Add test for #374

Author: tonyganch

test/options/integral/issue-374.css

@@ -0,0 +1,4 @@
+html /deep/ span
+{
+    display: block;
+}

test/options/integral/test.js

@@ -13,6 +13,12 @@ describe('integral test', function() {
         this.shouldBeEqual('issue-252.sass', 'issue-252.expected.sass');
     });
 
+    it('Issue 374', function() {
+        var config = this.Comb.getConfig('csscomb');
+        this.comb.configure(config);
+        this.shouldBeEqual('issue-374.css');
+    });
+
     it('Should detect everything in integral test', function() {
         var input = this.readFile('integral.expected.css');
         // Clone the required config object, otherwise other tests would fail