Added Unit Tests for Avatar component (#131)

src/__tests__/unit/components/Avatar.test.tsx

@@ -0,0 +1,52 @@
+import { cleanup, render, screen } from "@testing-library/react"
+import { afterEach, describe, expect, it, vi } from "vitest"
+
+import { Avatar } from "@/components/avatar"
+
+// Mock Next.js Image component
+vi.mock("next/image", () => ({
+    default: ({ src, alt }: { src: string; alt: string }) => <img src={src} alt={alt} />,
+}))
+//It cleans up the dom after each test
+afterEach(() => {
+    cleanup()
+})
+
+describe("Avatar", () => {
+    it("renders an image when src is provided", () => {
+        render(<Avatar src="/test-image.jpg" alt="Test Avatar" />)
+        const img = screen.getByRole("img")
+        expect(img).toBeDefined()
+        expect(img.getAttribute("src")).toBe("/test-image.jpg")
+    })
+
+    it("renders fallback text when src is empty", () => {
+        render(<Avatar src="" alt="Test Avatar" fallback="T" />)
+        const fallback = screen.getByText("T")
+        expect(fallback).toBeDefined()
+        expect(fallback.tagName).toBe("SPAN")
+        expect(fallback.className).includes("font-medium uppercase")
+    })
+
+    it("applies custom className", () => {
+        render(<Avatar src="/test-image.jpg" alt="Test Avatar" className="custom-class" />)
+        const avatar = screen.getByRole("img").parentElement
+        expect(avatar?.className).toContain("custom-class")
+    })
+
+    it("applies different size variant", () => {
+        render(<Avatar src="/test-image.jpg" alt="Test Avatar" size="lg" />)
+        render(<Avatar src="/test-image.jpg" alt="Test Avatar" size="sm" />)
+
+        const [lgAvatar, smAvatar] = screen.getAllByRole("img").map((img) => img.parentElement)
+
+        expect(lgAvatar?.className).toContain("w-12 h-12")
+        expect(smAvatar?.className).toContain("w-8 h-8")
+    })
+
+    it("uses medium size as default", () => {
+        render(<Avatar src="/test-image.jpg" alt="Test Avatar" />)
+        const avatar = screen.getByRole("img").parentElement
+        expect(avatar?.className).toContain("w-10 h-10")
+    })
+})