FEST Assertions Module has moved to Github !

Check this page :https://github.com/alexruiz/fest-assert-2.x/wiki

The documentation below is for Fest 1.x which is no more maintained, we are focusing our effort to the 2.x version !

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FEST-Assert is a Java library that provides a fluent interface for writing assertions. Its main goal is to improve test code readability and make maintenance of tests easier.

FEST-Assert requires Java SE 5.0 or later and can be used with either JUnit or TestNG.

Currently, this module provides assertions for the following data types:

• Object
• String
• Collection
• Map
• Primitives (boolean, int, char, etc.)
• Arrays of Object
• Arrays of primitives
• BufferedImage
• Throwable
• File
• BigDecimal

It can be downloaded here. For Maven 2 users, details about the project's repository can be found at here.

We have written a migration guide to easily replace JUnit assertions with Fest assertions. Note that FEST & JUnit assertions can coexist together, you don't have to migrate all in one time.

Examples

Some simple example to start.

import static org.fest.assertions.Assertions.assertThat;

int removed = employees.removeFired();
assertThat(removed).isZero();

List<Employee> newEmployees = employees.hired(TODAY);
assertThat(newEmployees).hasSize(6)
                        .contains(frodo, sam);

String[] newHires = employees.newHiresNames();
assertThat(newHires).containsOnly("Gandalf", "Arwen", "Gimli");

assertThat(yoda).isInstanceOf(Jedi.class)
                .isEqualTo(foundJedi)
                .isNotEqualTo(foundSith);