[MATH-618] Complex Add and Subtract handle NaN arguments differently, but javadoc contracts are the same

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.2, 2.0, 2.1, 2.2
• Fix Version/s: 3.0
• Assignee: Unassigned
• Reporter: Phil Steitz
• Created: 13/Jul/11 20:23
• Updated: 24/Mar/12 16:16
• Resolved: 14/Jul/11 06:08

Description

For both Complex add and subtract, the javadoc states that

     * If either this or <code>rhs</code> has a NaN value in either part,
     * {@link #NaN} is returned; otherwise Inifinite and NaN values are
     * returned in the parts of the result according to the rules for
     * {@link java.lang.Double} arithmetic

Subtract includes an isNaN test and returns Complex.NaN if either complex argument isNaN; but add omits this test. The test should be added to the add implementation (actually restored, since this looks like a code merge problem going back to 1.1).