1 files changed, 14 insertions, 0 deletions
diff --git a/toolkit/components/telemetry/tests/unit/test_TelemetryFlagClear.js b/toolkit/components/telemetry/tests/unit/test_TelemetryFlagClear.js
new file mode 100644
index 000000000..712aceb3b
--- /dev/null
+++ b/toolkit/components/telemetry/tests/unit/test_TelemetryFlagClear.js
@@ -0,0 +1,14 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function run_test()
+{
+  let testFlag = Services.telemetry.getHistogramById("TELEMETRY_TEST_FLAG");
+  equal(JSON.stringify(testFlag.snapshot().counts), "[1,0,0]", "Original value is correct");
+  testFlag.add(1);
+  equal(JSON.stringify(testFlag.snapshot().counts), "[0,1,0]", "Value is correct after ping.");
+  testFlag.clear();
+  equal(JSON.stringify(testFlag.snapshot().counts), "[1,0,0]", "Value is correct after calling clear()");
+  testFlag.add(1);
+  equal(JSON.stringify(testFlag.snapshot().counts), "[0,1,0]", "Value is correct after ping.");
+}