Aruna && Monalisa

app/models/rental.rb

@@ -1,4 +1,6 @@
 class Rental < ApplicationRecord
   belongs_to :customer
   belongs_to :movie
+  validates :checkout_date, presence: true
+  validates :due_date, presence: true
 end

test/models/rental_test.rb

@@ -2,8 +2,56 @@
 
 describe Rental do
   let(:rental) { Rental.new }
+  let(:rental1) { rentals(:one) }
 
-  it "must be valid" do
-    value(rental).must_be :valid?
+  describe "relations" do
+    it "has a customer" do
+      rental1.must_respond_to :customer
+      rental1.customer.must_be_kind_of Customer
+      rental1.customer.must_equal customers(:mary)
+    end
+    it "has a movie" do
+      rental1.must_respond_to :movie
+      rental1.movie.must_be_kind_of Movie
+      rental1.movie.must_equal movies(:one)
+    end
+
+    it "changes in customer_id and movie_id reflects in customer and movie" do
+      rental1.customer_id = customers(:sally).id
+      rental1.customer.must_equal customers(:sally)
+
+      rental1.movie_id = movies(:two).id
+      rental1.movie.must_equal movies(:two)
+    end
+  end
+
+  describe "validations" do
+    it "has validation for empty parameters" do
+      rental.valid?.must_equal false
+    end
+
+    it "has validation for due_date presence" do
+      rental1.due_date = nil
+      rental1.valid?.must_equal false
+      rental1.errors.messages.must_include :due_date
+
+      rental1.due_date = ""
+      rental1.valid?.must_equal false
+      rental1.errors.messages.must_include :due_date
+    end
+
+    it "has validation for checkout_date presence" do
+      rental1.checkout_date = nil
+      rental1.valid?.must_equal false
+      rental1.errors.messages.must_include :checkout_date
+
+      rental1.checkout_date = ""
+      rental1.valid?.must_equal false
+      rental1.errors.messages.must_include :checkout_date
+    end
+
+    it "must be valid" do
+      rental1.valid?.must_equal true
+    end
   end
 end