/*
 *  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.openaz.xacml.pdp.std.functions;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

import java.math.BigInteger;
import java.util.ArrayList;
import java.util.List;

import org.apache.openaz.xacml.api.XACML3;
import org.apache.openaz.xacml.pdp.policy.ExpressionResult;
import org.apache.openaz.xacml.pdp.policy.FunctionArgument;
import org.apache.openaz.xacml.pdp.policy.FunctionArgumentAttributeValue;
import org.apache.openaz.xacml.pdp.std.StdFunctions;
import org.apache.openaz.xacml.pdp.std.functions.FunctionDefinitionNumberTypeConversion;
import org.apache.openaz.xacml.std.datatypes.DataTypes;
import org.junit.Test;

/**
 * Tests for various classes containing only one function. TO RUN - use jUnit In Eclipse select this file or
 * the enclosing directory, right-click and select Run As/JUnit Test
 */
public class FunctionDefinitionNumberTypeConversionTest {

    /*
     * variables useful in the following tests
     */
    List<FunctionArgument> arguments = new ArrayList<FunctionArgument>();

    @Test
    public void testDouble_to_integer() {
        FunctionArgumentAttributeValue attr1 = null;
        try {
            attr1 = new FunctionArgumentAttributeValue(DataTypes.DT_DOUBLE.createAttributeValue(5.432));

        } catch (Exception e) {
            fail("creating attribute e=" + e);
        }

        FunctionDefinitionNumberTypeConversion<?, ?> fd = (FunctionDefinitionNumberTypeConversion<?, ?>)StdFunctions.FD_DOUBLE_TO_INTEGER;

        // check identity and type of the thing created
        assertEquals(XACML3.ID_FUNCTION_DOUBLE_TO_INTEGER, fd.getId());
        assertEquals(DataTypes.DT_DOUBLE.getId(), fd.getDataTypeArgs().getId());
        assertEquals(DataTypes.DT_INTEGER.getId(), fd.getDataTypeId());

        // just to be safe... If tests take too long these can probably be eliminated
        assertFalse(fd.returnsBag());
        assertEquals(new Integer(1), fd.getNumArgs());

        // test normal add
        arguments.add(attr1);
        ExpressionResult res = fd.evaluate(null, arguments);
        assertTrue(res.isOk());
        BigInteger resValue = (BigInteger)res.getValue().getValue();
        assertEquals(BigInteger.valueOf(5), resValue);
    }

    @Test
    public void testInteger_to_double() {
        FunctionArgumentAttributeValue attr1 = null;
        try {
            attr1 = new FunctionArgumentAttributeValue(DataTypes.DT_INTEGER.createAttributeValue(5));

        } catch (Exception e) {
            fail("creating attribute e=" + e);
        }

        FunctionDefinitionNumberTypeConversion<?, ?> fd = (FunctionDefinitionNumberTypeConversion<?, ?>)StdFunctions.FD_INTEGER_TO_DOUBLE;

        // check identity and type of the thing created
        assertEquals(XACML3.ID_FUNCTION_INTEGER_TO_DOUBLE, fd.getId());
        assertEquals(DataTypes.DT_INTEGER.getId(), fd.getDataTypeArgs().getId());
        assertEquals(DataTypes.DT_DOUBLE.getId(), fd.getDataTypeId());

        // just to be safe... If tests take too long these can probably be eliminated
        assertFalse(fd.returnsBag());
        assertEquals(new Integer(1), fd.getNumArgs());

        // test normal add
        arguments.add(attr1);
        ExpressionResult res = fd.evaluate(null, arguments);
        assertTrue(res.isOk());
        Double resValue = (Double)res.getValue().getValue();
        assertEquals(new Double(5.0), resValue);
    }

}