CATG is a concolic unit testing engine for Java programs. The implementation uses ASM for instrumentation. ASM instrumentation instruments (see janala.instrument.) class files at runtime and dumps (see janala.logger.) to a file a log of all instructions executed by the program and all values loaded from local stacks and heaps. A concolic execution engine (see janala.interpreters.*) then takes the log and performs both symbolic and concrete interpretation of the logged instructions.

You must have java, cvc4 (http://cvc4.cs.nyu.edu/downloads/), and python 2.7 in your PATH.

ant build
python testall.py

This runs the tests using online concolic execution. To run tests with offline concolic execution, use

python --offline testall.py

If you want to generate tests on a Java class file having a main method, you need to use the concolic.py script. For example, the following command generates test inputs for the class tests.Testme (the java source of this class can be found in src/tests/Testme.java.

python concolic.py --coverage 100 tests.Testme

python janala/concolic.py -h usage: concolic.py [-h] [--offline] [-v] [-c] [-D D] maxIterations className [arguments [arguments ...]]

positional arguments:

maxIterations   Maximum number of times the program under test can be
              executed.
className       Java class to be tested.
arguments       Arguments passed to the program under test.

optional arguments:

-h, --help      show this help message and exit
--offline       Perform concolic testing offline. An intermediate trace file
              is generated during the execution of the program. offilne
              mode results in 2X slowdown that non-offline mode
-v, --verbose   Print commands that are executed.
-c, --coverage  Compute detailed coverage by rerunning tests.
-D D            JVM options