Emit 'row' events on streams for progress tracking

test/copy-to.js

@@ -15,17 +15,22 @@ var testRange = function(top) {
   var fromClient = client()
   var copy = require('../').to
 
-  var txt = 'COPY (SELECT * from generate_series(0, ' + top + ')) TO STDOUT'
+  var txt = 'COPY (SELECT * from generate_series(0, ' + (top - 1) + ')) TO STDOUT'
 
   var stream = fromClient.query(copy(txt))
+  var rowEmitCount = 0
+  stream.on('row', function() {
+    rowEmitCount++
+  })
   var done = gonna('finish piping out', 1000, function() {
     fromClient.end()
   })
 
   stream.pipe(concat(function(buf) {
     var res = buf.toString('utf8')
-    var expected = _.range(0, top+1).join('\n') + '\n'
+    var expected = _.range(0, top).join('\n') + '\n'
     assert.equal(res, expected)
+    assert.equal(rowEmitCount, top, 'should have emitted "row" ' + top + ' times but got ' + rowEmitCount)
     done()
   }))
 }