--- a/test/unittest_dataimport.py	Mon Jun 02 15:53:09 2014 +0200
+++ b/test/unittest_dataimport.py	Mon Jun 02 17:51:45 2014 +0200
@@ -1,7 +1,69 @@
+# -*- coding: utf-8 -*-
+import datetime as DT
 from StringIO import StringIO
 from logilab.common.testlib import TestCase, unittest_main
 from cubicweb import dataimport
 
+class CreateCopyFromBufferTC(TestCase):
+
+    # test converters
+
+    def test_convert_none(self):
+        cnvt = dataimport._copyfrom_buffer_convert_None
+        self.assertEqual('NULL', cnvt(None))
+
+    def test_convert_number(self):
+        cnvt = dataimport._copyfrom_buffer_convert_number
+        self.assertEqual('42', cnvt(42))
+        self.assertEqual('42', cnvt(42L))
+        self.assertEqual('42.42', cnvt(42.42))
+
+    def test_convert_string(self):
+        cnvt = dataimport._copyfrom_buffer_convert_string
+        # simple
+        self.assertEqual('babar', cnvt('babar'))
+        # unicode
+        self.assertEqual('\xc3\xa9l\xc3\xa9phant', cnvt(u'éléphant'))
+        self.assertEqual('\xe9l\xe9phant', cnvt(u'éléphant', encoding='latin1'))
+        self.assertEqual('babar#', cnvt('babar\t', replace_sep='#'))
+        self.assertRaises(ValueError, cnvt, 'babar\t')
+
+    def test_convert_date(self):
+        cnvt = dataimport._copyfrom_buffer_convert_date
+        self.assertEqual('0666-01-13', cnvt(DT.date(666, 1, 13)))
+
+    def test_convert_time(self):
+        cnvt = dataimport._copyfrom_buffer_convert_time
+        self.assertEqual('06:06:06.000100', cnvt(DT.time(6, 6, 6, 100)))
+
+    def test_convert_datetime(self):
+        cnvt = dataimport._copyfrom_buffer_convert_datetime
+        self.assertEqual('0666-06-13 06:06:06.000000', cnvt(DT.datetime(666, 6, 13, 6, 6, 6)))
+
+    # test buffer
+    def test_create_copyfrom_buffer_tuple(self):
+        cnvt = dataimport._create_copyfrom_buffer
+        data = ((42, 42L, 42.42, u'éléphant', DT.date(666, 1, 13), DT.time(6, 6, 6), DT.datetime(666, 6, 13, 6, 6, 6)),
+                (6, 6L, 6.6, u'babar', DT.date(2014, 1, 14), DT.time(4, 2, 1), DT.datetime(2014, 1, 1, 0, 0, 0)))
+        results = dataimport._create_copyfrom_buffer(data)
+        # all columns
+        expected = '''42\t42\t42.42\téléphant\t0666-01-13\t06:06:06.000000\t0666-06-13 06:06:06.000000
+6\t6\t6.6\tbabar\t2014-01-14\t04:02:01.000000\t2014-01-01 00:00:00.000000'''
+        self.assertMultiLineEqual(expected, results.getvalue())
+        # selected columns
+        results = dataimport._create_copyfrom_buffer(data, columns=(1, 3, 6))
+        expected = '''42\téléphant\t0666-06-13 06:06:06.000000
+6\tbabar\t2014-01-01 00:00:00.000000'''
+        self.assertMultiLineEqual(expected, results.getvalue())
+
+    def test_create_copyfrom_buffer_dict(self):
+        cnvt = dataimport._create_copyfrom_buffer
+        data = (dict(integer=42, double=42.42, text=u'éléphant', date=DT.datetime(666, 6, 13, 6, 6, 6)),
+                dict(integer=6, double=6.6, text=u'babar', date=DT.datetime(2014, 1, 1, 0, 0, 0)))
+        results = dataimport._create_copyfrom_buffer(data, ('integer', 'text'))
+        expected = '''42\téléphant\n6\tbabar'''
+        self.assertMultiLineEqual(expected, results.getvalue())
+
 
 class UcsvreaderTC(TestCase):