Xtend IDE: find *.xtend tests cases on the package level

Given is an Xtend Project with two test cases residing in the package foo:

package foo

import org.junit.Test
import static extension org.junit.Assert.assertEquals

class Foo1Test {
	
	@Test def test() {
		"bar".assertEquals("bar")
	}
}

package foo

import org.junit.Test
import static extension org.junit.Assert.assertEquals

class Foo2Test {
	
	@Test def test() {
		"foo".assertEquals("foo")
	}
	
}

The context menu Run As -> JUnit Test is missing wenn right clicking on the foo package:

Reproduce the missing Run As → JUnit Test action by creating the two package-level Xtend test cases shown and right-clicking package foo in the Xtend IDE. Start at the package context-menu and JUnit launch handling; done means the action appears for the package and runs both test cases.