X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/45f10d80d1b584808a6e375214b5be6bc7d2a730..b04638275cff9b393e1bc04136d44f361b999cf8:/sdk/python/tests/test_stream.py?ds=sidebyside

diff --git a/sdk/python/tests/test_stream.py b/sdk/python/tests/test_stream.py
index 6c3bd61414..082af1bb7c 100644
--- a/sdk/python/tests/test_stream.py
+++ b/sdk/python/tests/test_stream.py
@@ -70,13 +70,16 @@ class StreamFileReaderTestCase(unittest.TestCase):
 
     def test_seek_min_zero(self):
         sfile = self.make_count_reader()
-        sfile.seek(-2, os.SEEK_SET)
+        self.assertEqual(0, sfile.tell())
+        with self.assertRaises(IOError):
+            sfile.seek(-2, os.SEEK_SET)
         self.assertEqual(0, sfile.tell())
 
     def test_seek_max_size(self):
         sfile = self.make_count_reader()
         sfile.seek(2, os.SEEK_END)
-        self.assertEqual(9, sfile.tell())
+        # POSIX permits seeking past end of file.
+        self.assertEqual(11, sfile.tell())
 
     def test_size(self):
         self.assertEqual(9, self.make_count_reader().size())
@@ -184,6 +187,19 @@ class StreamFileReaderTestCase(unittest.TestCase):
     def test_bz2_decompression(self):
         self.check_decompression('bz2', bz2.compress)
 
+    def test_readline_then_readlines(self):
+        reader = self.make_newlines_reader()
+        data = reader.readline()
+        self.assertEqual('one\n', data)
+        data = reader.readlines()
+        self.assertEqual(['two\n', '\n', 'three\n', 'four\n', '\n'], data)
+
+    def test_readline_then_readall(self):
+        reader = self.make_newlines_reader()
+        data = reader.readline()
+        self.assertEqual('one\n', data)
+        self.assertEqual(''.join(['two\n', '\n', 'three\n', 'four\n', '\n']), ''.join(reader.readall()))
+
 
 class StreamRetryTestMixin(object):
     # Define reader_for(coll_name, **kwargs)