Examples of java.beans.Statement.execute()

java.beans.Statement.execute()
The execute method finds a method whose name is the same as the methodName property, and invokes the method on the target. When the target's class defines many methods with the given name the implementation should choose the most specific method using the algorithm specified in the Java Language Specification (15.11). The dynamic class of the target and arguments are used in place of the compile-time type information and, like the java.lang.reflect.Method class itself, conversion between primitive values and their associated wrapper classes is handled internally.
The following method types are handled as special cases:
- Static methods may be called by using a class object as the target.
- The reserved method name "new" may be used to call a class's constructor as if all classes defined static "new" methods. Constructor invocations are typically considered Expressions rather than Statements as they return a value.
- The method names "get" and "set" defined in the java.util.List interface may also be applied to array instances, mapping to the static methods of the same name in the Array class.

     */
    public void testArraySetter() throws Exception {
        int[] a = { 1, 2, 3 };
        Statement s = new Statement(a, "set", new Object[] { new Integer(1),
                new Integer(7) });
        s.execute();
        assertEquals(7, a[1]);
    }


    /**
     * The test checks the method execute() for static method

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     */
    public void testStatic() throws Exception {
        int currentId = getTestId();
        Statement s = new Statement(StatementTest.class, "nextTestId",
                new Object[] {});
        s.execute();
        assertEquals(++currentId, getTestId());
    }


    /**
     * The test checks the method execute() if exception is thrown on method

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        Bean bean = new Bean("hello");
        Statement s = new Statement(bean, "setChar", new Object[] {
                new Integer(5), new Character('a') });


        try {
            s.execute();
            fail("Exception must be thrown while Bean.setChar(5, 'a') "
                    + "invocation.");
        } catch (Exception e) {
            // correct situation
        }

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    public void testExceptionThrownOnStaticMethodCall() throws Exception {
        Statement s = new Statement(StatementTest.class, "methodWithException",
                new Object[] {});


        try {
            s.execute();
            fail("Exception must be thrown with methodWithException call");
        } catch (SampleException se) {
            // SampleException is thrown as expected
        }
    }

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     * The test checks the method execute() with array as parameter
     */
    public void testMethodWithArrayParam() throws Exception {
        Statement s = new Statement(StatementTest.class, "methodWithIntArray",
                new Object[] { new int[] { 3 } });
        s.execute();
    }


    /**
     * 
     */

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     * valid arguments.
     */
    public void testExecute_NormalInstanceMethod() throws Exception {
        MockObject mo = new MockObject(false);
        Statement t = new Statement(mo, "method", new Object[0]);
        t.execute();
        MockObject.assertCalled("method1", new Object[0]);
        t = new Statement(mo, "method", null);
        t.execute();
        MockObject.assertCalled("method1", new Object[0]);
    }

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        MockObject mo = new MockObject(false);
        Statement t = new Statement(mo, "method", new Object[0]);
        t.execute();
        MockObject.assertCalled("method1", new Object[0]);
        t = new Statement(mo, "method", null);
        t.execute();
        MockObject.assertCalled("method1", new Object[0]);
    }


    /*
     * Test the method execute() with a normal object, normal method and null

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    public void testExecute_NormalInstanceMethodNull() throws Exception {
        MockObject mo = new MockObject(false);
        Object[] arguments = new Object[] { null, null, null };
        Statement t = new Statement(mo, "method", arguments);


        t.execute();
        MockObject.assertCalled("method5", arguments);
    }


    /*
     * Test the method execute() with a normal object, a valid method that

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     */
    public void testExecute_ExceptionalMethod() throws Exception {
        MockObject mo = new MockObject(false);
        Statement t = new Statement(mo, "method", new Object[] { null, null });
        try {
            t.execute();
            fail("Should throw NullPointerException!");
        } catch (NullPointerException ex) {
            // expected
        }
        MockObject.assertCalled("method4", new Object[] { null, null });

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    public void testExecute_NonExistingMethod() throws Exception {
        MockObject mo = new MockObject(false);
        Statement t = new Statement(mo, "method_not_existing", new Object[] {
                null, null });
        try {
            t.execute();
            fail("Should throw NoSuchMethodException!");
        } catch (NoSuchMethodException ex) {
            // expected
        }
    }

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