[ts-sdk] Add unit tests for JSON-RPC Client

sdk/typescript/package.json

@@ -48,6 +48,7 @@
     "@size-limit/preset-small-lib": "^7.0.8",
     "@types/bn.js": "^5.1.0",
     "husky": "^7.0.4",
+    "mockttp": "^2.7.0",
     "size-limit": "^7.0.8",
     "tsdx": "^0.14.1",
     "tslib": "^2.3.1",
@@ -56,6 +57,7 @@
   "dependencies": {
     "bn.js": "^5.2.0",
     "buffer": "^6.0.3",
+    "cross-fetch": "^3.1.5",
     "jayson": "^3.6.6",
     "superstruct": "^0.15.4",
     "tweetnacl": "^1.0.3",

sdk/typescript/src/rpc/client.ts

@@ -13,6 +13,7 @@ import {
   any,
   is,
 } from 'superstruct';
+import fetch from 'cross-fetch';
 
 /**
  * An object defining headers to be passed to the RPC server

sdk/typescript/test/mocks/rpc-http.ts

@@ -0,0 +1,39 @@
+// Copyright (c) 2022, Mysten Labs, Inc.
+// SPDX-License-Identifier: Apache-2.0
+
+import * as mockttp from 'mockttp';
+
+export const mockServer: mockttp.Mockttp = mockttp.getLocal();
+
+export const MOCK_PORT = 9999;
+export const MOCK_URL = 'http://127.0.0.1';
+export const MOCK_ENDPOINT = `${MOCK_URL}:${MOCK_PORT}/`;
+
+export const mockRpcResponse = async ({
+  method,
+  params,
+  value,
+  error,
+}: {
+  method: string;
+  params: Array<any>;
+  value?: any;
+  error?: any;
+}) => {
+  await mockServer
+    .forPost('/')
+    .withJsonBodyIncluding({
+      jsonrpc: '2.0',
+      method,
+      params,
+    })
+    .thenReply(
+      200,
+      JSON.stringify({
+        jsonrpc: '2.0',
+        id: '',
+        error,
+        result: value,
+      })
+    );
+};

sdk/typescript/test/rpc/client.test.ts

@@ -0,0 +1,50 @@
+// Copyright (c) 2022, Mysten Labs, Inc.
+// SPDX-License-Identifier: Apache-2.0
+
+import { type as pick, array } from 'superstruct';
+import { JsonRpcClient } from '../../src/rpc/client';
+import { ObjectRef } from '../../src';
+import {
+  mockRpcResponse,
+  mockServer,
+  MOCK_ENDPOINT,
+  MOCK_PORT,
+} from '../mocks/rpc-http';
+
+const EXAMPLE_OBJECT = {
+  objectId: '8dc6a6f70564e29a01c7293a9c03818fda2d049f',
+  version: 0,
+  digest: 'CI8Sf+t3Xrt5h9ENlmyR8bbMVfg6df3vSDc08Gbk9/g=',
+};
+
+describe('JSON-RPC Client', () => {
+  const server = mockServer;
+  let client: JsonRpcClient;
+
+  beforeEach(() => {
+    server.start(MOCK_PORT);
+    client = new JsonRpcClient(MOCK_ENDPOINT);
+  });
+
+  afterEach(() => {
+    server.stop();
+  });
+
+  it('requestWithType', async () => {
+    await mockRpcResponse({
+      method: 'sui_getOwnedObjects',
+      params: [],
+      value: {
+        objects: [EXAMPLE_OBJECT],
+      },
+    });
+
+    const resp = await client.requestWithType(
+      'sui_getOwnedObjects',
+      [],
+      pick({ objects: array(ObjectRef) })
+    );
+    expect(resp.objects.length).toEqual(1);
+    expect(resp.objects[0]).toEqual(EXAMPLE_OBJECT);
+  });
+});