Minimal handling of expectations and failures

src/spectator/example.cr

@@ -5,6 +5,8 @@ module Spectator
 
     def run
       @block.call
+    rescue ex : ExpectationFailedError
+      puts ex
     end
   end
 end

src/spectator/expectation.cr

@@ -1,3 +1,5 @@
+require "./matchers/matcher"
+
 def expect(actual : T) forall T
   Spectator::Expectation.new(actual)
 end
@@ -8,5 +10,11 @@ module Spectator
 
     protected def initialize(@actual : T)
     end
+
+    def to(matcher : Matchers::Matcher)
+      unless matcher.match?(self)
+        raise ExpectationFailedError.new
+      end
+    end
   end
 end

src/spectator/expectation_failed_error.cr

@@ -0,0 +1,4 @@
+module Spectator
+  class ExpectationFailedError < Exception
+  end
+end