tests: Add coverage to get_service_interface_class().
tests: Add coverage to get_service_interface_class().

punchagan/zulip,shubhamdhama/zulip,shubhamdhama/zulip,showell/zulip,punchagan/zulip,showell/zulip,hackerkid/zulip,jackrzhang/zulip,zulip/zulip,timabbott/zulip,punchagan/zulip,zulip/zulip,timabbott/zulip,jackrzhang/zulip,rishig/zulip,kou/zulip,synicalsyntax/zulip,synicalsyntax/zulip,synicalsyntax/zulip,punchagan/zulip,rishig/zulip,showell/zulip,hackerkid/zulip,rht/zulip,andersk/zulip,timabbott/zulip,shubhamdhama/zulip,rht/zulip,zulip/zulip,rishig/zulip,rht/zulip,jackrzhang/zulip,rishig/zulip,andersk/zulip,dhcrzf/zulip,rht/zulip,dhcrzf/zulip,hackerkid/zulip,kou/zulip,brainwane/zulip,timabbott/zulip,andersk/zulip,synicalsyntax/zulip,timabbott/zulip,brainwane/zulip,kou/zulip,jackrzhang/zulip,timabbott/zulip,eeshangarg/zulip,hackerkid/zulip,brainwane/zulip,tommyip/zulip,shubhamdhama/zulip,dhcrzf/zulip,shubhamdhama/zulip,eeshangarg/zulip,rishig/zulip,tommyip/zulip,kou/zulip,dhcrzf/zulip,zulip/zulip,dhcrzf/zulip,tommyip/zulip,showell/zulip,rishig/zulip,rht/zulip,synicalsyntax/zulip,tommyip/zulip,jackrzhang/zulip,andersk/zulip,brainwane/zulip,eeshangarg/zulip,hackerkid/zulip,punchagan/zulip,kou/zulip,punchagan/zulip,dhcrzf/zulip,rht/zulip,showell/zulip,brainwane/zulip,shubhamdhama/zulip,andersk/zulip,eeshangarg/zulip,andersk/zulip,rht/zulip,hackerkid/zulip,jackrzhang/zulip,jackrzhang/zulip,synicalsyntax/zulip,synicalsyntax/zulip,tommyip/zulip,eeshangarg/zulip,tommyip/zulip,shubhamdhama/zulip,eeshangarg/zulip,rishig/zulip,zulip/zulip,eeshangarg/zulip,dhcrzf/zulip,kou/zulip,showell/zulip,andersk/zulip,tommyip/zulip,kou/zulip,hackerkid/zulip,brainwane/zulip,punchagan/zulip,brainwane/zulip,zulip/zulip,zulip/zulip,timabbott/zulip,showell/zulip