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Gist for my spock blog post: http://www.jameselsey.co.uk/blogs/techblog/why-all-java-devs-should-at-least-consider-groovy-and-spock-for-testing Place source files in src/main and run `gradle idea` to create an intelliJ project file
apply plugin: 'groovy'
apply plugin: 'idea'
repositories {
mavenCentral()
}
dependencies {
groovy "org.codehaus.groovy:groovy-all:1.8.6"
testCompile "org.spockframework:spock-core:0.6-groovy-1.8"
}
package com.jameselsey.demo.spocktutorial.domain;
public class User {
private int id;
private String name;
private int age;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
package com.jameselsey.demo.spocktutorial.dao;
import com.jameselsey.demo.spocktutorial.domain.User;
public interface UserDao {
public User get(int id);
public User findByName(String name);
public void createUser(User user);
}
package com.jameselsey.demo.spocktutorial.service;
import com.jameselsey.demo.spocktutorial.dao.UserDao;
import com.jameselsey.demo.spocktutorial.domain.User;
public class UserService {
private UserDao userDao;
public UserService(UserDao userDao) {
this.userDao = userDao;
}
public User findUser(int id){
return userDao.get(id);
}
public void createUser(User user){
User existing = userDao.findByName(user.getName());
if(existing == null){
userDao.createUser(user);
} else{
throw new RuntimeException(String.format("User with name %s already exists!", user.getName()));
}
}
}
package com.jameselsey.demo.spocktutorial.service
import com.jameselsey.demo.spocktutorial.dao.UserDao
import com.jameselsey.demo.spocktutorial.domain.User
import spock.lang.Specification
class UserServiceTest extends Specification {
UserService service
UserDao dao = Mock(UserDao)
def setup(){
service = new UserService(dao)
}
def "it gets a user by id"(){
given:
def id = 1
when:
def result = service.findUser(id)
then:
1 * dao.get(id) >> new User(id:id, name:"James", age:27)
result.id == 1
result.name == "James"
result.age == 27
}
def "it saves a new user"(){
given:
def user = new User(id: 1, name: 'James', age:27)
when:
service.createUser(user)
then:
1 * dao.findByName(user.name) >> null
then:
1 * dao.createUser(user)
}
def "it fails to create a user because one already exists with that name"(){
given:
def user = new User(id: 1, name: 'James', age:27)
when:
service.createUser(user)
then:
1 * dao.findByName(user.name) >> user
then:
0 * dao.createUser(user)
then:
def exception = thrown(RuntimeException)
exception.message == "User with name ${user.name} already exists!"
}
}
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