When using Spock's @IgnoreIf annotation which causes all of the test methods in a test class to be ignored, the whole test class is missing from the test report. This differs from how ignored test methods are reported. Those show up in the report and are just marked as ignored. This behavior is also different than how Maven's surefire test reports report the same test class.

Steps to reproduce:

1. Checkout my fork the spock-example project which has been modified to ignore the HelloSpockSpec

   $> git clone git@github.com:eljobe/spock-example.git
   

2. Run the gradle test task

   $> cd spock-example
   $> ./gradlew test
   

Expected Behavior
In the build/reports/test directory, you can see the HelloSpockSpec in the report, but it is marked as ignored. Or, at least, the methods in the class are marked as ignored.

Observed Behavior
HelloSpockSpec is just missing from the report.
See: https://pepperspages.com/sharing/20160324-test-reports-bug/gradle/

Maven
A maven build of the same repo looks like this:
https://pepperspages.com/sharing/20160324-test-reports-bug/maven/surefire-report.html

To produce that report, I used:

$> mvn surefire-report:report

This makes me think that the error is not in the data made available by Spock, but in Gradle's report generation code itself.

Properties of my environment
OS: OS X version 10.11.4 (15E65)
Gradle Versions: 2.8, 2.11, 2.12
JDK: 1.7
Maven: 3.3.9
Spock: 1.0
Groovy: 2.4