tests: Add node test for compose.needs_subscribe_warning.
tests: Add node test for compose.needs_subscribe_warning.

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