1 files changed, 124 insertions, 0 deletions
diff --git a/tools/lint/eslint/eslint-plugin-mozilla/tests/no-useless-run-test.js b/tools/lint/eslint/eslint-plugin-mozilla/tests/no-useless-run-test.js
new file mode 100644
index 0000000000..3541467143
--- /dev/null
+++ b/tools/lint/eslint/eslint-plugin-mozilla/tests/no-useless-run-test.js
@@ -0,0 +1,124 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// ------------------------------------------------------------------------------
+// Requirements
+// ------------------------------------------------------------------------------
+
+var rule = require("../lib/rules/no-useless-run-test");
+var RuleTester = require("eslint").RuleTester;
+
+const ruleTester = new RuleTester({ parserOptions: { ecmaVersion: 6 } });
+
+// ------------------------------------------------------------------------------
+// Tests
+// ------------------------------------------------------------------------------
+
+function invalidCode(code, output) {
+  let message =
+    "Useless run_test function - only contains run_next_test; whole function can be removed";
+  return { code, output, errors: [{ message, type: "FunctionDeclaration" }] };
+}
+
+ruleTester.run("no-useless-run-test", rule, {
+  valid: [
+    "function run_test() {}",
+    "function run_test() {let args = 1; run_next_test();}",
+    "function run_test() {fakeCall(); run_next_test();}",
+  ],
+  invalid: [
+    // Single-line case.
+    invalidCode("function run_test() { run_next_test(); }", ""),
+    // Multiple-line cases
+    invalidCode(
+      `
+function run_test() {
+  run_next_test();
+}`,
+      ``
+    ),
+    invalidCode(
+      `
+foo();
+function run_test() {
+ run_next_test();
+}
+`,
+      `
+foo();
+`
+    ),
+    invalidCode(
+      `
+foo();
+function run_test() {
+  run_next_test();
+}
+bar();
+`,
+      `
+foo();
+bar();
+`
+    ),
+    invalidCode(
+      `
+foo();
+
+function run_test() {
+  run_next_test();
+}
+
+bar();`,
+      `
+foo();
+
+bar();`
+    ),
+    invalidCode(
+      `
+foo();
+
+function run_test() {
+  run_next_test();
+}
+
+// A comment
+bar();
+`,
+      `
+foo();
+
+// A comment
+bar();
+`
+    ),
+    invalidCode(
+      `
+foo();
+
+/**
+ * A useful comment.
+ */
+function run_test() {
+  run_next_test();
+}
+
+// A comment
+bar();
+`,
+      `
+foo();
+
+/**
+ * A useful comment.
+ */
+
+// A comment
+bar();
+`
+    ),
+  ],
+});