spec/persistable_spec.rb

   1 require File.dirname(__FILE__) + '/spec_helper.rb'
   2
   3 class Bike
   4   include CouchObject::Persistable
   5
   6   def initialize
   7     @wheels = 2
   8   end
   9   attr_accessor :wheels
  10
  11   def to_couch
  12     {:wheels => @wheels}
  13   end
  14
  15   def self.from_couch(attributes)
  16     bike = new
  17     bike.wheels = attributes["wheels"]
  18     bike
  19   end
  20 end
  21
  22 describe CouchObject::Persistable, "when mixed into a Class" do
  23   before(:each) do
  24     @bike = Bike.new
  25     @db = mock("mock db")
  26
  27     @empty_response = {}
  28     @ok_response = {"ok" => true}
  29     @document_response = {
  30       "_id" => "123BAC",
  31       "_rev" => "946B7D1C",
  32       "attributes" => {
  33         "wheels" => 3
  34       }
  35     }
  36   end
  37
  38   it "should give the class a save method that saves the object" do
  39     CouchObject::Database.should_receive(:open).and_return(@db)
  40     @db.should_receive(:post).with("", @bike.to_json).and_return(@empty_response)
  41     @bike.save("foo")
  42   end
  43
  44   it "should raise if no to_couch on class" do
  45     klass = Class.new{ include CouchObject::Persistable }
  46     proc{ klass.new.to_json }.should raise_error(CouchObject::Persistable::NoToCouchMethodError)
  47   end
  48
  49   it "should raise if no to_couch on class" do
  50     klass = Class.new{
  51       include CouchObject::Persistable
  52       def to_couch() end
  53     }
  54     proc{ klass.get_by_id("foo", "bar") }.should raise_error(CouchObject::Persistable::NoFromCouchMethodError)
  55   end
  56
  57   it "should return the doc id on successfull save" do
  58     CouchObject::Database.should_receive(:open).and_return(@db)
  59     @db.should_receive(:post).with("", @bike.to_json).and_return(@document_response)
  60     @bike.save("foo")["_id"].should == "123BAC"
  61   end
  62
  63   it "should assign the returned id to itself on successful save" do
  64     CouchObject::Database.should_receive(:open).and_return(@db)
  65     @db.should_receive(:post).with("", @bike.to_json).and_return(@document_response)
  66     @bike.save("foo")
  67     @bike.id.should == "123BAC"
  68   end
  69
  70   it "should know if itself is a new object" do
  71     CouchObject::Database.should_receive(:open).and_return(@db)
  72     @db.should_receive(:post).with("", @bike.to_json).and_return(@document_response)
  73     @bike.new?.should == true
  74     @bike.save("foo")
  75     @bike.new?.should == false
  76   end
  77
  78   it "should get document by id" do
  79     CouchObject::Database.should_receive(:open).and_return(@db)
  80     @db.should_receive(:get).with("123BAC").and_return(@document_response)
  81     Bike.get_by_id("foo", "123BAC")
  82   end
  83
  84   it "should instantiate a new object based on their #to_couch" do
  85     CouchObject::Database.should_receive(:open).and_return(@db)
  86     @db.should_receive(:get).with("123BAC").and_return(@document_response)
  87     bike = Bike.get_by_id("foo", "123BAC")
  88     bike.class.should == Bike
  89     bike.wheels.should == 3
  90   end
  91 end