jtreg adds additional backslashes in Strings that are written to System.out/err?

[Jaikiran Pai]

Any inputs? Is this a bug or an intentional implementation detail?

-Jaikiran

On 29/08/21 6:54 pm, Jaikiran Pai wrote:
> Please consider this trivial Java code which prints to System.out:
>
> public class FooTest {
>     public static void main(final String[] args) throws Exception {
>         final String m = "hello \\ world";
>         System.out.println("Message is " + m);
>     }
> }
>
> When you run this as Java code using the "java" command, the output 
> that gets printed is (as expected):
>
> Message is hello \ world
>
> Now, if I convert this Java code a jtreg test as follows (without any 
> code change, just adding jtreg tags):
>
> /**
>  * @test
>  * @run main FooTest
>  */
> public class FooTest {
>     public static void main(final String[] args) throws Exception {
>         final String m = "hello \\ world";
>         System.out.println("Message is " + m);
>     }
> }
>
> Running it as a jtreg test, generates a report which has the 
> System.out section that is:
>
> ----------System.out:(1/26)*----------
> Message is hello \\ world
>
> Notice the unexpected additional backslash in that output. Is this 
> intentional?
>
> In a non-trivial test case, that I was working on, it took me a (long) 
> while to figure out that it was jtreg which was adding the additional 
> backslash in the output and it wasn't my test case that had something 
> wrong.
>
> For reference, jtreg -version gives:
>
> jtreg -version
> jtreg 6-dev+0
> Installed in /jtreg/build/images/jtreg/lib/jtreg.jar
> Running on platform version 1.8.0_265 from 
> /adoptopenjdk-8.jdk/Contents/Home/jre.
> Built with Java(TM) 2 SDK, Version 1.8.0_265-b01 on June 27, 2021.
> Copyright (c) 1999, 2021, Oracle and/or its affiliates. All rights 
> reserved.
> Use is subject to license terms.
> JT Harness, version 6.0 ea b14 (June 27, 2021)
> JCov 3.0-2
> Java Assembler Tools, version 7.0 ea b09 (June 27, 2021)
> TestNG (testng.jar): version 7.3.0
> TestNG (jcommander.jar): version unknown
> TestNG (guice.jar): version 4.2.3
> JUnit (junit.jar): version 4.13.2
> JUnit (hamcrest.jar): version 2.2
>
> -Jaikiran
>
>
>
>