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BAEL-6040 Add Java List tests. (#13255)

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* BAEL-6040 Add list interface example.

* BAEL-6040 Updated list iterator.

* BAEL-6040 Removed logger import.

* BAEL-6040 Added List interface tests.

* BAEL-6040 Update tests success names.

* BAEL-6040 Small names refactoring.

* BAEL-6040 Add new core-java-collections-5 module.

* BAEL-6040 Create module core-java-collections-list-5.

* BAEL-6040 Create module core-java-collections-list-5.
This commit is contained in:
Vali Tuguran 2023-01-22 05:39:34 +01:00 committed by GitHub
parent 3b770c4dee
commit fa6b78233c
3 changed files with 166 additions and 0 deletions
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5
core-java-modules/core-java-collections-list-5/README.md Normal file
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## Core Java Collections List (Part 5)
This module contains articles about the Java List collection
### Relevant Articles:

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core-java-modules/core-java-collections-list-5/pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>core-java-collections-list-5</artifactId>
<version>0.1.0-SNAPSHOT</version>
<name>core-java-collections-list-5</name>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>
<artifactId>core-java-modules</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>${commons-lang.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
</dependencies>
<properties>
<commons-lang.version>2.2</commons-lang.version>
<commons-lang3.version>3.12.0</commons-lang3.version>
</properties>
</project>

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core-java-modules/core-java-collections-list-5/src/test/java/com/baeldung/java/list/ListUnitTest.java Normal file
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package com.baeldung.java.list;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
import org.junit.Test;
public class ListUnitTest {
@Test
public void givenAFruitList_whenAddNewFruit_thenFruitIsAdded(){
List<String> fruits = new ArrayList<>();
assertEquals("Unexpected number of fruits in the list, should have been 0", 0, fruits.size());
fruits.add("Apple");
assertEquals("Unexpected number of fruits in the list, should have been 1", 1, fruits.size());
}
@Test
public void givenAFruitList_whenContainsFruit_thenFruitIsInTheList(){
List<String> fruits = new ArrayList<>();
fruits.add("Apple");
assertTrue("Apple should be in the fruit list", fruits.contains("Apple"));
assertFalse("Banana should not be in the fruit list", fruits.contains("Banana"));
}
@Test
public void givenAnEmptyFruitList_whenEmptyCheck_thenListIsEmpty(){
List<String> fruits = new ArrayList<>();
assertTrue("Fruit list should be empty", fruits.isEmpty());
fruits.add("Apple");
assertFalse("Fruit list should not be empty", fruits.isEmpty());
}
@Test
public void givenAFruitList_whenIterateOverIt_thenFruitsAreInOrder(){
List<String> fruits = new ArrayList<>();
fruits.add("Apple"); // fruit at index 0
fruits.add("Orange");// fruit at index 1
fruits.add("Banana");// fruit at index 2
int index = 0;
for (Iterator<String> it = fruits.listIterator(); it.hasNext(); ) {
String fruit = it.next();
assertEquals("Fruits should be in order", fruits.get(index++), fruit);
}
}
@Test
public void givenAFruitList_whenRemoveFruit_thenFruitIsRemoved(){
List<String> fruits = new ArrayList<>();
fruits.add("Apple");
fruits.add("Orange");
assertEquals("Unexpected number of fruits in the list, should have been 2", 2, fruits.size());
fruits.remove("Apple");
assertEquals("Unexpected number of fruits in the list, should have been 1", 1, fruits.size());
}
@Test
public void givenAFruitList_whenSetFruit_thenFruitIsUpdated(){
List<String> fruits = new ArrayList<>();
fruits.add("Apple");
fruits.add("Orange");
fruits.set(0, "Banana");
assertEquals("Fruit at index 0 should be Banana", "Banana", fruits.get(0));
}
@Test
public void givenAFruitList_whenSort_thenFruitsAreSorted(){
List<String> fruits = new ArrayList<>();
fruits.add("Apple");
fruits.add("Orange");
fruits.add("Banana");
fruits.sort(Comparator.naturalOrder());
assertEquals("Fruit at index 0 should be Apple", "Apple", fruits.get(0));
assertEquals("Fruit at index 1 should be Banana", "Banana", fruits.get(1));
assertEquals("Fruit at index 2 should be Orange", "Orange", fruits.get(2));
}
@Test
public void givenAFruitList_whenSublist_thenWeGetASublist(){
List<String> fruits = new ArrayList<>();
fruits.add("Apple");
fruits.add("Orange");
fruits.add("Banana");
List<String> fruitsSublist = fruits.subList(0, 2);
assertEquals("Unexpected number of fruits in the sublist, should have been 2", 2, fruitsSublist.size());
assertEquals("Fruit at index 0 should be Apple", "Apple", fruitsSublist.get(0));
assertEquals("Fruit at index 1 should be Orange", "Orange", fruitsSublist.get(1));
}
@Test
public void givenAFruitList_whenToArray_thenWeGetAnArray(){
List<String> fruits = new ArrayList<>();
fruits.add("Apple");
fruits.add("Orange");
fruits.add("Banana");
String[] fruitsArray = fruits.toArray(new String[0]);
assertEquals("Unexpected number of fruits in the array, should have been 3", 3, fruitsArray.length);
assertEquals("Fruit at index 0 should be Apple", "Apple", fruitsArray[0]);
assertEquals("Fruit at index 1 should be Orange", "Orange", fruitsArray[1]);
assertEquals("Fruit at index 2 should be Banana", "Banana", fruitsArray[2]);
}
}