Backported fix for 0 runtime handling from #168

.tool-versions

@@ -1,2 +1,2 @@
-elixir 1.6.0-rc.0
+elixir 1.6.0-rc.1
 erlang 20.2

lib/benchee/benchmark/runner.ex

@@ -101,7 +101,7 @@ defmodule Benchee.Benchmark.Runner do
   end
 
   defp measure_runtimes(scenario, context, run_time, fast_warning)
-  defp measure_runtimes(scenario, _, 0, _), do: scenario
+  defp measure_runtimes(_, _, 0, _), do: []
   defp measure_runtimes(scenario, scenario_context, run_time, fast_warning) do
     end_time = current_time() + run_time
     :erlang.garbage_collect

test/benchee/benchmark/runner_test.exs

@@ -165,6 +165,16 @@ defmodule Benchee.Benchmark.RunnerTest do
       refute_receive :called
     end
 
+    test "run times of the scenarios are empty when nothing runs" do
+      %{scenarios: [scenario]} = 
+        %Suite{configuration: %{time: 0, warmup: 0}}
+        |> test_suite
+        |> Benchmark.benchmark("don't care", fn -> 0 end)
+        |> Benchmark.measure(TestPrinter)
+
+      assert scenario.run_times == []
+    end
+
     @no_input Benchmark.no_input()
     test "asks to print what is currently benchmarking" do
       test_suite()