compose.js: Add test for validate_stream_message_address_info().
compose.js: Add test for validate_stream_message_address_info().

In this commit we only add a single test for the case of subscribed
stream to validate_stream_message_address_info() function.

brainwane/zulip,dhcrzf/zulip,andersk/zulip,vabs22/zulip,showell/zulip,andersk/zulip,eeshangarg/zulip,synicalsyntax/zulip,jrowan/zulip,punchagan/zulip,jackrzhang/zulip,mahim97/zulip,rht/zulip,vabs22/zulip,kou/zulip,rishig/zulip,tommyip/zulip,rht/zulip,eeshangarg/zulip,jackrzhang/zulip,punchagan/zulip,punchagan/zulip,rishig/zulip,synicalsyntax/zulip,brainwane/zulip,verma-varsha/zulip,zulip/zulip,verma-varsha/zulip,brainwane/zulip,jrowan/zulip,shubhamdhama/zulip,tommyip/zulip,shubhamdhama/zulip,zulip/zulip,andersk/zulip,eeshangarg/zulip,jrowan/zulip,timabbott/zulip,jrowan/zulip,andersk/zulip,rht/zulip,jrowan/zulip,tommyip/zulip,brainwane/zulip,showell/zulip,kou/zulip,brainwane/zulip,kou/zulip,jackrzhang/zulip,hackerkid/zulip,jackrzhang/zulip,rishig/zulip,zulip/zulip,mahim97/zulip,Galexrt/zulip,vaidap/zulip,timabbott/zulip,showell/zulip,dhcrzf/zulip,shubhamdhama/zulip,vaidap/zulip,synicalsyntax/zulip,vaidap/zulip,eeshangarg/zulip,hackerkid/zulip,verma-varsha/zulip,punchagan/zulip,vabs22/zulip,amanharitsh123/zulip,rht/zulip,hackerkid/zulip,tommyip/zulip,mahim97/zulip,rishig/zulip,vaidap/zulip,Galexrt/zulip,hackerkid/zulip,Galexrt/zulip,tommyip/zulip,synicalsyntax/zulip,amanharitsh123/zulip,brockwhittaker/zulip,andersk/zulip,eeshangarg/zulip,dhcrzf/zulip,brainwane/zulip,dhcrzf/zulip,mahim97/zulip,shubhamdhama/zulip,zulip/zulip,rishig/zulip,showell/zulip,zulip/zulip,zulip/zulip,Galexrt/zulip,vaidap/zulip,brainwane/zulip,synicalsyntax/zulip,rht/zulip,jackrzhang/zulip,hackerkid/zulip,vaidap/zulip,vabs22/zulip,jackrzhang/zulip,rht/zulip,amanharitsh123/zulip,tommyip/zulip,tommyip/zulip,zulip/zulip,verma-varsha/zulip,timabbott/zulip,shubhamdhama/zulip,dhcrzf/zulip,rht/zulip,vabs22/zulip,amanharitsh123/zulip,brockwhittaker/zulip,brockwhittaker/zulip,verma-varsha/zulip,showell/zulip,showell/zulip,verma-varsha/zulip,kou/zulip,kou/zulip,synicalsyntax/zulip,punchagan/zulip,brockwhittaker/zulip,Galexrt/zulip,amanharitsh123/zulip,punchagan/zulip,kou/zulip,hackerkid/zulip,Galexrt/zulip,timabbott/zulip,showell/zulip,hackerkid/zulip,dhcrzf/zulip,rishig/zulip,mahim97/zulip,timabbott/zulip,amanharitsh123/zulip,dhcrzf/zulip,timabbott/zulip,jrowan/zulip,kou/zulip,mahim97/zulip,brockwhittaker/zulip,shubhamdhama/zulip,punchagan/zulip,andersk/zulip,shubhamdhama/zulip,jackrzhang/zulip,rishig/zulip,brockwhittaker/zulip,eeshangarg/zulip,vabs22/zulip,timabbott/zulip,andersk/zulip,synicalsyntax/zulip,eeshangarg/zulip,Galexrt/zulip