try to avoid removal of crossgraded packages

The user has to approve the removal of a crossgraded package as it might
be needed to remove it (temporarily) in the process, but in most cases
we can happily avoid it and let dpkg unpack over it skipping the
remove. This has some effects on progress reporting and how deal with
selections through which makes this a tiny bit complicated.

1 files changed, 49 insertions, 0 deletions

diff --git a/test/integration/test-crossgrades b/test/integration/test-crossgrades
new file mode 100755
index 000000000..d412546c1
--- /dev/null
+++ b/test/integration/test-crossgrades
@@ -0,0 +1,49 @@
+#!/bin/sh
+set -e
+
+TESTDIR="$(readlink -f "$(dirname "$0")")"
+. "$TESTDIR/framework"
+
+setupenvironment
+configarchitecture 'i386' 'amd64' 'armel'
+configdpkgnoopchroot
+
+buildsimplenativepackage 'unrelated' 'amd64' '1' 'stable'
+buildsimplenativepackage 'crosser' 'i386,armel' '1' 'stable' 'Multi-Arch: same'
+buildsimplenativepackage 'crosser' 'amd64' '2' 'unstable'
+setupaptarchive
+
+singleinstance() {
+	testsuccess apt install crosser:i386=1 unrelated:amd64 -y --planner $1
+	testdpkginstalled 'crosser:i386' 'unrelated'
+
+	testsuccess apt install crosser:amd64 -y -o Debug::pkgDpkgPm=1 -o Dpkg::Use-Pty=0 --purge --planner $1
+	cp -a rootdir/tmp/testsuccess.output crosser.output
+	testfailure grep -- '--remove.*crosser.*' crosser.output
+	testfailure grep -- '--purge' crosser.output
+	testsuccess apt install crosser:amd64 unrelated:amd64- -y -o Dpkg::Use-Pty=0 --purge -o Debug::pkgDPkgProgressReporting=1 --planner $1
+	testdpkgnotinstalled 'crosser:i386' 'unrelated'
+	testdpkginstalled 'crosser:amd64'
+
+	testsuccess apt purge crosser:amd64 -y --planner $1
+	testdpkgnotinstalled 'crosser:amd64'
+}
+singleinstance 'internal'
+singleinstance 'apt'
+
+multiinstance() {
+	testsuccess apt install crosser:i386=1 crosser:armel=1 unrelated:amd64 -y --planner $1
+	testdpkginstalled 'crosser:i386' 'crosser:armel' 'unrelated'
+
+	testsuccess apt install crosser:amd64 -y -o Debug::pkgDpkgPm=1 -o Dpkg::Use-Pty=0 --purge --planner $1
+	cp -a rootdir/tmp/testsuccess.output crosser.output
+	testsuccess grep -- '--remove.*crosser.*' crosser.output
+	testsuccess grep -- '--purge' crosser.output
+	testsuccess apt install crosser:amd64 unrelated:amd64- -y -o Dpkg::Use-Pty=0 --purge -o Debug::pkgDPkgProgressReporting=1 --planner $1
+	testdpkgnotinstalled 'crosser:i386' 'crosser:armel' 'unrelated'
+	testdpkginstalled 'crosser:amd64'
+
+	testsuccess apt purge crosser:amd64 -y --planner $1
+	testdpkgnotinstalled 'crosser:amd64'
+}
+multiinstance 'internal'