backend(tests): add more tests and isHexColor function

Author: 0l1v3rr

src/utils/validator.ts

@@ -7,7 +7,7 @@ import { formatHexColor } from "./hex-color";
  * @param {string | undefined} width The width.
  * @returns {number} The parsed width.
  */
-export const parseWidth = (width = "495"): number => {
+export const parseWidth = (width: string | undefined = "495"): number => {
   if (width === "495") {
     return 495;
   }
@@ -21,6 +21,18 @@ export const parseWidth = (width = "495"): number => {
   return num;
 };
 
+/**
+ * Function to determine if a string is a valid hexadecimal color.
+ * Starts with #, 3 or 6 characters long, contains only hexadecimal values
+ *
+ * @param {string} color The color string.
+ * @returns {boolean} True if the color is valid.
+ */
+export const isHexColor = (color: string): boolean => {
+  const hexColorRegex = /^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$/;
+  return hexColorRegex.test(color);
+};
+
 /**
  * Converts the line into a Badge array.
  * If there's any error in the line,

test/validator.test.ts

@@ -0,0 +1,50 @@
+import { describe, expect, it } from "vitest";
+import { parseWidth, isHexColor } from "../src/utils/validator";
+
+describe("Width parser", () => {
+  it("should return 495 because the number is not valid", () => {
+    expect(parseWidth("hi")).toEqual(495);
+  });
+
+  it("should return 495", () => {
+    expect(parseWidth("495")).toEqual(495);
+  });
+
+  it("should return 495", () => {
+    expect(parseWidth()).toEqual(495);
+  });
+
+  it("should return 123", () => {
+    expect(parseWidth("123")).toEqual(123);
+  });
+
+  it("should return 643", () => {
+    expect(parseWidth("643")).toEqual(643);
+  });
+});
+
+describe("Hex color validator", () => {
+  it("should return true", () => {
+    expect(isHexColor("#fff")).toEqual(true);
+  });
+
+  it("should return true", () => {
+    expect(isHexColor("#fffaaa")).toEqual(true);
+  });
+
+  it("should return true", () => {
+    expect(isHexColor("#000fff")).toEqual(true);
+  });
+
+  it("should return false", () => {
+    expect(isHexColor("#ffff")).toEqual(false);
+  });
+
+  it("should return false", () => {
+    expect(isHexColor("#fffff")).toEqual(false);
+  });
+
+  it("should return false", () => {
+    expect(isHexColor("ffffff")).toEqual(false);
+  });
+});