src/main/java/org/fest/assertions/internal/ByteArrays.java
public void assertContainsOnly(Description description, byte[] actual, byte[] values) {
    arrays.assertContainsOnly(description, actual, values);
  }
public void assertContainsOnly(Description description, byte[] actual, byte[] values) {
    arrays.assertContainsOnly(description, actual, values);
  }
Asserts that the given array contains only the given values and nothing else, in any order.

@param description contains information about the assertion.
@param actual the given array.
@param values the values that are expected to be in the given array.
@throws NullPointerException if the array of values is {@code null}.
@throws IllegalArgumentException if the array of values is empty.
@throws AssertionError if the given array is {@code null}.
@throws AssertionError if the given array does not contain the given values or if the given array contains values
that are not in the given array.