fix works in hashes with nested hashes

lib/rspec/support/differ.rb

@@ -61,8 +61,15 @@ def diff_as_string(actual, expected)
       # rubocop:enable Metrics/MethodLength
 
       def diff_as_object_with_anything(actual, expected)
-        expected.select { |_, v| RSpec::Mocks::ArgumentMatchers::AnyArgMatcher === v }.each_key do |k|
-          expected[k] = actual[k]
+        @keys_with_anything.each do |keys|
+          pointer_expected = expected
+          pointer_actual = actual
+          final_key = keys.pop
+          keys.each do |k|
+            pointer_expected = pointer_expected[k]
+            pointer_actual = pointer_actual[k]
+          end
+          pointer_expected[final_key] = pointer_actual[final_key]
         end
         diff_as_object(actual, expected)
       end
@@ -85,7 +92,26 @@ def initialize(opts={})
     private
 
       def hash_with_anything?(arg)
-        safely_flatten(arg).any? { |a| RSpec::Mocks::ArgumentMatchers::AnyArgMatcher === a }
+        @keys_with_anything = recursive_get_keys(arg)
+        @keys_with_anything.any?
+      end
+
+      def recursive_get_keys(hash)
+        klass = RSpec::Mocks::ArgumentMatchers::AnyArgMatcher
+        hash.reduce([]) do |acc, pair|
+          if klass === pair[1]
+            acc << [pair[0]]
+          else
+            if Hash === pair[1]
+              keys = recursive_get_keys(pair[1])
+              keys.each do |key|
+                key.prepend pair[0]
+                acc << key
+              end
+            end
+          end
+          acc
+        end
       end
 
       def no_procs?(*args)

spec/rspec/support/differ_spec.rb

@@ -572,6 +572,54 @@ def inspect; "<BrokenObject>"; end
             EOD
             expect(diff).to be_diffed_as(expected_diff)
           end
+
+          context "with nested hash" do
+            it "outputs only key value pair that triggered diff, anything_key should absorb actual value" do
+              actual = { :an_key => "dummy", :fixed => "fixed", :nested => { :name => "foo", :trigger => "trigger", :anything_key => "bcdd0399-1cfe-4de1-a481-ca6b17d41ed8" } }
+              expected = { :an_key => anything, :fixed => "fixed", :nested => { :name => "foo", :trigger => "wrong", :anything_key => anything } }
+              diff = differ.diff(actual, expected)
+              expected_diff = dedent(<<-'EOD')
+                |
+                |@@ -1,4 +1,4 @@
+                | :an_key => "dummy",
+                | :fixed => "fixed",
+                |-:nested => {:anything_key=>"bcdd0399-1cfe-4de1-a481-ca6b17d41ed8", :name=>"foo", :trigger=>"wrong"},
+                |+:nested => {:anything_key=>"bcdd0399-1cfe-4de1-a481-ca6b17d41ed8", :name=>"foo", :trigger=>"trigger"},
+                |
+              EOD
+              expect(diff).to be_diffed_as(expected_diff)
+            end
+          end
+
+          context "with nested hash and subnested hash" do
+            it "outputs only key value pair that triggered diff, anything_key should absorb actual value" do
+              actual = {
+                :an_key => "dummy", :fixed => "fixed",
+                :nested => {
+                  :nested_anything_key => "9930ddcb-1cfe-4de1-a481-ca6b17d41ed8",
+                  :subnested => { :name => "foo", :trigger => "trigger", :subnested_anything_key => "bcdd0399-1cfe-4de1-a481-ca6b17d41ed8" }
+                }
+              }
+              expected = {
+                :an_key => anything, :fixed => "fixed",
+                :nested => {
+                  :nested_anything_key => anything,
+                  :subnested => { :name => "foo", :trigger => "wrong", :subnested_anything_key => anything }
+                }
+              }
+              diff = differ.diff(actual, expected)
+              expected_diff = dedent(<<-'EOD')
+                |
+                |@@ -1,4 +1,4 @@
+                | :an_key => "dummy",
+                | :fixed => "fixed",
+                |-:nested => {:nested_anything_key=>"9930ddcb-1cfe-4de1-a481-ca6b17d41ed8", :subnested=>{:name=>"foo", :subnested_anything_key=>"bcdd0399-1cfe-4de1-a481-ca6b17d41ed8", :trigger=>"wrong"}},
+                |+:nested => {:nested_anything_key=>"9930ddcb-1cfe-4de1-a481-ca6b17d41ed8", :subnested=>{:name=>"foo", :subnested_anything_key=>"bcdd0399-1cfe-4de1-a481-ca6b17d41ed8", :trigger=>"trigger"}},
+                |
+              EOD
+              expect(diff).to be_diffed_as(expected_diff)
+            end
+          end
         end
       end
     end