Add expectation class

src/spectator.cr

@@ -1,9 +1,5 @@
 require "./spectator/*"
 
-def expect(actual : T) forall T
-  pp actual
-end
-
 # TODO: Write documentation for `Spectator`
 module Spectator
   VERSION = "0.1.0"

src/spectator/expectation.cr

@@ -0,0 +1,12 @@
+def expect(actual : T) forall T
+  Spectator::Expectation.new(actual)
+end
+
+module Spectator
+  class Expectation(T)
+    getter actual : T
+
+    protected def initialize(@actual : T)
+    end
+  end
+end