require 'spec_helper'

describe VkontakteApi::Namespace do
  describe ".names" do
    before(:each) do
      VkontakteApi::Namespace.instance_variable_set(:@names, nil)
    end
    
    context "on first call" do
      it "loads namespaces from a file" do
        filename = double("Filename")
        expect(File).to receive(:expand_path).and_return(filename)
        namespaces = double("Namespaces list")
        expect(YAML).to receive(:load_file).with(filename).and_return(namespaces)
        
        VkontakteApi::Namespace.names
      end
    end
    
    context "on subsequent calls" do
      before(:each) do
        VkontakteApi::Namespace.names
      end
      
      it "returns the cached list" do
        expect(YAML).not_to receive(:load_file)
        VkontakteApi::Namespace.names
      end
    end
  end
  
  describe ".exists?" do
    context "with an existing namespace" do
      it "returns true" do
        expect(VkontakteApi::Namespace).to exist('users')
      end
    end
    
    context "with a non-existent namespace" do
      it "returns false" do
        expect(VkontakteApi::Namespace).not_to exist('admins')
      end
    end
    
    context "with an existing symbol namespace" do
      it "returns true" do
        expect(VkontakteApi::Namespace).to exist(:users)
      end
    end
  end
end