Add a test for Trader API

test/unit/traderApiTest.js

@@ -0,0 +1,29 @@
+'use strict';
+
+var assert = require('chai').assert;
+var Trader = require('../../lib/trader.js');
+var PostgresqlInterface = require('../../lib/protocol/db/postgresql_interface.js');
+
+var db = 'psql://lamassu:lamassu@localhost/lamassu-test';
+var psqlInterface = new PostgresqlInterface(db);
+
+describe('trader/api', function () {
+  it('should throw when trying to create a trader with no DB', function () {
+    assert.throws(function () {
+      new Trader();
+    });
+  });
+
+  it('should throw when trying to configure a trader with `lowBalanceMargin` < 1', function () {
+    var trader = new Trader(psqlInterface);
+    assert.throws(function () {
+      trader.configure({
+        exchanges: {
+          settings: {
+            lowBalanceMargin: 0.8
+          }
+        }
+      });
+    });
+  });
+});