Allow passing predefined stubs in as keyword args

src/spectator/dsl/mocks.cr

@@ -95,7 +95,7 @@ module Spectator::DSL
  found_tuple = found_tuples.last %}
 
       {% if found_tuple %}
-        {{found_tuple[2].id}}.new
+        {{found_tuple[2].id}}.new({{**value_methods}})
       {% else %}
         ::Spectator::LazyDouble.new({{name}}, {{**value_methods}})
       {% end %}

src/spectator/mocks/double.cr

@@ -4,6 +4,7 @@ require "./stub"
 require "./stubbable"
 require "./stubbed_name"
 require "./unexpected_message"
+require "./value_stub"
 
 module Spectator
   # Stands in for an object for testing that a SUT calls expected methods.
@@ -76,6 +77,15 @@ module Spectator
     def initialize(@stubs : Array(Stub) = [] of Stub)
     end
 
+    # Creates the double.
+    #
+    # An initial set of stubs can be provided with *value_methods*.
+    def initialize(**value_methods)
+      @stubs = value_methods.map do |key, value|
+        ValueStub.new(key, value).as(Stub)
+      end
+    end
+
     # Compares against another object.
     #
     # Always returns false.