From e25c78b00ad36c96b864dde2fef73a16e76482db Mon Sep 17 00:00:00 2001
From: Thomas LEVEIL <thomasleveil@gmail.com>
Date: Tue, 21 Feb 2017 01:04:50 +0100
Subject: [PATCH] TESTS: add pytest `incremental` marker to mark tests as
 expected to fail if previous test failed

see http://stackoverflow.com/a/12579625/107049
---
 test/conftest.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/test/conftest.py b/test/conftest.py
index fcff6ea..43f83bb 100644
--- a/test/conftest.py
+++ b/test/conftest.py
@@ -445,6 +445,18 @@ def pytest_runtest_logreport(report):
                 report.longrepr.addsection('nginx-proxy conf', get_nginx_conf_from_container(container))
 
 
+# Py.test `incremental` marker, see http://stackoverflow.com/a/12579625/107049
+def pytest_runtest_makereport(item, call):
+    if "incremental" in item.keywords:
+        if call.excinfo is not None:
+            parent = item.parent
+            parent._previousfailed = item
+
+
+def pytest_runtest_setup(item):
+    previousfailed = getattr(item.parent, "_previousfailed", None)
+    if previousfailed is not None:
+        pytest.xfail("previous test failed (%s)" % previousfailed.name)
 
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