source: java2python/geniuswebtranslator/geniuswebtest/geniusweb/issuevalue/DiscreteValueSetTest.java@ 889

package geniusweb.issuevalue;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import java.io.IOException;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;

import org.eclipse.jdt.annotation.NonNull;
import org.junit.Test;

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

public class DiscreteValueSetTest {

        private static final @NonNull DiscreteValue A = new DiscreteValue("a");
        private static final @NonNull DiscreteValue A1 = new DiscreteValue("a");
        private static final @NonNull DiscreteValue B = new DiscreteValue("b");
        private final static @NonNull List<DiscreteValue> values = Arrays.asList(A,
                        B);
        private final static @NonNull Collection<DiscreteValue> valuesReverse = Arrays
                        .asList(B, A);

        private static final @NonNull DiscreteValueSet set = new DiscreteValueSet(
                        values);
        private static final @NonNull DiscreteValueSet setReverse = new DiscreteValueSet(
                        valuesReverse);
        private static final @NonNull String asString = "{\"values\":[\"a\",\"b\"]}";
        // private static final String asString = "{\"DiscreteValueSet
        // \":[\"a\",\"b\"]}";
        private static final @NonNull String asString1 = "[\"a\",\"b\"]";

        // SPECIAL. note that the "numbers" have no leading "=" and therefore are
        // parsed as discrete values.
        private static final @NonNull String discretenumbers = "{\"values\":[\"0\",\"1\"]}";
        private static final @NonNull ObjectMapper jackson = new ObjectMapper();

        @Test
        public void testSerialize() throws JsonProcessingException {

                final @NonNull String jsonstr = jackson.writeValueAsString(set);
                //System.out.println(json);
                assertEquals(asString, jsonstr);
        }

        @Test
        public void testDeserialize()
                        throws JsonParseException, JsonMappingException, IOException {
                final @NonNull DiscreteValueSet p = jackson.readValue(asString,
                                DiscreteValueSet.class);
                //System.out.println(p);
                assertEquals(set, p);
        }

        @Test
        public void testDeserializeNumberValues()
                        throws JsonParseException, JsonMappingException, IOException {
                final @NonNull DiscreteValueSet p = jackson.readValue(discretenumbers,
                                DiscreteValueSet.class);
                //System.out.println(p);
                assertEquals("0", p.get(BigInteger.ZERO).getValue()); // not the number
                                                                                                                                // but string
                assertEquals("1", p.get(BigInteger.ONE).getValue());
        }

        @Test
        public void testEquality() {
                assertEquals(set, setReverse);
        }

        @Test
        public void testHashCodeInsensitiveToOrder() {
                assertEquals(set.hashCode(), setReverse.hashCode());
        }

        @Test
        public void testSize() {
                assertEquals(new BigInteger("2"), set.size());
        }

        @Test
        public void testGet() {
                assertEquals(A, set.get(0));
                assertEquals(B, set.get(1));
                assertEquals(A, set.get(BigInteger.ZERO));
                assertEquals(B, set.get(BigInteger.ONE));
        }

        @Test
        public void getValuesTest() {
                assertTrue(values.equals(set.getValues())
                                || valuesReverse.equals(set.getValues()));
        }

        @Test
        public void containsTest() {
                assertTrue(set.contains(A));
                assertTrue(set.contains(A1));
                assertTrue(set.contains(B));
                assertFalse(set.contains(new DiscreteValue("c")));
                assertFalse(set.contains(new DiscreteValue("21112")));
                assertFalse(set.contains(new NumberValue("21112")));
        }

        @Test
        public void iteratorTest1() {
                Iterator<DiscreteValue> it = set.iterator();
                assertEquals(A, it.next());
                assertEquals(B, it.next());
                assertThrows(() -> it.next(), NoSuchElementException.class); // check that there is a next.

        }

        @Test
        public void iteratorTest2() {
                Iterator<DiscreteValue> it = setReverse.iterator();
                assertEquals(B, it.next());
                assertEquals(A, it.next());
                assertThrows(() -> it.next(), NoSuchElementException.class); // check that there is a next.

        }

        /**
         * assert that f throws exception of type e
         * 
         * @param f the function to be called, wrapped as {@link Runnable}
         * @param e the {@link Class} of expected exception
         */
        private static void assertThrows(Runnable f, Class<? extends Throwable> e) {
                try {
                        f.run();
                        throw new AssertionError("Expected " + e.getSimpleName()
                                        + " but nothing was thrown");
                } catch (Throwable actuale) {
                        if (actuale.getClass() != e) {
                                throw new AssertionError("Expected " + e.getSimpleName()
                                                + " but was " + actuale.getClass());
                        }
                }
        }

}