adds failing test

- appears that timestamp queries emit a lot of `rows` with length == 0
- `self.once('end')` is added each of these times
- assertion on listener count shows that more than 10 listeners are applied

test/stream-tester-timestamp.js

@@ -0,0 +1,29 @@
+var pg = require('pg.js')
+var QueryStream = require('../')
+var spec = require('stream-spec')
+var assert = require('assert')
+
+require('./helper')(function(client) {
+  it('should not warn about max listeners', function(done) {
+    var sql = 'SELECT * FROM generate_series(\'1983-12-30 00:00\'::timestamp, \'2013-12-30 00:00\', \'1 years\')'
+    var result = []
+    var stream = new QueryStream(sql, [])
+    var ended = false
+    var query = client.query(stream)
+    query.
+      on('end', function() { ended = true })
+    spec(query)
+      .readable()
+      .pausable({strict: true})
+      .validateOnExit()
+    ;
+    var checkListeners = function() {
+      assert(stream.listeners('end').length < 10)
+      if (!ended)
+        setImmediate(checkListeners)
+      else
+        done()
+    }
+    checkListeners()
+  })
+})