1 files changed, 47 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/d8/d8-performance-measure-memory.js b/deps/v8/test/mjsunit/d8/d8-performance-measure-memory.js
new file mode 100644
index 0000000000..baf6479fff
--- /dev/null
+++ b/deps/v8/test/mjsunit/d8/d8-performance-measure-memory.js
@@ -0,0 +1,47 @@
+// Copyright 2019 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Test the performance.measureMemory() function of d8.  This test only makes
+// sense with d8.
+
+load('test/mjsunit/mjsunit.js');
+
+function assertLessThanOrEqual(a, b) {
+  assertTrue(a <= b, `Expected ${a} <= ${b}`);
+}
+
+function checkMeasureMemoryResult(result) {
+  assertTrue('total' in result);
+  assertTrue('jsMemoryEstimate' in result.total);
+  assertTrue('jsMemoryRange' in result.total);
+  assertEquals('number', typeof result.total.jsMemoryEstimate);
+  assertEquals(2, result.total.jsMemoryRange.length);
+  assertEquals('number', typeof result.total.jsMemoryRange[0]);
+  assertEquals('number', typeof result.total.jsMemoryRange[1]);
+  assertLessThanOrEqual(result.total.jsMemoryRange[0],
+                        result.total.jsMemoryRange[1]);
+  assertLessThanOrEqual(result.total.jsMemoryRange[0],
+                        result.total.jsMemoryEstimate);
+  assertLessThanOrEqual(result.total.jsMemoryEstimate,
+                        result.total.jsMemoryRange[1]);
+}
+
+if (this.performance && performance.measureMemory) {
+  assertPromiseResult((async () => {
+    let result = await performance.measureMemory();
+    checkMeasureMemoryResult(result);
+  })());
+
+  assertPromiseResult((async () => {
+    let result = await performance.measureMemory({detailed: false});
+    checkMeasureMemoryResult(result);
+  })());
+
+  assertPromiseResult((async () => {
+    let result = await performance.measureMemory({detailed: true});
+    // TODO(ulan): Also check the detailed results once measureMemory
+    // supports them.
+    checkMeasureMemoryResult(result);
+  })());
+}