invokemethodtest.java

大名鼎鼎的java动态脚本语言。已经通过了sun的认证

        Object value = invoke(this, "overloadedRemove", new Object[] { new Integer(5)});
        assertEquals("called with integer", "int5", value);
    }

    public void testCallListRemove() throws Throwable {
        List list = new ArrayList();
        list.add("foo");
        list.add("bar");

        Object value = invoke(list, "remove", new Object[] { new Integer(0)});

        assertEquals("Should have just 1 item left: " + list, 1, list.size());
    }

    public void testCoerceGStringToString() throws Throwable {
        GString param = new GString(new Object[] { "James" }) {
            public String[] getStrings() {
                return new String[] { "Hello " };
            }
        };
        Object value = invoke(this, "methodTakesString", new Object[] { param });
        assertEquals("converted GString to string", param.toString(), value);
    }

    public void testCoerceGStringToStringOnGetBytes() throws Throwable {
        GString param = new GString(new Object[] { "US-ASCII" }) {
            public String[] getStrings() {
                return new String[] { "" };
            }
        };
        Object value = invoke("test", "getBytes", new Object[] { param });
        assertEquals("converted GString to string", "test".getBytes("US-ASCII").getClass(), value.getClass());
    }

    public void testBadBDToDoubleCoerce() throws Throwable {
        try {
            Object value = invoke(Math.class, "floor", new BigDecimal("1.7E309"));
        } catch (IllegalArgumentException e) {
            assertTrue("Math.floor(1.7E309) should fail because it is out of range for a Double. "
                    +e,e.getMessage().indexOf("out of range") > 0);
            return;
        }
        fail("Math.floor(1.7E309) should fail because it is out of range for a Double.");        
    }

    public void testClassMethod() throws Throwable {
        Class c = String.class;
        Object value = invoke(c, "getName", null);
        assertEquals("Class.getName()", c.getName(), value);
        c = getClass();
        value = invoke(c, "getName", null);
        assertEquals("Class.getName()", c.getName(), value);
    }

    public void testProtectedMethod() throws Throwable {
        String param = "hello";
        Object value = invoke(this, "aProtectedMethod", param);
        assertEquals("protected method call", aProtectedMethod(param), value);
    }

    public void testPrivateMethod() throws Throwable {
        String param = "hello";
        Object value = invoke(this, "aPrivateMethod", param);
        assertEquals("private method call", aPrivateMethod(param), value);
    }

    public void testStringSubstringMethod() throws Throwable {
        String object = "hello";
        Object value = invoke(object, "substring", new Integer(2));
        assertEquals("substring(2)", object.substring(2), value);

        value = invoke(object, "substring", new Object[] { new Integer(1), new Integer(3)});
        assertEquals("substring(1,3)", object.substring(1, 3), value);
    }

    public void testListGetWithRange() throws Throwable {
        List list = Arrays.asList(new Object[] { "a", "b", "c" });
        Object range = new IntRange(0, 2);
        Object value = invoke(list, "getAt", range);
        assertTrue("Returned List: " + value, value instanceof List);
        List retList = (List) value;
        assertEquals("List size", 3, retList.size());
    }

    public void testSetLenientOnDateFormat() throws Throwable {
        SimpleDateFormat a = new SimpleDateFormat( "MM/dd/yyyy" );
        
        Object value = invoke(a, "setLenient", new Object[] { Boolean.FALSE });
        assertEquals("void method", null, value);
    }

    public void testInvokeUnknownMethod() throws Throwable {
        try {
            Object value = invoke(this, "unknownMethod", "abc");
            fail("Should have thrown an exception");
        }
        catch (GroovyRuntimeException e) {
            // worked
        }
    }

    public void testInvokeMethodWithWrongNumberOfParameters() throws Throwable {
        try {
            Object[] args = { "a", "b" };
            Object value = invoke(this, "unknownMethod", args);
            fail("Should have thrown an exception");
        }
        catch (GroovyRuntimeException e) {
            // worked
        }
    }

    public void testInvokeMethodOnNullObject() throws Throwable {
        try {
            invoke(null, "mockCallWithNoParams", null);
            fail("Should have thrown an exception");
        }
        catch (NullPointerException e) {
            // worked
        }
    }

    // Mock methods used for testing
    //-------------------------------------------------------------------------

    public Object mockCallWithNoParams() {
        return "NoParams";
    }

    public Object mockCallWithOneParam(Object value) {
        assertEquals("Method not passed in the correct value", "abc", value);
        return "OneParam";
    }

    public Object mockCallWithOneNullParam(Object value) {
        assertEquals("Method not passed in the correct value", null, value);
        return "OneParamWithNull";
    }

    public Integer mockCallWithOneCollectionParam(Object collection) {
        Collection coll = InvokerHelper.asCollection(collection);
        return new Integer(coll.size());
    }

    public Object mockOverloadedMethod() {
        return "void";
    }

    public Object mockOverloadedMethod(Object object) {
        return "Object";
    }

    public Object mockOverloadedMethod(Number object) {
        return "Number";
    }

    public Object mockOverloadedMethod(String object) {
        return "String";
    }

    public Object mockOverloadedMethod(Object object, Object bar) {
        return "Object,Object";
    }

    public Object mockOverloadedMethod(Object object, Object[] array) {
        return "Object,Object[]";
    }

    public Object badOverload(String a, Object b) {
        return "String, Object";
    }

    public Object badOverload(Object a, String b) {
        return "Object, String";
    }

    public Object methodTakesString(String x) {
        return x;
    }

    public Object overloadedRemove(int idx) {
        return "int" + idx;
    }

    public Object overloadedRemove(Object value) {
        return "Object" + value;
    }

    // Implementation methods
    //-------------------------------------------------------------------------

    protected Object aProtectedMethod(String param) {
        return param + " there!";
    }

    private Object aPrivateMethod(String param) {
        return param + " James!";
    }

    protected void assertMethodCall(Object object, String method, Object param, Object expected) {
        Object value = InvokerHelper.invokeMethod(object, method, new Object[] { param });
        assertEquals("result of method: " + method, expected, value);
    }

    /**
	 * Asserts that invoking the method chooser finds the right overloaded
	 * method implementation
	 * 
	 * @param expected
	 *            is the expected value of the method
	 * @param arguments
	 *            the argument(s) to the method invocation
	 */
    protected void assertMethodChooser(Object expected, Object arguments) throws Throwable {
        Object value = invoke(this, "mockOverloadedMethod", arguments);

        assertEquals("Invoking overloaded method for arguments: " + InvokerHelper.toString(arguments), expected, value);
    }

    protected Object invoke(Object object, String method, Object args) throws Throwable {
        try {
            return invoker.invokeMethod(object, method, args);
        }
        catch (InvokerInvocationException e) {
            throw e.getCause();
        }
    }
}