feat: add unstable API for dynamic program loading

web3.js/test/system-program.test.js

@@ -1,6 +1,15 @@
 // @flow
 
-import {Account, SystemProgram, BudgetProgram} from '../src';
+import {
+  Account,
+  BudgetProgram,
+  Connection,
+  SystemProgram,
+  Transaction,
+} from '../src';
+import {mockRpcEnabled} from './__mocks__/node-fetch';
+import {url} from './url';
+import {newAccountWithTokens} from './new-account-with-tokens';
 
 test('createAccount', () => {
   const from = new Account();
@@ -52,4 +61,33 @@ test('assign', () => {
   // TODO: Validate transaction contents more
 });
 
+test('unstable - load', async () => {
+  if (mockRpcEnabled) {
+    console.log('non-live test skipped');
+    return;
+  }
+
+  const connection = new Connection(url);
+  const from = await newAccountWithTokens(connection);
+  const noopProgramId = (new Account()).publicKey;
+
+  const loadTransaction = SystemProgram.load(
+    from.publicKey,
+    noopProgramId,
+    'noop',
+  );
+
+  let signature = await connection.sendTransaction(from, loadTransaction);
+  expect(connection.confirmTransaction(signature)).resolves.toBe(true);
+
+  const noopTransaction = new Transaction({
+    fee: 0,
+    keys: [from.publicKey],
+    programId: noopProgramId,
+  });
+  signature = await connection.sendTransaction(from, noopTransaction);
+  expect(connection.confirmTransaction(signature)).resolves.toBe(true);
+
+
+});