1 files changed, 93 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/cacheir/setgname-let.js b/js/src/jit-test/tests/cacheir/setgname-let.js
new file mode 100644
index 0000000000..92345fb0df
--- /dev/null
+++ b/js/src/jit-test/tests/cacheir/setgname-let.js
@@ -0,0 +1,93 @@
+let x = 2;
+
+function simple() {
+  for (var i = 0; i < 10; i++) {
+    x = i;
+    assertEq(x, i);
+  }
+}
+
+function setname() {
+  function set(obj, v) {
+    with (obj) {
+      x = v;
+    }
+  }
+
+  set({}, 100)
+  assertEq(x, 100);
+  set({x: 1}, 0);
+  assertEq(x, 100);
+  set({__proto__: {x: 1}}, 13);
+  assertEq(x, 100);
+}
+
+
+function noshadow() {
+  for (var i = 0; i < 20; i++) {
+    x = i;
+    assertEq(x, i);
+
+    if (i == 10) {
+      globalThis.x = "haha";
+      assertEq(x, 10);
+    }
+  }
+}
+
+function uninitialized() {
+  for (var i = 0; i < 20; i++) {
+    var threw = false;
+    try {
+      undef = 2;
+    } catch {
+      threw = true;
+    }
+    assertEq(threw, true);
+  }
+}
+
+function simpleStrict() {
+  "use strict";
+  for (var i = 0; i < 10; i++) {
+    x = i;
+    assertEq(x, i);
+  }
+}
+
+// No with in strict!
+
+function noshadowStrict() {
+  "use strict";
+  for (var i = 0; i < 20; i++) {
+    x = i;
+    assertEq(x, i);
+
+    if (i == 10) {
+      globalThis.x = "haha";
+      assertEq(x, 10);
+    }
+  }
+}
+
+function uninitializedStrict() {
+  for (var i = 0; i < 20; i++) {
+    var threw = false;
+    try {
+      undef = 2;
+    } catch {
+      threw = true;
+    }
+    assertEq(threw, true);
+  }
+}
+
+simple();
+setname();
+noshadow();
+uninitialized();
+simpleStrict();
+noshadowStrict();
+uninitializedStrict();
+
+let undef = 42;