shows event that leads to "Offer total cannot be negative" error

test/amount-test-error.js

@@ -0,0 +1,46 @@
+'use strict';
+const assert = require('assert');
+const Amount = require('ripple-lib').Amount;
+const Remote = require('ripple-lib').Remote;
+
+const data = require('./fixtures/negative-error');
+
+
+describe.skip('Amount ', function() {
+  it('Show "Offer total cannot be negative" error', function() {
+    const a1 = {
+      currency: 'JPY',
+      issuer: 'r94s8px6kSw1uZ1MV98dhSRTvc6VMPoPcN',
+      value: '66436.33517689175'
+    };
+    const a2 = {
+      currency: 'JPY',
+      issuer: 'r94s8px6kSw1uZ1MV98dhSRTvc6VMPoPcN',
+      value: '66435.49665972557'
+    };
+    const a1a = Amount.from_json(a1);
+    const res = a1a.add(a2).subtract(a2).subtract(a1);
+
+    console.log(res.to_human());
+    assert(!res.is_negative(), 'Offer total cannot be negative');
+  });
+
+  it('Show Details of "Offer total cannot be negative" error', function() {
+    const book = new Remote().createOrderBook({
+      currency_gets: 'JPY',
+      issuer_gets: 'r94s8px6kSw1uZ1MV98dhSRTvc6VMPoPcN',
+      currency_pays: 'XRP'
+    });
+    book._subscribed = true;
+    book._synced = true;
+    book._offers = data._offers;
+    book._offerCounts = data._offerCounts;
+    book._ownerFundsUnadjusted = data._ownerFundsUnadjusted;
+    book._ownerFunds = data._ownerFunds;
+    book._ownerOffersTotal = data._ownerOffersTotal;
+    book._issuerTransferRate = 1000000000;
+    book._remote._handleTransaction(data.message1);
+    book._remote._handleTransaction(data.lastMessage);
+  });
+
+});