Welcome to the FEST Fluent Assertions Module

FEST-Assert is a Java library, released under Apache 2.0 license, 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:

1. Object
2. String
3. Collection
4. Map
5. Primitives (boolean, int, char, etc.)
6. Arrays of Object
7. Arrays of primitives
8. BufferedImage
9. Throwable
10. File
11. BigDecimal

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

Examples

  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);