1 files changed, 57 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Debugger-shouldAvoidSideEffects.js b/js/src/jit-test/tests/debug/Debugger-shouldAvoidSideEffects.js
new file mode 100644
index 0000000000..62d6693d4e
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Debugger-shouldAvoidSideEffects.js
@@ -0,0 +1,57 @@
+// Test shouldAvoidSideEffects flag.
+
+const g = newGlobal({newCompartment: true});
+const dbg = Debugger(g);
+const gdbg = dbg.addDebuggee(g);
+
+gdbg.executeInGlobal(`
+var obj, result, reachedNextLine;
+`);
+
+dbg.shouldAvoidSideEffects = false;
+assertEq(dbg.shouldAvoidSideEffects, false);
+
+let result = gdbg.executeInGlobal(`
+result = undefined;
+reachedNextLine = false;
+
+obj = createSideEffectfulResolveObject();
+result = obj.test;
+reachedNextLine = true;
+"finished";
+`);
+assertEq(g.result, 42);
+assertEq(g.reachedNextLine, true);
+assertEq(result.return, "finished");
+
+dbg.shouldAvoidSideEffects = true;
+assertEq(dbg.shouldAvoidSideEffects, true);
+
+result = gdbg.executeInGlobal(`
+result = undefined;
+reachedNextLine = false;
+
+obj = createSideEffectfulResolveObject();
+result = obj.test;
+reachedNextLine = true;
+"finished";
+`);
+assertEq(g.result, undefined);
+assertEq(g.reachedNextLine, false);
+assertEq(result, null);
+
+// Resolve after abort.
+dbg.shouldAvoidSideEffects = false;
+assertEq(dbg.shouldAvoidSideEffects, false);
+
+result = gdbg.executeInGlobal(`
+result = undefined;
+reachedNextLine = false;
+
+result = obj.test;
+reachedNextLine = true;
+"finished";
+`);
+assertEq(g.result, 42);
+assertEq(g.reachedNextLine, true);
+assertEq(result.return, "finished");