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BAEL-2766 Added core-groovy-collections module
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@josephine-barboza
josephine-barboza committed Apr 25, 2019
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6 changes: 6 additions & 0 deletions core-groovy-collections/README.md
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# Groovy

## Relevant articles:

- [Maps in Groovy](http://www.baeldung.com/)

131 changes: 131 additions & 0 deletions core-groovy-collections/pom.xml
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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-groovy-collections</artifactId>
<version>1.0-SNAPSHOT</version>
<name>core-groovy-collections</name>
<packaging>jar</packaging>

<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>

<dependencies>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy</artifactId>
<version>${groovy.version}</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-all</artifactId>
<version>${groovy-all.version}</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-dateutil</artifactId>
<version>${groovy.version}</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-sql</artifactId>
<version>${groovy-sql.version}</version>
</dependency>
<dependency>
<groupId>org.junit.platform</groupId>
<artifactId>junit-platform-runner</artifactId>
<version>${junit.platform.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<version>${hsqldb.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.spockframework</groupId>
<artifactId>spock-core</artifactId>
<version>${spock-core.version}</version>
<scope>test</scope>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.codehaus.gmavenplus</groupId>
<artifactId>gmavenplus-plugin</artifactId>
<version>${gmavenplus-plugin.version}</version>
<executions>
<execution>
<goals>
<goal>addSources</goal>
<goal>addTestSources</goal>
<goal>compile</goal>
<goal>compileTests</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-failsafe-plugin</artifactId>
<version>${maven-failsafe-plugin.version}</version>
<dependencies>
<dependency>
<groupId>org.junit.platform</groupId>
<artifactId>junit-platform-surefire-provider</artifactId>
<version>${junit.platform.version}</version>
</dependency>
</dependencies>
<executions>
<execution>
<id>junit5</id>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
<configuration>
<includes>
<include>**/*Test5.java</include>
</includes>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.20.1</version>
<configuration>
<useFile>false</useFile>
<includes>
<include>**/*Test.java</include>
<include>**/*Spec.java</include>
</includes>
</configuration>
</plugin>
</plugins>
</build>

<repositories>
<repository>
<id>central</id>
<url>http://jcenter.bintray.com</url>
</repository>
</repositories>

<properties>
<junit.platform.version>1.0.0</junit.platform.version>
<groovy.version>2.5.6</groovy.version>
<groovy-all.version>2.5.6</groovy-all.version>
<groovy-sql.version>2.5.6</groovy-sql.version>
<hsqldb.version>2.4.0</hsqldb.version>
<spock-core.version>1.1-groovy-2.4</spock-core.version>
<gmavenplus-plugin.version>1.6</gmavenplus-plugin.version>
</properties>
</project>

148 changes: 148 additions & 0 deletions core-groovy-collections/src/test/groovy/com/baeldung/map/MapTest.groovy
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package com.baeldung.map;

import static groovy.test.GroovyAssert.*
import org.junit.Test

class MapTest{

@Test
void createMap() {

def emptyMap = [:]
assertNotNull(emptyMap)

assertTrue(emptyMap instanceof java.util.LinkedHashMap)

def map = [name:"Jerry", age: 42, city: "New York"]
assertTrue(map.size() == 3)
}

@Test
void addItemsToMap() {

def map = [name:"Jerry"]

map["age"] = 42

map.city = "New York"

def hobbyLiteral = "hobby"
def hobbyMap = [(hobbyLiteral): "Singing"]
map.putAll(hobbyMap)

assertTrue(map == [name:"Jerry", age: 42, city: "New York", hobby:"Singing"])
assertTrue(hobbyMap.hobby == "Singing")
assertTrue(hobbyMap[hobbyLiteral] == "Singing")

map.plus([1:20]) // returns new map

map << [2:30]

}

@Test
void getItemsFromMap() {

def map = [name:"Jerry", age: 42, city: "New York", hobby:"Singing"]

assertTrue(map["name"] == "Jerry")

assertTrue(map.name == "Jerry")

def propertyAge = "age"
assertTrue(map[propertyAge] == 42)
}

@Test
void removeItemsFromMap() {

def map = [1:20, a:30, 2:42, 4:34, ba:67, 6:39, 7:49]

def minusMap = map.minus([2:42, 4:34]);
assertTrue(minusMap == [1:20, a:30, ba:67, 6:39, 7:49])

minusMap.removeAll{it -> it.key instanceof String}
assertTrue( minusMap == [ 1:20, 6:39, 7:49])

minusMap.retainAll{it -> it.value %2 == 0}
assertTrue( minusMap == [1:20])
}

@Test
void iteratingOnMaps(){
def map = [name:"Jerry", age: 42, city: "New York", hobby:"Singing"]

map.each{ entry -> println "$entry.key: $entry.value" }

map.eachWithIndex{ entry, i -> println "$i $entry.key: $entry.value" }

map.eachWithIndex{ key, value, i -> println "$i $key: $value" }
}

@Test
void filteringAndSearchingMaps(){
def map = [name:"Jerry", age: 42, city: "New York", hobby:"Singing"]

assertTrue(map.find{ it.value == "New York"}.key == "city")

assertTrue(map.findAll{ it.value == "New York"} == [city : "New York"])

map.grep{it.value == "New York"}.each{ it -> assertTrue(it.key == "city" && it.value == "New York")}

assertTrue(map.every{it -> it.value instanceof String} == false)

assertTrue(map.any{it -> it.value instanceof String} == true)
}

@Test
void collect(){

def map = [1: [name:"Jerry", age: 42, city: "New York"],
2: [name:"Long", age: 25, city: "New York"],
3: [name:"Dustin", age: 29, city: "New York"],
4: [name:"Dustin", age: 34, city: "New York"]]

def names = map.collect{entry -> entry.value.name} // returns only list
assertTrue(names == ["Jerry", "Long", "Dustin", "Dustin"])

def uniqueNames = map.collect([] as HashSet){entry -> entry.value.name}
assertTrue(uniqueNames == ["Jerry", "Long", "Dustin"] as Set)

def idNames = map.collectEntries{key, value -> [key, value.name]}
assertTrue(idNames == [1:"Jerry", 2: "Long", 3:"Dustin", 4: "Dustin"])

def below30Names = map.findAll{it.value.age < 30}.collect{key, value -> value.name}
assertTrue(below30Names == ["Long", "Dustin"])


}

@Test
void group(){
def map = [1:20, 2: 40, 3: 11, 4: 93]

def subMap = map.groupBy{it.value % 2}
println subMap
assertTrue(subMap == [0:[1:20, 2:40 ], 1:[3:11, 4:93]])

def keySubMap = map.subMap([1, 2])
assertTrue(keySubMap == [1:20, 2:40])

}

@Test
void sorting(){
def map = [ab:20, a: 40, cb: 11, ba: 93]

def naturallyOrderedMap = map.sort()
assertTrue([a:40, ab:20, ba:93, cb:11] == naturallyOrderedMap)

def compSortedMap = map.sort({ k1, k2 -> k1 <=> k2 } as Comparator)
assertTrue([a:40, ab:20, ba:93, cb:11] == compSortedMap)

def cloSortedMap = map.sort({ it1, it2 -> it1.value <=> it1.value })
assertTrue([cb:11, ab:20, a:40, ba:93] == cloSortedMap)

}

}
2 changes: 2 additions & 0 deletions pom.xml
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<module>checker-plugin</module>
<module>core-groovy</module>
<module>core-groovy-2</module>
<module>core-groovy-collections</module>
<!-- <module>core-java-10</module> --> <!-- We haven't upgraded to java 10. Fixing in BAEL-10841 -->
<!-- <module>core-java-11</module> --> <!-- We haven't upgraded to java 11. Fixing in BAEL-10841 -->
<!-- <module>core-java-12</module> --> <!-- We haven't upgraded to java 12. Fixing in BAEL-10841 -->
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<module>checker-plugin</module>
<module>core-groovy</module>
<module>core-groovy-2</module>
<module>core-groovy-collections</module>
<!-- <module>core-java-10</module> --> <!-- We haven't upgraded to java 10. Fixing in BAEL-10841 -->
<!-- <module>core-java-11</module> --> <!-- We haven't upgraded to java 11. Fixing in BAEL-10841 -->
<module>core-java-8</module>
Expand Down

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