[catapult] - Copy Telemetry's gsutilz over to third_party.

third_party/gsutil/third_party/apitools/apitools/base/py/stream_slice_test.py

Index: third_party/gsutil/third_party/apitools/apitools/base/py/stream_slice_test.py
diff --git a/third_party/gsutil/third_party/apitools/apitools/base/py/stream_slice_test.py b/third_party/gsutil/third_party/apitools/apitools/base/py/stream_slice_test.py
new file mode 100644
index 0000000000000000000000000000000000000000..f9b13b99a95481fd42b15c06d8c1f70f1bb196fa
--- /dev/null
+++ b/third_party/gsutil/third_party/apitools/apitools/base/py/stream_slice_test.py
@@ -0,0 +1,50 @@
+"""Tests for stream_slice."""
+
+import string
+
+import six
+import unittest2
+
+from apitools.base.py import exceptions
+from apitools.base.py import stream_slice
+
+
+class StreamSliceTest(unittest2.TestCase):
+
+    def setUp(self):
+        self.stream = six.StringIO(string.ascii_letters)
+        self.value = self.stream.getvalue()
+        self.stream.seek(0)
+
+    def testSimpleSlice(self):
+        ss = stream_slice.StreamSlice(self.stream, 10)
+        self.assertEqual('', ss.read(0))
+        self.assertEqual(self.value[0:3], ss.read(3))
+        self.assertIn('7/10', str(ss))
+        self.assertEqual(self.value[3:10], ss.read())
+        self.assertEqual('', ss.read())
+        self.assertEqual('', ss.read(10))
+        self.assertEqual(10, self.stream.tell())
+
+    def testEmptySlice(self):
+        ss = stream_slice.StreamSlice(self.stream, 0)
+        self.assertEqual('', ss.read(5))
+        self.assertEqual('', ss.read())
+        self.assertEqual(0, self.stream.tell())
+
+    def testOffsetStream(self):
+        self.stream.seek(26)
+        ss = stream_slice.StreamSlice(self.stream, 26)
+        self.assertEqual(self.value[26:36], ss.read(10))
+        self.assertEqual(self.value[36:], ss.read())
+        self.assertEqual('', ss.read())
+
+    def testTooShortStream(self):
+        ss = stream_slice.StreamSlice(self.stream, 1000)
+        self.assertEqual(self.value, ss.read())
+        self.assertEqual('', ss.read(0))
+        with self.assertRaises(exceptions.StreamExhausted) as e:
+            ss.read()
+        with self.assertRaises(exceptions.StreamExhausted) as e:
+            ss.read(10)
+        self.assertIn('exhausted after %d' % len(self.value), str(e.exception))