Random Beans (formerly jPopulator) is a library that generates random Java beans. Generating random data is a common requirement in software testing, and this task can quickly become tedious when the domain model involves many related classes. Random Beans tries to make this task easier.
Random Beans provides the Populator API that is able to generate random instances of a given type:
Populator populator = new PopulatorBuilder().build();
Person person = populator.populateBean(Person.class);This snippet will generate a random instance of the Person type.
Populating a Java object with random data can look easy at first glance, unless your domain model involves many related classes. Let's see a quick example, suppose you have the following classes:
With Random Beans, generating a random Person object is done with the previous snippet. The library will recursively populate
all the object graph. Without Random Beans, you would write something like:
Street street = new Street(12, (byte) 1, "Oxford street");
Address address = new Address(street, "123456", "London", "United Kingdom");
Person person = new Person("Foo", "Bar", "[email protected]", Gender.MALE, address);And if these classes do not provide constructors with parameters (may be some legacy beans you don't have the control over), you would write:
Street street = new Street();
street.setNumber(12);
street.setType((byte) 1);
street.setName("Oxford street");
Address address = new Address();
address.setStreet(street);
address.setZipCode("123456");
address.setCity("London");
address.setCountry("United Kingdom");
Person person = new Person();
person.setFirstName("Foo");
person.setLastName("Bar");
person.setEmail("[email protected]");
person.setGender(Gender.MALE);
person.setAddress(address);As you can see, Random Beans can tremendously reduce the code of generating random test data than doing it by hand.
| Item | Link |
|---|---|
| Documentation | https://github.com/benas/random-beans/wiki |
| Continuous integration | Build job @ Travis CI |
| Agile Board | Backlog items @ waffle.io |
| Code coverage |  |
| Dependencies |  |
- The current stable version is
1.2.0: - The current development version is
2.0.0-SNAPSHOT:
In order to use snapshot versions, you need to add the following maven repository in your pom.xml:
<repository>
<id>ossrh</id>
<url>https://oss.sonatype.org/content/repositories/snapshots</url>
</repository>You are welcome to contribute to the project with pull requests on GitHub.
If you believe you found a bug, please use the issue tracker.
If you have any question, suggestion, or feedback, do not hesitate to use the Gitter channel of the project.
- Alberto Lagna
- Adriano Machado
- Eric Taix
- Jose Manuel Prieto
- Nikola Milivojevic
- Rémi Alvergnat
- Fred Eckertson
- Pascal Schumacher
Thank you all for your contributions!
Random Beans is released under the 
The MIT License
Copyright (c) 2016, Mahmoud Ben Hassine ([email protected])
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.