Use a method to create the matcher

Author: tjallingvanderwal

README.md

@@ -279,7 +279,7 @@ expect(double).to receive(:msg).with(hash_including(:a => 5)) # first arg is a h
 expect(double).to receive(:msg).with(array_including(5)) # first arg is an array with 5 as one of the key-values
 expect(double).to receive(:msg).with(hash_excluding(:a => 5)) # first arg is a hash without a: 5 as one of the key-values
 expect(double).to receive(:msg).with(start_with('a')) # any matcher, custom or from rspec-expectations
-expect(double).to receive(:msg).with(satisfy{|data| data.dig(:a, :b, :c) == 5 }) # any expectation
+expect(double).to receive(:msg).with(satisfy { |data| data.dig(:a, :b, :c) == 5 }) # assert anything you want
 ```
 
 ## Receive Counts

features/setting_constraints/matching_arguments.feature

@@ -77,18 +77,18 @@ Feature: Matching arguments
       """ruby
       RSpec.describe "Using satisfy for complex custom expecations" do
         let(:dbl) { double }
-        before do
-          expectation = satisfy do |data|
-            data[:a][:b][:c] == 5
-          end
-          expect(dbl).to receive(:foo).with(expectation)
+
+        def a_b_c_equals_5
+          satisfy { |data| data[:a][:b][:c] == 5 }
         end
 
         it "passes when the expectation is true" do
+          expect(dbl).to receive(:foo).with(a_b_c_equals_5)
           dbl.foo(a: { b: { c: 5 } })
         end
 
         it "fails when the expectation is false" do
+          expect(dbl).to receive(:foo).with(a_b_c_equals_5)
           dbl.foo(a: { b: { c: 3 } })
         end
       end