Add support for using busted 2.0 to run automation tests

Supply a definition of socket.gettime() to remove the dependency on
LuaSocket, as installing binary deps from luarocks doesn't work with a
custom build of luajit.

.travis.yml

@@ -10,7 +10,7 @@ before_install:
   - sudo pip install cpp-coveralls
 install:
   - sudo apt-get install -y -qq libasound2-dev libfftw3-dev libhunspell-dev yasm libfribidi-dev libass-dev libffms2-dev libwxgtk3.0-dev libicu-dev luarocks
-  - sudo luarocks install busted 1.10.0 > /dev/null
+  - sudo luarocks install busted > /dev/null
   - sudo luarocks install moonscript > /dev/null
   - sudo luarocks install uuid > /dev/null
 

automation/Makefile

@@ -19,7 +19,7 @@ aegisub-lua_LIBS := $(LIBS_WX) $(LIBS_BOOST) $(LIBS_ICU)
 PROGRAM += $(d)aegisub-lua
 
 test-automation: $(PROGRAM)
-	eval `luarocks path`; cd $(TOP)automation; LUA=./aegisub-lua busted -p 'moon' tests/modules
+	eval `luarocks path`; cd $(TOP)automation; ./aegisub-lua tests/busted.lua -p 'moon' tests/modules
 
 test: test-automation
 

automation/tests/busted.lua

@@ -1 +1,22 @@
-require 'busted.runner'({ batch = true })
+local ffi = require("ffi")
+
+ffi.cdef[[
+  typedef struct timeval {
+    long tv_sec;
+    long tv_usec;
+  } timeval;
+
+  int gettimeofday(timeval *t, void *tzp);
+]]
+
+-- busted depends on luasocket just for gettime(), so just supply a definition
+-- of that to avoid the dep
+package.loaded['socket'] = {
+  gettime = function()
+    local t = ffi.new("timeval")
+    ffi.C.gettimeofday(t, nil)
+    return tonumber(t.tv_sec) + tonumber(t.tv_usec) / 1000000.0
+  end
+}
+
+require 'busted.runner'({ batch = true, standalone = false })