--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.yangtools.yang.stmt;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.fail;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.List;
+import java.util.Set;
+import org.junit.Test;
+import org.opendaylight.yangtools.yang.model.api.ExtensionDefinition;
+import org.opendaylight.yangtools.yang.model.api.Module;
+import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+import org.opendaylight.yangtools.yang.model.api.UnknownSchemaNode;
+import org.opendaylight.yangtools.yang.parser.spi.meta.ReactorException;
+import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
+
+public class Bug4456Test {
+ @Test
+ public void test() throws IOException, URISyntaxException, SourceException, ReactorException {
+ SchemaContext schema = StmtTestUtils.parseYangSources("/bugs/bug4456");
+ assertNotNull(schema);
+
+ Set<Module> modules = schema.findModuleByNamespace(new URI("foo"));
+ assertEquals(1, modules.size());
+ Module moduleFoo = modules.iterator().next();
+
+ List<ExtensionDefinition> extensionSchemaNodes = moduleFoo.getExtensionSchemaNodes();
+ assertEquals(5, extensionSchemaNodes.size());
+ for (ExtensionDefinition extensionDefinition : extensionSchemaNodes) {
+
+ List<UnknownSchemaNode> unknownSchemaNodes = extensionDefinition.getUnknownSchemaNodes();
+ assertEquals(1, unknownSchemaNodes.size());
+ UnknownSchemaNode unknownSchemaNode = unknownSchemaNodes.iterator().next();
+ String unknownNodeExtensionDefName = unknownSchemaNode.getExtensionDefinition().getQName().getLocalName();
+
+ List<UnknownSchemaNode> subUnknownSchemaNodes = unknownSchemaNode.getUnknownSchemaNodes();
+ assertEquals(1, subUnknownSchemaNodes.size());
+ UnknownSchemaNode subUnknownSchemaNode = subUnknownSchemaNodes.iterator().next();
+ String subUnknownNodeExtensionDefName = subUnknownSchemaNode.getExtensionDefinition().getQName()
+ .getLocalName();
+
+ switch (extensionDefinition.getQName().getLocalName()) {
+ case "a":
+ assertEquals("b", unknownNodeExtensionDefName);
+ assertEquals("c", subUnknownNodeExtensionDefName);
+ break;
+ case "b":
+ assertEquals("c", unknownNodeExtensionDefName);
+ assertEquals("a", subUnknownNodeExtensionDefName);
+ break;
+ case "c":
+ assertEquals("a", unknownNodeExtensionDefName);
+ assertEquals("b", subUnknownNodeExtensionDefName);
+ break;
+ case "r":
+ assertEquals("r", unknownNodeExtensionDefName);
+ assertEquals("r2", subUnknownNodeExtensionDefName);
+ break;
+ case "r2":
+ assertEquals("r2", unknownNodeExtensionDefName);
+ assertEquals("r", subUnknownNodeExtensionDefName);
+ break;
+ default:
+ fail("Unexpected extension definition");
+ }
+ }
+ }
+}