Chore: Improve test coverage in a few places (#167)

Author: bmish

lib/rules/prefer-object-rule.js

@@ -52,6 +52,7 @@ module.exports = {
                 token => token.type === 'Punctuator' && token.value === '('
               );
 
+              /* istanbul ignore if */
               if (!openParenToken) {
                 // this shouldn't happen, but guarding against crashes just in case
                 return null;

package.json

@@ -33,10 +33,10 @@
     "eslint-utils": "^2.1.0"
   },
   "nyc": {
-    "branches": 97,
+    "branches": 98,
     "functions": 98,
     "lines": 99,
-    "statements": 98
+    "statements": 99
   },
   "devDependencies": {
     "@not-an-aardvark/node-release-script": "^0.1.0",

tests/lib/rules/require-meta-docs-description.js

@@ -14,6 +14,7 @@ const RuleTester = require('eslint').RuleTester;
 const ruleTester = new RuleTester({ parserOptions: { ecmaVersion: 6 } });
 ruleTester.run('require-meta-docs-description', rule, {
   valid: [
+    'foo()',
     `
       module.exports = {
         meta: { docs: { description: 'disallow unused variables' } },

tests/lib/rules/test-case-property-ordering.js

@@ -19,6 +19,14 @@ const RuleTester = require('eslint').RuleTester;
 const ruleTester = new RuleTester();
 ruleTester.run('test-case-property-ordering', rule, {
   valid: [
+    `
+      new RuleTester().run('foo', bar, {
+        valid: [
+          'foo',
+          RuleTester.only('foo'),
+        ]
+      });
+    `,
     `
       new RuleTester().run('foo', bar, {
         valid: [