Koans about processes including infrastructure.

lib/blank_assertions.ex

@@ -1,4 +1,6 @@
 defmodule BlankAssertions do
+  require ExUnit.Assertions
+
   defmacro assert(expr) do
     if contains_blank?(expr) do
       code = Macro.escape(expr)
@@ -25,6 +27,19 @@ defmodule BlankAssertions do
     end
   end
 
+  defmacro assert_receive(expr) do
+    if contains_blank?(expr) do
+      code = Macro.escape(expr)
+      quote do
+        raise ExUnit.AssertionError, expr: unquote(code)
+      end
+    else
+      quote do
+        ExUnit.Assertions.assert_receive(unquote(expr), 100)
+      end
+    end
+  end
+
   def assert(value, opts) do
     ExUnit.Assertions.assert(value, opts)
   end
@@ -33,6 +48,10 @@ defmodule BlankAssertions do
     ExUnit.Assertions.refute(value, opts)
   end
 
+  def flunk(message \\ "Flunked!") do
+    assert false, message: message
+  end
+
   defp contains_blank?(expr) do
     {_, blank} = Macro.prewalk(expr, false, &blank?/2)
     blank