Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 58 insertions, 0 deletions

diff --git a/js/src/tests/non262/Array/pop-no-has-trap.js b/js/src/tests/non262/Array/pop-no-has-trap.js
new file mode 100644
index 0000000000..11bb93ddd0
--- /dev/null
+++ b/js/src/tests/non262/Array/pop-no-has-trap.js
@@ -0,0 +1,58 @@
+// Test that Array.prototype.pop doesn't call the [[HasProperty]] internal
+// method of objects when retrieving the element at the last index.
+
+var log = [];
+var array = [];
+var proxy = new Proxy(array, new Proxy({}, {
+    get(t, trap, r) {
+      return (t, pk, ...more) => {
+        log.push(`${trap}:${String(pk)}`);
+        return Reflect[trap](t, pk, ...more);
+      };
+    }
+}));
+
+var result;
+
+result = Array.prototype.pop.call(proxy);
+assertEqArray(log, [
+  "get:length",
+  "set:length", "getOwnPropertyDescriptor:length", "defineProperty:length"
+]);
+assertEq(result, undefined);
+
+log.length = 0;
+array.push(1);
+
+result = Array.prototype.pop.call(proxy);
+assertEqArray(log, [
+  "get:length",
+  "get:0", "deleteProperty:0",
+  "set:length", "getOwnPropertyDescriptor:length", "defineProperty:length"
+]);
+assertEq(result, 1);
+
+log.length = 0;
+array.push(2, 3);
+
+result = Array.prototype.pop.call(proxy);
+assertEqArray(log, [
+  "get:length",
+  "get:1", "deleteProperty:1",
+  "set:length", "getOwnPropertyDescriptor:length", "defineProperty:length"
+]);
+assertEq(result, 3);
+
+log.length = 0;
+array.push(4, 5);
+
+result = Array.prototype.pop.call(proxy);
+assertEqArray(log, [
+  "get:length",
+  "get:2", "deleteProperty:2",
+  "set:length", "getOwnPropertyDescriptor:length", "defineProperty:length"
+]);
+assertEq(result, 5);
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);