1 files changed, 44 insertions, 0 deletions
diff --git a/js/src/tests/non262/class/newTargetArgumentsIntact.js b/js/src/tests/non262/class/newTargetArgumentsIntact.js
new file mode 100644
index 0000000000..d047085ea0
--- /dev/null
+++ b/js/src/tests/non262/class/newTargetArgumentsIntact.js
@@ -0,0 +1,44 @@
+// Since we put new.target at the end of the arguments vector, ensrue that it
+// doesn't interact with the arguments object
+
+var argsContent;
+
+function argsWithNewTarget(foo) {
+    assertEq(arguments.length, argsContent.length);
+    for (let i = 0; i < arguments.length; i++)
+        assertEq(arguments[i], argsContent[i]);
+    let nt = new.target;
+
+    // Assigning to the arguments object shouldn't infect new.target, either
+    arguments[arguments.length] = 42;
+    assertEq(new.target, nt);
+}
+
+// Test constructing invocations, with under and overflow
+argsContent = [];
+for (let i = 0; i < 100; i++)
+    new argsWithNewTarget();
+
+argsContent = [1];
+for (let i = 0; i < 100; i++)
+    new argsWithNewTarget(1);
+
+argsContent = [1,2,3];
+for (let i = 0; i < 100; i++)
+    new argsWithNewTarget(1, 2, 3);
+
+// Test spreadnew as well.
+argsContent = [];
+for (let i = 0; i < 100; i++)
+    new argsWithNewTarget(...[]);
+
+argsContent = [1];
+for (let i = 0; i < 100; i++)
+    new argsWithNewTarget(...[1]);
+
+argsContent = [1,2,3];
+for (let i = 0; i < 100; i++)
+    new argsWithNewTarget(...[1,2,3]);
+
+if (typeof reportCompare === "function")
+    reportCompare(0,0,"OK");