From 0f5fb7ed05c7911bbfe1583491f735c205453c34 Mon Sep 17 00:00:00 2001
From: Daniel Hahler <git@thequod.de>
Date: Wed, 29 Nov 2017 00:54:14 +0100
Subject: [PATCH] Fix ZeroDivisionError with 0 collected tests

This can easily happen with pytest-testmon.
---
 _pytest/terminal.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/_pytest/terminal.py b/_pytest/terminal.py
index 8538ee6aa..c5cbe14a1 100644
--- a/_pytest/terminal.py
+++ b/_pytest/terminal.py
@@ -313,8 +313,11 @@ class TerminalReporter:
     _PROGRESS_LENGTH = len(' [100%]')
 
     def _get_progress_information_message(self):
-        progress = self._progress_items_reported * 100 // self._session.testscollected
-        return ' [{:3d}%]'.format(progress)
+        collected = self._session.testscollected
+        if collected:
+            progress = self._progress_items_reported * 100 // collected
+            return ' [{:3d}%]'.format(progress)
+        return ' [100%]'
 
     def _write_progress_information_filling_space(self):
         if not self._show_progress_info: