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ArrayTest.java
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ArrayTest.java
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/**
* Copyright (c) 2012-2017, jcabi.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met: 1) Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer. 2) Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution. 3) Neither the name of the jcabi.com nor
* the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jcabi.immutable;
import com.jcabi.aspects.Tv;
import java.util.Arrays;
import java.util.Collection;
import java.util.LinkedList;
import org.hamcrest.MatcherAssert;
import org.hamcrest.Matchers;
import org.junit.Assert;
import org.junit.Test;
/**
* Test case for {@link Array}.
* @author Yegor Bugayenko (yegor@woquo.com)
* @version $Id$
*/
@SuppressWarnings("PMD.TooManyMethods")
public final class ArrayTest {
/**
* Array can work as an array.
* @throws Exception If some problem inside
*/
@Test
public void worksAsANormalArray() throws Exception {
final Collection<Integer> list = new LinkedList<Integer>();
list.add(Tv.TEN);
list.add(Tv.FIVE);
final Collection<Integer> array = new Array<Integer>(list);
MatcherAssert.assertThat(array, Matchers.hasItem(Tv.TEN));
MatcherAssert.assertThat(array, Matchers.hasSize(2));
}
/**
* Array can build array fluently.
* @throws Exception If some problem inside
*/
@Test
public void buildsArrayFluently() throws Exception {
MatcherAssert.assertThat(
new Array<Integer>()
.with(Tv.FIVE)
.with(Tv.TEN)
.with(Tv.THOUSAND)
.with(0, Tv.TEN)
.with(Tv.THREE, Tv.THREE)
.with(1, Tv.THOUSAND),
Matchers.allOf(
Matchers.<Integer>iterableWithSize(Tv.FOUR),
Matchers.contains(Tv.TEN, Tv.THOUSAND, Tv.THOUSAND, Tv.THREE)
)
);
}
/**
* Array can remove items by index.
* @throws Exception If some problem inside
*/
@Test
public void removesElementsByIndex() throws Exception {
MatcherAssert.assertThat(
new Array<Integer>()
.with(Tv.FIVE)
.with(Tv.TEN)
.with(Tv.THOUSAND)
.withoutIndex(0)
.withoutIndex(0)
.withoutIndex(0),
Matchers.empty()
);
}
/**
* Array can remove items.
* @throws Exception If some problem inside
*/
@Test
public void removesElements() throws Exception {
MatcherAssert.assertThat(
new Array<Integer>()
.with(Tv.FIVE)
.with(Tv.TEN)
.with(Tv.THOUSAND)
.without(Tv.FIVE)
.without(Tv.THREE)
.without(Tv.MILLION),
Matchers.hasSize(2)
);
}
/**
* Array can encapsulate iterables.
* @throws Exception If some problem inside
* @since 0.12
*/
@Test
public void encapsulatesIterables() throws Exception {
final Iterable<Integer> list = Arrays.asList(Tv.TEN, Tv.FIVE);
MatcherAssert.assertThat(
new Array<Integer>(list),
Matchers.hasItem(Tv.TEN)
);
}
/**
* Array can encapsulate another Array instance.
*/
@Test
public void encapsulatesArrays() {
final Array<Integer> array = new Array<Integer>(Tv.TEN, Tv.FIVE);
array.with(Tv.MILLION);
MatcherAssert.assertThat(
new Array<Integer>(array),
Matchers.hasItem(Tv.TEN)
);
}
/**
* Array can find index of an object.
* @throws Exception If some problem inside
*/
@Test
public void findsIndexOfObject() throws Exception {
MatcherAssert.assertThat(
new Array<Integer>(Tv.FIVE, 2, 2, Tv.THREE).indexOf(2),
Matchers.equalTo(1)
);
MatcherAssert.assertThat(
new Array<Integer>(Tv.FIVE, 2, 2, Tv.THREE).indexOf(0),
Matchers.equalTo(-1)
);
}
/**
* Array can find last index of an object.
* @throws Exception If some problem inside
*/
@Test
public void findsLastIndexOfObject() throws Exception {
MatcherAssert.assertThat(
new Array<Integer>(1, 1, Tv.TEN, Tv.TEN, Tv.THREE).indexOf(Tv.TEN),
Matchers.equalTo(2)
);
MatcherAssert.assertThat(
new Array<Integer>(1, 1, Tv.TEN, Tv.TEN, Tv.THREE).indexOf(0),
Matchers.equalTo(-1)
);
}
/**
* Array can build a list iterator.
* @throws Exception If some problem inside
*/
@Test
public void makesListIterator() throws Exception {
MatcherAssert.assertThat(
new Array<Integer>(Tv.FIVE, 2, 2, Tv.THREE).listIterator().next(),
Matchers.equalTo(Tv.FIVE)
);
}
/**
* Array can build a list iterator with an index.
* @throws Exception If some problem inside
*/
@Test
public void makesListIteratorWithIndex() throws Exception {
MatcherAssert.assertThat(
new Array<Integer>(Tv.FIVE, 1, 2, Tv.THREE).listIterator(2).next(),
Matchers.equalTo(2)
);
}
/**
* Array can build a sub-list.
* @throws Exception If some problem inside
*/
@Test
public void makesSubList() throws Exception {
MatcherAssert.assertThat(
new Array<Integer>(Tv.FIVE, 1, 2).subList(1, Tv.THREE),
Matchers.contains(1, 2)
);
}
/**
* Array must be independent from data we passed to its ctor.
* @throws Exception If some problem inside
* @checkstyle MagicNumberCheck (10 lines)
*/
@Test
public void isIndependentFromCtorParam() throws Exception {
final Integer[] ints = new Integer[] {1, 2, 3};
final Array<Integer> array = new Array<Integer>(ints);
ints[1] = 0;
Assert.assertTrue(
Arrays.equals(array.toArray(), new Integer[]{1, 2, 3})
);
}
}