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Got all tests pass, a little confused about the tests involving sql #2

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Got all tests pass, a little confused about the tests involving sql #2

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2 changes: 1 addition & 1 deletion models/author.rb
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
class Author < ActiveRecord::Base
class Author < ActiveRecord::Base
has_many :author_books
has_many :books, :through => :author_books
has_many :pages, :through => :books
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120 changes: 63 additions & 57 deletions test/about_active_record.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -35,107 +35,113 @@ class AboutActiveRecord < Test::Unit::TestCase
@library.books << @war_peace
@library.books << @doctor_zhivago
@library.books << @life_fate




@library.save!



@library.reload
@war_peace.reload
@leo.reload


end

context "in total" do
should "have the right number of models" do
assert_equal ___, Library.count
assert_equal ___, Book.count
assert_equal ___, Page.count
assert_equal ___, Cover.count
assert_equal ___, AuthorBook.count
assert_equal ___, Author.count
assert_equal 1, Library.count
assert_equal 3, Book.count
assert_equal 20, Page.count
assert_equal 3, Cover.count
assert_equal 3, AuthorBook.count
assert_equal 3, Author.count
end
end

context "the library" do
should "have many books" do
assert_equal ___, @library.respond_to?(:books)
assert_equal ___, @library.books.length
assert_equal ___, @library.books.first.class
assert_equal ___, @library.respond_to?(:book_id)
assert_equal ___, @library.respond_to?(:library_id)
assert_equal ___, @library.books.first.library
assert_equal true, @library.respond_to?(:books)
assert_equal 3, @library.books.length
assert_equal Book, @library.books.first.class
assert_equal false, @library.respond_to?(:book_id)
assert_equal false, @library.respond_to?(:library_id)
assert_equal @library, @library.books.first.library
end

should "know how many books are Historical fiction" do
results = @library.books.where(:genre => "Historical fiction")
assert_equal ___, results.length
assert_equal ___, results.first.class
assert_equal ___, results
assert_equal 2, results.length
assert_equal Book, results.first.class
assert_equal [@war_peace, @life_fate], results
end

should "know how many books have at least 7 pages" do
results = @library.books.includes(:pages).where('pages.number >= 7')
assert_equal ___, results.length
assert_equal ___, results.first.class
assert_equal ___, results
assert_equal 2, results.length
assert_equal Book, results.first.class
assert_equal [@war_peace, @doctor_zhivago], results
end
end

context "Leo Tolstoy" do
should "have written many pages" do
assert_equal ___, @leo.respond_to?(:pages)
assert_equal ___, @leo.pages.length
assert_equal ___, @leo.pages.first.class
assert_equal true, @leo.respond_to?(:pages)
assert_equal 10, @leo.pages.length
assert_equal Page, @leo.pages.first.class
end

should "be searchable by name" do
assert_equal ___, Author.find_by_name("Leo Tolstoy").class
assert_equal ___, Author.find_by_name("Leo Tolstoy")
assert_equal ___, Author.where(:name => "Leo Tolstoy").class
assert_equal ___, Author.where(:name => "Leo Tolstoy").first
assert_equal ___, Author.first
assert_equal Author, Author.find_by_name("Leo Tolstoy").class
assert_equal @leo , Author.find_by_name("Leo Tolstoy")
assert_equal ActiveRecord::Relation, Author.where(:name => "Leo Tolstoy").class
assert_equal @leo, Author.where(:name => "Leo Tolstoy").first
assert_equal @leo, Author.first
end
end

context "War and Peace" do
should "have one cover" do
assert_equal ___, @war_peace.respond_to?(:covers)
assert_equal ___, @war_peace.respond_to?(:cover)
assert_equal ___, @war_peace.cover.class
assert_equal ___, @war_peace.cover.book
assert_equal ___, @war_peace.respond_to?(:book_id)
assert_equal ___, @war_peace.respond_to?(:cover_id)
assert_equal ___, @war_peace.cover.respond_to?(:book_id)
assert_equal ___, @war_peace.cover.respond_to?(:cover_id)
assert_equal false, @war_peace.respond_to?(:covers)
assert_equal true, @war_peace.respond_to?(:cover)
assert_equal Cover, @war_peace.cover.class
assert_equal @war_peace, @war_peace.cover.book
assert_equal false, @war_peace.respond_to?(:book_id)
assert_equal false, @war_peace.respond_to?(:cover_id)
assert_equal true, @war_peace.cover.respond_to?(:book_id)
assert_equal false, @war_peace.cover.respond_to?(:cover_id)
end

should "have many pages" do
assert_equal ___, @war_peace.respond_to?(:pages)
assert_equal ___, @war_peace.pages.length
assert_equal ___, @war_peace.pages.first.class
assert_equal ___, @war_peace.pages.first.number
assert_equal ___, @war_peace.pages.first.book
assert_equal ___, @war_peace.respond_to?(:page_id)
assert_equal ___, @war_peace.pages.first.respond_to?(:book_id)
assert_equal ___, @war_peace.pages.first.respond_to?(:page_id)
assert_equal true, @war_peace.respond_to?(:pages)
assert_equal 10, @war_peace.pages.length #pages is a method which returns an array of page objects from the object @war_peace
assert_equal Page, @war_peace.pages.first.class
assert_equal 1, @war_peace.pages.first.number
assert_equal @war_peace, @war_peace.pages.first.book
assert_equal false, @war_peace.respond_to?(:page_id)
assert_equal true, @war_peace.pages.first.respond_to?(:book_id)
assert_equal false, @war_peace.pages.first.respond_to?(:page_id)
end

should "have many authors" do
assert_equal ___, @war_peace.respond_to?(:authors)
assert_equal ___, @war_peace.respond_to?(:author_books)
assert_equal ___, @war_peace.authors.class
assert_equal ___, @war_peace.authors.length
assert_equal ___, @war_peace.authors.first.name
assert_equal ___, @war_peace.respond_to?(:author_id)
assert_equal ___, @war_peace.respond_to?(:author_book_id)
assert_equal ___, @war_peace.authors.first.respond_to?(:book_id)
assert_equal ___, @war_peace.author_books.first.respond_to?(:book_id)
assert_equal ___, @war_peace.author_books.first.respond_to?(:author_id)
assert_equal ___, @war_peace.author_books.to_sql.chomp.gsub("\"", "'").squeeze(" ")
assert_equal ___, @war_peace.authors.to_sql.chomp.gsub("\"", "'").squeeze(" ")
assert_equal true, @war_peace.respond_to?(:authors)
assert_equal true, @war_peace.respond_to?(:author_books)
assert_equal Array, @war_peace.authors.class
assert_equal 1, @war_peace.authors.length
assert_equal "Leo Tolstoy", @war_peace.authors.first.name
assert_equal false, @war_peace.respond_to?(:author_id)
assert_equal false, @war_peace.respond_to?(:author_book_id)
assert_equal false, @war_peace.authors.first.respond_to?(:book_id)
assert_equal true, @war_peace.author_books.first.respond_to?(:book_id)
assert_equal true, @war_peace.author_books.first.respond_to?(:author_id)
assert_equal "SELECT 'author_books'.* FROM 'author_books' WHERE 'author_books'.'book_id' = 1", @war_peace.author_books.to_sql.chomp.gsub("\"", "'").squeeze(" ")
assert_equal "SELECT 'authors'.* FROM 'authors' INNER JOIN 'author_books' ON 'authors'.'id' = 'author_books'.'author_id' WHERE 'author_books'.'book_id' = 1", @war_peace.authors.to_sql.chomp.gsub("\"", "'").squeeze(" ")
end

should "be searchable by name" do
assert_equal ___, Book.where(:title => "War & Peace").class
assert_equal ___, Book.where(:title => "War & Peace").to_sql.chomp.gsub("\"", "'").squeeze(" ")
assert_equal ActiveRecord::Relation, Book.where(:title => "War & Peace").class
assert_equal "SELECT 'books'.* FROM 'books' WHERE 'books'.'title' = 'War & Peace'", Book.where(:title => "War & Peace").to_sql.chomp.gsub("\"", "'").squeeze(" ")
end
end

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