[ONOS-4650][ONOS-4726][ONOS-4727] [ONOS-4728]Implement must parser + when parser + feature + if-feature + revision defect fix

Change-Id: I0a3aee6c1c6b72ef7da7f7f565fd0f149fe3fd42
diff --git a/utils/yangutils/plugin/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ImportListenerTest.java b/utils/yangutils/plugin/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ImportListenerTest.java
index 9797e5e..b52da4a 100644
--- a/utils/yangutils/plugin/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ImportListenerTest.java
+++ b/utils/yangutils/plugin/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ImportListenerTest.java
@@ -16,14 +16,15 @@
 
 package org.onosproject.yangutils.parser.impl.listeners;
 
+import java.io.IOException;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
 import org.junit.Test;
 import org.onosproject.yangutils.datamodel.YangModule;
 import org.onosproject.yangutils.datamodel.YangNode;
 import org.onosproject.yangutils.parser.exceptions.ParserException;
 import org.onosproject.yangutils.parser.impl.YangUtilsParserManager;
 
-import java.io.IOException;
-
 import static org.hamcrest.core.Is.is;
 import static org.junit.Assert.assertThat;
 
@@ -33,6 +34,8 @@
 public class ImportListenerTest {
 
     private final YangUtilsParserManager manager = new YangUtilsParserManager();
+    private static final String DATE_FORMAT = "yyyy-MM-dd";
+    private final SimpleDateFormat simpleDateFormat = new SimpleDateFormat(DATE_FORMAT);
 
     /**
      * Checks if mandatory parameter prefix is present in import.
@@ -65,12 +68,12 @@
      * Checks if import listener updates the data model tree.
      */
     @Test
-    public void processImportValidEntry() throws IOException, ParserException {
+    public void processImportValidEntry() throws IOException, ParserException, ParseException {
 
         YangNode node = manager.getDataModel("src/test/resources/ImportValidEntry.yang");
 
         // Checks for the revision value in data model tree.
-        assertThat(((YangModule) node).getImportList().get(0).getRevision(), is("2015-02-03"));
+        assertThat(((YangModule) node).getImportList().get(0).getRevision(), is(simpleDateFormat.parse("2015-02-03")));
         // Checks for the prefix id in data model tree.
         assertThat(((YangModule) node).getImportList().get(0).getPrefixId(), is("On2"));
         // Checks for the module name in data model tree.