Use koan assertions to fail the tests

lib/koans.ex

@@ -14,12 +14,8 @@ defmodule Koans do
       end
 
       def unquote(compiled_name)(answer) do
-        try do
+        unquote(mangled_body)
-          unquote(mangled_body)
+        :ok
-          :ok
-        rescue
-          e in _ -> e
-        end
       end
     end
   end

test/koans_harness_test.exs

@@ -8,7 +8,7 @@ defmodule KoansHarnessTest do
                1,
                :something]
 
-    assert test_all(Equalities, answers) == :all_passed
+    test_all(Equalities, answers)
   end
 
   test "Lists" do
@@ -31,23 +31,16 @@ defmodule KoansHarnessTest do
                [{1, 3, 5}, {2, 4, 6}]
                ]
 
-    assert test_all(Lists, answers) == :all_passed
+    test_all(Lists, answers)
   end
 
   def test_all(module, answers) do
     module.all_koans
     |> Enum.zip(answers)
     |> run_all(module)
-    |> passed?
-    |> results
   end
 
   def run_all(pairs, module) do
     Enum.map(pairs, fn ({koan, answer}) -> Runner.run_koan(module, koan, [answer]) end)
   end
-
-  def passed?(answers), do: {Enum.all?(answers, fn(element) -> element == :passed end), answers}
-
-  def results({true, _}), do: :all_passed
-  def results({false, answers}), do: answers
 end