test(lua): add import 'diamond' tst

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

tests/lua/mod5.lua

@@ -0,0 +1,56 @@
+local NumThreads=4
+
+function mod_name(midx)
+   return tostring("mod5_mod" .. tostring(midx))
+end
+
+function const_name(midx)
+   return "mod" .. tostring(midx) .. "C"
+end
+
+function mk_module(midx, imports)
+   local imp_names = {}
+   for i = 1, #imports do
+      imp_names[#imp_names + 1] = mod_name(imports[i])
+   end
+   local env   = import_modules(imp_names, NumThreads)
+   if #imports == 0 then
+      env = add_decl(env, mk_var_decl(const_name(midx), Bool))
+      env = add_decl(env, mk_var_decl("and", mk_arrow(Bool, Bool, Bool)))
+   elseif #imports == 1 then
+      env = add_decl(env, mk_definition(const_name(midx), Bool, Const(const_name(imports[1]))))
+   else
+      local And = Const("and")
+      env = add_decl(env, mk_definition(const_name(midx), Bool, And(Const(const_name(imports[1])), Const(const_name(imports[2])))))
+   end
+   env:export(tostring(mod_name(midx)) .. ".olean")
+end
+
+local NumMods = 100
+
+function mk_modules()
+   mk_module(0, {})
+   local i = 1
+   local j = 1
+   while i <= NumMods do
+      if j % 2 == 0 then
+         mk_module(i, {i-1, i-2})
+         i = i + 1
+      else
+         mk_module(i,   {i-1})
+         mk_module(i+1, {i-i})
+         i = i + 2
+      end
+      j = j + 1
+   end
+end
+
+mk_modules()
+local env = import_modules(mod_name(NumMods))
+env:for_each(function(d)
+                print(d:name())
+             end
+)
+for i = 1, NumMods do
+   assert(env:get(const_name(i)):is_definition())
+end