Make Node#condition? aware of case-match node

changelog/new_make_node_condition_p_aware_of_case_match.md

@@ -0,0 +1 @@
+* [#227](https://github.com/rubocop-hq/rubocop-ast/pull/227):  Make `Node#condition?` aware of `case-match` node. ([@koic][])

lib/rubocop/ast/node.rb

@@ -57,7 +57,7 @@ class Node < Parser::AST::Node # rubocop:disable Metrics/ClassLength
       # @api private
       BASIC_CONDITIONALS = %i[if while until].to_set.freeze
       # @api private
-      CONDITIONALS = (BASIC_CONDITIONALS + [:case]).freeze
+      CONDITIONALS = (BASIC_CONDITIONALS + %i[case case_match]).freeze
       # @api private
       POST_CONDITION_LOOP_TYPES = %i[while_post until_post].to_set.freeze
       # @api private

spec/rubocop/ast/node_spec.rb

@@ -836,4 +836,86 @@ class << expr
       end
     end
   end
+
+  describe '#conditional?' do
+    context 'when `if` node' do
+      let(:src) do
+        <<~RUBY
+          if condition
+          end
+        RUBY
+      end
+
+      it 'is true' do
+        expect(node).to be_conditional
+      end
+    end
+
+    context 'when `while` node' do
+      let(:src) do
+        <<~RUBY
+          while condition
+          end
+        RUBY
+      end
+
+      it 'is true' do
+        expect(node).to be_conditional
+      end
+    end
+
+    context 'when `until` node' do
+      let(:src) do
+        <<~RUBY
+          until condition
+          end
+        RUBY
+      end
+
+      it 'is true' do
+        expect(node).to be_conditional
+      end
+    end
+
+    context 'when `case` node' do
+      let(:src) do
+        <<~RUBY
+          case condition
+          when foo
+          end
+        RUBY
+      end
+
+      it 'is true' do
+        expect(node).to be_conditional
+      end
+    end
+
+    context 'when `case_match` node', :ruby27 do
+      let(:src) do
+        <<~RUBY
+          case pattern
+          in foo
+          end
+        RUBY
+      end
+
+      it 'is true' do
+        expect(node).to be_conditional
+      end
+    end
+
+    context 'when post condition loop node' do
+      let(:src) do
+        <<~RUBY
+          begin
+          end while condition
+        RUBY
+      end
+
+      it 'is false' do
+        expect(node).not_to be_conditional
+      end
+    end
+  end
 end