chore: initial commit

src/_test/index.test.ts

@@ -0,0 +1,17 @@
+import assert from "node:assert/strict"
+import { describe, it } from "node:test"
+import { fn } from "../index.ts"
+
+describe("index", () => {
+  it('should return "Hello, tsdown!"', () => {
+    // Arrange - Given
+    const input = "tsdown"
+
+    // Act - When
+    const output = fn(input)
+
+    // Assert - Then
+    const expected = "Hello, tsdown!"
+    assert.strictEqual(output, expected)
+  })
+})

src/index.ts

@@ -0,0 +1,3 @@
+export const fn = (input: string): string => {
+  return `Hello, ${input}!`
+}