Resembles any matches handles empty array

.gitignore

@@ -7,3 +7,4 @@
 /pkg/
 /spec/reports/
 /tmp/
+.rubocop-*

.rubocop.yml

@@ -0,0 +1,96 @@
+Rails:
+  Enabled: true
+
+AllCops:
+  DisplayCopNames: true
+  DisplayStyleGuide: true
+  TargetRailsVersion: 5.1
+  TargetRubyVersion: 2.5
+
+  Include:
+    - "**/Rakefile"
+    - "**/config.ru"
+  Exclude:
+    - "vendor/**/*"
+    - "spec/fixtures/**/*"
+    - "bin/**/*"
+    - "script/**/*"
+    - "node_modules/**/*"
+
+inherit_from:
+  - http://relaxed.ruby.style/rubocop.yml
+# Rules subject to debate
+Metrics/LineLength:
+  Max: 120
+
+Metrics/BlockLength:
+  ExcludedMethods:
+    - describe
+    - context
+    - it
+    - specify
+  Exclude:
+    - "lib/tasks/**/*"
+    - "config/routes.rb"
+Rails/Date:
+  Enabled: false
+Rails/TimeZone:
+  Enabled: false
+Rails/RelativeDateConstant:
+  Enabled: false
+Style/AndOr:
+  EnforcedStyle: conditionals
+Layout/CaseIndentation:
+  IndentOneStep: true
+Style/Documentation:
+  Enabled: false
+Style/EachWithObject:
+  Enabled: false
+Layout/ExtraSpacing:
+  Exclude:
+    - "config/routes.rb"
+Style/FrozenStringLiteralComment:
+  Enabled: true
+Style/HashSyntax:
+  Exclude:
+    - "lib/tasks/**/*"
+Layout/MultilineOperationIndentation:
+  EnforcedStyle: indented
+Style/NumericLiterals:
+  Enabled: true
+  Exclude:
+    - "spec/**/*"
+Layout/EmptyLinesAroundClassBody:
+  EnforcedStyle: empty_lines_special
+Layout/EmptyLinesAroundModuleBody:
+  EnforcedStyle: empty_lines_special
+Style/SingleLineBlockParams:
+  Enabled: false
+Style/StringLiterals:
+  EnforcedStyle: double_quotes
+Style/StringLiteralsInInterpolation:
+  EnforcedStyle: double_quotes
+Layout/MultilineMethodCallIndentation:
+  Exclude:
+    - "spec/**/*.rb"
+Style/FormatString:
+  Enabled: false
+Style/FormatStringToken:
+  Enabled: false
+Style/SymbolArray:
+  MinSize: 4
+Style/WordArray:
+  MinSize: 4
+Lint/UnusedBlockArgument:
+  Enabled: false
+Lint/UnusedMethodArgument:
+  Enabled: false
+Performance/Casecmp:
+  Enabled: false
+Performance/RedundantMerge:
+  MaxKeyValuePairs: 1
+Style/ClassCheck:
+  Enabled: false
+Style/SignalException:
+  Enabled: false
+

lib/rspec/resembles_json_matchers/resembles_any_of_matcher.rb

@@ -16,8 +16,12 @@ def initialize(expected)
 
     def matches?(actual)
       @actual = Array.wrap(actual)
-      @actual.all? do |a|
-        expected_matchers.any? { |m| attempted_matchers << m; m.matches? a }
+      if actual.empty?
+        expected_matchers.empty?
+      else
+        actual.all? do |a|
+          expected_matchers.any? { |m| attempted_matchers << m; m.matches? a }
+        end
       end
     end
 

spec/matchers/resembles_any_of_matcher_spec.rb

@@ -4,6 +4,29 @@
 
   subject(:matcher) { RSpec::ResemblesJsonMatchers::ResemblesAnyOfMatcher.new(matcher_candidates) }
 
+  describe "empty array" do
+    context "when expected has items but actual does not" do
+      let(:given) { [ ] }
+      let(:matcher_candidates) { [ 1 ] }
+
+      specify { expect(matcher.matches?(given)).to be_falsey }
+    end
+
+    context "when expected is an empty array and actual is not" do
+      let(:given) { [ 1 ] }
+      let(:matcher_candidates) { [ ] }
+
+      specify { expect(matcher.matches?(given)).to be_falsey }
+    end
+
+    context "when expected and actual are both empty" do
+      let(:given) { [ ] }
+      let(:matcher_candidates) { [ ] }
+
+      specify { expect(matcher.matches?(given)).to be_truthy }
+    end
+  end
+
   context "when every item in the given array matches one of the matchers" do
     let(:given) { [ 1, 2, "foo" ] }
     let(:matcher_candidates) { [ be_kind_of(Integer), "foo" ] }