1 files changed, 81 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Debugger-adoptFrame.js b/js/src/jit-test/tests/debug/Debugger-adoptFrame.js
new file mode 100644
index 0000000000..f5a911fe6c
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Debugger-adoptFrame.js
@@ -0,0 +1,81 @@
+// validate the common behavior of of Debugger.adoptFrame
+
+load(libdir + "asserts.js");
+
+const g = newGlobal({ newCompartment: true });
+
+const dbg1 = new Debugger();
+const gDO1 = dbg1.addDebuggee(g);
+
+let suspendedFrame;
+dbg1.onDebuggerStatement = function() {
+  // Test working with an onStack frame.
+  const frame1 = dbg1.getNewestFrame();
+
+  const dbg = new Debugger();
+  assertErrorMessage(
+    () => dbg.adoptFrame(frame1),
+    Error,
+    "Debugger.Frame's global is not a debuggee"
+  );
+
+  dbg.addDebuggee(g);
+
+  const frame2 = dbg.adoptFrame(frame1);
+
+  assertMatchingFrame(frame1, frame2);
+
+  suspendedFrame = frame1;
+};
+const generator = g.eval(`
+function* fn() {
+  debugger;
+  yield;
+}
+fn();
+`);
+generator.next();
+
+(function() {
+  // Test working with a suspended generator frame.
+  const dbg = new Debugger();
+  assertErrorMessage(
+    () => dbg.adoptFrame(suspendedFrame),
+    Error,
+    "Debugger.Frame's global is not a debuggee"
+  );
+
+  dbg.addDebuggee(g);
+
+  const frame2 = dbg.adoptFrame(suspendedFrame);
+
+  assertMatchingFrame(frame2, suspendedFrame);
+})();
+
+generator.next();
+const deadFrame = suspendedFrame;
+
+(function() {
+  // Test working with a dead frame.
+  const dbg = new Debugger();
+
+  // This doesn't throw because the dead frame doesn't have any
+  // debuggee-specific data associated with it anymore.
+  dbg.adoptFrame(deadFrame);
+
+  dbg.addDebuggee(g);
+
+  const frame2 = dbg.adoptFrame(deadFrame);
+
+  assertMatchingFrame(frame2, deadFrame);
+})();
+
+function assertMatchingFrame(frame1, frame2) {
+  assertEq(frame2.onStack, frame1.onStack);
+  assertEq(frame2.terminated, frame1.terminated);
+
+  if (!frame2.terminated) {
+    assertEq(frame2.type, frame1.type);
+    assertEq(frame2.offset, frame1.offset);
+  }
+}