sbt-jacoco plugin not getting executable data from jacoco agent when runing It tests

[rufusmsbennett]

Expected vs Actual Behaviour

Problem ...
We run our service in a separate bash shell on localhost and run "it:jacoco" in another shell to execute our tests. When the tests are complete and the report is generated, we see no coverage from the server side, as if no executable data was retrieved from the jacoco agent. Apparently, it never dumped its executable data, or if it did, the plugin doesn't find it.

It should...
We thought that when the tests are complete, the sbt-jacoco plugin would send a REST call to the jacoco agent telling it to dump, then the plugin would add that data to the coverage report.

Instead it...
The coverage report does not show any coverage on the server side. Note: We can run our service with coverage in IntelliJ and generate a report which shows our test should cover about 80%.

Steps to Reproduce

1. Add the sbt-jacoco plugin: addSbtPlugin("com.github.sbt" % "sbt-jacoco" % "3.0.3")

2. Enable plugin:
   lazy val root = (project in file(".")).enablePlugins(BuildInfoPlugin,JacocoItPlugin) ...

3. In a terminal window, launch service (sbt run) with the jacoco agent using the following JVM arguments:
   export SBT_OPTS="-javaagent:/etc/jacoco/org.jacoco.agent-0.7.6.201602180812-runtime.jar=output=tcpserver,port=6300,address=*"

4. In another terminal window, run the tests: it:jacoco

Environment

• SBT version: 0.13.16
• Plugin version: 3.0.3
• Scala version(s): 2.11.8
• Java version: 1.8.0_60-b27