emerge: add --complete-graph-if-new-ver < y | n >

Trigger the --complete-graph behavior if an installed package version will
change (upgrade or downgrade). This option is enabled by default.

1 files changed, 66 insertions, 0 deletions

diff --git a/pym/portage/tests/resolver/test_complete_graph.py b/pym/portage/tests/resolver/test_complete_graph.py
new file mode 100644
index 000000000..07206430e
--- /dev/null
+++ b/pym/portage/tests/resolver/test_complete_graph.py
@@ -0,0 +1,66 @@
+# Copyright 2011 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+from portage.tests import TestCase
+from portage.tests.resolver.ResolverPlayground import (ResolverPlayground,
+	ResolverPlaygroundTestCase)
+
+class CompleteGraphTestCase(TestCase):
+
+	def testCompleteGraphVersionChange(self):
+		"""
+		Prevent reverse dependency breakage triggered by version changes.
+		"""
+
+		ebuilds = {
+			"sys-libs/x-0.1": {},
+			"sys-libs/x-1": {},
+			"sys-libs/x-2": {},
+			"sys-apps/a-1": {"RDEPEND" : ">=sys-libs/x-1 <sys-libs/x-2"},
+		}
+
+		installed = {
+			"sys-libs/x-1": {},
+			"sys-apps/a-1": {"RDEPEND" : ">=sys-libs/x-1 <sys-libs/x-2"},
+		}
+
+		world = ["sys-apps/a"]
+
+		test_cases = (
+			ResolverPlaygroundTestCase(
+				[">=sys-libs/x-2"],
+				options = {"--complete-graph-if-new-ver" : "n"},
+				mergelist = ["sys-libs/x-2"],
+				success = True,
+			),
+			ResolverPlaygroundTestCase(
+				[">=sys-libs/x-2"],
+				options = {"--complete-graph-if-new-ver" : "y"},
+				mergelist = ["sys-libs/x-2"],
+				slot_collision_solutions = [],
+				success = False,
+			),
+			ResolverPlaygroundTestCase(
+				["<sys-libs/x-1"],
+				options = {"--complete-graph-if-new-ver" : "n"},
+				mergelist = ["sys-libs/x-0.1"],
+				success = True,
+			),
+			ResolverPlaygroundTestCase(
+				["<sys-libs/x-1"],
+				options = {"--complete-graph-if-new-ver" : "y"},
+				mergelist = ["sys-libs/x-0.1"],
+				slot_collision_solutions = [],
+				success = False,
+			),
+		)
+
+		playground = ResolverPlayground(ebuilds=ebuilds,
+			installed=installed, world=world, debug=False)
+
+		try:
+			for test_case in test_cases:
+				playground.run_TestCase(test_case)
+				self.assertEqual(test_case.test_success, True, test_case.fail_msg)
+		finally:
+			playground.cleanup()