1 files changed, 30 insertions, 0 deletions
diff --git a/storage/test/unit/test_telemetry_vfs.js b/storage/test/unit/test_telemetry_vfs.js
new file mode 100644
index 000000000..0822fe3e7
--- /dev/null
+++ b/storage/test/unit/test_telemetry_vfs.js
@@ -0,0 +1,30 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+// Make sure that there are telemetry entries created by sqlite io
+
+function run_sql(d, sql) {
+  var stmt = d.createStatement(sql);
+  stmt.execute();
+  stmt.finalize();
+}
+
+function new_file(name)
+{
+  var file = dirSvc.get("ProfD", Ci.nsIFile);
+  file.append(name);
+  return file;
+}
+function run_test()
+{
+  const Telemetry = Cc["@mozilla.org/base/telemetry;1"].getService(Ci.nsITelemetry);
+  let read_hgram = Telemetry.getHistogramById("MOZ_SQLITE_OTHER_READ_B");
+  let old_sum = read_hgram.snapshot().sum;
+  const file = new_file("telemetry.sqlite");
+  var d = getDatabase(file);
+  run_sql(d, "CREATE TABLE bloat(data varchar)");
+  run_sql(d, "DROP TABLE bloat");
+  do_check_true(read_hgram.snapshot().sum > old_sum);
+}
+