Skip macro code in Style/IsAFilter rule

spec/ameba/rule/style/is_a_filter_spec.cr

@@ -38,11 +38,11 @@ module Ameba::Rule::Style
     end
 
     context "macro" do
-      it "reports in macro scope" do
+      it "doesn't report in macro scope" do
         source = Source.new %(
           {{ [1, 2, nil].reject(&.nil?) }}
         )
-        subject.catch(source).should_not be_valid
+        subject.catch(source).should be_valid
       end
     end
 

src/ameba/rule/style/is_a_filter.cr

@@ -46,6 +46,15 @@ module Ameba::Rule::Style
 
     MSG = "Use `%s(%s)` instead of `%s {...}`"
 
+    def test(source)
+      AST::NodeVisitor.new self, source, skip: [
+        Crystal::Macro,
+        Crystal::MacroExpression,
+        Crystal::MacroIf,
+        Crystal::MacroFor,
+      ]
+    end
+
     def test(source, node : Crystal::Call)
       return unless node.name.in?(filter_names)
       return unless (block = node.block)