The document discusses Groovy, a dynamic language for the Java Virtual Machine. It has features from Python, Ruby, and Smalltalk, but uses Java-like syntax. Examples show Hello World programs in Java and Groovy. Later sections discuss Grails, a web framework for Groovy, and G*Magazine, a publication about Groovy. The document contains code samples for defining a Book domain class in Grails, implementing services with Spring Security annotations, writing Spock specifications, and Geb tests using the Page Object pattern.

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4. JSR241
• Groovyis an agile, dynamic
programming language for the Java
Virtual Machine.
• Groovyincludes features found in
Python, Ruby, and Smalltalk, but
uses syntax similar to the Java
programming language.
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5. HelloWorld.java
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello, World!");
}
}
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6. HelloWorld.groovy
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello, World!");
}
}
Java
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7. HelloWorld.groovy
println "Hello, World!"
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8. Grails
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11. G*Magazine
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12. G*Magazine Vol.3
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28. class Book {
String title
String isbn
static constraints = {
title blank:false
isbn blank:false, unique:true
}
}
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29. class Book {
static mapWith = 'mongo'
String title
String isbn
static constraints = {
title blank:false
isbn blank:false, unique:true
}
}
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36. class FolderService {
void rename(Long id, String newName) {
def folder = Folder.get(id)
folder.name = newName
folder.save()
}
List<Folder> findAll() {
Folder.findAll()
}
}
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37. class FolderService {
@PreAuthorize("hasPermission(#id, 'sample.Folder', admin)")
void rename(Long id, String newName) {
def folder = Folder.get(id)
folder.name = newName
folder.save()
}
@PostFilter("hasPermission(filterObject, read)")
List<Folder> findAll() {
Folder.findAll()
}
}
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40. import spock.lang.*
class HelloSpock extends Specification {
def " "() {
expect:
name.size() == length
where:
name | length
"Spock" | 5
"Kirk" | 4
"Scotty" | 6
}
}
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41. @Test
public void test() {
assert 1 + 1 * 2 == 4
}
//
Assertion failed:
assert 1 + 1 * 2 == 4
| | |
3 2 false
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43. class LoginSpec extends GebSpec {
def ' '() {
when: ' '
to 'login'
at { title == 'Login' }
and: ' / '
$('input[name="username"]').value 'username'
$('input[name="password"]').value 'password'
$('input[name="login_button"]').click()
then: ' '
at { title == 'Welcome' }
}
}
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44. class LoginPage {
static at = { title == 'Login'}
static content = {
username { $('input[name="username"]') }
password { $('input[name="password"]') }
loginButton { $('input[name="login_button"]') }
}
}
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45. class LoginSpec extends GebSpec {
def ' '() {
given: ' '
to LoginPage
when: ' / '
username = 'username'
password = 'password'
loginButton.click()
then: ' '
at TopPage
}
}
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46. class LoginSpec extends GebSpec {
def ' '() {
given:
new User(username:'user', password:'pass').save()
to LoginPage
when:
username = 'username'
password = 'password'
loginButton.click()
then:
at TopPage
}
}
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47. class LoginSpec extends GebSpec {
def ' '() {
given:
fixtureLoader.load {
user User, username:'user', password:'pass'
admin User, username:'admin', password:'pass'
}
to LoginPage
when:
username = 'username'
password = 'password'
loginButton.click()
then:
at TopPage
}
}
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