Add tests

tests/src/test/java/org/mozilla/javascript/tests/InterpreterFunctionPeelingTest.java

@@ -0,0 +1,65 @@
+package org.mozilla.javascript.tests;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.mozilla.javascript.Context;
+import org.mozilla.javascript.ContinuationPending;
+import org.mozilla.javascript.Script;
+import org.mozilla.javascript.Scriptable;
+
+// Tests that continuations work across arrow function, bound function, and apply/call invocations.
+public class InterpreterFunctionPeelingTest {
+    public static final Runnable CAPTURER = () -> {
+        try (var cx = Context.enter()) {
+            throw cx.captureContinuation();
+        }
+    };
+
+    public static void executeScript(String script) {
+        try (var cx = Context.enter()) {
+            cx.setOptimizationLevel(-1);
+            Script s = cx.compileString(script, "unknown source", 0, null);
+            Scriptable scope = cx.initStandardObjects();
+            scope.put("c", scope, Context.javaToJS(CAPTURER, scope));
+            Assert.assertThrows(ContinuationPending.class, () -> {
+                cx.executeScriptWithContinuations(s, scope);
+            });
+        }
+    }
+
+    @Test public void testBind() {
+        executeScript("function capture(){c.run()};capture.bind(this)()");
+    }
+
+    @Test public void testBindCall() {
+        executeScript("function capture(){c.run()};capture.bind(this).call()");
+    }
+
+    @Test public void testBindApply() {
+        executeScript("function capture(){c.run()};capture.bind(this).apply()");
+    }
+
+    @Test public void testArrow() {
+        executeScript("capture=()=>{c.run()};capture()");
+    }
+
+    @Test public void testArrowCall() {
+        executeScript("capture=()=>{c.run()};capture.call()");
+    }
+
+    @Test public void testArrowApply() {
+        executeScript("capture=()=>{c.run()};capture.apply()");
+    }
+
+    @Test public void testArrowBindCall() {
+        executeScript("capture=()=>{c.run()};capture.bind(this).call()");
+    }
+
+    @Test public void testArrowBindApply() {
+        executeScript("capture=()=>{c.run()};capture.bind(this).apply()");
+    }
+
+    @Test public void testArrowImmediate() {
+        executeScript("(()=>{c.run()})()");
+    }
+}