mvn install Error

[lualiliu]

When I run mvn install , I get error likes:

Tests run: 3, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 34.517 sec <<< FAILURE! - in org.flathub.api.service.ApiServiceImplTest
findAllApps(org.flathub.api.service.ApiServiceImplTest) Time elapsed: 1.232 sec <<< FAILURE!
java.lang.AssertionError:
Expecting actual not to be empty
at org.flathub.api.service.ApiServiceImplTest.findAllApps(ApiServiceImplTest.java:37)

can you help me?

this is my environment and process:

0 oracle jdk8 and mvn 3.6
1 git clone project https://github.com/flathub/linux-store-backend and https://github.com/jgarciao/appstream-appdata-java
2 jump to appstream-appdata-java and run mvn install
3 flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
4 In linux-store-backend run bash scripts/appstream-extractor.sh
5 In linux-store-backend run mvn install