added anonymous service test

src/services/anonymous.ts

@@ -154,10 +154,10 @@ export class AnonymousService extends Service implements AnonymousServicePropert
           ChainAPI.circuit(this.chainCircuits.wasmURI),
         ])
       )
-      .then((files) => {
-        this.chainCircuits.zKeyData = files[0];
-        this.chainCircuits.vKeyData = files[1];
-        this.chainCircuits.wasmData = files[2];
+      .then(([zKeyData, vKeyData, wasmData]) => {
+        this.chainCircuits.zKeyData = zKeyData;
+        this.chainCircuits.vKeyData = vKeyData;
+        this.chainCircuits.wasmData = wasmData;
         return this.checkCircuitsHashes();
       });
   }

test/services/anonymous.test.ts

@@ -0,0 +1,29 @@
+import { AnonymousService, ChainCircuits } from '../../src';
+// @ts-ignore
+import { URL } from './util/client.params';
+import { sha256 } from '@ethersproject/sha2';
+
+describe('Anonymous Service tests', () => {
+  it('should have the correct type and properties', () => {
+    const service = new AnonymousService({});
+    expect(service).toBeInstanceOf(AnonymousService);
+    expect(service.url).toBeUndefined();
+  });
+  it('should have set the correct parameters', async () => {
+    const chainCircuits: ChainCircuits = {
+      zKeyData: new Uint8Array(),
+      zKeyHash: sha256(new Uint8Array()),
+      zKeyURI: '',
+      vKeyData: new Uint8Array(),
+      vKeyHash: sha256(new Uint8Array()),
+      vKeyURI: '',
+      wasmData: new Uint8Array(),
+      wasmHash: sha256(new Uint8Array()),
+      wasmURI: '',
+    };
+    const service = new AnonymousService({ url: URL, chainCircuits });
+    expect(service.url).toEqual(URL);
+    expect(service.chainCircuits).toEqual(chainCircuits);
+    expect(service.checkCircuitsHashes()).toBeTruthy();
+  });
+});