driver_test.rb

require "minitest/autorun"

require_relative "driver"

class DriverTest < Minitest::Test

  def setup
    @d = Driver::new("Driver 1")
  end

  # UNIT TESTS FOR METHOD add_book
  # There are no parameters, it does not make sense to partition it.
  # This test ensures that when a book is added, the number of books increases by 1.
  def test_add_book
    @d.add_book
    assert_equal @d.books, 1
    @d.add_book
    assert_equal @d.books, 2
  end

  # UNIT TESTS FOR METHOD add_dino
  # There are no parameters, it does not make sense to partition it.
  # This test ensures that when a dino is added, the number of dinos increases by 1.
  def test_add_dino
    @d.add_dino
    assert_equal @d.dinos, 1
    @d.add_dino
    assert_equal @d.dinos, 2
  end

  # UNIT TESTS FOR METHOD add_class
  # There are no parameters, it does not make sense to partition it.
  # This test ensures that when a class is added, the number of dinos multiplies by 2.
  def test_add_class
    assert_equal @d.classes, 1
    @d.add_class
    assert_equal @d.classes, 2
    @d.add_class
    assert_equal @d.classes, 4
  end

  # UNIT TESTS FOR METHOD pluralize(singularStr, num)
  # Equivalence classes:
  # num = 0 && singularStr ends with s -> returns "#{singularStr}es"
  # num = 0 && singularStr does not end with s -> returns "#{singularStr}s"
  # num = 1 -> returns singularStr
  # num = 2..INFINITY && singularStr ends with s -> returns "#{singularStr}es"
  # num = 2..INFINITY && singularStr does not end with s -> returns "#{singularStr}s"

  # num = 0 && singularStr ends with s -> returns "#{singularStr}es"
  # 0 classes should return "classes"
  def test_pluralize_zero_ends_s
    assert_equal "classes", @d.pluralize("class", 0)
  end

  # num = 0 && singularStr does not end with s -> returns "#{singularStr}s"
  # 0 books should return "books"
  def test_pluralize_zero_not_ends_s
    assert_equal "books", @d.pluralize("book", 0)
  end

  # num = 1 -> returns singularStr
  # 1 book should return "book"
  def test_pluralize_one
    assert_equal "book", @d.pluralize("book", 1)
  end

  # num = 2..INFINITY && singularStr ends with s -> returns "#{singularStr}es"
  # 2 classes should return "classes"
  def test_pluralize_two_ends_s
    assert_equal "classes", @d.pluralize("class", 2)
  end

  # num = 2..INFINITY && singularStr does not end with s -> returns "#{singularStr}s"
  # 2 books should return "books"
  def test_pluralize_two_not_ends_s
    assert_equal "books", @d.pluralize("book", 2)
  end

  # UNIT TESTS FOR METHOD print_results
  # There are no parameters, it does not make sense to partition it.
  # This test ensures the proper output with arbitrary values assigned to books, dinos, & classes.
  def test_print_results
    @d.books = 6
    @d.dinos = 11
    @d.classes = 4
    assert_output("Driver 1 obtained 6 books!\nDriver 1 obtained 11 dinosaur toys!\nDriver 1 attended 4 classes!\n") { @d.print_results }
  end

end