diff --git a/src/module/setChartData.js b/src/module/setChartData.js
index d8278bb..872b85b 100644
--- a/src/module/setChartData.js
+++ b/src/module/setChartData.js
@@ -155,6 +155,24 @@ export function timeRange(minTime, maxTime, amount) {
   timeRange = timeRange.map((value) => Math.round(value));
   return timeRange;
 }
+/**
+ * Cubic Bezier curve formula.
+ * @param {number} t - The interpolation parameter (0 to 1).
+ * @param {number} a1 - Control point 1.
+ * @param {number} a2 - Control point 2.
+ * @param {number} a3 - Control point 3.
+ * @param {number} a4 - Control point 4.
+ * @returns {number} The interpolated value.
+ */
+function threebsr(t, a1, a2, a3, a4) {
+  return (
+    (1 - t) * (1 - t) * (1 - t) * a1 +
+    3 * t * (1 - t) * (1 - t) * a2 +
+    3 * t * t * (1 - t) * a3 +
+    t * t * t * a4
+  );
+}
+
 /**
  * Generates smooth Y-axis values using cubic Bezier interpolation
  * to produce evenly spaced ticks matching the X-axis divisions.
@@ -169,16 +187,6 @@ export function yTimeRange(data, yAmount, yMax) {
   const yRange = [];
   const yGap = 1 / (yAmount - 1);
 
-  // Cubic Bezier curve formula
-  const threebsr = function (t, a1, a2, a3, a4) {
-    return (
-      (1 - t) * (1 - t) * (1 - t) * a1 +
-      3 * t * (1 - t) * (1 - t) * a2 +
-      3 * t * t * (1 - t) * a3 +
-      t * t * t * a4
-    );
-  };
-
   for (let j = 0; j < data.length - 1; j++) {
     for (let i = 0; i <= 1; i += yGap * 11) {
       yRange.push(
diff --git a/tests/router/routerGuard.test.js b/tests/router/routerGuard.test.js
index 77e1a94..2e4b2b5 100644
--- a/tests/router/routerGuard.test.js
+++ b/tests/router/routerGuard.test.js
@@ -7,6 +7,32 @@ import { describe, it, expect, beforeEach } from "vitest";
 import { decodeReturnTo } from "@/utils/returnToEncoding";
 import { evaluateAuthNavigation } from "@/router/authGuard";
 
+// Run the real auth guard decision logic from src/router/authGuard.ts
+async function runGuard(to, options = {}) {
+  const { refreshSucceeds = true } = options;
+  return evaluateAuthNavigation(to, {
+    getCookie: (name) => {
+      const cookieArr = document.cookie.split(";");
+      for (const cookie of cookieArr) {
+        const c = cookie.trim();
+        if (c.startsWith(`${name}=`)) {
+          return c.slice(name.length + 1);
+        }
+      }
+      return null;
+    },
+    refreshSession: async () => {
+      if (!refreshSucceeds) {
+        throw new Error("refresh failed");
+      }
+    },
+    setLoginMarker: () => {
+      document.cookie = "isLuciaLoggedIn=true";
+    },
+    encodeReturnTo: (path) => btoa(path),
+  });
+}
+
 describe("router beforeEach guard logic", () => {
   beforeEach(() => {
     // Clear cookies
@@ -18,32 +44,6 @@ describe("router beforeEach guard logic", () => {
     });
   });
 
-  // Run the real auth guard decision logic from src/router/authGuard.ts
-  async function runGuard(to, options = {}) {
-    const { refreshSucceeds = true } = options;
-    return evaluateAuthNavigation(to, {
-      getCookie: (name) => {
-        const cookieArr = document.cookie.split(";");
-        for (const cookie of cookieArr) {
-          const c = cookie.trim();
-          if (c.startsWith(`${name}=`)) {
-            return c.slice(name.length + 1);
-          }
-        }
-        return null;
-      },
-      refreshSession: async () => {
-        if (!refreshSucceeds) {
-          throw new Error("refresh failed");
-        }
-      },
-      setLoginMarker: () => {
-        document.cookie = "isLuciaLoggedIn=true";
-      },
-      encodeReturnTo: (path) => btoa(path),
-    });
-  }
-
   it("redirects logged-in user from Login to Files", () => {
     document.cookie = "isLuciaLoggedIn=true";
     document.cookie = "luciaToken=token";