1 files changed, 23 insertions, 0 deletions
diff --git a/browser/components/attribution/test/browser/head.js b/browser/components/attribution/test/browser/head.js
new file mode 100644
index 0000000000..78e233e9f8
--- /dev/null
+++ b/browser/components/attribution/test/browser/head.js
@@ -0,0 +1,23 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+"use strict";
+
+const { AttributionCode } = ChromeUtils.import(
+  "resource:///modules/AttributionCode.jsm"
+);
+
+// Keep in sync with `BROWSER_ATTRIBUTION_ERRORS` in Histograms.json.
+const INDEX_READ_ERROR = 0;
+const INDEX_DECODE_ERROR = 1;
+const INDEX_WRITE_ERROR = 2;
+const INDEX_QUARANTINE_ERROR = 3;
+
+add_setup(function() {
+  // AttributionCode._clearCache is only possible in a testing environment
+  Services.env.set("XPCSHELL_TEST_PROFILE_DIR", "testing");
+
+  registerCleanupFunction(() => {
+    Services.env.set("XPCSHELL_TEST_PROFILE_DIR", null);
+  });
+});