Java tutorial
/** * Copyright 2011 meltmedia * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.xchain.namespaces.core; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertFalse; import static org.junit.Assert.fail; import javax.xml.namespace.QName; import org.apache.commons.jxpath.JXPathContext; import org.junit.After; import org.junit.AfterClass; import org.junit.Before; import org.junit.BeforeClass; import org.junit.Test; import org.xchain.Catalog; import org.xchain.Command; import org.xchain.framework.factory.CatalogFactory; import org.xchain.framework.lifecycle.Lifecycle; /** * @author Devon Tackett * @author Christian Trimble */ public class TestVariableCommand { public static final String CATALOG_URI = "resource://context-class-loader/org/xchain/namespaces/core/variable-command.xchain"; public static final String XCHAIN_NAMESPACE_URI = "http://www.xchain.org/core/1.0"; public static final QName DECLARE_COMMAND = new QName(XCHAIN_NAMESPACE_URI, "delcare-test"); public static final QName MODIFY_COMMAND = new QName(XCHAIN_NAMESPACE_URI, "modify-test"); public static final QName REQUEST_DECLARE_COMMAND = new QName(XCHAIN_NAMESPACE_URI, "request-declare-test"); public static final QName REQUEST_MODIFY_COMMAND = new QName(XCHAIN_NAMESPACE_URI, "request-modify-test"); public static final QName EXECUTION_SCOPE_DECLARE_COMMAND = new QName(XCHAIN_NAMESPACE_URI, "execution-scope-declare-test"); public static final QName EXECUTION_SCOPE_SELECT_COMMAND = new QName(XCHAIN_NAMESPACE_URI, "execution-scope-select-test"); public static final QName EXECUTION_SCOPE_MODIFY_COMMAND = new QName(XCHAIN_NAMESPACE_URI, "execution-scope-modify-test"); public static final QName CHAIN_SCOPE_COMMAND = new QName(XCHAIN_NAMESPACE_URI, "chain-scope-test"); public static final QName CHAIN_MODIFY_COMMAND = new QName(XCHAIN_NAMESPACE_URI, "chain-modify-test"); public static final QName SELECT_COMPONENT_EXCEPTION_COMMAND = new QName(XCHAIN_NAMESPACE_URI, "select-component-exception-test"); public static final QName SELECT_FUNCTION_EXCEPTION_COMMAND = new QName(XCHAIN_NAMESPACE_URI, "select-function-exception-test"); public static final String RESULT = "result"; protected JXPathContext context = null; protected Catalog catalog = null; protected Command command = null; @BeforeClass public static void setUpLifecycle() throws Exception { Lifecycle.startLifecycle(); } @AfterClass public static void tearDownLifecycle() throws Exception { Lifecycle.stopLifecycle(); } @Before public void setUp() throws Exception { context = JXPathContext.newContext(new Object()); catalog = CatalogFactory.getInstance().getCatalog(CATALOG_URI); } @After public void tearDown() throws Exception { context = null; } @Test public void testDeclare() throws Exception { // Get the command. Command command = catalog.getCommand(DECLARE_COMMAND); // execute the command. command.execute(context); // Get the result. String resultString = (String) context.getValue("$" + RESULT, String.class); assertEquals("The declaration of a variable failed.", "string1", resultString); } @Test public void testModify() throws Exception { // Declare the variable at the 'request' level. JXPathContext requestContext = context; // Dig up to the 'request' context. while (requestContext.getParentContext() != null) requestContext = requestContext.getParentContext(); // Declare the variable. requestContext.getVariables().declareVariable(RESULT, "string1"); // Get the command. Command command = catalog.getCommand(MODIFY_COMMAND); // execute the command. command.execute(context); // Get the result. String resultString = (String) context.getValue("$" + RESULT, String.class); assertEquals("The modification of a declared variable failed.", "string2", resultString); } @Test public void testRequestDeclare() throws Exception { // Get the command. Command command = catalog.getCommand(REQUEST_DECLARE_COMMAND); // execute the command. command.execute(context); // Get the result. String resultString = (String) context.getValue("$" + RESULT, String.class); assertEquals("The declaration of a variable failed.", "string1", resultString); } @Test public void testRequestModify() throws Exception { // Declare the variable at the 'request' level. JXPathContext requestContext = context; // Dig up to the 'request' context. while (requestContext.getParentContext() != null) requestContext = requestContext.getParentContext(); // Declare the variable. requestContext.getVariables().declareVariable(RESULT, "string1"); // Get the command. Command command = catalog.getCommand(REQUEST_MODIFY_COMMAND); // execute the command. command.execute(context); // Get the result. String resultString = (String) context.getValue("$" + RESULT, String.class); assertEquals("The modification of a declared variable failed.", "string2", resultString); } /** * Test that a variable declared at the execution level does not exist outside of the execution. */ @Test public void testExecutionScopeDeclare() throws Exception { // Get the command. Command command = catalog.getCommand(EXECUTION_SCOPE_DECLARE_COMMAND); // execute the command. command.execute(context); // Assert that the variable does not exist. assertFalse("The scope of an execution level variable failed.", context.getVariables().isDeclaredVariable(RESULT)); } /** * Test that an execution scope variable can be selected. */ @Test public void testExecutionScopeSelect() throws Exception { // Get the command. Command command = catalog.getCommand(EXECUTION_SCOPE_SELECT_COMMAND); // execute the command. command.execute(context); // Get the result. String resultString = (String) context.getValue("$" + RESULT, String.class); assertEquals("The selecting of a execution scope variable failed.", "execution-scope", resultString); } /** * Test that an execution scope variable can be modified. */ @Test public void testExecutionScopeModify() throws Exception { // Get the command. Command command = catalog.getCommand(EXECUTION_SCOPE_MODIFY_COMMAND); // execute the command. command.execute(context); // Get the result. String resultString = (String) context.getValue("$" + RESULT, String.class); assertEquals("The modification of a execution scope variable failed.", "final-value", resultString); } @Test public void testChainScope() throws Exception { // Get the command. Command command = catalog.getCommand(CHAIN_SCOPE_COMMAND); // execute the command. command.execute(context); // Get the result. String resultString = (String) context.getValue("$" + RESULT, String.class); assertEquals("The scoping of a chain variable failed.", "string1", resultString); } @Test public void testChainModify() throws Exception { // Get the command. Command command = catalog.getCommand(CHAIN_MODIFY_COMMAND); // execute the command. command.execute(context); // Get the result. String resultString = (String) context.getValue("$" + RESULT, String.class); assertEquals("The storing or selection of a chain variable failed.", "string2", resultString); } /** * This case insures that a varialbe elements select attribute do not swollow component exceptions thrown in it. */ @Test public void testSelectComponentException() throws Exception { Command command = catalog.getCommand(SELECT_COMPONENT_EXCEPTION_COMMAND); try { command.execute(context); fail("The variable command's select attribute is swollowing component exceptions."); } catch (Exception e) { // success. } } /** * This case insures that a varialbe elements select attribute do not swollow function exceptions thrown in it. */ @Test public void testSelectFunctionException() throws Exception { Command command = catalog.getCommand(SELECT_FUNCTION_EXCEPTION_COMMAND); try { command.execute(context); fail("The variable command's select attribute is swollowing function exceptions."); } catch (Exception e) { // success. } } }