type: 'Literal',
+        line: 3
+      }]
+    }
+  ]
+})