has.rb in opal-rspec-1.0.0.alpha1

- old
+ new

@@ -1,15 +1,18 @@
 module RSpec
   module Matchers
     module BuiltIn
       # @api private
-      # Provides the implementation for `has_<predicate>`.
-      # Not intended to be instantiated directly.
-      class Has < BaseMatcher
+      # Provides the implementation for dynamic predicate matchers.
+      # Not intended to be inherited directly.
+      class DynamicPredicate < BaseMatcher
+        include BeHelpers
+
         def initialize(method_name, *args, &block)
           @method_name, @args, @block = method_name, args, block
         end
+        ruby2_keywords :initialize if respond_to?(:ruby2_keywords, true)
 
         # @private
         def matches?(actual, &block)
           @actual = actual
           @block ||= block
@@ -18,83 +21,146 @@
 
         # @private
         def does_not_match?(actual, &block)
           @actual = actual
           @block ||= block
-          predicate_accessible? && !predicate_matches?
+          predicate_accessible? && predicate_matches?(false)
         end
 
         # @api private
         # @return [String]
         def failure_message
-          validity_message || "expected ##{predicate}#{failure_message_args_description} to return true, got false"
+          failure_message_expecting(true)
         end
 
         # @api private
         # @return [String]
         def failure_message_when_negated
-          validity_message || "expected ##{predicate}#{failure_message_args_description} to return false, got true"
+          failure_message_expecting(false)
         end
 
         # @api private
         # @return [String]
         def description
-          [method_description, args_description].compact.join(' ')
+          "#{method_description}#{args_to_sentence}"
         end
 
       private
 
         def predicate_accessible?
-          !private_predicate? && predicate_exists?
+          @actual.respond_to? predicate
         end
 
         # support 1.8.7, evaluate once at load time for performance
         if String === methods.first
+          # :nocov:
           def private_predicate?
             @actual.private_methods.include? predicate.to_s
           end
+          # :nocov:
         else
           def private_predicate?
             @actual.private_methods.include? predicate
           end
         end
 
-        def predicate_exists?
-          @actual.respond_to? predicate
+        def predicate_result
+          @predicate_result = actual.__send__(predicate_method_name, *@args, &@block)
         end
 
-        def predicate_matches?
-          @actual.__send__(predicate, *@args, &@block)
+        def predicate_method_name
+          predicate
         end
 
-        def predicate
+        def predicate_matches?(value=true)
+          if RSpec::Expectations.configuration.strict_predicate_matchers?
+            value == predicate_result
+          else
+            value == !!predicate_result
+          end
+        end
+
+        def root
           # On 1.9, there appears to be a bug where String#match can return `false`
           # rather than the match data object. Changing to Regex#match appears to
           # work around this bug. For an example of this bug, see:
           # https://travis-ci.org/rspec/rspec-expectations/jobs/27549635
-          @predicate ||= :"has_#{Matchers::HAS_REGEX.match(@method_name.to_s).captures.first}?"
+          self.class::REGEX.match(@method_name.to_s).captures.first
         end
 
         def method_description
-          @method_name.to_s.gsub('_', ' ')
+          EnglishPhrasing.split_words(@method_name)
         end
 
-        def args_description
-          return nil if @args.empty?
-          @args.map { |arg| arg.inspect }.join(', ')
+        def failure_message_expecting(value)
+          validity_message ||
+            "expected `#{actual_formatted}.#{predicate}#{args_to_s}` to #{expectation_of value}, got #{description_of @predicate_result}"
         end
 
-        def failure_message_args_description
-          desc = args_description
-          "(#{desc})" if desc
+        def expectation_of(value)
+          if RSpec::Expectations.configuration.strict_predicate_matchers?
+            "return #{value}"
+          elsif value
+            "be truthy"
+          else
+            "be falsey"
+          end
         end
 
         def validity_message
+          return nil if predicate_accessible?
+
+          "expected #{actual_formatted} to respond to `#{predicate}`#{failure_to_respond_explanation}"
+        end
+
+        def failure_to_respond_explanation
           if private_predicate?
-            "expected #{@actual} to respond to `#{predicate}` but `#{predicate}` is a private method"
-          elsif !predicate_exists?
-            "expected #{@actual} to respond to `#{predicate}`"
+            " but `#{predicate}` is a private method"
           end
+        end
+      end
+
+      # @api private
+      # Provides the implementation for `has_<predicate>`.
+      # Not intended to be instantiated directly.
+      class Has < DynamicPredicate
+        # :nodoc:
+        REGEX = Matchers::HAS_REGEX
+      private
+        def predicate
+          @predicate ||= :"has_#{root}?"
+        end
+      end
+
+      # @api private
+      # Provides the implementation of `be_<predicate>`.
+      # Not intended to be instantiated directly.
+      class BePredicate < DynamicPredicate
+        # :nodoc:
+        REGEX = Matchers::BE_PREDICATE_REGEX
+      private
+        def predicate
+          @predicate ||= :"#{root}?"
+        end
+
+        def predicate_method_name
+          actual.respond_to?(predicate) ? predicate : present_tense_predicate
+        end
+
+        def failure_to_respond_explanation
+          super || if predicate == :true?
+                     " or perhaps you meant `be true` or `be_truthy`"
+                   elsif predicate == :false?
+                     " or perhaps you meant `be false` or `be_falsey`"
+                   end
+        end
+
+        def predicate_accessible?
+          super || actual.respond_to?(present_tense_predicate)
+        end
+
+        def present_tense_predicate
+          :"#{root}s?"
         end
       end
     end
   end
 end