Added orx-olive test

orx-olive/src/main/kotlin/KtsObjectLoader.kt

@@ -0,0 +1,37 @@
+package org.openrndr.extra.olive
+
+import java.io.InputStream
+import java.io.Reader
+import javax.script.ScriptEngineManager
+
+class LoadException(message: String? = null, cause: Throwable? = null) : RuntimeException(message, cause)
+
+class KtsObjectLoader(classLoader: ClassLoader? = Thread.currentThread().contextClassLoader) {
+
+    val engine = ScriptEngineManager(classLoader).getEngineByExtension("kts")
+
+    init {
+        if (engine == null) {
+            throw RuntimeException("could not create scripting engine")
+        }
+    }
+
+    inline fun <R> safeEval(noinline evaluation: () -> R?) = try {
+        println(evaluation)
+        evaluation()
+    } catch (e: Exception) {
+        e.printStackTrace()
+        throw LoadException("Cannot load script", e)
+    }
+
+    inline fun <reified T> Any?.castOrError() = takeIf { it is T }?.let { it as T }
+        ?: throw IllegalArgumentException("Cannot cast $this to expected type ${T::class}")
+
+    inline fun <reified T> load(script: String): T = safeEval { engine.eval(script) }.castOrError()
+
+    inline fun <reified T> load(reader: Reader): T = safeEval { engine.eval(reader) }.castOrError()
+
+    inline fun <reified T> load(inputStream: InputStream): T = load(inputStream.reader())
+
+    inline fun <reified T> loadAll(vararg inputStream: InputStream): List<T> = inputStream.map(::load)
+}