1 files changed, 29 insertions, 0 deletions
diff --git a/testing/web-platform/tests/user-timing/clear_non_existent_measure.any.js b/testing/web-platform/tests/user-timing/clear_non_existent_measure.any.js
new file mode 100644
index 0000000000..9de0b5f266
--- /dev/null
+++ b/testing/web-platform/tests/user-timing/clear_non_existent_measure.any.js
@@ -0,0 +1,29 @@
+test(function()
+{
+    self.performance.mark("mark1");
+    self.performance.measure("measure1", "mark1");
+    self.performance.mark("mark2");
+    self.performance.measure("measure2", "mark2");
+
+    // test that two measures have been created
+    var entries = self.performance.getEntriesByType("measure");
+    assert_equals(entries.length, 2, "Two measures have been created for this test.");
+
+    // clear non-existent measure
+    self.performance.clearMeasures("measure3");
+
+    // test that "measure1" still exists
+    entries = self.performance.getEntriesByName("measure1");
+    assert_equals(entries[0].name, "measure1",
+              "After a call to self.performance.clearMeasures(\"measure3\"), where \"measure3" +
+              "\" is a non-existent measure, self.performance.getEntriesByName(\"measure1\") " +
+              "returns an object containing the \"measure1\" measure.");
+
+    // test that "measure2" still exists
+    entries = self.performance.getEntriesByName("measure2");
+    assert_equals(entries[0].name, "measure2",
+              "After a call to self.performance.clearMeasures(\"measure3\"), where \"measure3" +
+              "\" is a non-existent measure, self.performance.getEntriesByName(\"measure2\") " +
+              "returns an object containing the \"measure2\" measure.");
+
+}, "Clearing a non-existent measure doesn't affect existing measures");