1 files changed, 37 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/shape-snapshots.js b/js/src/jit-test/tests/basic/shape-snapshots.js
new file mode 100644
index 0000000000..866298caeb
--- /dev/null
+++ b/js/src/jit-test/tests/basic/shape-snapshots.js
@@ -0,0 +1,37 @@
+function test1() {
+    var o = {x: 1, y: 2};
+    var snapshot = createShapeSnapshot(o);
+    checkShapeSnapshot(snapshot);
+    Object.defineProperty(o, "z", {get: function() {}});
+    checkShapeSnapshot(snapshot);
+
+    snapshot = createShapeSnapshot(o);
+    checkShapeSnapshot(snapshot);
+    o[12345678] = 1;
+    checkShapeSnapshot(snapshot);
+
+    snapshot = createShapeSnapshot(o);
+    Object.defineProperty(o, "a", {configurable: true, set: function(){}});
+    checkShapeSnapshot(snapshot);
+
+    snapshot = createShapeSnapshot(o);
+    checkShapeSnapshot(snapshot);
+    delete o.a;
+    checkShapeSnapshot(snapshot);
+}
+test1();
+
+function test2() {
+    var dictObject = {x: 1, y: 2, z: 3};
+    delete dictObject.x;
+    var objects = [this, {}, {x: 1}, {x: 2}, dictObject, function() {}, [1, 2],
+                   Object.prototype, new Proxy({}, {})];
+    var snapshots = objects.map(o => createShapeSnapshot(o));
+    gc();
+    snapshots.forEach(function(snapshot) {
+        objects.forEach(function(obj) {
+            checkShapeSnapshot(snapshot, obj);
+        });
+    });
+}
+test2();