src/main/java/org/fest/assertions/internal/Comparables.java
public <T extends Comparable<T>> void assertEqual(Description description, T actual, T expected) {
    assertNotNull(description, actual);
    if (!areEqual(actual, expected)) {
      throw shouldBeEqual(actual, expected).newAssertionError(description);
    }
  }
public <T extends Comparable<T>> void assertEqual(Description description, T actual, T expected) {
    assertNotNull(description, actual);
    if (!areEqual(actual, expected)) {
      throw shouldBeEqual(actual, expected).newAssertionError(description);
    }
  }
Asserts that two values are equal by invoking {@link Comparable#compareTo(Object)}.

@param description the description of the <em>actual</em> value.
@param actual the <em>actual</em> value.
@param expected the <em>expected</em> value.
@throws AssertionError if the <em>actual</em> value is {@code null}.
@throws AssertionError if the <em>actual</em> value is not equal to the expected one. This method will throw a
{@code org.junit.ComparisonFailure} instead if JUnit is in the classpath and the expected and actual
values are not equal.