methodutilstestcase.java

APACHE 公司出的java bean 工具包

        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.getFoo(), "alpha");
    }
    
    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);
    }
}