lancepantz / difform

allows you to diff clojure forms

# difform

Diffs two clojure forms, eg:

(use 'com.georgejahad.difform)
(difform { 1 2 3 4 5 6} { 5 6 1 2 3 7})
   {1 2, 3
 - 4
 + 7
   , 5 6}

(difform

{:cart {:items [{:new-delivery {:ids ["-1"]}, :old-unit-price "700.00", :product-id "prod-1", :quantity "1", :unit-price "700.00"}], :old-total-dollars "700.00", :purchase? false, :total-dollars "700.00"}, :day "2010-05-18", :event-ids ["1274166000010:some-session-id-1"], :old-id "14", :delivery {:ids [nil]}, :session "some-session-id-1"}

{:day "2010-05-18", :old-id "14", :session "some-session-id-1", :delivery nil, :cart {:purchase? false, :old-total-dollars "1400.00", :total-dollars "1400.00", :items [{:product-id "prod-1", :old-unit-price "700.00", :unit-price "700.00", :quantity "2", :new-delivery {:ids ["-1"]}}]}, :event-ids ["1274166000000:some-session-id-1"]})


   {:cart
    {:items
     [{:new-delivery {:ids ["-1"]},
       :old-unit-price "700.00",
       :product-id "prod-1",
       :quantity "
 - 1
 + 2
   ",
       :unit-price "700.00"}],
     :old-total-dollars "
 - 7
 + 14
   00.00",
     :purchase? false,
     :total-dollars "
 - 7
 + 14
   00.00"},
    :day "2010-05-18",
    :delivery
 - {:ids [
   nil
 - ]}
   ,
    :event-ids ["1274166
 + 0
   0000
 - 1
   0:some-session-id-1"],
    :old-id "14",
    :session "some-session-id-1"}

A very common use is with clojure.test.  For example, if clojure test reports you have failed a test like this:

FAIL in (xyz-test) (xyz_spec.clj:7)
expected: (= form1 form2)

Run (diff form1 form2) to see what the exact failure was.