Add test for negated build.with?

Library/Homebrew/rubocops/extend/formula_cop.rb

@@ -252,11 +252,15 @@ module RuboCop
       end
 
       # Check if method_name is called among the direct children nodes in the given node
+      # Check if the node itself is the method
       def method_called?(node, method_name)
+        if node.send_type? && node.method_name == method_name
+          offending_node(node)
+          return true
+        end
         node.each_child_node(:send) do |call_node|
           next unless call_node.method_name == method_name
-          @offensive_node = call_node
-          @offense_source_range = call_node.source_range
+          offending_node(call_node)
           return true
         end
         false

Library/Homebrew/rubocops/lines_cop.rb

@@ -287,11 +287,11 @@ module RuboCop
             problem "Use if #{correct} instead of unless #{m.source}"
           end
 
-          # find_instance_method_call(body_node, :build, :with?) do |m|
-          #   next unless negation?(m)
-          #   problem "Don't negate 'build.with?': use 'build.without?'"
-          # end
-          #
+          find_instance_method_call(body_node, :build, :with?) do |m|
+            next unless method_called?(m.parent, :!)
+            problem "Don't negate 'build.with?': use 'build.without?'"
+          end
+
           # find_instance_method_call(body_node, :build, :without?) do |m|
           #   next unless negation?(m)
           #   problem "Don't negate 'build.without?': use 'build.with?'"
@@ -324,6 +324,7 @@ module RuboCop
         end
 
         def unless_modifier?(node)
+          return false unless node.if_type?
           node.modifier_form? && node.unless?
         end
 

Library/Homebrew/test/rubocops/lines_cop_spec.rb

@@ -667,6 +667,30 @@ describe RuboCop::Cop::FormulaAudit::Miscellaneous do
         expect_offense(expected, actual)
       end
     end
+
+    it "with negated build.with?" do
+      source = <<-EOS.undent
+        class Foo < Formula
+          desc "foo"
+          url 'http://example.com/foo-1.0.tgz'
+          def post_install
+            return if !build.with? "bar"
+          end
+        end
+      EOS
+
+      expected_offenses = [{  message: "Don't negate 'build.with?': use 'build.without?'",
+                              severity: :convention,
+                              line: 5,
+                              column: 14,
+                              source: source }]
+
+      inspect_source(cop, source)
+
+      expected_offenses.zip(cop.offenses).each do |expected, actual|
+        expect_offense(expected, actual)
+      end
+    end
   end
   def expect_offense(expected, actual)
     expect(actual.message).to eq(expected[:message])