Ensure truncate message only returns on truncated values

At the moment we return the "Truncate" text whenever the setting is
utilized. This PR ensures that we only advise truncation when it's been
executed.

Signed-off-by: Nick Schwaderer <nschwaderer@chef.io>

lib/inspec/plugin/v2/plugin_types/reporter.rb

@@ -31,17 +31,14 @@ module Inspec::Plugin::V2::PluginType
       runtime_config = Inspec::Config.cached.respond_to?(:final_options) ? Inspec::Config.cached.final_options : {}
 
       message_truncation = runtime_config[:reporter_message_truncation] || "ALL"
-      trunc = message_truncation == "ALL" ? -1 : message_truncation.to_i
+      @trunc = message_truncation == "ALL" ? -1 : message_truncation.to_i
       include_backtrace = runtime_config[:reporter_backtrace_inclusion].nil? ? true : runtime_config[:reporter_backtrace_inclusion]
 
       @run_data[:profiles]&.each do |p|
         p[:controls].each do |c|
           c[:results]&.map! do |r|
             r.delete(:backtrace) unless include_backtrace
-            if r.key?(:message) && r[:message] != "" && trunc > -1
-              r[:message] = r[:message][0...trunc] + "[Truncated to #{trunc} characters]"
-            end
-            r
+            process_message_truncation(r)
           end
         end
       end
@@ -64,5 +61,14 @@ module Inspec::Plugin::V2::PluginType
     def self.run_data_schema_constraints
       raise NotImplementedError, "#{self.class} must implement a `run_data_schema_constraints` class method to declare its compatibiltity with the RunData API."
     end
+
+    private
+
+    def process_message_truncation(result)
+      if result.key?(:message) && result[:message] != "" && @trunc > -1 && result[:message].length > @trunc
+        result[:message] = result[:message][0...@trunc] + "[Truncated to #{@trunc} characters]"
+      end
+      result
+    end
   end
 end

lib/inspec/reporters/base.rb

@@ -14,17 +14,14 @@ module Inspec::Reporters
       runtime_config = Inspec::Config.cached.respond_to?(:final_options) ? Inspec::Config.cached.final_options : {}
 
       message_truncation = runtime_config[:reporter_message_truncation] || "ALL"
-      trunc = message_truncation == "ALL" ? -1 : message_truncation.to_i
+      @trunc = message_truncation == "ALL" ? -1 : message_truncation.to_i
       include_backtrace = runtime_config[:reporter_backtrace_inclusion].nil? ? true : runtime_config[:reporter_backtrace_inclusion]
 
       @run_data[:profiles]&.each do |p|
         p[:controls].each do |c|
           c[:results]&.map! do |r|
             r.delete(:backtrace) unless include_backtrace
-            if r.key?(:message) && r[:message] != "" && trunc > -1
-              r[:message] = r[:message][0...trunc] + "[Truncated to #{trunc} characters]"
-            end
-            r
+            process_message_truncation(r)
           end
         end
       end
@@ -43,5 +40,14 @@ module Inspec::Reporters
     def render
       raise NotImplementedError, "#{self.class} must implement a `#render` method to format its output."
     end
+
+    private
+
+    def process_message_truncation(result)
+      if result.key?(:message) && result[:message] != "" && @trunc > -1 && result[:message].length > @trunc
+        result[:message] = result[:message][0...@trunc] + "[Truncated to #{@trunc} characters]"
+      end
+      result
+    end
   end
 end

test/functional/inspec_exec_json_test.rb

@@ -299,6 +299,16 @@ describe "inspec exec with json formatter" do
     end
   end
 
+  describe "JSON reporter with reporter-message-truncation set to a number and working message" do
+    let(:raw) { inspec("exec " + failure_control + " --reporter json --reporter-message-truncation=10000 --no-create-lockfile").stdout }
+    let(:json) { JSON.load(raw) }
+    let(:profile) { json["profiles"][0] }
+    let(:control_with_message) { profile["controls"].find { |c| c["id"] == "Generates a message" } }
+    it "does not report a truncated message" do
+      assert !control_with_message["results"].first["message"].include?("Truncated")
+    end
+  end
+
   describe "JSON reporter with reporter-message-truncation set to ALL" do
     let(:raw) { inspec("exec " + failure_control + " --reporter json --reporter-message-truncation=ALL --no-create-lockfile").stdout }
     let(:json) { JSON.load(raw) }