Fix be_<predicate> to not support comparative chaining like be does.

lib/rspec/matchers/built_in/be.rb

@@ -45,7 +45,33 @@ def failure_message_for_should_not
         end
       end
 
+      module BeHelpers
+        private
+
+        def args_to_s
+          @args.empty? ? "" : parenthesize(inspected_args.join(', '))
+        end
+
+        def parenthesize(string)
+          "(#{string})"
+        end
+
+        def inspected_args
+          @args.collect{|a| a.inspect}
+        end
+
+        def expected_to_sentence
+          split_words(@expected)
+        end
+
+        def args_to_sentence
+          to_sentence(@args)
+        end
+      end
+
       class Be < BaseMatcher
+        include BeHelpers
+
         def initialize(*args, &block)
           @args = args
         end
@@ -67,28 +93,6 @@ def failure_message_for_should_not
             BeComparedTo.new(operand, operator)
           end
         end
-
-        private
-
-        def args_to_s
-          @args.empty? ? "" : parenthesize(inspected_args.join(', '))
-        end
-
-        def parenthesize(string)
-          "(#{string})"
-        end
-
-        def inspected_args
-          @args.collect{|a| a.inspect}
-        end
-
-        def expected_to_sentence
-          split_words(@expected)
-        end
-
-        def args_to_sentence
-          to_sentence(@args)
-        end
       end
 
       class BeComparedTo < Be
@@ -126,7 +130,9 @@ def negative_expectation_expression
         end
       end
 
-      class BePredicate < Be
+      class BePredicate < BaseMatcher
+        include BeHelpers
+
         def initialize(*args, &block)
           @expected = parse_expected(args.shift)
           @args = args

spec/rspec/matchers/be_spec.rb

@@ -56,6 +56,12 @@ def happy?
       expect(actual).to be_foo
     }.to raise_error(/aaaah/)
   end
+
+  it "does not support operator chaining like a basic `be` matcher does" do
+    matcher = be_happy
+    value = double(:happy? => false)
+    expect(be_happy == value).to be false
+  end
 end
 
 describe "expect(...).not_to be_predicate" do