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CHAPTER
1
Introduction
The SigTest tool makes it possible to easily compare the signatures of two different
implementations of the same API. It verifies that all of the members are present,
reports when new members are added, and checks the specified behavior of each
API member.
Signature Test Basics
A signature test compares two implementations of an API and reports the
differences. SigTest tool compares the signatures of two implementations of the same
API and and can do the following:
■ Create and run a test that verifies that all of the members are present
■ Report when new members are added
■ Check the specified behavior of each API member
The signature test created by SigTest tool can be run independently at the command
line, or under the control of the JavaTest™ harness.
Note – For simplicity, this user’s guide refers to the test harness as the JavaTest
harness. Note that the open source version of the harness, called JT harness, can be
used in its place. The JT harness software can be downloaded from:
http://jtharness.dev.java.net/
The SigTest tool was originally created to assist in the creation of Java technology
compatibility test suites (TCKs). It simplified the process of verifying that the API
signature of a new implementation of a Java technology matched the signature of a
reference implementation of that API.