Add a helper to get the NFTokenID after minting (#2205)

packages/xrpl/test/integration/transactions/nftokenMint.test.ts

@@ -0,0 +1,68 @@
+import { assert } from 'chai'
+import _ from 'lodash'
+import { Client } from 'xrpl'
+
+import {
+  convertStringToHex,
+  getNFTokenID,
+  NFTokenMint,
+  TransactionMetadata,
+} from '../../../src'
+
+// how long before each test case times out
+const TIMEOUT = 20000
+
+describe('NFTokenMint', function () {
+  // TODO: Once we update our integration tests to handle NFTs, replace this client with XrplIntegrationTestContext
+  it(
+    'get NFTokenID',
+    async function () {
+      const client = new Client('wss://s.altnet.rippletest.net:51233/')
+      await client.connect()
+
+      const { wallet, balance: _balance } = await client.fundWallet()
+
+      const tx: NFTokenMint = {
+        TransactionType: 'NFTokenMint',
+        Account: wallet.address,
+        URI: convertStringToHex('https://www.google.com'),
+        NFTokenTaxon: 0,
+      }
+      try {
+        const response = await client.submitAndWait(tx, {
+          wallet,
+        })
+        assert.equal(response.type, 'response')
+        assert.equal(
+          (response.result.meta as TransactionMetadata).TransactionResult,
+          'tesSUCCESS',
+        )
+
+        const accountNFTs = await client.request({
+          command: 'account_nfts',
+          account: wallet.address,
+        })
+
+        const nftokenID =
+          getNFTokenID(response.result.meta as TransactionMetadata) ??
+          'undefined'
+        const accountHasNFT = accountNFTs.result.account_nfts.some(
+          (value) => value.NFTokenID === nftokenID,
+        )
+
+        assert.isTrue(
+          accountHasNFT,
+          `Expected to find an NFT with NFTokenID ${nftokenID} in account ${
+            wallet.address
+          } but did not find it.
+        \n\nHere's what was returned from 'account_nfts' for ${
+          wallet.address
+        }: ${JSON.stringify(accountNFTs)}`,
+        )
+      } finally {
+        await client.disconnect()
+      }
+    },
+    TIMEOUT,
+  )
+})