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Commons Beanutils example source code file (MethodUtilsTestCase.java)
This example Commons Beanutils source code file (MethodUtilsTestCase.java) is included in the DevDaily.com
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The Commons Beanutils MethodUtilsTestCase.java source code
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.commons.beanutils;
import java.io.OutputStream;
import java.io.PrintStream;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import org.apache.commons.beanutils.priv.PrivateBeanFactory;
import org.apache.commons.beanutils.priv.PublicSubBean;
import junit.framework.TestCase;
import junit.framework.Test;
import junit.framework.TestSuite;
/**
* <p> Test case for MethodUtils
*
*/
public class MethodUtilsTestCase extends TestCase {
// ---------------------------------------------------------- Constructors
/**
* Construct a new instance of this test case.
*
* @param name Name of the test case
*/
public MethodUtilsTestCase(String name) {
super(name);
}
// -------------------------------------------------- Overall Test Methods
/**
* Set up instance variables required by this test case.
*/
public void setUp() {
}
/**
* Return the tests included in this test suite.
*/
public static Test suite() {
return (new TestSuite(MethodUtilsTestCase.class));
}
/**
* Tear down instance variables required by this test case.
*/
public void tearDown() {
}
// ------------------------------------------------ Individual Test Methods
/**
* <p> Test getAccessibleMethod.
*/
public void testGetAccessibleMethod() {
// test MethodUtils.getAccessibleMethod
// we'll make things easier by using the convenience methods
// easy bit first - find a public method
// METHOD ONE
Method method = MethodUtils.getAccessibleMethod
(TestBean.class, "setStringProperty", String.class);
// check that we've found one that matches
assertNotNull(method);
assertEquals("method ONE is named correctly",
"setStringProperty", method.getName());
assertTrue("Method ONE is public",
Modifier.isPublic(method.getModifiers()));
// trickier this one - find a method in a direct interface
// METHOD TWO
method = MethodUtils.getAccessibleMethod
(PrivateBeanFactory.create().getClass(),
"methodBar",
String.class);
// check that we've found one that matches
assertNotNull(method);
assertEquals("Method TWO is named correctly",
"methodBar", method.getName());
assertTrue("Method TWO is public",
Modifier.isPublic(method.getModifiers()));
// trickier this one - find a method in a indirect interface
// METHOD THREE
method = MethodUtils.getAccessibleMethod
(PrivateBeanFactory.createSubclass().getClass(),
"methodBaz",
String.class);
// check that we've found one that matches
assertNotNull(method);
assertEquals("Method THREE is named correctly",
"methodBaz", method.getName());
assertTrue("Method THREE is public",
Modifier.isPublic(method.getModifiers()));
}
/**
* <p> Test invokeExactMethod.
*/
public void testInvokeExactMethod() {
// test MethodUtils.invokeExactMethod
// easy bit first - invoke a public method
// METHOD ONE
try {
TestBean bean = new TestBean();
Object ret = MethodUtils.invokeExactMethod(bean, "setStringProperty", "TEST");
// check that the return's right and that the properties been set
assertNull(ret);
assertEquals("Method ONE was invoked", "TEST", bean.getStringProperty());
} catch (Throwable t) {
// ONE
fail("Exception in method ONE prevented invokation: " + t.toString());
}
// trickier this one - find a method in a direct interface
// METHOD TWO FAILURE
try {
Object ret = MethodUtils.invokeExactMethod(
PrivateBeanFactory.create(),
"methodBar",
"ANOTHER TEST");
// check that we've found one that matches
assertEquals("Method TWO was invoked correctly", "ANOTHER TEST", ret);
} catch (Throwable t) {
// METHOD TWO FAILURE
fail("Exception in method TWO prevented invokation: " + t.toString());
}
// trickier this one - find a method in a indirect interface
// METHOD THREE
try {
Object ret = MethodUtils.invokeExactMethod(
PrivateBeanFactory.createSubclass(),
"methodBaz",
"YET ANOTHER TEST");
// check that we've found one that matches
assertEquals("Method TWO was invoked correctly", "YET ANOTHER TEST", ret);
} catch (Throwable t) {
// METHOD THREE FAILURE
fail("Exception in method THREE prevented invokation: " + t.toString());
}
}
/**
* <p> Test invokeMethod.
*/
public void testInvokeMethod() throws Exception {
// i'm going to test that the actual calls work first and then try them via reflection
AbstractParent parent = new AlphaBean("parent");
// try testAddChild through abstract superclass
BetaBean childOne = new BetaBean("ChildOne");
assertEquals("Oh no! Badly coded test case! (1)", "ChildOne", parent.testAddChild(childOne));
// let's try MethodUtils version
assertEquals(
"Cannot invoke through abstract class (1)",
"ChildOne",
MethodUtils.invokeMethod(parent, "testAddChild", childOne));
// try adding through interface
AlphaBean childTwo = new AlphaBean("ChildTwo");
assertEquals("Oh no! Badly coded test case! (2)", "ChildTwo", parent.testAddChild(childTwo));
// let's try MethodUtils version
assertEquals(
"Cannot invoke through interface (1)",
"ChildTwo",
MethodUtils.invokeMethod(parent, "testAddChild", childTwo));
Object[] params = new Object[2];
assertEquals("Oh no! Badly coded test case! (3)", "ChildOne", parent.testAddChild2("parameter", childOne));
// let's try MethodUtils version
params[0] = "parameter";
params[1] = childOne;
assertEquals(
"Cannot invoke through abstract class (1)",
"ChildOne",
MethodUtils.invokeMethod(parent, "testAddChild2", params));
assertEquals("Oh no! Badly coded test case! (4)", "ChildTwo", parent.testAddChild2("parameter", childTwo));
// let's try MethodUtils version
params[0] = "parameter";
params[1] = childTwo;
assertEquals(
"Cannot invoke through abstract class (1)",
"ChildTwo",
MethodUtils.invokeMethod(parent, "testAddChild2", params));
// test that exception is correctly thrown when a method cannot be found with matching params
try {
// the next line
parent = new AlphaBean("parent");
childOne = new BetaBean("ChildOne");
MethodUtils.invokeMethod(parent, "bogus", childOne);
// should get here!
fail("No exception thrown when no appropriate method exists");
} catch (NoSuchMethodException e) {
// this is what we're expecting!
}
MethodUtils.invokeMethod(parent, "getName", null);
MethodUtils.invokeMethod(parent, "getName", null, null);
MethodUtils.invokeExactMethod(parent, "getName", null);
MethodUtils.invokeExactMethod(parent, "getName", null, null);
}
/**
* <p> Test invokeMethod with a primitive.
*/
public void testInvokeMethodWithPrimitives() throws Exception {
// first test that the bean works
PrimitiveBean bean = new PrimitiveBean();
bean.setFloat(20.0f);
bean.setLong(10l);
bean.setBoolean(true);
bean.setInt(12);
bean.setDouble(25.5d);
assertEquals("Bug in PrimitiveBean (1)", 20.0f, bean.getFloat(), 0.01f);
assertEquals("Bug in PrimitiveBean (2)", 10, bean.getLong());
assertEquals("Bug in PrimitiveBean (3)", true, bean.getBoolean());
assertEquals("Bug in PrimitiveBean (4)", 12, bean.getInt());
assertEquals("Bug in PrimitiveBean (5)", 25.5d, bean.getDouble(), 0.01f);
bean = new PrimitiveBean();
MethodUtils.invokeMethod(bean, "setBoolean", new Boolean(true));
assertEquals("Call boolean property using invokeMethod", true, bean.getBoolean());
bean = new PrimitiveBean();
MethodUtils.invokeMethod(bean, "setFloat", new Float(20.0f));
assertEquals("Call float property using invokeMethod", 20.0f, bean.getFloat(), 0.01f);
bean = new PrimitiveBean();
MethodUtils.invokeMethod(bean, "setLong", new Long(10));
assertEquals("Call float property using invokeMethod", 10, bean.getLong());
bean = new PrimitiveBean();
MethodUtils.invokeMethod(bean, "setInt", new Integer(12));
assertEquals("Set float property using invokeMethod", 12, bean.getInt());
bean = new PrimitiveBean();
MethodUtils.invokeMethod(bean, "setDouble", new Double(25.5d));
assertEquals("Set float property using invokeMethod", 25.5d, bean.getDouble(), 0.01d);
}
public void testStaticInvokeMethod() throws Exception {
Object value = null;
int current = TestBean.currentCounter();
value = MethodUtils.invokeStaticMethod(TestBean.class, "currentCounter", new Object[0]);
assertEquals("currentCounter value", current, ((Integer) value).intValue());
MethodUtils.invokeStaticMethod(TestBean.class, "incrementCounter", new Object[0]);
current++;
value = MethodUtils.invokeStaticMethod(TestBean.class, "currentCounter", new Object[0]);
assertEquals("currentCounter value", current, ((Integer) value).intValue());
MethodUtils.invokeStaticMethod(TestBean.class, "incrementCounter", new Object[] { new Integer(8) } );
current += 8;
value = MethodUtils.invokeStaticMethod(TestBean.class, "currentCounter", new Object[0]);
assertEquals("currentCounter value", current, ((Integer) value).intValue());
MethodUtils.invokeExactStaticMethod(TestBean.class, "incrementCounter",
new Object[] { new Integer(8) }, new Class[] { Number.class } );
current += 16;
value = MethodUtils.invokeStaticMethod(TestBean.class, "currentCounter", new Object[0]);
assertEquals("currentCounter value", current, ((Integer) value).intValue());
}
/**
* Simple tests for accessing static methods via invokeMethod().
*/
public void testSimpleStatic1() {
TestBean bean = new TestBean();
Object value = null;
int current = TestBean.currentCounter();
try {
// Return initial value of the counter
value = MethodUtils.invokeMethod
(bean, "currentCounter", new Object[0], new Class[0]);
assertNotNull("currentCounter exists", value);
assertTrue("currentCounter type",
value instanceof Integer);
assertEquals("currentCounter value",
current,
((Integer) value).intValue());
// Increment via no-arguments version
MethodUtils.invokeMethod
(bean, "incrementCounter", new Object[0], new Class[0]);
// Validate updated value
current++;
value = MethodUtils.invokeMethod
(bean, "currentCounter", new Object[0], new Class[0]);
assertNotNull("currentCounter exists", value);
assertTrue("currentCounter type",
value instanceof Integer);
assertEquals("currentCounter value",
current,
((Integer) value).intValue());
// Increment via specified-argument version
MethodUtils.invokeMethod
(bean, "incrementCounter",
new Object[] { new Integer(5) },
new Class[] { Integer.TYPE });
// Validate updated value
current += 5;
value = MethodUtils.invokeMethod
(bean, "currentCounter", new Object[0], new Class[0]);
assertNotNull("currentCounter exists", value);
assertTrue("currentCounter type",
value instanceof Integer);
assertEquals("currentCounter value",
current,
((Integer) value).intValue());
} catch (Exception e) {
fail("Threw exception" + e);
}
}
/**
* Simple tests for accessing static methods via invokeExactMethod().
*/
public void testSimpleStatic2() {
TestBean bean = new TestBean();
Object value = null;
int current = TestBean.currentCounter();
try {
// Return initial value of the counter
value = MethodUtils.invokeExactMethod
(bean, "currentCounter", new Object[0], new Class[0]);
assertNotNull("currentCounter exists", value);
assertTrue("currentCounter type",
value instanceof Integer);
assertEquals("currentCounter value",
current,
((Integer) value).intValue());
// Increment via no-arguments version
MethodUtils.invokeExactMethod
(bean, "incrementCounter", new Object[0], new Class[0]);
// Validate updated value
current++;
value = MethodUtils.invokeExactMethod
(bean, "currentCounter", new Object[0], new Class[0]);
assertNotNull("currentCounter exists", value);
assertTrue("currentCounter type",
value instanceof Integer);
assertEquals("currentCounter value",
current,
((Integer) value).intValue());
// Increment via specified-argument version
MethodUtils.invokeExactMethod
(bean, "incrementCounter",
new Object[] { new Integer(5) },
new Class[] { Integer.TYPE });
// Validate updated value
current += 5;
value = MethodUtils.invokeExactMethod
(bean, "currentCounter", new Object[0], new Class[0]);
assertNotNull("currentCounter exists", value);
assertTrue("currentCounter type",
value instanceof Integer);
assertEquals("currentCounter value",
current,
((Integer) value).intValue());
} catch (Exception e) {
fail("Threw exception" + e);
}
}
/**
* Simple tests for accessing static methods via getAccessibleMethod()
*/
public void testSimpleStatic3() {
Object value = null;
int current = TestBean.currentCounter();
try {
// Acquire the methods we need
Method currentCounterMethod = MethodUtils.getAccessibleMethod
(TestBean.class, "currentCounter",
new Class[0]);
assertNotNull("currentCounterMethod exists",
currentCounterMethod);
assertEquals("currentCounterMethod name",
"currentCounter",
currentCounterMethod.getName());
assertEquals("currentCounterMethod args",
0,
currentCounterMethod.getParameterTypes().length);
assertTrue("currentCounterMethod public",
Modifier.isPublic(currentCounterMethod.getModifiers()));
assertTrue("currentCounterMethod static",
Modifier.isStatic(currentCounterMethod.getModifiers()));
Method incrementCounterMethod1 = MethodUtils.getAccessibleMethod
(TestBean.class, "incrementCounter",
new Class[0]);
assertNotNull("incrementCounterMethod1 exists",
incrementCounterMethod1);
assertEquals("incrementCounterMethod1 name",
"incrementCounter",
incrementCounterMethod1.getName());
assertEquals("incrementCounterMethod1 args",
0,
incrementCounterMethod1.getParameterTypes().length);
assertTrue("incrementCounterMethod1 public",
Modifier.isPublic(incrementCounterMethod1.getModifiers()));
assertTrue("incrementCounterMethod1 static",
Modifier.isStatic(incrementCounterMethod1.getModifiers()));
Method incrementCounterMethod2 = MethodUtils.getAccessibleMethod
(TestBean.class, "incrementCounter",
new Class[] { Integer.TYPE });
assertNotNull("incrementCounterMethod2 exists",
incrementCounterMethod2);
assertEquals("incrementCounterMethod2 name",
"incrementCounter",
incrementCounterMethod2.getName());
assertEquals("incrementCounterMethod2 args",
1,
incrementCounterMethod2.getParameterTypes().length);
assertTrue("incrementCounterMethod2 public",
Modifier.isPublic(incrementCounterMethod2.getModifiers()));
assertTrue("incrementCounterMethod2 static",
Modifier.isStatic(incrementCounterMethod2.getModifiers()));
// Return initial value of the counter
value = currentCounterMethod.invoke(null, new Object[0]);
assertNotNull("currentCounter exists", value);
assertTrue("currentCounter type",
value instanceof Integer);
assertEquals("currentCounter value",
current,
((Integer) value).intValue());
// Increment via no-arguments version
incrementCounterMethod1.invoke(null, new Object[0]);
// Validate updated value
current++;
value = currentCounterMethod.invoke(null, new Object[0]);
assertNotNull("currentCounter exists", value);
assertTrue("currentCounter type",
value instanceof Integer);
assertEquals("currentCounter value",
current,
((Integer) value).intValue());
// Increment via specified-argument version
incrementCounterMethod2.invoke(null,
new Object[] { new Integer(5) });
// Validate updated value
current += 5;
value = currentCounterMethod.invoke(null, new Object[0]);
assertNotNull("currentCounter exists", value);
assertTrue("currentCounter type",
value instanceof Integer);
assertEquals("currentCounter value",
current,
((Integer) value).intValue());
} catch (Exception e) {
fail("Threw exception" + e);
}
}
public void testPublicSub() throws Exception {
// make sure that bean does what it should
PublicSubBean bean = new PublicSubBean();
assertEquals("Start value (foo)", bean.getFoo(), "This is foo");
assertEquals("Start value (bar)", bean.getBar(), "This is bar");
bean.setFoo("new foo");
bean.setBar("new bar");
assertEquals("Set value (foo)", bean.getFoo(), "new foo");
assertEquals("Set value (bar)", bean.getBar(), "new bar");
// see if we can access public methods in a default access superclass
// from a public access subclass instance
MethodUtils.invokeMethod(bean, "setFoo", "alpha");
assertEquals("Set value (foo:2)", bean.getFoo(), "alpha");
MethodUtils.invokeMethod(bean, "setBar", "beta");
assertEquals("Set value (bar:2)", bean.getBar(), "beta");
Method method = null;
try {
method = MethodUtils.getAccessibleMethod(PublicSubBean.class, "setFoo", String.class);
} catch (Throwable t) {
fail("getAccessibleMethod() setFoo threw " + t);
}
assertNotNull("getAccessibleMethod() setFoo is Null", method);
try {
method.invoke(bean, new Object[] {"1111"});
} catch (Throwable t) {
fail("Invoking setFoo threw " + t);
}
assertEquals("Set value (foo:3)", "1111", bean.getFoo());
try {
method = MethodUtils.getAccessibleMethod(PublicSubBean.class, "setBar", String.class);
} catch (Throwable t) {
fail("getAccessibleMethod() setBar threw " + t);
}
assertNotNull("getAccessibleMethod() setBar is Null", method);
try {
method.invoke(bean, new Object[] {"2222"});
} catch (Throwable t) {
fail("Invoking setBar threw " + t);
}
assertEquals("Set value (bar:3)", "2222", bean.getBar());
}
public void testParentMethod() throws Exception {
OutputStream os = new PrintStream(System.out);
PrintStream ps = new PrintStream(System.out);
A a = new A();
MethodUtils.invokeMethod(a, "foo", os);
assertTrue("Method Invoked(1)", a.called);
a = new A();
MethodUtils.invokeMethod(a, "foo", ps);
assertTrue("Method Invoked(2)", a.called);
}
/**
* Test {@link MethodUtils#clearCache()}.
*/
public void testClearCache() {
MethodUtils.clearCache(); // make sure it starts empty
PublicSubBean bean = new PublicSubBean();
try {
MethodUtils.invokeMethod(bean, "setFoo", "alpha");
} catch (Throwable t) {
fail("invokeMethod() threw " + t);
}
assertEquals(1, MethodUtils.clearCache());
assertEquals(0, MethodUtils.clearCache());
}
/**
* Test {@link MethodUtils#setCacheMethods(boolean)}.
*/
public void testSetCacheMethods() {
MethodUtils.clearCache(); // make sure it starts empty
// caching
MethodUtils.setCacheMethods(true);
PublicSubBean bean = new PublicSubBean();
try {
MethodUtils.invokeMethod(bean, "setFoo", "alpha");
} catch (Throwable t) {
fail("invokeMethod() threw " + t);
}
assertEquals(1, MethodUtils.clearCache());
assertEquals(0, MethodUtils.clearCache());
// no caching
MethodUtils.setCacheMethods(false);
try {
MethodUtils.invokeMethod(bean, "setFoo", "alpha");
} catch (Throwable t) {
fail("invokeMethod() threw " + t);
}
assertEquals(0, MethodUtils.clearCache());
// reset default
MethodUtils.setCacheMethods(true);
}
}
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