Libraries written in Kotlin are factored out into a separate project

libraries/testlib/test/StringUtilTest.kt

@@ -0,0 +1,16 @@
+package test.string
+
+import kotlin.*
+import kotlin.test.*
+import kotlin.util.*
+
+import junit.framework.*
+
+class StringUtilTest() : TestCase() {
+
+    fun testToRegex() {
+        val re = """foo""".toRegex()
+        val list = re.split("hellofoobar").filterNulls()
+        assertEquals(arrayList("hello", "bar"), list)
+    }
+}