Add scenarios for install with destdir option set

dnf-behave-tests/dnf/install.feature

@@ -0,0 +1,42 @@
+@dnf5
+Feature: RPM installation tests
+
+Background: Set repositories
+Given I use repository "simple-base"
+
+# https://github.com/rpm-software-management/dnf5/issues/1620
+Scenario: Install an RPM with `destdir` option set
+ When I execute dnf with args "install labirinto --setopt=destdir={context.dnf.tempdir}/SomeDestination"
+ Then the exit code is 0
+ And Transaction is following
+ | Action | Package |
+ | install | labirinto-0:1.0-1.fc29.x86_64 |
+ When I execute "find -type f -name '*.rpm'" in "{context.dnf.tempdir}/SomeDestination"
+ Then stdout is empty
+
+
+Scenario: RPMs downloaded with `keepcache` and `destdir` options set are not removed
+ When I execute dnf with args "install labirinto --setopt=destdir={context.dnf.tempdir}/SomeDestination --setopt=keepcache=true"
+ Then the exit code is 0
+ And Transaction is following
+ | Action | Package |
+ | install | labirinto-0:1.0-1.fc29.x86_64 |
+ When I execute "find -type f -name '*.rpm'" in "{context.dnf.tempdir}/SomeDestination"
+ Then stdout matches line by line
+ """
+ \./labirinto-1\.0-1\.fc29\.x86_64\.rpm
+ """
+
+
+Scenario: Install an RPM with `destdir` option set and `--downloadonly` switch works
+ When I execute dnf with args "install labirinto --setopt=destdir={context.dnf.tempdir}/SomeDestination --downloadonly"
+ Then the exit code is 0
+ And DNF Transaction is following
+ | Action | Package |
+ | install | labirinto-0:1.0-1.fc29.x86_64 |
+ And RPMDB Transaction is empty
+ When I execute "find -type f -name '*.rpm'" in "{context.dnf.tempdir}/SomeDestination"
+ Then stdout matches line by line
+ """
+ \./labirinto-1\.0-1\.fc29\.x86_64\.rpm
+ """