Fix bug in tests

Author: BenLauwens

test/containers.jl

@@ -1,5 +1,3 @@
-workspace()
-
 using SimJulia
 using ResumableFunctions
 

test/runtests.jl

@@ -11,6 +11,7 @@ for test_file in [
   "coroutines.jl",
   "containers.jl",
   "stores.jl",
-  "continuous.jl",]
+  "continuous.jl",
+  ]
   include(testpath(test_file))
 end

test/simulations.jl

@@ -21,17 +21,17 @@ catch exc
   println("$exc has been thrown!")
 end
 sim = Simulation(3)
-start = now(sim)
+start_time = now(sim)
 @callback test_callback(Timeout(sim, 1))
-run(sim, start+2)
-println(now(sim)-start)
+run(sim, start_time+2)
+println(now(sim)-start_time)
 sim = Simulation()
-start = now(sim)
+start_time = now(sim)
 ev = Event(sim)
 @callback test_callback_exception(ev)
 succeed(ev)
 try
   run(sim)
 catch exc
-  println("$exc has been thrown after $(now(sim)-start)!")
+  println("$exc has been thrown after $(now(sim)-start_time)!")
 end