Create algorithm for converting binary data to base64

Conversions/test/ArrayBufferToBase64.test.js

@@ -0,0 +1,24 @@
+import { bufferToBase64 } from '../ArrayBufferToBase64'
+import { TextEncoder } from 'util'
+
+describe('ArrayBufferToBase64', () => {
+  it('should encode "Hello, world!" as "SGVsbG8sIHdvcmxkIQ=="', () => {
+    const testString = 'Hello, world!'
+    const encoder = new TextEncoder()
+    const helloWorldBuffer = encoder.encode(testString)
+    const result = bufferToBase64(helloWorldBuffer)
+    expect(result).toBe('SGVsbG8sIHdvcmxkIQ==')
+  })
+
+  it('should encode binary buffer [55,23,177,234,68,26,90] as "Nxex6kQaWg=="', () => {
+    const testBuffer = new Uint8Array([55, 23, 177, 234, 68, 26, 90])
+    const result = bufferToBase64(testBuffer)
+    expect(result).toBe('Nxex6kQaWg==')
+  })
+
+  it('should encode binary buffer [0,1,2,3,4,5,6,7,8,9] as "AAECAwQFBgcICQ=="', () => {
+    const testBuffer = new Uint8Array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])
+    const result = bufferToBase64(testBuffer)
+    expect(result).toBe('AAECAwQFBgcICQ==')
+  })
+})