Resolve autopkgtest failures caused by dpkg >= 1.22.12

Streamlining the rules around the Section field and especially what
happens if its isn't present are a good idea in general, but for testing
proposes we want a package without a section ~ something dpkg and co do
not want us to have for good reasons (outside of tests).

While a real nosection package would interact with more of our code, for
this test we don't really need a real one and so we can adopt to the new
reality of encountering such packages only if they are already
installed instead of trying to build a sectionless package by hand.

The other failure is a simple and trivial string change around the
formatting of the version number in dpkg error message about file
overrides, which we can resolve by just not looking at the version to
sidestep dealing with the formatting difference.

References: https://lists.debian.org/debian-dpkg/2024/12/msg00010.html
Closes: #1092090

3 files changed, 12 insertions, 8 deletions

diff --git a/test/integration/framework b/test/integration/framework
index bae14e984..7c1b31ca2 100644
--- a/test/integration/framework
+++ b/test/integration/framework
@@ -1112,9 +1112,11 @@ insertinstalledpackage() {
 	for arch in $(getarchitecturesfromcommalist "$ARCH"); do
 		echo "Package: $NAME
 Status: $STATUS
-Priority: $PRIORITY
-Section: $SECTION
-Installed-Size: 42
+Priority: $PRIORITY" >> "$FILE"
+		if [ "$SECTION" != '<none>' ]; then
+			echo "Section: $SECTION" >> "$FILE"
+		fi
+		echo "Installed-Size: 42
 Maintainer: Joe Sixpack <joe@example.org>
 Version: $VERSION" >> "$FILE"
 		test "$arch" = 'none' || echo "Architecture: $arch" >> "$FILE"
diff --git a/test/integration/test-apt-never-markauto-sections b/test/integration/test-apt-never-markauto-sections
index a1fc87389..85412b17b 100755
--- a/test/integration/test-apt-never-markauto-sections
+++ b/test/integration/test-apt-never-markauto-sections
@@ -20,16 +20,18 @@ buildsimplenativepackage 'browser' 'amd64' '42' 'unstable'
 buildsimplenativepackage 'texteditor' 'amd64' '1' 'stable'
 buildsimplenativepackage 'bad-texteditor' 'amd64' '1' 'stable' 'Depends: texteditor
 Conflicts: mydesktop-core'
-buildsimplenativepackage 'nosection' 'amd64' '1' 'stable' '' '' '<none>'
 buildsimplenativepackage 'foreignpkg' 'i386' '1' 'stable' 'Multi-Arch: foreign'
 setupaptarchive
 
-testsuccess aptcache show nosection
-testfailure grep 'Section' rootdir/tmp/testsuccess.output
-testempty aptmark showmanual
+insertinstalledpackage 'nosection' 'amd64' '1' '' '' '' '' '<none>'
 
+testsuccess aptmark auto nosection
+testempty aptmark showmanual
 testsuccess aptget install mydesktop -y -o Debug::pkgProblemResolver=1 -o Debug::pkgDepCache::Marker=1 -o Debug::pkgDepCache::AutoInstall=1
 
+testsuccess aptcache show nosection
+testfailure grep 'Section' rootdir/tmp/testsuccess.output
+
 testmarkedmanual 'mydesktop'
 testmarkedauto 'mydesktop-core' 'foreignpkg:i386' 'texteditor' 'browser' 'nosection'
 
diff --git a/test/integration/test-apt-progress-fd-error b/test/integration/test-apt-progress-fd-error
index 39c1053a1..ca2c2328f 100755
--- a/test/integration/test-apt-progress-fd-error
+++ b/test/integration/test-apt-progress-fd-error
@@ -19,7 +19,7 @@ setupaptarchive
 exec 3> apt-progress.log
 testfailure aptget install foo1 foo2 -y -o APT::Status-Fd=3
 msgtest 'Ensure correct error message' 'file-conflict'
-testsuccess --nomsg grep "foo2_0.8.15_[^.]\+.deb:[0-9.]\+:trying to overwrite '/usr/bin/file-conflict', which is also in package foo1 0.8.15" apt-progress.log
+testsuccess --nomsg grep "foo2_0.8.15_[^.]\+.deb:[0-9.]\+:trying to overwrite '/usr/bin/file-conflict', which is also in package foo1" apt-progress.log
 
 testsuccess test -s rootdir/var/crash/foo2.0.crash
 testsuccess grep '^Package: foo2 0.8.15$' rootdir/var/crash/foo2.0.crash