test: persist modified settings

Author: sagold

src/settings.test.ts

@@ -0,0 +1,21 @@
+import settings from "./settings";
+import { strict as assert } from "assert";
+
+describe("settings", () => {
+    let _regex: string;
+    beforeEach(() => {
+        _regex = settings.REGEX_FLAGS;
+        assert(settings.REGEX_FLAGS !== "v");
+        settings.REGEX_FLAGS = "v";
+    });
+
+    it("should store modifications", async () => {
+        const { default: settings } = require("./settings");
+
+        assert.equal(settings.REGEX_FLAGS, "v");
+    });
+
+    afterEach(() => {
+        settings.REGEX_FLAGS = _regex;
+    });
+});