Assertion methods bound to the type they apply. The entry point is any of the "assertThat" methods in {@link org.fest.assertions.Assertions} (assertion classes cannot be instantiated directly.)

For example:

 
int removed = employees.removeFired();
{@link org.fest.assertions.Assertions#assertThat(int) assertThat}(removed).{@link org.fest.assertions.IntAssert#isZero isZero}();

List<Employee> newEmployees = employees.hired(TODAY);
{@link org.fest.assertions.Assertions#assertThat(java.util.Collection) assertThat}(newEmployees).{@link org.fest.assertions.CollectionAssert#hasSize(int) hasSize}(6);