work_test.rb

require "test_helper"

# Add Relations Tests in Wave 2
# Add Fixtures Later
# New? Create?

describe Work do
  it "can be instantiated and is valid when all required fields are present" do
    # Arrange
    @work = Work.new(title: "Long", category: "Movie")

    # Act
    created_work = @work.valid?

    # Assert
    expect(created_work).must_equal true
  end

  it "is invalid without title" do
    # Arrange
    @work = Work.new(category: "Movie")

    #Act
    created_work = @work.valid?

    # Assert
    expect(created_work).must_equal false
    expect(@work.errors.messages).must_include :title
  end

  it "is invalid without category" do
    # Arrange
    @work = Work.new(title: "Long")

    #Act
    created_work = @work.valid?

    # Assert
    expect(created_work).must_equal false
    expect(@work.errors.messages).must_include :category
  end

  it "returns a spotlight work" do
    spotlit = Work.spotlight

    expect(spotlit).must_be_instance_of Work
  end

  it "returns nil for spotlight when database is empty" do
    Work.delete_all
    expect(Work.count).must_equal 0
    expect(Work.spotlight).must_be_nil
  end

  it "returns an array for top 10" do
    top_books = Work.top_ten("book")

    expect(top_books).must_be_instance_of Array
  end

  it "returns an array of 10 books for top 10 method" do
    top_books = Work.top_ten("book")

    expect(top_books.length).must_equal 10
  end
end