ci: Travis: test with Lua 5.3 also (neovim#41)

* ci: Travis: test with Lua 5.3 also

* test/stdio_fixture.lua: pass package.{path,cpath} via args

Ref: neovim/neovim@4df38ec9d

Author: blueyed

.travis.yml

@@ -21,6 +21,11 @@ env:
     # (which is run before after_success).
     - SUCCESS_MARKER="$TRAVIS_BUILD_DIR/.tests_successful"
 
+matrix:
+  include:
+    - env: LUA_URL=https://www.lua.org/ftp/lua-5.1.5.tar.gz
+    - env: LUA_URL=https://www.lua.org/ftp/lua-5.3.5.tar.gz
+
 script:         .ci/script.sh
 before_cache:   .ci/before_cache.sh
 

test/session_spec.lua

@@ -249,7 +249,7 @@ describe('stdio', function()
   it('sends and receive data through stdout/stdin', function()
     local proc_stream = ChildProcessStream.spawn({
       arg[i_min],
-      'test/stdio_fixture.lua'
+      'test/stdio_fixture.lua', package.path, package.cpath
     })
     local session = Session.new(proc_stream)
     session:notify('a', 0, 1)

test/stdio_fixture.lua

@@ -1,15 +1,8 @@
-local deps_prefix = './.deps/usr'
-if os.getenv('DEPS_PREFIX') then
-  deps_prefix = os.getenv('DEPS_PREFIX')
-end
-package.path =
-     deps_prefix
-  .. '/share/lua/5.1/?.lua;' .. deps_prefix .. '/share/lua/5.1/?/init.lua;'
-  .. package.path
-package.cpath =
-     deps_prefix
-  .. '/lib/lua/5.1/?.so;'
-  .. package.cpath
+--- stdio test fixture / program.
+--
+-- Lua's paths are passed as arguments to reflect the path in the test itself.
+package.path = arg[1]
+package.cpath = arg[2]
 local assert = require("luassert")
 
 local StdioStream = require('nvim.stdio_stream')