1 files changed, 84 insertions, 0 deletions
diff --git a/toolkit/components/nimbus/test/browser/browser_remotesettingsexperimentloader_init.js b/toolkit/components/nimbus/test/browser/browser_remotesettingsexperimentloader_init.js
new file mode 100644
index 0000000000..f80fb7dfa5
--- /dev/null
+++ b/toolkit/components/nimbus/test/browser/browser_remotesettingsexperimentloader_init.js
@@ -0,0 +1,84 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const { ExperimentFakes } = ChromeUtils.importESModule(
+  "resource://testing-common/NimbusTestUtils.sys.mjs"
+);
+const { ExperimentManager } = ChromeUtils.importESModule(
+  "resource://nimbus/lib/ExperimentManager.sys.mjs"
+);
+const { ExperimentAPI } = ChromeUtils.importESModule(
+  "resource://nimbus/ExperimentAPI.sys.mjs"
+);
+
+function getRecipe(slug) {
+  return ExperimentFakes.recipe(slug, {
+    bucketConfig: {
+      start: 0,
+      // Make sure the experiment enrolls
+      count: 10000,
+      total: 10000,
+      namespace: "mochitest",
+      randomizationUnit: "normandy_id",
+    },
+    targeting: "!(experiment.slug in activeExperiments)",
+  });
+}
+
+add_task(async function test_double_feature_enrollment() {
+  let sandbox = sinon.createSandbox();
+  let sendFailureTelemetryStub = sandbox.stub(
+    ExperimentManager,
+    "sendFailureTelemetry"
+  );
+  await ExperimentAPI.ready();
+
+  Assert.ok(
+    ExperimentManager.store.getAllActiveExperiments().length === 0,
+    "Clean state"
+  );
+
+  let recipe1 = getRecipe("foo" + Math.random());
+  let recipe2 = getRecipe("foo" + Math.random());
+
+  let enrollPromise1 = ExperimentFakes.waitForExperimentUpdate(
+    ExperimentAPI,
+    recipe1.slug
+  );
+
+  ExperimentManager.enroll(recipe1, "test_double_feature_enrollment");
+  await enrollPromise1;
+  ExperimentManager.enroll(recipe2, "test_double_feature_enrollment");
+
+  Assert.equal(
+    ExperimentManager.store.getAllActiveExperiments().length,
+    1,
+    "1 active experiment"
+  );
+
+  await BrowserTestUtils.waitForCondition(
+    () => sendFailureTelemetryStub.callCount === 1,
+    "Expected to fail one of the recipes"
+  );
+
+  Assert.equal(
+    sendFailureTelemetryStub.firstCall.args[0],
+    "enrollFailed",
+    "Check expected event"
+  );
+  Assert.ok(
+    sendFailureTelemetryStub.firstCall.args[1] === recipe1.slug ||
+      sendFailureTelemetryStub.firstCall.args[1] === recipe2.slug,
+    "Failed one of the two recipes"
+  );
+  Assert.equal(
+    sendFailureTelemetryStub.firstCall.args[2],
+    "feature-conflict",
+    "Check expected reason"
+  );
+
+  await ExperimentFakes.cleanupAll([recipe1.slug]);
+  sandbox.restore();
+});