Naming Randoop regression tests

Question

I would like to have my regression tests generated by Randoop 4.2 to be named (Something)RandoopTest.java, so I set the command line flag --regression-test-basename=RandoopTest. When I run Randoop, my regression tests all end in RandoopTest0.java (note the 0). For example, when I run the following command,

java -classpath C:\sandbox\TestJavaProject\bin;%RANDOOP_JAR%
        randoop.main.Main gentests
        --testclass=org.jaffa.datatypes.Currency
        --junit-package-name=org.jaffa.datatypes
        --junit-output-dir=C:\sandbox\TestJavaProject\src\test\java
        --regression-test-basename=CurrencyRandoopTest
        --time-limit=10
        --junit-reflection-allowed=false
        --flaky-test-behavior=DISCARD

I get two files generated, as shown by the console output:

Writing regression JUnit tests...
Created file C:\sandbox\TestJavaProject\src\test\java\org\jaffa\datatypes\CurrencyRandoopTest0.java
Created file C:\sandbox\TestJavaProject\src\test\java\org\jaffa\datatypes\CurrencyRandoopTestDriver.java
Wrote regression JUnit tests.

Is there an easy way to eliminate the 0? I'm curious as to why it is there. I've never noticed any other numbers besides 0 added to the class name. Currently, our maven scripts are designed to run JUit tests that end in "Test", so the 0 is a bother. (I know I can modify the scripts to automatically run JUnit tests that end in "Test0", but it would be nicer if I didn't have to.)

Answer 1

Randoop outputs tests in files named ...Test0,java, ...Test1.java, etc. By default only 500 are put into each numbered file. Randoop usually creates many tests, and putting all of them into one file would violate Java's limits on file size.

Randoop outputs a test suite, which runs all the tests, in a file named ...Test.java with no number at the end of the file name.

The example at the beginning of the Randoop Manual shows these files and how to use them.

If you have never seen Randoop output more than 500 tests, you might want to adjust the command-line arguments to Randoop, to give it more information so that it can generate tests more effectively.

Example

As a concrete example of the files, see directory build/working-directories/naive-collections-test/java/foo/bar/. It will exist after you have run Randoop's own test suite.

It contains the files:

NaiveRegression.java

NaiveRegression0.java
NaiveRegression1.java
NaiveRegression2.java

where the content of NaiveRegression.java is:

@RunWith(Suite.class)
@Suite.SuiteClasses({ NaiveRegression0.class, NaiveRegression1.class, NaiveRegression2.class })
public class NaiveRegression {
}