Handle NoMethodError for IRB implicit #ai

CHANGELOG.md

@@ -1,5 +1,5 @@
 ## master (unreleased)
-
+  - Handles NoMethodError for IRB implicit `ai` [@jtnegrotto] - [#212]
 
 ## 1.7.0
   - Refactoring by extracting formatters into their own classes [@waldyr] - [#237]
@@ -129,6 +129,7 @@
   - Initial Release.
 
   [#200]: https://github.com/awesome-print/awesome_print/pull/200
+  [#212]: https://github.com/awesome-print/awesome_print/pull/212
   [#216]: https://github.com/awesome-print/awesome_print/pull/216
   [#217]: https://github.com/awesome-print/awesome_print/pull/217
   [#222]: https://github.com/awesome-print/awesome_print/pull/222
@@ -145,6 +146,7 @@
   [@clonezone]: https://github.com/clonezone
   [@cyberdelia]: https://github.com/cyberdelia
   [@gerrywastaken]: https://github.com/gerrywastaken
+  [@jtnegrotto]: https://github.com/jtnegrotto
   [@kemmason]: https://github.com/kemmason
   [@maurogeorge]: https://github.com/maurogeorge
   [@MaxPleaner]: https://github.com/MaxPleaner

lib/awesome_print/inspector.rb

@@ -31,6 +31,8 @@ module AwesomePrint
         IRB::Irb.class_eval do
           def output_value
             ap @context.last_value
+          rescue NoMethodError
+            puts "(Object doesn't support #ai)"
           end
         end
       else # MacRuby
@@ -55,7 +57,7 @@ module AwesomePrint
     AP = :__awesome_print__
 
     def initialize(options = {})
-      @options = { 
+      @options = {
         :indent          => 4,      # Indent using 4 spaces.
         :index           => true,   # Display array indices.
         :html            => false,  # Use ANSI color codes rather than HTML.
@@ -65,7 +67,7 @@ module AwesomePrint
         :sort_keys       => false,  # Do not sort hash keys.
         :limit           => false,  # Limit large output for arrays and hashes. Set to a boolean or integer.
         :new_hash_syntax => false,  # Use the JSON like syntax { foo: 'bar' }, when the key is a symbol
-        :color => { 
+        :color => {
           :args       => :pale,
           :array      => :white,
           :bigdecimal => :blue,
@@ -104,7 +106,7 @@ module AwesomePrint
     def increase_indentation
       indentator.indent(&Proc.new)
     end
-  
+
     # Dispatcher that detects data nesting and invokes object-aware formatter.
     #------------------------------------------------------------------------------
     def awesome(object)

spec/misc_spec.rb

@@ -246,5 +246,17 @@ EOS
       expect(capture! { ap({ :a => 1 }) }).to eq(nil)
       Object.instance_eval{ remove_const :IRB }
     end
+
+    it "handles NoMethodError on IRB implicit #ai" do
+      module IRB; class Irb; end; end
+      irb_context = double('irb_context', last_value: BasicObject.new)
+      IRB.define_singleton_method :version, -> { 'test_version' }
+      irb = IRB::Irb.new
+      irb.instance_eval { @context = irb_context }
+      AwesomePrint.irb!
+      expect(irb).to receive(:puts).with("(Object doesn't support #ai)")
+      expect { irb.output_value }.to_not raise_error
+      Object.instance_eval { remove_const :IRB }
+    end
   end
 end