Added check for negative segment-size

Closes-Bug: #1453135

Change-Id: Ia9c2b27d998e6ac1889cc74c12e456c06ecd84d9

swiftclient/shell.py

@@ -763,6 +763,9 @@ def st_upload(parser, args, output_manager):
                 return
 
             options.segment_size = str((1024 ** size_mod) * multiplier)
+        if int(options.segment_size) <= 0:
+            output_manager.error("segment-size should be positive")
+            return
 
     _opts = vars(options)
     _opts['object_uu_threads'] = options.object_threads

tests/unit/test_shell.py

@@ -897,6 +897,29 @@ class TestShell(unittest.TestCase):
                     swiftclient.shell.main(argv)
                 self.assertEquals(output.err, "Invalid segment size\n")
 
+    def test_negative_upload_segment_size(self):
+        with CaptureOutput() as output:
+            with ExpectedException(SystemExit):
+                argv = ["", "upload", "-S", "-40", "container", "object"]
+                swiftclient.shell.main(argv)
+            self.assertEquals(output.err, "segment-size should be positive\n")
+            output.clear()
+            with ExpectedException(SystemExit):
+                argv = ["", "upload", "-S", "-40K", "container", "object"]
+                swiftclient.shell.main(argv)
+            self.assertEquals(output.err, "segment-size should be positive\n")
+            output.clear()
+            with ExpectedException(SystemExit):
+                argv = ["", "upload", "-S", "-40M", "container", "object"]
+                swiftclient.shell.main(argv)
+            self.assertEquals(output.err, "segment-size should be positive\n")
+            output.clear()
+            with ExpectedException(SystemExit):
+                argv = ["", "upload", "-S", "-40G", "container", "object"]
+                swiftclient.shell.main(argv)
+            self.assertEquals(output.err, "segment-size should be positive\n")
+            output.clear()
+
 
 class TestSubcommandHelp(unittest.TestCase):