add cargo-test

It's same as we would be running in %check.

Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>

cargo-test/runtest.sh

@@ -0,0 +1,32 @@
+#!/bin/bash -euf
+
+dnf -y --best install rust-packaging
+dnf -y --best --nogpgcheck --repo="test-$pkg" install "$pkg-devel"
+
+provides=$(rpm -qP "$pkg-devel")
+
+while read -r prv; do
+  if [[ "$prv" =~ ^crate\(([^/]+)\)\ \=\ ([0-9]\.[0-9]\.[0-9]) ]]; then
+    crate="${BASH_REMATCH[1]}"
+    version="${BASH_REMATCH[2]}"
+  fi
+done <<< "$provides"
+
+echo "$crate ($version)"
+
+cargo_registry=$(rpm --eval "%{cargo_registry}")
+crate_dir="$cargo_registry/$crate-$version"
+crate_toml="$crate_dir/Cargo.toml"
+
+# XXX: ideally we should just install -tests subpackage
+# which would require all necessary deps
+eval $(rpm --eval "%{__cargo_inspector}") --test-requires "$crate_toml" | \
+  sed -r -e "s/(.*)/'\1'/" | xargs sudo dnf -y install
+
+# XXX: sed is needed due to https://github.com/rpm-software-management/rpm/issues/472
+rpm -D "_with_check 1" --eval "%cargo_prep" | \
+  sed -r -e "s/%if (.+)/if [ \1 ]; then/;s/%endif/fi/" -e "s/<< EOF/<< 'EOF'/" > prep.sh
+# XXX: We can't run eval directly, so source it
+source prep.sh
+
+exec cargo test --manifest-path "$crate_toml" "$@"