1 files changed, 72 insertions, 0 deletions
diff --git a/tools/lint/eslint/eslint-plugin-mozilla/tests/prefer-formatValues.js b/tools/lint/eslint/eslint-plugin-mozilla/tests/prefer-formatValues.js
new file mode 100644
index 0000000000..0883130f17
--- /dev/null
+++ b/tools/lint/eslint/eslint-plugin-mozilla/tests/prefer-formatValues.js
@@ -0,0 +1,72 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// ------------------------------------------------------------------------------
+// Requirements
+// ------------------------------------------------------------------------------
+
+var rule = require("../lib/rules/prefer-formatValues");
+var RuleTester = require("eslint").RuleTester;
+
+const ruleTester = new RuleTester({ parserOptions: { ecmaVersion: 6 } });
+
+// ------------------------------------------------------------------------------
+// Tests
+// ------------------------------------------------------------------------------
+
+function error(line, column = undefined) {
+  return {
+    message:
+      "prefer to use a single document.l10n.formatValues call instead " +
+      "of multiple calls to document.l10n.formatValue or document.l10n.formatValues",
+    type: "CallExpression",
+    line,
+    column,
+  };
+}
+
+ruleTester.run("check-length", rule, {
+  valid: [
+    "document.l10n.formatValue('foobar');",
+    "document.l10n.formatValues(['foobar', 'foobaz']);",
+    `if (foo) {
+       document.l10n.formatValue('foobar');
+     } else {
+       document.l10n.formatValue('foobaz');
+     }`,
+    `document.l10n.formatValue('foobaz');
+     if (foo) {
+       document.l10n.formatValue('foobar');
+     }`,
+    `if (foo) {
+       document.l10n.formatValue('foobar');
+     }
+     document.l10n.formatValue('foobaz');`,
+    `if (foo) {
+       document.l10n.formatValue('foobar');
+     }
+     document.l10n.formatValues(['foobaz']);`,
+  ],
+  invalid: [
+    {
+      code: `document.l10n.formatValue('foobar');
+             document.l10n.formatValue('foobaz');`,
+      errors: [error(1, 1), error(2, 14)],
+    },
+    {
+      code: `document.l10n.formatValue('foobar');
+             if (foo) {
+               document.l10n.formatValue('foobiz');
+             }
+             document.l10n.formatValue('foobaz');`,
+      errors: [error(1, 1), error(5, 14)],
+    },
+    {
+      code: `document.l10n.formatValues('foobar');
+             document.l10n.formatValue('foobaz');`,
+      errors: [error(1, 1), error(2, 14)],
+    },
+  ],
+});