1 files changed, 100 insertions, 0 deletions
diff --git a/tools/lint/eslint/eslint-plugin-mozilla/tests/balanced-listeners.js b/tools/lint/eslint/eslint-plugin-mozilla/tests/balanced-listeners.js
new file mode 100644
index 0000000000..b7cd4e2c2f
--- /dev/null
+++ b/tools/lint/eslint/eslint-plugin-mozilla/tests/balanced-listeners.js
@@ -0,0 +1,100 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// ------------------------------------------------------------------------------
+// Requirements
+// ------------------------------------------------------------------------------
+
+var rule = require("../lib/rules/balanced-listeners");
+var RuleTester = require("eslint").RuleTester;
+
+const ruleTester = new RuleTester({ parserOptions: { ecmaVersion: "latest" } });
+
+// ------------------------------------------------------------------------------
+// Tests
+// ------------------------------------------------------------------------------
+
+function error(code, functionName, type) {
+  return {
+    code,
+    errors: [
+      {
+        messageId: "noCorresponding",
+        type: "Identifier",
+        data: { functionName, type },
+      },
+    ],
+  };
+}
+
+ruleTester.run("balanced-listeners", rule, {
+  valid: [
+    "elt.addEventListener('event', handler);" +
+      "elt.removeEventListener('event', handler);",
+
+    "elt.addEventListener('event', handler, true);" +
+      "elt.removeEventListener('event', handler, true);",
+
+    "elt.addEventListener('event', handler, false);" +
+      "elt.removeEventListener('event', handler, false);",
+
+    "elt.addEventListener('event', handler);" +
+      "elt.removeEventListener('event', handler, false);",
+
+    "elt.addEventListener('event', handler, false);" +
+      "elt.removeEventListener('event', handler);",
+
+    "elt.addEventListener('event', handler, {capture: false});" +
+      "elt.removeEventListener('event', handler);",
+
+    "elt.addEventListener('event', handler);" +
+      "elt.removeEventListener('event', handler, {capture: false});",
+
+    "elt.addEventListener('event', handler, {capture: true});" +
+      "elt.removeEventListener('event', handler, true);",
+
+    "elt.addEventListener('event', handler, true);" +
+      "elt.removeEventListener('event', handler, {capture: true});",
+
+    "elt.addEventListener('event', handler, {once: true});",
+
+    "elt.addEventListener('event', handler, {once: true, capture: true});",
+  ],
+  invalid: [
+    error(
+      "elt.addEventListener('click', handler, false);",
+      "removeEventListener",
+      "click"
+    ),
+
+    error(
+      "elt.addEventListener('click', handler, false);" +
+        "elt.removeEventListener('click', handler, true);",
+      "removeEventListener",
+      "click"
+    ),
+
+    error(
+      "elt.addEventListener('click', handler, {capture: false});" +
+        "elt.removeEventListener('click', handler, true);",
+      "removeEventListener",
+      "click"
+    ),
+
+    error(
+      "elt.addEventListener('click', handler, {capture: true});" +
+        "elt.removeEventListener('click', handler);",
+      "removeEventListener",
+      "click"
+    ),
+
+    error(
+      "elt.addEventListener('click', handler, true);" +
+        "elt.removeEventListener('click', handler);",
+      "removeEventListener",
+      "click"
+    ),
+  ],
+});