AbstractExpressionParser now has a doParseSettableExpression() template method

spring-binding/src/test/java/org/springframework/binding/expression/support/SimpleExpressionTests.java

@@ -0,0 +1,94 @@
+/*
+ * Copyright 2004-2007 the original author or authors.
+ * 
+ * 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.springframework.binding.expression.support;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.springframework.binding.expression.EvaluationException;
+import org.springframework.binding.expression.ExpressionParser;
+import org.springframework.binding.expression.ParserException;
+
+import junit.framework.TestCase;
+import junit.framework.TestSuite;
+
+/**
+ * Tests simple expressions. Any expression language capable enough for
+ * real life usage should be able to pass these tests.
+ *  
+ * @author Erwin Vervaet
+ */
+public class SimpleExpressionTests extends TestCase {
+	
+	private ExpressionParser expressionParser;
+	private TestBean bean;
+	
+	public static TestSuite suite() {
+		TestSuite suite = new TestSuite();
+		suite.addTest(new SimpleExpressionTests("testGetValue", new OgnlExpressionParser()));
+		suite.addTest(new SimpleExpressionTests("testSetValue", new OgnlExpressionParser()));
+		suite.addTest(new SimpleExpressionTests("testSyntaxError", new OgnlExpressionParser()));
+		suite.addTest(new SimpleExpressionTests("testGetValue", new BeanWrapperExpressionParser()));
+		suite.addTest(new SimpleExpressionTests("testSetValue", new BeanWrapperExpressionParser()));
+		suite.addTest(new SimpleExpressionTests("testSyntaxError", new BeanWrapperExpressionParser()));
+		return suite;
+	}
+	
+	public SimpleExpressionTests(String name, ExpressionParser expressionParser) {
+		super(name);
+		this.expressionParser = expressionParser;
+	}
+	
+	protected void setUp() throws Exception {
+		bean = new TestBean();
+		bean.setFlag(true);
+		List list = new ArrayList();
+		list.add("foo");
+		list.add("bar");
+		bean.setList(list);
+	}
+	
+	public void testGetValue() {
+		assertEquals(Boolean.TRUE, expressionParser.parseExpression("${flag}").evaluate(bean, null));
+		assertEquals(Boolean.TRUE, expressionParser.parseExpression("flag").evaluate(bean, null));
+		assertSame(bean.getList(), expressionParser.parseExpression("${list}").evaluate(bean, null));
+		assertEquals("foo", expressionParser.parseExpression("${list[0]}").evaluate(bean, null));
+	}
+
+	public void testSetValue() {
+		expressionParser.parseSettableExpression("${flag}").evaluateToSet(bean, Boolean.FALSE, null);
+		assertFalse(bean.isFlag());
+		expressionParser.parseSettableExpression("flag").evaluateToSet(bean, Boolean.TRUE, null);
+		assertTrue(bean.isFlag());
+		List newList = new ArrayList();
+		newList.add("boo");
+		expressionParser.parseSettableExpression("${list}").evaluateToSet(bean, newList, null);
+		assertSame(newList, bean.getList());
+		expressionParser.parseSettableExpression("${list[0]}").evaluateToSet(bean, "baa", null);
+		assertEquals("baa", bean.getList().get(0));
+	}
+	
+	public void testSyntaxError() {
+		try {
+			expressionParser.parseExpression("foo(").evaluate(bean, null);
+			fail("should have failed");
+		}
+		catch (ParserException e) {
+		}
+		catch (EvaluationException e) {
+		}
+	}
+}