1 files changed, 42 insertions, 0 deletions
diff --git a/tools/lint/eslint/eslint-plugin-mozilla/tests/reject-chromeutils-import-null.js b/tools/lint/eslint/eslint-plugin-mozilla/tests/reject-chromeutils-import-null.js
new file mode 100644
index 0000000000..6584f728ac
--- /dev/null
+++ b/tools/lint/eslint/eslint-plugin-mozilla/tests/reject-chromeutils-import-null.js
@@ -0,0 +1,42 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// ------------------------------------------------------------------------------
+// Requirements
+// ------------------------------------------------------------------------------
+
+var rule = require("../lib/rules/reject-chromeutils-import-null");
+var RuleTester = require("eslint").RuleTester;
+
+const ruleTester = new RuleTester({ parserOptions: { ecmaVersion: 8 } });
+
+// ------------------------------------------------------------------------------
+// Tests
+// ------------------------------------------------------------------------------
+
+function invalidError() {
+  let message =
+    "ChromeUtils.import should not be called with (..., null) to " +
+    "retrieve the JSM global object. Rely on explicit exports instead.";
+  return [{ message, type: "CallExpression" }];
+}
+
+ruleTester.run("reject-chromeutils-import-null", rule, {
+  valid: ['ChromeUtils.import("resource://some/path/to/My.jsm")'],
+  invalid: [
+    {
+      code: 'ChromeUtils.import("resource://some/path/to/My.jsm", null)',
+      errors: invalidError(),
+    },
+    {
+      code: `
+ChromeUtils.import(
+  "resource://some/path/to/My.jsm",
+  null
+);`,
+      errors: invalidError(),
+    },
+  ],
+});