Don't report same line for multiple duplications

lib/cc/engine/analyzers/reporter.rb

@@ -12,6 +12,7 @@ def initialize(engine_config, language_strategy, io)
           @engine_config = engine_config
           @language_strategy = language_strategy
           @io = io
+          @reports = Set.new
         end
 
         def run
@@ -35,7 +36,12 @@ def process_files
 
         def report
           flay.report(StringIO.new).each do |issue|
-            io.puts "#{new_violation(issue).to_json}\0"
+            violation = new_violation(issue)
+
+            unless reports.include?(violation.report_name)
+              reports.add(violation.report_name)
+              io.puts "#{violation.format.to_json}\0"
+            end
           end
         end
 
@@ -46,6 +52,8 @@ def process_sexp(sexp)
 
         private
 
+        attr_reader :reports
+
         def flay
           @flay ||= Flay.new(flay_options)
         end
@@ -58,7 +66,7 @@ def mass_threshold
 
         def new_violation(issue)
           hashes = flay.hashes[issue.structural_hash]
-          Violation.new(language_strategy.base_points, issue, hashes).format
+          Violation.new(language_strategy.base_points, issue, hashes)
         end
 
         def flay_options

lib/cc/engine/analyzers/violation.rb

@@ -26,6 +26,10 @@ def format
           }
         end
 
+        def report_name
+          "#{current_sexp.file}-#{current_sexp.line}"
+        end
+
         private
 
         attr_reader :base_points, :hashes

spec/cc/engine/analyzers/javascript/main_spec.rb

@@ -58,6 +58,16 @@
       expect(run_engine(engine_conf)).to be_empty
   end
 
+  it "does not report the same line for multiple issues" do
+    create_source_file("dup.jsx", <<-EOJSX)
+          <a className='button button-primary full' href='#' onClick={this.onSubmit.bind(this)}>Login</a>
+    EOJSX
+
+    result = run_engine(engine_conf).strip
+    issues = result.split("\0")
+    expect(issues.length).to eq 1
+  end
+
   def create_source_file(path, content)
     File.write(File.join(@code, path), content)
   end