tests: loop faucet until an unspent is given

test/integration/_blockchain.js

@@ -1,3 +1,4 @@
+var async = require('async')
 var Blockchain = require('cb-http-client')
 var httpify = require('httpify')
 
@@ -5,16 +6,42 @@ var BLOCKTRAIL_API_KEY = process.env.BLOCKTRAIL_API_KEY || 'c0bd8155c66e3fb148bb
 
 var mainnet = new Blockchain('https://api.blocktrail.com/cb/v0.2.1/BTC', { api_key: BLOCKTRAIL_API_KEY })
 var testnet = new Blockchain('https://api.blocktrail.com/cb/v0.2.1/tBTC', { api_key: BLOCKTRAIL_API_KEY })
-testnet.faucet = function faucet (address, amount, callback) {
-  httpify({
-    method: 'POST',
-    url: 'https://api.blocktrail.com/v1/tBTC/faucet/withdrawl?api_key=' + BLOCKTRAIL_API_KEY,
-    headers: { 'Content-Type': 'application/json' },
-    body: JSON.stringify({
-      address: address,
-      amount: amount
-    })
-  }, callback)
+
+testnet.faucet = function faucet (address, amount, done) {
+  var unspents = []
+
+  async.whilst(
+    function condition () { return unspents.length === 0 },
+    function f (callback) {
+      httpify({
+        method: 'POST',
+        url: 'https://api.blocktrail.com/v1/tBTC/faucet/withdrawl?api_key=' + BLOCKTRAIL_API_KEY,
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          address: address,
+          amount: amount
+        })
+      }, function (err) {
+        if (err) return callback(err)
+
+        testnet.addresses.unspents(address, function (err, result) {
+          if (err) return callback(err)
+
+          // filter small unspents
+          unspents = result.filter(function (unspent) {
+            return unspent.value > 1e3
+          })
+
+          callback()
+        })
+      })
+    },
+    function (err) {
+      if (err) return done(err)
+
+      done(null, unspents)
+    }
+  )
 }
 
 module.exports = {