1 files changed, 74 insertions, 0 deletions
diff --git a/comm/calendar/test/.eslintrc.js b/comm/calendar/test/.eslintrc.js
new file mode 100644
index 0000000000..fc89c84bb1
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+++ b/comm/calendar/test/.eslintrc.js
@@ -0,0 +1,74 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+// Calendar tests run with the pref calendar.timezone.local set to UTC. This
+// works fine on the CI, where the system clock is also UTC, but on developers'
+// machines the time difference causes some problems. If you have to use the
+// Date object, make sure that you use UTC methods.
+
+module.exports = {
+  rules: {
+    "no-restricted-properties": [
+      "error",
+      {
+        property: "getFullYear",
+        message: "These tests run in UTC. Use 'getUTCFullYear' instead.",
+      },
+      {
+        property: "getMonth",
+        message: "These tests run in UTC. Use 'getUTCMonth' instead.",
+      },
+      {
+        property: "getDay",
+        message: "These tests run in UTC. Use 'getUTCDay' instead.",
+      },
+      {
+        property: "getDate",
+        message: "These tests run in UTC. Use 'getUTCDate' instead.",
+      },
+      {
+        property: "getHours",
+        message: "These tests run in UTC. Use 'getUTCHours' instead.",
+      },
+      {
+        property: "getMinutes",
+        message: "These tests run in UTC. Use 'getUTCMinutes' instead.",
+      },
+      {
+        property: "setFullYear",
+        message: "These tests run in UTC. Use 'setUTCFullYear' instead.",
+      },
+      {
+        property: "setMonth",
+        message: "These tests run in UTC. Use 'setUTCMonth' instead.",
+      },
+      {
+        property: "setDay",
+        message: "These tests run in UTC. Use 'setUTCDay' instead.",
+      },
+      {
+        property: "setDate",
+        message: "These tests run in UTC. Use 'setUTCDate' instead.",
+      },
+      {
+        property: "setHours",
+        message: "These tests run in UTC. Use 'setUTCHours' instead.",
+      },
+      {
+        property: "setMinutes",
+        message: "These tests run in UTC. Use 'setUTCMinutes' instead.",
+      },
+    ],
+    "no-restricted-syntax": [
+      "error",
+      {
+        selector: "[callee.name='Date'][arguments.length>=2]",
+        message:
+          "These tests run in UTC. Use 'new Date(Date.UTC(...))' to construct a Date with arguments.",
+      },
+    ],
+  },
+};