write some specs for models

app/models/report.rb

@@ -1,6 +1,6 @@
 class Report < ActiveRecord::Base
   belongs_to :user
-  has_many :comments
+  has_many :comments, :dependent => :destroy
 
   validates :date, :presence => true
   validates :body, :presence => true

app/models/user.rb

@@ -1,5 +1,6 @@
 class User < ActiveRecord::Base
-  has_many :reports
+  has_many :reports, :dependent => :destroy
+  has_many :comments, :dependent => :destroy
 
   validates :uid, :presence => true
   validates :nickname, :presence => true

spec/fabricators/comment_fabricator.rb

@@ -1,5 +1,5 @@
 Fabricator(:comment) do
-  report_id 1
-  user_id 1
+  report!
+  user!
   body "MyText"
 end

spec/fabricators/report_fabricator.rb

@@ -1,5 +1,5 @@
 Fabricator(:report) do
   date "2012-01-31"
-  user_id 1
+  user!
   body "MyText"
 end

spec/models/comment_spec.rb

@@ -1,5 +1,34 @@
+# coding: utf-8
 require 'spec_helper'
 
 describe Comment do
-  pending "add some examples to (or delete) #{__FILE__}"
+  describe '.create' do
+    let(:comment) { Fabricate :comment }
+    subject { comment }
+    context 'パラメータが正しい時' do
+      it { should be_valid }
+    end
+    context '本文が空の時' do
+      before do
+        comment.body = ''
+      end
+      it { should_not be_valid }
+    end
+  end
+  describe '#destroy' do
+    let(:comment) { Fabricate :comment }
+    subject { Comment.where(comment.id).first }
+    context '日報が削除された時' do
+      before do
+        comment.report.destroy
+      end
+      it { should be_nil }
+    end
+    context 'ユーザーが削除された時' do
+      before do
+        comment.user.destroy
+      end
+      it { should be_nil }
+    end
+  end
 end

spec/models/report_spec.rb

@@ -1,5 +1,49 @@
+# coding: utf-8
 require 'spec_helper'
 
 describe Report do
-  pending "add some examples to (or delete) #{__FILE__}"
+  describe '.create' do
+    let(:report) { Fabricate :report }
+    subject { report }
+    context 'パラメータが正しいとき' do
+      it { should be_valid }
+    end
+    context '本文が空の時' do
+      before do
+        report.body = ''
+      end
+      it { should_not be_valid }
+    end
+    context '日付が空の時' do
+      before do
+        report.date = nil
+      end
+      it { should_not be_valid }
+    end
+  end
+  describe '.latest_date' do
+    subject { Report.latest_date }
+    before do
+      Fabricate(:report, :date => '2012-01-01')
+    end
+    context '2012-01-01 の日報だけがあるとき' do
+      it { should == Date.parse('2012-01-01') }
+    end
+    context 'さらに 2012-01-02 の日報があるとき' do
+      before do
+        Fabricate(:report, :date => '2012-01-02')
+      end
+      it { should == Date.parse('2012-01-02') }
+    end
+  end
+  describe '#destroy' do
+    let(:report) { Fabricate :report }
+    subject { Report.where(report.id).first }
+    context 'ユーザーが削除された時' do
+      before do
+        report.user.destroy
+      end
+      it { should be_nil }
+    end
+  end
 end