1 files changed, 19 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/isError.js b/js/src/jit-test/tests/debug/isError.js
new file mode 100644
index 0000000000..253d2c76d4
--- /dev/null
+++ b/js/src/jit-test/tests/debug/isError.js
@@ -0,0 +1,19 @@
+let g = newGlobal({newCompartment: true});
+let dbg = new Debugger();
+let gw = dbg.addDebuggee(g);
+
+g.error1 = new Error()
+g.error2 = new g.Error()
+g.error3 = new g.TypeError();
+
+let error1DO = gw.getOwnPropertyDescriptor('error1').value;
+let error2DO = gw.getOwnPropertyDescriptor('error2').value;
+let error3DO = gw.getOwnPropertyDescriptor('error3').value;
+
+assertEq(error1DO.isError, true);
+assertEq(error2DO.isError, true);
+assertEq(error3DO.isError, true);
+
+g.nonError = new Array();
+let nonErrorDO = gw.getOwnPropertyDescriptor('nonError').value;
+assertEq(nonErrorDO.isError, false);