1 files changed, 81 insertions, 0 deletions
diff --git a/tools/lint/eslint/eslint-plugin-mozilla/tests/use-chromeutils-generateqi.js b/tools/lint/eslint/eslint-plugin-mozilla/tests/use-chromeutils-generateqi.js
new file mode 100644
index 0000000000..26c6b350bc
--- /dev/null
+++ b/tools/lint/eslint/eslint-plugin-mozilla/tests/use-chromeutils-generateqi.js
@@ -0,0 +1,81 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// ------------------------------------------------------------------------------
+// Requirements
+// ------------------------------------------------------------------------------
+
+var rule = require("../lib/rules/use-chromeutils-generateqi");
+var RuleTester = require("eslint").RuleTester;
+
+const ruleTester = new RuleTester({ parserOptions: { ecmaVersion: 6 } });
+
+// ------------------------------------------------------------------------------
+// Tests
+// ------------------------------------------------------------------------------
+
+function callError(message) {
+  return [{ message, type: "CallExpression" }];
+}
+function error(message, type) {
+  return [{ message, type }];
+}
+
+const MSG_NO_JS_QUERY_INTERFACE =
+  "Please use ChromeUtils.generateQI rather than manually creating " +
+  "JavaScript QueryInterface functions";
+
+const MSG_NO_XPCOMUTILS_GENERATEQI =
+  "Please use ChromeUtils.generateQI instead of XPCOMUtils.generateQI";
+
+/* globals nsIFlug */
+function QueryInterface(iid) {
+  if (
+    iid.equals(Ci.nsISupports) ||
+    iid.equals(Ci.nsIMeh) ||
+    iid.equals(nsIFlug) ||
+    iid.equals(Ci.amIFoo)
+  ) {
+    return this;
+  }
+  throw Components.Exception("", Cr.NS_ERROR_NO_INTERFACE);
+}
+
+ruleTester.run("use-chromeutils-generateqi", rule, {
+  valid: [
+    `X.prototype.QueryInterface = ChromeUtils.generateQI(["nsIMeh"]);`,
+    `X.prototype = { QueryInterface: ChromeUtils.generateQI(["nsIMeh"]) }`,
+  ],
+  invalid: [
+    {
+      code: `X.prototype.QueryInterface = XPCOMUtils.generateQI(["nsIMeh"]);`,
+      output: `X.prototype.QueryInterface = ChromeUtils.generateQI(["nsIMeh"]);`,
+      errors: callError(MSG_NO_XPCOMUTILS_GENERATEQI),
+    },
+    {
+      code: `X.prototype = { QueryInterface: XPCOMUtils.generateQI(["nsIMeh"]) };`,
+      output: `X.prototype = { QueryInterface: ChromeUtils.generateQI(["nsIMeh"]) };`,
+      errors: callError(MSG_NO_XPCOMUTILS_GENERATEQI),
+    },
+    {
+      code: `X.prototype = { QueryInterface: ${QueryInterface} };`,
+      output: `X.prototype = { QueryInterface: ChromeUtils.generateQI(["nsIMeh", "nsIFlug", "amIFoo"]) };`,
+      errors: error(MSG_NO_JS_QUERY_INTERFACE, "Property"),
+    },
+    {
+      code: `X.prototype = { ${String(QueryInterface).replace(
+        /^function /,
+        ""
+      )} };`,
+      output: `X.prototype = { QueryInterface: ChromeUtils.generateQI(["nsIMeh", "nsIFlug", "amIFoo"]) };`,
+      errors: error(MSG_NO_JS_QUERY_INTERFACE, "Property"),
+    },
+    {
+      code: `X.prototype.QueryInterface = ${QueryInterface};`,
+      output: `X.prototype.QueryInterface = ChromeUtils.generateQI(["nsIMeh", "nsIFlug", "amIFoo"]);`,
+      errors: error(MSG_NO_JS_QUERY_INTERFACE, "AssignmentExpression"),
+    },
+  ],
+});