1 files changed, 43 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/cacheir/set-size.js b/js/src/jit-test/tests/cacheir/set-size.js
new file mode 100644
index 0000000000..894ed83be7
--- /dev/null
+++ b/js/src/jit-test/tests/cacheir/set-size.js
@@ -0,0 +1,43 @@
+function testEmpty() {
+  let set = new Set();
+  for (let i = 0; i < 100; ++i) {
+    assertEq(set.size, 0);
+  }
+}
+for (let i = 0; i < 2; ++i) testEmpty();
+
+function testSimple() {
+  let set = new Set([1, 2, 3, 4]);
+  for (let i = 0; i < 100; ++i) {
+    assertEq(set.size, 4);
+  }
+}
+for (let i = 0; i < 2; ++i) testSimple();
+
+function testWithDelete() {
+  for (let i = 0; i < 100; ++i) {
+    let a = [1, 2, 3, 4];
+    let set = new Set(a);
+    for (let j = 0; j < a.length; ++j) {
+      assertEq(set.size, a.length - j);
+      set.delete(a[j]);
+      assertEq(set.size, a.length - j - 1);
+    }
+    assertEq(set.size, 0);
+  }
+}
+for (let i = 0; i < 2; ++i) testWithDelete();
+
+function testWithAdd() {
+  for (let i = 0; i < 100; ++i) {
+    let a = [1, 2, 3, 4];
+    let set = new Set();
+    for (let j = 0; j < a.length; ++j) {
+      assertEq(set.size, j);
+      set.add(a[j]);
+      assertEq(set.size, j + 1);
+    }
+    assertEq(set.size, a.length);
+  }
+}
+for (let i = 0; i < 2; ++i) testWithAdd();