Buddy likes magic too! BDD FTW!

I was able to get tests going with a similar test.hxml for Buddy:

-main TestMain
-cp tests
-cp source
-cp C:/HaxeToolkit/haxe/lib/flixel/git
-D flixel=3.3.12
-cp C:/HaxeToolkit/haxe/lib/openfl/3,6,0
-D openfl=3.6.0
-cp C:/HaxeToolkit/haxe/lib/lime/2,9,0
-D lime=2.9.0
-cp C:/HaxeToolkit/haxe/lib/buddy/0,18,1
-D buddy=0.18.1
-cp C:/HaxeToolkit/haxe/lib/promhx/1,0,21/src/main
-D promhx=1.0.21
-cp C:\HaxeToolkit\haxe\lib\openfl/3,6,0/extern
--times
-D reporter=buddy.reporting.TraceReporter
-D native-trace
-D openfl-next
-D tools=2.9.0
-D flash-use-stage
-D no-compilation
-D openfl-flash
-D fdb-ci
-D web
--macro flixel.system.macros.FlxDefines.run()
-swf-lib export/flash/obj/assets.swf
-swf-version 11.8
-swf export/test/flash/bin/buddyhftest.swf
-swf-header 640:480:60:000000
-cp export/flash/haxe
-debug

All that was then needed was the same magic line, just in the new() of the Tests class.  And also a bit of trace redirection.  As ciscoheat says, enjoy your new Buddy!