Add test for baseRequest.js

This commit adds tests for baseRequest,
with the aim to improve the code coverage of the
whole repo.

Part of https://github.com/bigchaindb/js-bigchaindb-driver/issues/220

test/base-request/test_baseRequest.js

@@ -0,0 +1,15 @@
+import test from 'ava'
+import baseRequest from '../../src/baseRequest'
+
+test('baseRequest test query and vsprint', async t => {
+    const target = {
+        message: 'HTTP Error: Requested page not reachable',
+        requestURI: 'https://www.google.com/teapot',
+        status: '418 I\'m a Teapot',
+    }
+    const error = await t.throws(baseRequest('https://%s.com/', {
+        urlTemplateSpec: ['google'],
+        query: 'teapot'
+    }))
+    t.deepEqual(target, error)
+})