modules/core/src/test/java/org/apache/ignite/lang/GridTupleSelfTest.java

/*
 * 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.ignite.lang;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
import org.apache.ignite.internal.util.lang.GridTuple;
import org.apache.ignite.internal.util.lang.GridTuple3;
import org.apache.ignite.internal.util.typedef.F;
import org.apache.ignite.testframework.junits.common.GridCommonAbstractTest;
import org.apache.ignite.testframework.junits.common.GridCommonTest;
import org.junit.Test;

/**
 *
 */
@GridCommonTest(group = "Lang")
public class GridTupleSelfTest extends GridCommonAbstractTest {
    /** Creates test. */
    public GridTupleSelfTest() {
        super(/*start grid*/false);
    }

    /**
     * JUnit.
     */
    @Test
    public void testGridTupleAsIterable() {
        String str = "A test string";

        Iterable<String> tpl = new GridTuple<>(str);

        Iterator<String> iter = tpl.iterator();

        assert iter != null;

        List<Object> elems = new ArrayList<>();

        while (iter.hasNext())
            elems.add(iter.next());

        assert elems.size() == 1;
        assert str.equals(elems.get(0));

        try {
            iter.next();

            fail("NoSuchElementException must have been thrown.");
        }
        catch (NoSuchElementException e) {
            info("Caught expected exception: " + e);
        }
    }

    /**
     * JUnit.
     */
    @Test
    public void testGridTuple2AsIterable() {
        String str1 = "A test string 1";
        String str2 = "A test string 2";

        Iterable<Object> tpl = new IgniteBiTuple<>(str1, str2);

        Iterator<Object> iter = tpl.iterator();

        assert iter != null;

        List<Object> elems = new ArrayList<>();

        while (iter.hasNext())
            elems.add(iter.next());

        assert elems.size() == 2;
        assert str1.equals(elems.get(0));
        assert str2.equals(elems.get(1));

        try {
            iter.next();

            fail("NoSuchElementException must have been thrown.");
        }
        catch (NoSuchElementException e) {
            info("Caught expected exception: " + e);
        }
    }

    /**
     * JUnit.
     */
    @Test
    public void testGridTuple2AsMap() {
        String str1 = "A test string 1";
        String str2 = "A test string 2";

        IgniteBiTuple<String, String> tpl = new IgniteBiTuple<>();

        tpl.put(str1, str2);

        assertEquals(str2, tpl.get(str1));
        assertEquals(1, tpl.size());

        assert tpl.containsKey(str1);
        assert tpl.containsValue(str2);

        Iterator<Map.Entry<String, String>> it = tpl.entrySet().iterator();

        assert it.hasNext();

        Map.Entry<String, String> next = it.next();

        assertEquals(str1, next.getKey());
        assertEquals(str2, next.getValue());

        assert !it.hasNext();

        next = F.firstEntry(tpl);

        assertEquals(str1, next.getKey());
        assertEquals(str2, next.getValue());

        tpl = new IgniteBiTuple<>();

        assert !tpl.entrySet().iterator().hasNext();
    }

    /**
     * JUnit.
     */
    @Test
    public void testGridTuple3AsIterable() {
        String str1 = "A test string 1";
        String str2 = "A test string 2";
        String str3 = "A test string 3";

        Iterable<Object> tpl = new GridTuple3<>(str1, str2, str3);

        Iterator<Object> iter = tpl.iterator();

        assert iter != null;

        List<Object> elems = new ArrayList<>();

        while (iter.hasNext())
            elems.add(iter.next());

        assert elems.size() == 3;
        assert str1.equals(elems.get(0));
        assert str2.equals(elems.get(1));
        assert str3.equals(elems.get(2));

        try {
            iter.next();

            fail("NoSuchElementException must have been thrown.");
        }
        catch (NoSuchElementException e) {
            info("Caught expected exception: " + e);
        }
    }
}