node vs web testing with jasmine

spec/node/services/nodeCryptoFunction.service.spec.ts

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+import { NodeCryptoFunctionService } from '../../../src/services/nodeCryptoFunction.service';
+
+import { UtilsService } from '../../../src/services/utils.service';
+
+describe('NodeCrypto Function Service', () => {
+    describe('aesEncrypt', () => {
+        it('should successfully aes encrypt data', async () => {
+            const nodeCryptoFunctionService = new NodeCryptoFunctionService();
+            const iv = makeStaticByteArray(16);
+            const key = makeStaticByteArray(32);
+            const data = UtilsService.fromUtf8ToArray('EncryptMe!');
+            const encValue = await nodeCryptoFunctionService.aesEncrypt(data.buffer, iv.buffer, key.buffer);
+            expect(UtilsService.fromBufferToB64(encValue)).toBe('ByUF8vhyX4ddU9gcooznwA==');
+        });
+    });
+
+    describe('aesDecryptSmall', () => {
+        it('should successfully aes decrypt data', async () => {
+            const nodeCryptoFunctionService = new NodeCryptoFunctionService();
+            const iv = makeStaticByteArray(16);
+            const key = makeStaticByteArray(32);
+            const data = UtilsService.fromB64ToArray('ByUF8vhyX4ddU9gcooznwA==');
+            const decValue = await nodeCryptoFunctionService.aesDecryptLarge(data.buffer, iv.buffer, key.buffer);
+            expect(UtilsService.fromBufferToUtf8(decValue)).toBe('EncryptMe!');
+        });
+    });
+
+    describe('aesDecryptLarge', () => {
+        it('should successfully aes decrypt data', async () => {
+            const nodeCryptoFunctionService = new NodeCryptoFunctionService();
+            const iv = makeStaticByteArray(16);
+            const key = makeStaticByteArray(32);
+            const data = UtilsService.fromB64ToArray('ByUF8vhyX4ddU9gcooznwA==');
+            const decValue = await nodeCryptoFunctionService.aesDecryptLarge(data.buffer, iv.buffer, key.buffer);
+            expect(UtilsService.fromBufferToUtf8(decValue)).toBe('EncryptMe!');
+        });
+    });
+
+    describe('randomBytes', () => {
+        it('should make a value of the correct length', async () => {
+            const nodeCryptoFunctionService = new NodeCryptoFunctionService();
+            const randomData = await nodeCryptoFunctionService.randomBytes(16);
+            expect(randomData.byteLength).toBe(16);
+        });
+
+        it('should not make the same value twice', async () => {
+            const nodeCryptoFunctionService = new NodeCryptoFunctionService();
+            const randomData = await nodeCryptoFunctionService.randomBytes(16);
+            const randomData2 = await nodeCryptoFunctionService.randomBytes(16);
+            expect(randomData.byteLength === randomData2.byteLength && randomData !== randomData2).toBeTruthy();
+        });
+    });
+});
+
+function makeStaticByteArray(length: number) {
+    const arr = new Uint8Array(length);
+    for (let i = 0; i < length; i++) {
+        arr[i] = i;
+    }
+    return arr;
+}
+