cause linking tests and improvements

spring-binding/src/test/java/org/springframework/binding/expression/ognl/OgnlExpressionParserTests.java

@@ -17,6 +17,7 @@ package org.springframework.binding.expression.ognl;
 
 import junit.framework.TestCase;
 
+import org.springframework.binding.expression.EvaluationException;
 import org.springframework.binding.expression.Expression;
 import org.springframework.binding.expression.ExpressionVariable;
 import org.springframework.binding.expression.ParserException;
@@ -215,4 +216,24 @@ public class OgnlExpressionParserTests extends TestCase {
 		}
 	}
 
+	public void testReasonCauseLinkingGetValue() {
+		String exp = "getException()";
+		Expression e = parser.parseExpression(exp, null);
+		try {
+			e.getValue(bean);
+		} catch (EvaluationException ex) {
+			assertTrue(ex.getCause().getCause() instanceof IllegalStateException);
+		}
+	}
+
+	public void testReasonCauseLinkingSetValue() {
+		String exp = "exceptionProperty";
+		Expression e = parser.parseExpression(exp, null);
+		try {
+			e.setValue(bean, "does not matter");
+		} catch (EvaluationException ex) {
+			assertTrue(ex.getCause().getCause() instanceof IllegalStateException);
+		}
+	}
+
 }

spring-binding/src/test/java/org/springframework/binding/expression/ognl/TestBean.java

@@ -61,4 +61,12 @@ public class TestBean {
 		this.date = date;
 	}
 
+	public Exception getException() {
+		throw new IllegalStateException("Test");
+	}
+
+	public void setExceptionProperty(String whatever) {
+		throw new IllegalStateException("Test");
+	}
+
 }