Thank you for your answer!
But I am confused with a problem: We can get the probs information(in executing
data)
and the class file. So if I write something to find where is the probs in the
class file,
would I get the information that I want?
For example, here is the code:
public int greaterThen(int intOne, int intTwo) {
if (intOne > intTwo) {
return 0;
} else {
return 1;
}
}
And when it comes to bytecode:
0: iload_1
1: iload_2
2: if_icmple 7
5: iconst_0
6: ireturn
7: iconst_1
8: ireturn
If JaCoCo insert the prob between the 5 and 6 , for example prob[5] in the
executing data
Without considering the efficiency, can I finally check the class file and
find the prob[5] is
between the 5 and 6, then backstepping to find that the java code execute
“return 0”
and we miss the branch“intOne<=intTwo” ?
Just an idea, and hope for your reply.
Thank you!
发件人: Marc Hoffmann
发送时间: 2017年11月14日 19:46
收件人: [email protected]
主题: Re: [java code coverage] Can we know the details about the branchcoverage
by JaCoCo?
Hi,
short answer: JaCoCo does not provide this information.
JaCoCo is fully based on Java class files (bytecode). The only mapping
back to source are the line numbers contained with the debug
information. Within a line we cannot differentiate what exactly has been
executed.
In OpenJDK there is a experimental flag which provides more fine-grain
mapping. We created a POC using this extra information:
https://github.com/jacoco/jacoco/pull/317
As a workaround you might break complex conditions in multiple lines.
Regards,
-marc
On 2017-11-14 09:19, [email protected] wrote:
> Hello.
>
> I found that if a branch was missed, only a yellow bolck was be shown
> and said "1 of 2 branches missed." or other words like this.
>
> However, could we know some details about it? Such as "1 of 4 branches
> missed. True/False/True/True"?
>
> In other words, is there any possiblity to konw which side of the
> branch have been executed?
>
> Thanks!
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