diff --git a/platform/platform-tests/testSrc/com/intellij/ide/packageSets/PatternRegexpConvertorTest.java b/platform/platform-tests/testSrc/com/intellij/ide/packageSets/PatternRegexpConvertorTest.java
new file mode 100644
index 000000000000..1473ae9b39d6
--- /dev/null
+++ b/platform/platform-tests/testSrc/com/intellij/ide/packageSets/PatternRegexpConvertorTest.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2000-2006 JetBrains s.r.o. All Rights Reserved.
+ */
+
+/*
+ * Created by IntelliJ IDEA.
+ * User: Anna.Kozlova
+ * Date: 13-Sep-2006
+ * Time: 16:37:57
+ */
+package com.intellij.ide.packageSets;
+
+import com.intellij.psi.search.scope.packageSet.FilePatternPackageSet;
+import junit.framework.TestCase;
+
+public class PatternRegexpConvertorTest extends TestCase {
+   public void testConvertToRegexp() throws Exception {
+     assertEquals("a\\.[^\\.]*", FilePatternPackageSet.convertToRegexp("a.*", '.'));
+     assertEquals("a\\.(.*\\.)?[^\\.]*", FilePatternPackageSet.convertToRegexp("a..*", '.'));
+     assertEquals("a\\/[^\\/]*", FilePatternPackageSet.convertToRegexp("a/*", '/'));
+     assertEquals("a\\/(.*\\/)?[^\\/]*", FilePatternPackageSet.convertToRegexp("a//*", '/'));
+     assertEquals("[^\\.]*", FilePatternPackageSet.convertToRegexp("*", '.'));
+  }
+}
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