source: dialogmanager/src/test/java/tudelft/dialogmanager/UpdateFunctionTest.java@ 44

package tudelft.dialogmanager;

import static org.junit.Assert.assertEquals;

import java.io.IOException;
import java.util.Arrays;
import java.util.List;

import org.junit.Before;
import org.junit.Test;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;

import tudelft.dialogmanager.parameters.DoubleValue;
import tudelft.dialogmanager.parameters.ParameterValue;

public class UpdateFunctionTest {

        private final ObjectMapper jackson = new ObjectMapper();
        private final String serialized = "{\"AddFunction\":[[\"a\",\"b\"],[\"sum\"]]}";;
        private final AddFunction testf = new AddFunction(
                        Arrays.asList(Arrays.asList("a", "b"), Arrays.asList("sum")));

        @Before
        public void before() {
                jackson.registerSubtypes(AddFunction.class);
        }

        @Test
        public void testSerialize() throws JsonProcessingException {

                String text = jackson.writeValueAsString(testf);
                System.out.println(text);

                assertEquals(serialized, text);
        }

        @Test
        public void testDeserialize()
                        throws JsonParseException, JsonMappingException, IOException {
                UpdateFunction func = jackson.readValue(serialized,
                                UpdateFunction.class);
                assertEquals(testf, func);
        }

        @Test
        public void testFunctionCall() {
                DoubleValue a = new DoubleValue(3d);
                DoubleValue b = new DoubleValue(4d);
                DoubleValue sum = new DoubleValue(7d);
                assertEquals(Arrays.asList(sum), testf.call(Arrays.asList(a, b)));
        }

}

/**
 * Function that computes sum of argumets
 */
class AddFunction extends UpdateFunction {

        @JsonCreator
        public AddFunction(List<List<String>> inout) {
                super(inout);
        }

        @Override
        public List<ParameterValue> call(List<ParameterValue> inargs) {
                Double a = ((DoubleValue) inargs.get(0)).getValue();
                Double b = ((DoubleValue) inargs.get(1)).getValue();
                return Arrays.asList(new DoubleValue(a + b));
        }

}