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package com.oracle.truffle.sl.test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import org.graalvm.polyglot.Context;
import org.graalvm.polyglot.PolyglotAccess;
import org.graalvm.polyglot.Value;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import com.oracle.truffle.api.TruffleLanguage;
import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.interop.TruffleObject;
import com.oracle.truffle.api.library.ExportLibrary;
import com.oracle.truffle.api.library.ExportMessage;
public class PassItselfBackViaContextTest {
private Context context;
private MyObj myObj;
private Value myObjWrapped;
private CallWithValue myObjCall;
@Test
public void callbackWithParamTen() {
myObjWrapped.execute(10);
assertEquals("Assigned to ten", 10, myObj.value);
}
@Test
public void callbackWithParamTruffleObject() {
myObjWrapped.execute(myObjWrapped);
assertEquals("Assigned to itself", myObj, myObj.value);
}
@Test
public void callbackWithValueTen() {
myObjCall.call(10);
assertEquals("Assigned to ten", 10, myObj.value);
}
@Test
public void callbackWithValueTruffleObject() {
myObjCall.call(myObjWrapped);
assertEquals("Assigned to itself", myObj, myObj.value);
}
@Before
public void prepareSystem() {
myObj = new MyObj();
context = Context.newBuilder().allowPolyglotAccess(PolyglotAccess.ALL).build();
context.getPolyglotBindings().putMember("myObj", myObj);
context.eval("sl", "function main() {\n" + " return import(\"myObj\");\n" + "}\n");
myObjWrapped = context.getBindings("sl").getMember("main").execute();
assertFalse(myObjWrapped.isNull());
myObjCall = myObjWrapped.as(CallWithValue.class);
}
@After
public void disposeSystem() {
context.close();
}
@ExportLibrary(InteropLibrary.class)
static final class MyObj implements TruffleObject {
private Object value;
@ExportMessage
Object execute(Object[] arguments) {
value = arguments[0];
return "";
}
@SuppressWarnings("static-method")
@ExportMessage
boolean isExecutable() {
return true;
}
}
abstract static class MyLang extends TruffleLanguage<Object> {
}
@FunctionalInterface
interface CallWithValue {
void call(Object value);
}
}