test: add tests for slugify

Author: luxass

src/cli.ts

@@ -27,7 +27,7 @@ cli.command(
     })
     .strict().help(),
   async (args) => {
-    const force = args.force ?? false;
+    const _force = args.force ?? false;
     const versions = Array.isArray(args.versions) ? args.versions : [args.versions];
 
     if (SUPPORTED_EMOJI_VERSIONS.every((v) => !versions.includes(v))) {

src/utils.ts

@@ -1,8 +1,10 @@
 export function slugify(val: string): string {
   return val.normalize("NFD")
+    .toLowerCase()
+    .trim()
     .replace(/[\u0300-\u036F]/g, "")
     .replace(/\(.+\)/g, "")
-    .trim()
     .replace("&", "")
-    .replace(/[\W_]+/g, "-").toLowerCase();
+    .replace(/[\W_]+/g, "-")
+    .replace(/^-+|-+$/g, "");
 }

test/utils.test.ts

@@ -0,0 +1,32 @@
+import { describe, expect, it } from "vitest";
+import { slugify } from "../src/utils";
+
+describe("slugify", () => {
+  it("should convert string to slug format", () => {
+    expect(slugify("Hello World")).toBe("hello-world");
+  });
+
+  it("should remove diacritics", () => {
+    expect(slugify("héllo wörld")).toBe("hello-world");
+  });
+
+  it("should remove parentheses and their content", () => {
+    expect(slugify("hello (world)")).toBe("hello");
+  });
+
+  it("should trim whitespace", () => {
+    expect(slugify("  hello world  ")).toBe("hello-world");
+  });
+
+  it("should remove ampersands", () => {
+    expect(slugify("hello & world")).toBe("hello-world");
+  });
+
+  it("should replace special characters with hyphens", () => {
+    expect(slugify("hello_world!@#$%^")).toBe("hello-world");
+  });
+
+  it("should convert to lowercase", () => {
+    expect(slugify("HELLO WORLD")).toBe("hello-world");
+  });
+});