test(core): added test for event body methods

src/v2/core/event-body.ts

@@ -16,7 +16,7 @@ export function getEventBodyAsBuffer(
   body: string,
   isBase64Encoded: boolean,
 ): [body: Buffer, contentLength: number] {
-  const encoding = isBase64Encoded ? 'base64' : 'utf8';
+  const encoding: BufferEncoding = isBase64Encoded ? 'base64' : 'utf8';
 
   const buffer = Buffer.from(body, encoding);
   const contentLength = Buffer.byteLength(buffer, encoding);

test/core/event-body.spec.ts

@@ -0,0 +1,25 @@
+import { getEventBodyAsBuffer } from '../../src/v2/core';
+
+describe('getEventBodyAsBuffer', () => {
+  it('should return correctly the body in utf-8 as buffer', () => {
+    const body = '{}';
+
+    const [bodyAsBuffer, contentLength] = getEventBodyAsBuffer(body, false);
+
+    expect(bodyAsBuffer).toBeInstanceOf(Buffer);
+    expect(contentLength).toBe(2);
+
+    expect(bodyAsBuffer.toString('utf8')).toBe(body);
+  });
+
+  it('should return correctly the body in base64 as buffer', () => {
+    const body = Buffer.from('{}', 'utf8').toString('base64');
+
+    const [bodyAsBuffer, contentLength] = getEventBodyAsBuffer(body, true);
+
+    expect(bodyAsBuffer).toBeInstanceOf(Buffer);
+    expect(contentLength).toBe(2);
+
+    expect(bodyAsBuffer.toString('base64')).toBe(body);
+  });
+});