RSpec Matcher helper:::

gistfile1.rb

#true/false 

target.should be 
# can connect to every method that ends with ?
#ex :
target.should be_admin
# check target.admin?

target.should be_true
target.should be_false
target.should be_nil
target.should_not be_arbitary_predicate(*args)
#ex:
target.should be_a_kinds_of(Fixnum) # => target.kinds_of?

#equal

target.should equal(expect)
# ===
target.should == expect

#include

[1,2,3].should includes(1)

#change
should change(receiver, message, &block)
should change(receiver, message, &block).by(value)
should change(receiver, message, &block).from(old).to(new)
should_not change(receiver, message, &block)
#ex:
lambda {
  User.create!(:name => "Tester")
}.should change(User,:count).by(1)