Extend manual debuginfo test to cover the two other main scenarios

Debuginfo is traditionally disabled in packages by defining
%debug_package to %{nil}, but since 4.20 we support the more formal
%_enable_debug_packages switch too. Test that, and also that it fails
if both automatic and manual debuginfo is specified.

tests/data/SPECS/hello-debuginfo.spec

@@ -4,6 +4,8 @@
 # inspecting it's output. Everybody else should use a simple noarch
 # package which can be built under runroot in the test-suite.
 
+%bcond customdebug 1
+
 Summary: hello -- hello, world rpm
  Name: hello
 Version: 1.0
@@ -16,7 +18,10 @@ URL: http://rpm.org
 	Source0: hello-1.0.tar.gz
  Patch0: hello-1.0-modernize.patch
 Prefix: /usr
+
+%if %{with customdebug}
 %global debug_package %{nil}
+%endif
 
 %description
 Simple rpm demonstration.

tests/rpmbuild.at

@@ -2460,6 +2460,27 @@ runroot rpm -qpl /build/RPMS/*/hello-debuginfo-1.0-1.*.rpm
 /usr/lib/debug/test.txt
 ],
 [ignore])
+
+RPMTEST_CHECK([
+runroot rpmbuild --quiet -bb \
+		--define "_prefix /usr/local" \
+		--without customdebug \
+		--define "_enable_debug_packages 0" \
+		/data/SPECS/hello-debuginfo.spec
+],
+[0],
+[ignore],
+[ignore])
+
+RPMTEST_CHECK([
+runroot rpmbuild --quiet -bb \
+		--define "_prefix /usr/local" \
+		--without customdebug \
+		/data/SPECS/hello-debuginfo.spec
+],
+[1],
+[ignore],
+[ignore])
 RPMTEST_CLEANUP
 
 AT_SETUP([explicit %_enable_debug_package on noarch])