+ self.assertEqual(b"01234567", writer.read(12))
+
+ self.assertIsNone(c.manifest_locator())
+ self.assertTrue(c.modified())
+ c.save_new("test_truncate")
+ self.assertEqual("zzzzz-4zz18-mockcollection0", c.manifest_locator())
+ self.assertFalse(c.modified())
+
+
+ def test_truncate2(self):
+ keep = ArvadosFileWriterTestCase.MockKeep({
+ "781e5e245d69b566979b86e28d23f2c7+10": b"0123456789",
+ })
+ api = ArvadosFileWriterTestCase.MockApi({
+ "name": "test_truncate2",
+ "manifest_text": ". 781e5e245d69b566979b86e28d23f2c7+10 7f614da9329cd3aebf59b91aadc30bf0+67108864 0:12:count.txt\n",
+ "replication_desired": None,
+ }, {
+ "uuid": "zzzzz-4zz18-mockcollection0",
+ "manifest_text": ". 781e5e245d69b566979b86e28d23f2c7+10 7f614da9329cd3aebf59b91aadc30bf0+67108864 0:12:count.txt\n",
+ "portable_data_hash": "272da898abdf86ddc71994835e3155f8+95",
+ })
+ with Collection('. 781e5e245d69b566979b86e28d23f2c7+10 0:10:count.txt\n',
+ api_client=api, keep_client=keep) as c:
+ writer = c.open("count.txt", "rb+")
+ self.assertEqual(writer.size(), 10)
+ self.assertEqual(b"0123456789", writer.read(12))
+
+ # extend file size
+ writer.truncate(12)
+
+ self.assertEqual(writer.size(), 12)
+ writer.seek(0, os.SEEK_SET)
+ self.assertEqual(b"0123456789\x00\x00", writer.read(12))
+
+ self.assertIsNone(c.manifest_locator())
+ self.assertTrue(c.modified())
+ c.save_new("test_truncate2")
+ self.assertEqual("zzzzz-4zz18-mockcollection0", c.manifest_locator())
+ self.assertFalse(c.modified())
+
+ def test_truncate3(self):
+ keep = ArvadosFileWriterTestCase.MockKeep({
+ "781e5e245d69b566979b86e28d23f2c7+10": b"0123456789",
+ "a925576942e94b2ef57a066101b48876+10": b"abcdefghij",
+ })
+ api = ArvadosFileWriterTestCase.MockApi({
+ "name": "test_truncate",
+ "manifest_text": ". 781e5e245d69b566979b86e28d23f2c7+10 0:8:count.txt\n",
+ "replication_desired": None,
+ }, {
+ "uuid": "zzzzz-4zz18-mockcollection0",
+ "manifest_text": ". 781e5e245d69b566979b86e28d23f2c7+10 0:8:count.txt\n",
+ "portable_data_hash": "7fcd0eaac3aad4c31a6a0e756475da92+52",
+ })
+ with Collection('. 781e5e245d69b566979b86e28d23f2c7+10 a925576942e94b2ef57a066101b48876+10 0:20:count.txt\n',
+ api_client=api, keep_client=keep) as c:
+ writer = c.open("count.txt", "rb+")
+ self.assertEqual(writer.size(), 20)
+ self.assertEqual(b"0123456789ab", writer.read(12))
+ self.assertEqual(12, writer.tell())
+
+ writer.truncate(8)
+
+ # Make sure reading off the end doesn't break
+ self.assertEqual(12, writer.tell())
+ self.assertEqual(b"", writer.read(12))
+
+ self.assertEqual(writer.size(), 8)
+ self.assertEqual(2, writer.seek(-10, os.SEEK_CUR))
+ self.assertEqual(b"234567", writer.read(12))