Example of Model Testing

item_spec.rb

require 'spec_helper'

describe Item do
  it "should exist" do
    item = Item.new
    expect item
  end

  it "should have a name" do
    item = Item.new(name: "hammer")
    expect item.name.should eq "hammer"
  end

  it "should have a description" do
    item = Item.new(description: "long")
    expect item.description.should eq "long"
  end

  it "should not be valid without a name" do
    item = Item.new(description: "short")
    expect(item).not_to be_valid
  end

  it "should not be valid without a description" do
    item = Item.new(name: "ball")
    expect(item).not_to be_valid
  end

  it "should not create and item if the name exists" do
    item1 = Item.create(name: "ball", description: "round")
    item2 = Item.create(name: "ball", description: "red")

    expect(item2).not_to be_valid
  end

  it "should have orders" do
    item = Item.new
    expect item.orders
  end

  it "should have order items" do
    item = Item.new
    expect item.order_items
  end
end