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package com.oracle.truffle.js.test.instrumentation;
import com.oracle.truffle.js.nodes.instrumentation.JSTags;
import org.junit.Test;
public class AwaitTest extends FineGrainedAccessTest {
@Test
public void testAwaitLiteral() {
String src = "(async function() { var x = await 42; return x + 1; })();";
evalWithTags(src, new Class[]{JSTags.ControlFlowBranchTag.class});
// First, execution is suspended. A promise is created and returned.
enter(JSTags.ControlFlowBranchTag.class, (e, b) -> {
assertAttribute(e, TYPE, JSTags.ControlFlowBranchTag.Type.Await.name());
b.input(42);
b.input(assertJSPromiseInput);
}).exitExceptional();
// When the promise resolves, the `await` node re-executes, and its return value is
// returned.
enter(JSTags.ControlFlowBranchTag.class, (e, b) -> {
assertAttribute(e, TYPE, JSTags.ControlFlowBranchTag.Type.Await.name());
b.input(42);
}).exit();
// We intercept another control-flow-event, which is _not_ await
enter(JSTags.ControlFlowBranchTag.class, (e, b) -> {
assertAttribute(e, TYPE, JSTags.ControlFlowBranchTag.Type.Return.name());
b.input(43);
}).exit();
}
@Test
public void testAwaitAsInput() {
String src = "(async () => { return await 42 + await 43; })();";
evalWithTags(src, new Class[]{JSTags.ControlFlowBranchTag.class, JSTags.BinaryOperationTag.class});
// return (suspend 1)
enter(JSTags.ControlFlowBranchTag.class, (e0, b0) -> {
assertAttribute(e0, TYPE, JSTags.ControlFlowBranchTag.Type.Return.name());
// await 42 (suspend)
enter(JSTags.ControlFlowBranchTag.class, (e, b) -> {
assertAttribute(e, TYPE, JSTags.ControlFlowBranchTag.Type.Await.name());
b.input(42);
b.input(assertJSPromiseInput);
}).exitExceptional();
}).exitExceptional();
// return (suspend 2)
enter(JSTags.ControlFlowBranchTag.class, (e0, b0) -> {
assertAttribute(e0, TYPE, JSTags.ControlFlowBranchTag.Type.Return.name());
// await 42
enter(JSTags.ControlFlowBranchTag.class, (e, b) -> {
assertAttribute(e, TYPE, JSTags.ControlFlowBranchTag.Type.Await.name());
b.input(42);
}).exit();
// await 43 (suspend)
enter(JSTags.ControlFlowBranchTag.class, (e1, b1) -> {
assertAttribute(e1, TYPE, JSTags.ControlFlowBranchTag.Type.Await.name());
b1.input(43);
b1.input(assertJSPromiseInput);
}).exitExceptional();
}).exitExceptional();
// return
enter(JSTags.ControlFlowBranchTag.class, (e0, b0) -> {
assertAttribute(e0, TYPE, JSTags.ControlFlowBranchTag.Type.Return.name());
// await 43
enter(JSTags.ControlFlowBranchTag.class, (e, b) -> {
assertAttribute(e, TYPE, JSTags.ControlFlowBranchTag.Type.Await.name());
b.input(43);
}).exit();
// await 42
enter(JSTags.BinaryOperationTag.class, (e1, b1) -> {
b1.input(42);
b1.input(43);
}).exit();
b0.input(85);
}).exit();
}
@Test
public void generatorWrapperAsInput() {
String src = "(async () => { let val = await 42;})();";
evalWithTags(src, new Class[]{JSTags.WriteVariableTag.class, JSTags.ControlFlowBranchTag.class});
// write (suspend)
enter(JSTags.WriteVariableTag.class, (e0, b0) -> {
assertAttribute(e0, NAME, "val");
// await (suspend)
enter(JSTags.ControlFlowBranchTag.class, (e, b) -> {
assertAttribute(e, TYPE, JSTags.ControlFlowBranchTag.Type.Await.name());
b.input(42);
b.input(assertJSPromiseInput);
}).exitExceptional();
}).exitExceptional();
// write
enter(JSTags.WriteVariableTag.class, (e0, b0) -> {
assertAttribute(e0, NAME, "val");
// await
enter(JSTags.ControlFlowBranchTag.class, (e, b) -> {
assertAttribute(e, TYPE, JSTags.ControlFlowBranchTag.Type.Await.name());
b.input(42);
}).exit();
b0.input(42);
}).exit();
}
}