Solar System - Faezeh

main.rb

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+require_relative 'planet'
+require_relative 'solar_system'
+require 'BigDecimal'
+
+def main
+  earth = Planet.new('Earth', 'blue-green', 5.972e24, 1.496e8, 'is the only planet known to support life')
+  neptune = Planet.new('Neptune', 'blue', 1.024e26, 4.477e9, 'is the farthest planet from the sun')
+
+  puts "#{earth.summary} vs. #{neptune.summary}.\n\n"
+end
+
+# for having the program work as described in wave 3 the following line needs to be commented out:
+main
+
+solar_system = SolarSystem.new('Sun')
+
+# I wonder if I could have stored these in a CSV file and looped throught for makeing the  news instances of Planet!
+mercury = Planet.new('Mercury', 'red', 0.330e24, 57e6, 'smallest planet in our Solar System.')
+venus = Planet.new('Venus', 'yellow', 4.87e24, 108e6, 'hottest planet in the Solar System.')
+earth = Planet.new('Earth', 'blue-green', 5.972e24, 1.496e8, 'The Earth is the densest planet in the Solar System.')
+mars = Planet.new('Mars', 'red', 6.42e23, 249e6, 'Both of Mars’ poles are blanketed in ice.')
+jupiter = Planet.new('Jupiter', 'blue-red', 1.898e27, 817e6, 'Jupiter is the largest planet in our Solar System.')
+saturn = Planet.new('Saturn', 'pink', 5.69e26, 1.5e9, 'Saturn’s rings are made primarily of “water ice" mixed with dust and other chemicals.')
+uranus = Planet.new('Uranus', 'blue', 8.68e25, 3e9, 'Uranus is the coldest of the planets.')
+neptune = Planet.new('Neptune', 'dark blue', 1.02e26, 4.5e9, 'Neptune’s blue color is due to the absorption of red light by methane in the atmosphere.')
+
+solar_system.add_planet(mercury)
+solar_system.add_planet(venus)
+solar_system.add_planet(earth)
+solar_system.add_planet(mars)
+solar_system.add_planet(jupiter)
+solar_system.add_planet(saturn)
+solar_system.add_planet(uranus)
+solar_system.add_planet(neptune)
+
+list = solar_system.list_planets
+puts list
+
+found_planet = solar_system.find_planet_by_name('Mars')
+puts "\nThe address of the planet your are looking for is: #{found_planet}"
+puts found_planet.summary
+distance = solar_system.distance_between('Mars', 'Uranus')
+puts "The distance between Mars and Uranus is #{distance} in kilometers.\n"
+
+answer = ""
+while answer != "Q"
+  print "\nThanks for trying out my solary system program. \nWhat would you like to do now?\nType \"L\" for a list of planets,\nType \"D\" if you want details about a specific planet, \nType \"P\" if you want to add a new planet or,\nType \"Q\" to exit:"
+  answer = gets.chomp.upcase
+
+  until ["Q", "L", "D", "P"].include?(answer)
+    print "\nYour answer was not valid. \nWhat would you like to do now?\nType \"L\" for a list of planets,\nType \"D\" if you want details about a specific planet, \nType \"P\" if you want to add a new planet or,\nType \"Q\" to exit:"
+    answer = gets.chomp.upcase
+  end
+
+  case answer
+    when "L"
+      puts list
+    when "D"
+      puts "\nthis is the list of the planets:"
+      puts list
+      puts "Which planet do you want information on? Please type out the name:"
+      planet = gets.chomp.capitalize
+      until ["Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Uranus", "Neptune"].include?(planet)
+        print "\nYour answer was not valid. \nWhich planet do you want information on? Please type out the name:"
+        planet = gets.chomp.capitalize
+      end
+      puts solar_system.find_planet_by_name(planet).summary
+    when "P"
+      puts "What is the name of this new planet?"
+      name = gets.chomp.capitalize
+      puts "What is the color of this new planet"
+      color = gets.chomp.downcase
+      puts "What is the mass of this planet in kilograms"
+      mass_kg = gets.chomp.to_f
+      puts "What is the distance of this planet from sun in kilometers"
+      distance_from_sun_km = gets.chomp.to_f
+      puts "what is a fun fact about your planet"
+      fun_fact = gets.chomp
+      new_planet = Planet.new(name, color, mass_kg, distance_from_sun_km, fun_fact)
+      solar_system.add_planet(new_planet)
+      list = solar_system.list_planets
+      puts list
+      puts new_planet.summary
+    when "Q"
+      exit
+  end
+
+end
+
+

planet.rb

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+class Planet
+
+  attr_reader :name, :color, :mass_kg, :distance_from_sun_km, :fun_fact
+
+  def initialize(name, color, mass_kg, distance_from_sun_km, fun_fact)
+    raise ArgumentError if mass_kg <= 0
+    raise ArgumentError if distance_from_sun_km <= 0
+
+    @name = name
+    @color = color
+    @mass_kg = mass_kg
+    @distance_from_sun_km = distance_from_sun_km
+    @fun_fact = fun_fact
+  end
+
+  def summary
+    return "#{self.name} is a #{self.color} planet and #{@fun_fact}"
+  end
+end

planet_test.rb

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+require 'minitest'
+require 'minitest/spec'
+require 'minitest/autorun'
+require 'minitest/reporters'
+require 'minitest/pride'
+require "minitest/skip_dsl"
+require 'pry'
+
+require_relative 'planet'
+
+Minitest::Reporters.use! Minitest::Reporters::SpecReporter.new
+
+describe "Solar system excercise" do
+
+  it "Raises and argument error if the value of the planet mass is equal to or smaller than zero" do 
+
+    expect {
+      # What goes inside of the expect {...} is
+      # the line of code that raises the error
+      earth = Planet.new('Earth', 'blue-green', 0, 1.496e8, 'Only planet known to support life')
+    }.must_raise ArgumentError
+  end
+
+  it "Raises and argument error if the value of the planet distance from sun is equal to or smaller than zero" do 
+    expect {
+      earth = Planet.new('Earth', 'blue-green', 1, 0, 'Only planet known to support life')
+    }.must_raise ArgumentError
+  end
+end
+

solar_system.rb

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+class SolarSystem
+
+  attr_reader :star_name, :planets
+
+  def initialize(star_name)
+    @star_name = star_name
+    @planets = Array.new
+  end
+
+  def add_planet(planet)
+    @planets << planet
+  end
+
+  def list_planets
+    list = "Planets orbiting #{@star_name}:"
+    @planets.each_with_index do |planet, index|
+      list += "\n#{index + 1}. #{planet.name}"
+    end
+    return list
+  end
+
+  def find_planet_by_name(planet_name)
+    @planets.each do |planet|
+      return planet if planet.name == planet_name.capitalize 
+    end
+  end
+
+  def distance_between(planet_1, planet_2)
+    distance = 0
+    distance_1 = 1
+    distance_2 = 2
+    @planets.each do |planet|
+      if planet.name == planet_1.capitalize 
+        distance_1 = planet.distance_from_sun_km
+      elsif planet.name == planet_2.capitalize 
+        distance_2 = planet.distance_from_sun_km
+      end
+    end
+
+    if distance_1 > distance_2
+      distance = distance_1 - distance_2
+    else 
+      distance = distance_2 - distance_1
+    end
+    return distance
+  end 
+
+end