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Merge pull request #9621 from jesperancinha/BAEL-4281

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[BAEL-4281] Examples of array comparisons
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davidmartinezbarua 2020-07-31 11:16:14 -03:00 committed by GitHub
commit acf23c0a11
6 changed files with 176 additions and 0 deletions
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39
core-java-modules/core-java-arrays-operations-advanced/src/main/java/com/baeldung/arraycompare/Plane.java Normal file
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package com.baeldung.arraycompare;
import java.util.Objects;
public class Plane {
private final String name;
private final String model;
public Plane(String name, String model) {
this.name = name;
this.model = model;
}
public String getName() {
return name;
}
public String getModel() {
return model;
}
@Override
public boolean equals(Object o) {
if (this == o)
return true;
if (o == null || getClass() != o.getClass())
return false;
Plane plane = (Plane) o;
return Objects.equals(name, plane.name) && Objects.equals(model, plane.model);
}
@Override
public int hashCode() {
return Objects.hash(name, model);
}
}

30
core-java-modules/core-java-arrays-operations-advanced/src/test/java/com/baeldung/arraycompare/DeepEqualsCompareUnitTest.java Normal file
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package com.baeldung.arraycompare;
import org.junit.jupiter.api.Test;
import java.util.Arrays;
import static org.assertj.core.api.Assertions.assertThat;
public class DeepEqualsCompareUnitTest {
@Test
public void givenSameContents_whenDeepEquals_thenTrue() {
final Plane[][] planes1 = new Plane[][] { new Plane[] { new Plane("Plane 1", "A320") },
new Plane[] { new Plane("Plane 2", "B738") } };
final Plane[][] planes2 = new Plane[][] { new Plane[] { new Plane("Plane 1", "A320") },
new Plane[] { new Plane("Plane 2", "B738") } };
assertThat(Arrays.deepEquals(planes1, planes2)).isTrue();
}
@Test
public void givenSameContentsWithDifferentOrder_whenDeepEquals_thenFalse() {
final Plane[][] planes1 = new Plane[][] { new Plane[] { new Plane("Plane 1", "A320") },
new Plane[] { new Plane("Plane 2", "B738") } };
final Plane[][] planes2 = new Plane[][] { new Plane[] { new Plane("Plane 2", "B738") },
new Plane[] { new Plane("Plane 1", "A320") } };
assertThat(Arrays.deepEquals(planes1, planes2)).isFalse();
}
}

26
core-java-modules/core-java-arrays-operations-advanced/src/test/java/com/baeldung/arraycompare/EqualsCompareUnitTest.java Normal file
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package com.baeldung.arraycompare;
import org.junit.jupiter.api.Test;
import java.util.Arrays;
import static org.assertj.core.api.Assertions.assertThat;
public class EqualsCompareUnitTest {
@Test
public void givenSameContents_whenEquals_thenTrue() {
final String[] planes1 = new String[] { "A320", "B738", "A321", "A319", "B77W", "B737", "A333", "A332" };
final String[] planes2 = new String[] { "A320", "B738", "A321", "A319", "B77W", "B737", "A333", "A332" };
assertThat(Arrays.equals(planes1, planes2)).isTrue();
}
@Test
public void givenSameContentsDifferentOrder_whenEquals_thenFalse() {
final String[] planes1 = new String[] { "A320", "B738", "A321", "A319", "B77W", "B737", "A333", "A332" };
final String[] planes2 = new String[] { "B738", "A320", "A321", "A319", "B77W", "B737", "A333", "A332" };
assertThat(Arrays.equals(planes1, planes2)).isFalse();
}
}

18
core-java-modules/core-java-arrays-operations-advanced/src/test/java/com/baeldung/arraycompare/LengthsCompareUnitTest.java Normal file
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package com.baeldung.arraycompare;
import org.junit.jupiter.api.Test;
import static org.assertj.core.api.Assertions.assertThat;
public class LengthsCompareUnitTest {
@Test
public void givenSameContent_whenSizeCompare_thenTrue() {
final String[] planes1 = new String[] { "A320", "B738", "A321", "A319", "B77W", "B737", "A333", "A332" };
final Integer[] quantities = new Integer[] { 10, 12, 34, 45, 12, 43, 5, 2 };
assertThat(planes1).hasSize(8);
assertThat(quantities).hasSize(8);
}
}

33
core-java-modules/core-java-arrays-operations-advanced/src/test/java/com/baeldung/arraycompare/OrderCompareUnitTest.java Normal file
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package com.baeldung.arraycompare;
import org.junit.jupiter.api.Test;
import java.util.Arrays;
import java.util.Comparator;
import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.Assert.assertTrue;
public class OrderCompareUnitTest {
@Test
public void givenSameContentDifferentOrder_whenSortedAndDeepEquals_thenTrue() {
final Plane[][] planes1 = new Plane[][] {
new Plane[] { new Plane("Plane 1", "A320"), new Plane("Plane 2", "B738") } };
final Plane[][] planes2 = new Plane[][] {
new Plane[] { new Plane("Plane 2", "B738"), new Plane("Plane 1", "A320") } };
Comparator<Plane> planeComparator = (o1, o2) -> {
if (o1.getName()
.equals(o2.getName())) {
return o2.getModel()
.compareTo(o1.getModel());
}
return o2.getName()
.compareTo(o1.getName());
};
Arrays.sort(planes1[0], planeComparator);
Arrays.sort(planes2[0], planeComparator);
assertThat(Arrays.deepEquals(planes1, planes2)).isTrue();
}
}

30
core-java-modules/core-java-arrays-operations-advanced/src/test/java/com/baeldung/arraycompare/ReferenceCompareUnitTest.java Normal file
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package com.baeldung.arraycompare;
import org.junit.jupiter.api.Test;
import static org.assertj.core.api.Assertions.assertThat;
public class ReferenceCompareUnitTest {
@Test
public void givenSameReferences_whenSame_thenTrue() {
final String[] planes1 = new String[] { "A320", "B738", "A321", "A319", "B77W", "B737", "A333", "A332" };
final String[] planes2 = planes1;
assertThat(planes1).isSameAs(planes2);
planes2[0] = "747";
assertThat(planes1).isSameAs(planes2);
assertThat(planes2[0]).isEqualTo("747");
assertThat(planes1[0]).isEqualTo("747");
}
@Test
public void givenSameContentDifferentReferences_whenSame_thenFalse() {
final String[] planes1 = new String[] { "A320", "B738", "A321", "A319", "B77W", "B737", "A333", "A332" };
final String[] planes2 = new String[] { "A320", "B738", "A321", "A319", "B77W", "B737", "A333", "A332" };
assertThat(planes1).isNotSameAs(planes2);
}
}