tests: Check appdata name parsing via flatpak info

Add a basic test for the extraction of appdata name and summary values
that are displayed in the flatpak UI. Also use the new developer name
syntax in the test app. This tests the fix made in previous commit.

tests/make-test-app.sh

@@ -130,6 +130,9 @@ cat <<EOF > ${DIR}/files/share/metainfo/${APP_ID}.metainfo.xml
     <name>Hello world test app: $APP_ID</name>
     <summary>Print a greeting</summary>
     <description><p>This is a test app.</p></description>
+    <developer>
+      <name>Developer name</name>
+    </developer>
     <categories>
       <category>Utility</category>
     </categories>

tests/test-info.sh

@@ -6,7 +6,7 @@ set -euo pipefail
 
 skip_revokefs_without_fuse
 
-echo "1..8"
+echo "1..9"
 
 INCLUDE_SPECIAL_CHARACTER=1 setup_repo
 install_repo
@@ -62,3 +62,9 @@ ${FLATPAK} info --file-access=home org.test.Hello > info
 assert_file_has_content info "^hidden$"
 
 ok "info --file-access"
+
+${FLATPAK} info org.test.Hello > info
+
+assert_file_has_content info "^Hello world test app: org\.test\.Hello - Print a greeting$"
+
+ok "info (name header)"