added regular expression check test

Author: adireddy

test/ERegInstantiationCheckTest.hx

@@ -0,0 +1,28 @@
+package ;
+
+import checkstyle.checks.ERegInstantiationCheck;
+
+class ERegInstantiationCheckTest extends CheckTestCase {
+
+	public function testCorrectEReg() {
+		var msg = checkMessage(ERegInstantiationTests.TEST1, new ERegInstantiationCheck());
+		assertEquals(msg, 'Bad EReg instantiation, define expression between ~/ and /');
+	}
+
+	public function testWrongEReg() {
+		var msg = checkMessage(ERegInstantiationTests.TEST2, new ERegInstantiationCheck());
+		assertEquals(msg, '');
+	}
+}
+
+class ERegInstantiationTests {
+	public static inline var TEST1:String = "
+	class Test {
+		var _reg:EReg = new EReg('test', 'i');
+	}";
+
+	public static inline var TEST2:String =
+	"class Test {
+		var _reg:EReg = ~/test/i;
+	}";
+}