API tools faq
paste
ibrahimemin11

InheritanceLabPractice

ibrahimemin11
Aug 1st, 2025
119
0
10 hours
Add comment
Not a member of Pastebin yet? Sign Up, it unlocks many cool features!
Java 29.52 KB | None | 0 0
raw download clone embed print report
  1. package junit_tests;
  2.  
  3. import static org.junit.Assert.*;
  4.  
  5. import org.junit.Test;
  6.  
  7. import model.*;
  8.  
  9. /*
  10.  * Requirement: Any classes you create must reside in the `model` package and be imported properly.
  11.  * For example, creating a new class `Foo` in the `model` package should result in:
  12.  *  import model.Foo;
  13.  *
  14.  * All attributes you declare in the model classes must be private.
  15.  *  If necessary, define public accessors/getters and/or mutators/setters for these private attributes.
  16.  */
  17.  
  18. public class StarterTests {
  19.     /*
  20.      * Programming Requirements:
  21.      *
  22.      *  - You are only allowed to use primitive arrays (e.g., int[], String[], Product[])
  23.      *      for declaring attributes and implementing the idea of collections.
  24.      *  - Any use of a Java library class or method is forbidden
  25.      *      (that is, use selections and loops to build your solution from scratch instead):
  26.      *  - Here are some examples of forbidden classes/methods:
  27.      *      - Arrays class (e.g., Arrays.copyOf)
  28.      *      - System class (e.g., System.arrayCopy)
  29.      *      - ArrayList class
  30.      *      - String class (e.g., substring).
  31.      *  - The use of some library classes does not require an import statement,
  32.      *      but these classes are also forbidden to be used.
  33.      *  - Here are the exceptions (library methods which you are allowed to use if needed):
  34.      *      - String class (equals, format)
  35.      *
  36.      * Violating the above programming requirements will result in a penalty (see lab instructions for details).
  37.      *
  38.      * Tests included in this class serve as documentation on how instances of an Apple AppStore operates.
  39.      *
  40.      * Before attempting this lab, it is expected that you already completed background study materials:
  41.      *  1. Review Tutorial Series on OOP in Java (Part 1 and Part 2):
  42.      *      https://www.eecs.yorku.ca/~jackie/teaching/tutorials/index.html#refurbished_store
  43.      *  2. Written Notes on Reference-Typed, Multi-Valued Attributes:
  44.      *      https://www.eecs.yorku.ca/~jackie/teaching/lectures/2025/S/EECS2030/notes/EECS2030_S25_Tracing_PointCollectorTester.pdf
  45.      *  3. Written Notes on Inferring Classes from JUnit Tests:
  46.      *      https://www.eecs.yorku.ca/~jackie/teaching/lectures/2025/S/EECS2030/notes/EECS2030_S25_Inferring_Classes_from_JUnit.pdf
  47.      *
  48.      * Be sure to also read the following sections from your Lab1 instructions PDF:
  49.      *  - The `Requirements of this Lab` section (page 3)
  50.      *  - Section 2.3 The Building Design Problem
  51.      *  - Section 2.4 Hints and Requirements
  52.      *
  53.      * Programming IDEs such as Eclipse are able to fix some compilation errors for you.
  54.      * However, you are advised to follow the guidance as specified in the written notes above
  55.      * to fix these compilation errors manually, because:
  56.      *  1) it helps you better understand how the intended classes and methods work together; and
  57.      *  2) you may be tested in a written test or exam without the assistance of IDEs.
  58.      */
  59.  
  60.     /*
  61.      * Tests related to the Channel class.
  62.      */
  63.    
  64.     @Test
  65.     public void test_channel_01a() {
  66.         /*
  67.          * Create a channel with the specified name and
  68.          *  maximum 50 followers and maximum 100 videos to release.
  69.          * See the lab manual to see what to expect when a preset maximum is exceeded.
  70.          */
  71.         Channel ch = new Channel("Cafe Music BGM", 50, 100);
  72.         assertEquals("Cafe Music BGM released no videos and has no followers.", ch.toString());
  73.     }
  74.    
  75.     @Test
  76.     public void test_channel_01b() {
  77.         Channel ch = new Channel("Cafe Music BGM", 50, 100);
  78.        
  79.         /*
  80.          * `ch` releases two new videos.
  81.          */
  82.         ch.releaseANewVideo("Monday Jazz");
  83.         assertEquals("Cafe Music BGM released <Monday Jazz> and has no followers.", ch.toString());
  84.        
  85.         ch.releaseANewVideo("Tuesday Jazz");
  86.         assertEquals("Cafe Music BGM released <Monday Jazz, Tuesday Jazz> and has no followers.", ch.toString());
  87.     }
  88.    
  89.     /*
  90.      * Tests related to the Follower classes.
  91.      */
  92.    
  93.     @Test
  94.     public void test_follower_01a() {
  95.         /*
  96.          * Create a subscriber with the specified name and
  97.          *  maximum 20 channels to follow and maximum 40 videos to be recommended by the channels.
  98.          * See the lab manual to see what to expect when a preset maximum is exceeded.
  99.          */
  100.         Follower f = new Subscriber("Alan", 20, 40);
  101.         assertEquals("Subscriber Alan follows no channels and has no recommended videos.", f.toString());
  102.     }
  103.    
  104.     @Test
  105.     public void test_follower_01b() {
  106.         /*
  107.          * Create a monitor with the specified name and maximum 20 channels to follow.
  108.          * See the lab manual to see what to expect when a preset maximum is exceeded.
  109.          */
  110.         Follower f = new Monitor("Stat Sensor A", 20);
  111.         assertEquals("Monitor Stat Sensor A follows no channels.", f.toString());
  112.     }
  113.    
  114.     /*
  115.      * More tests related to the Channel class.
  116.      */
  117.    
  118.     @Test
  119.     public void test_channel_01c() {
  120.         /*
  121.          * Note that the two channels are set with different maximums for
  122.          *  the allowed numbers of followers and videos to release.
  123.          */
  124.         Channel ch1 = new Channel("Cafe Music BGM", 50, 100);
  125.         Channel ch2 = new Channel("I Love You Venice", 60, 135);
  126.        
  127.         /*
  128.          * Note that the followers are set with different maximums for the allowed numbers of channels.
  129.          */
  130.         Follower f1 = new Subscriber("Alan", 20, 40);
  131.         Follower f2 = new Monitor("Stat Sensor A", 60);
  132.        
  133.         /*
  134.          * Let `f1` follow `ch1` (which updates both the context object `ch1` and argument object `f1`).
  135.          *
  136.          * You can assume that a follower, once added to a channel, will not be added to that channel again.
  137.          */
  138.         ch1.follow(f1);
  139.         assertEquals("Cafe Music BGM released no videos and is followed by [Subscriber Alan].", ch1.toString());
  140.         assertEquals("Subscriber Alan follows [Cafe Music BGM] and has no recommended videos.", f1.toString());
  141.        
  142.         /*
  143.          * Let `f2` follow `ch1` (which updates both the context object `ch1` and argument object `f2`).
  144.          */
  145.         ch1.follow(f2);
  146.         assertEquals("Cafe Music BGM released no videos and is followed by [Subscriber Alan, Monitor Stat Sensor A].", ch1.toString());
  147.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM].", f2.toString());
  148.        
  149.         /*
  150.          * Let `f2` follow `ch2` (which updates both the context object `ch2` and argument object `f2`).
  151.          */
  152.         ch2.follow(f2);
  153.         assertEquals("I Love You Venice released no videos and is followed by [Monitor Stat Sensor A].", ch2.toString());
  154.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM, I Love You Venice].", f2.toString());
  155.        
  156.         /*
  157.          * Let `f1` follow `ch2` (which updates both the context object `ch2` and argument object `f1`).
  158.          */
  159.         ch2.follow(f1);
  160.         assertEquals("I Love You Venice released no videos and is followed by [Monitor Stat Sensor A, Subscriber Alan].", ch2.toString());
  161.         assertEquals("Subscriber Alan follows [Cafe Music BGM, I Love You Venice] and has no recommended videos.", f1.toString());
  162.        
  163.         /*
  164.          * Jackie's suggestion: You may test more cases of letting multiple subscribers and/or monitors follow multiple channels.
  165.          */
  166.     }
  167.    
  168.     @Test
  169.     public void test_channel_01d() {
  170.         Channel ch1 = new Channel("Cafe Music BGM", 50, 100);
  171.         Channel ch2 = new Channel("I Love You Venice", 60, 135);
  172.        
  173.         Follower f1 = new Subscriber("Alan", 20, 40);
  174.         Follower f2 = new Monitor("Stat Sensor A", 60);
  175.        
  176.         ch1.follow(f1);
  177.         ch1.follow(f2);
  178.         ch2.follow(f2);
  179.         ch2.follow(f1);
  180.        
  181.         assertEquals("Cafe Music BGM released no videos and is followed by [Subscriber Alan, Monitor Stat Sensor A].", ch1.toString());
  182.         assertEquals("I Love You Venice released no videos and is followed by [Monitor Stat Sensor A, Subscriber Alan].", ch2.toString());
  183.         assertEquals("Subscriber Alan follows [Cafe Music BGM, I Love You Venice] and has no recommended videos.", f1.toString());
  184.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM, I Love You Venice].", f2.toString());
  185.        
  186.         /*
  187.          * Let `f1` stop following `ch1` (which updates both the context object `ch1` and argument object `f1`).
  188.          */
  189.         ch1.unfollow(f1);
  190.        
  191.         assertEquals("Cafe Music BGM released no videos and is followed by [Monitor Stat Sensor A].", ch1.toString());
  192.         assertEquals("I Love You Venice released no videos and is followed by [Monitor Stat Sensor A, Subscriber Alan].", ch2.toString());
  193.         assertEquals("Subscriber Alan follows [I Love You Venice] and has no recommended videos.", f1.toString());
  194.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM, I Love You Venice].", f2.toString());
  195.        
  196.         /*
  197.          * Let `f1` stop following `ch2` (which updates both the context object `ch2` and argument object `f1`).
  198.          */
  199.         ch2.unfollow(f1);
  200.         assertEquals("Cafe Music BGM released no videos and is followed by [Monitor Stat Sensor A].", ch1.toString());
  201.         assertEquals("I Love You Venice released no videos and is followed by [Monitor Stat Sensor A].", ch2.toString());
  202.         assertEquals("Subscriber Alan follows no channels and has no recommended videos.", f1.toString());
  203.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM, I Love You Venice].", f2.toString());
  204.        
  205.         /*
  206.          * Let `f2` stop following `ch2` (which updates both the context object `ch2` and argument object `f2`).
  207.          */
  208.         ch2.unfollow(f2);
  209.         assertEquals("Cafe Music BGM released no videos and is followed by [Monitor Stat Sensor A].", ch1.toString());
  210.         assertEquals("I Love You Venice released no videos and has no followers.", ch2.toString());
  211.         assertEquals("Subscriber Alan follows no channels and has no recommended videos.", f1.toString());
  212.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM].", f2.toString());
  213.        
  214.        
  215.         Follower f3 = new Subscriber("Mark", 20, 45);
  216.         ch2.follow(f3);
  217.         assertEquals("Subscriber Mark follows [I Love You Venice] and has no recommended videos.", f3.toString());
  218.         assertEquals("I Love You Venice released no videos and is followed by [Subscriber Mark].", ch2.toString());
  219.         assertEquals("Cafe Music BGM released no videos and is followed by [Monitor Stat Sensor A].", ch1.toString());
  220.        
  221.  
  222.         ch1.unfollow(f3);
  223.         /*
  224.          * Since `f3` is not following `ch1`, unfollowing it should have no effect.
  225.          */
  226.         assertEquals("Subscriber Mark follows [I Love You Venice] and has no recommended videos.", f3.toString());
  227.         assertEquals("I Love You Venice released no videos and is followed by [Subscriber Mark].", ch2.toString());
  228.         assertEquals("Cafe Music BGM released no videos and is followed by [Monitor Stat Sensor A].", ch1.toString());
  229.        
  230.         /*
  231.          * Jackie's suggestions:
  232.          *  1. You may test more cases of letting a follower stop following a channel
  233.          *      (in cases where the follower is in the beginning, middle, or end of the channel's follower list, and
  234.          *       in cases where the channel is in the beginning, middle, or end of the follower's channel list).
  235.          *  2. You may test more cases of unfollowing a subscriber or monitor from a channel which it does not follow.
  236.          */
  237.     }
  238.    
  239.     @Test
  240.     public void test_channel_02a() {
  241.         Channel ch = new Channel("Cafe Music BGM", 50, 100);
  242.         assertEquals("Cafe Music BGM released no videos and has no followers.", ch.toString());
  243.        
  244.         /*
  245.          * You can assume that no duplicated video names will be released across all channels.
  246.          * That is, names of videos released by all channels are unique.
  247.          *
  248.          * Assume that channel videos, once released, will not be removed.
  249.          */
  250.         ch.releaseANewVideo("Jazz Piano Radio");
  251.         assertEquals("Cafe Music BGM released <Jazz Piano Radio> and has no followers.", ch.toString());
  252.        
  253.         ch.releaseANewVideo("Starbucks Music Playlist 2021");
  254.         assertEquals("Cafe Music BGM released <Jazz Piano Radio, Starbucks Music Playlist 2021> and has no followers.", ch.toString());
  255.        
  256.         Follower f1 = new Subscriber("Alan", 20, 40);
  257.         Follower f2 = new Monitor("Stat Sensor A", 60);
  258.        
  259.         /*
  260.          * Given that `f1` and `f2` only start following `ch` after it released the two videos,
  261.          *  those two videos will not be recommended to `f1` and `f2`.
  262.          *
  263.          * That is, a follower is only recommended videos that are released after they start following a channel.
  264.          */
  265.        
  266.         ch.follow(f1);
  267.         assertEquals("Cafe Music BGM released <Jazz Piano Radio, Starbucks Music Playlist 2021> and is followed by [Subscriber Alan].", ch.toString());
  268.         assertEquals("Subscriber Alan follows [Cafe Music BGM] and has no recommended videos.", f1.toString());
  269.         assertEquals("Monitor Stat Sensor A follows no channels.", f2.toString());
  270.        
  271.         ch.follow(f2);
  272.         assertEquals("Cafe Music BGM released <Jazz Piano Radio, Starbucks Music Playlist 2021> and is followed by [Subscriber Alan, Monitor Stat Sensor A].", ch.toString());
  273.         assertEquals("Subscriber Alan follows [Cafe Music BGM] and has no recommended videos.", f1.toString());
  274.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM].", f2.toString());
  275.     }
  276.    
  277.     @Test
  278.     public void test_channel_02b() {
  279.         Channel ch1 = new Channel("Cafe Music BGM", 50, 100);
  280.         Channel ch2 = new Channel("I Love You Venice", 60, 135);
  281.        
  282.         Follower f1 = new Subscriber("Alan", 20, 40);
  283.         Follower f2 = new Monitor("Stat Sensor A", 30);
  284.         Follower f3 = new Subscriber("Mark", 20, 40);
  285.        
  286.         ch1.follow(f1);
  287.         ch2.follow(f1);
  288.         ch2.follow(f2);
  289.         ch1.follow(f2);
  290.         ch2.follow(f3);
  291.         ch1.follow(f3);
  292.        
  293.         assertEquals("Cafe Music BGM released no videos and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark].", ch1.toString());
  294.         assertEquals("I Love You Venice released no videos and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark].", ch2.toString());
  295.         assertEquals("Subscriber Alan follows [Cafe Music BGM, I Love You Venice] and has no recommended videos.", f1.toString());
  296.         assertEquals("Monitor Stat Sensor A follows [I Love You Venice, Cafe Music BGM].", f2.toString());
  297.         assertEquals("Subscriber Mark follows [I Love You Venice, Cafe Music BGM] and has no recommended videos.", f3.toString());
  298.        
  299.         /*
  300.          * When a video is released by the channel, it is immediately recommended to all its subscribers (not monitors).
  301.          *
  302.          * Hints on implementing `releaseANewVideo`:
  303.          *  See the two updates expressed in the following two assertions.
  304.          */
  305.         ch1.releaseANewVideo("Jazz Piano Radio");
  306.         /* Update 1: video release updated on `ch1` */
  307.         assertEquals("Cafe Music BGM released <Jazz Piano Radio> and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark].", ch1.toString());
  308.         /* Update 2: video recommendation updated on all subscribers: `f1` and `f3` */
  309.         assertEquals("Subscriber Mark follows [I Love You Venice, Cafe Music BGM] and is recommended <Jazz Piano Radio>.", f3.toString());
  310.        
  311.         /* no changes on the other channel and the monitor */
  312.         assertEquals("I Love You Venice released no videos and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark].", ch2.toString());
  313.         assertEquals("Monitor Stat Sensor A follows [I Love You Venice, Cafe Music BGM].", f2.toString());
  314.        
  315.         ch2.releaseANewVideo("Baroque Live Music 24/7");
  316.         /* Update 1: video release updated on `ch2` */
  317.         assertEquals("I Love You Venice released <Baroque Live Music 24/7> and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark].", ch2.toString());
  318.         /* Update 2: video recommendation updated on all subscribers: `f1` and `f3` */
  319.         assertEquals("Subscriber Alan follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", f1.toString());
  320.         assertEquals("Subscriber Mark follows [I Love You Venice, Cafe Music BGM] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", f3.toString());
  321.        
  322.         /* no changes on the other channel and the monitor */
  323.         assertEquals("Cafe Music BGM released <Jazz Piano Radio> and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark].", ch1.toString());
  324.         assertEquals("Monitor Stat Sensor A follows [I Love You Venice, Cafe Music BGM].", f2.toString());
  325.        
  326.         /*
  327.          * Jackie's suggestion: You may test more cases of a channel's new video release causing
  328.          *                          more than one subscribers to be updated on their lists of recommended videos.
  329.          */
  330.     }
  331.    
  332.     @Test
  333.     public void test_channel_03a() {
  334.         Channel ch1 = new Channel("Cafe Music BGM", 50, 100);
  335.         Channel ch2 = new Channel("I Love You Venice", 60, 135);
  336.        
  337.         Subscriber sub1 = new Subscriber("Alan", 20, 40);
  338.         Subscriber sub2 = new Subscriber("Mark", 20, 40);
  339.         Monitor mon1 = new Monitor("Stat Sensor A", 30);
  340.        
  341.         ch1.follow(sub1);
  342.         ch1.follow(mon1);
  343.         ch1.follow(sub2);
  344.        
  345.         ch2.follow(mon1);
  346.         ch2.follow(sub2);
  347.         ch2.follow(sub1);
  348.        
  349.        
  350.         ch1.releaseANewVideo("Jazz Piano Radio");
  351.         ch2.releaseANewVideo("Baroque Live Music 24/7");
  352.        
  353.         assertEquals("Cafe Music BGM released <Jazz Piano Radio> and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark].", ch1.toString());
  354.         assertEquals("I Love You Venice released <Baroque Live Music 24/7> and is followed by [Monitor Stat Sensor A, Subscriber Mark, Subscriber Alan].", ch2.toString());
  355.         assertEquals("Subscriber Alan follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub1.toString());
  356.         assertEquals("Subscriber Mark follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub2.toString());
  357.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM, I Love You Venice].", mon1.toString());
  358.        
  359.         /*
  360.          * Subscriber `sub1` watched Jazz Piano Radio for 20 minutes.
  361.          *
  362.          * After a subscriber watched a recommended video of a channel,
  363.          *  the watch time is immediately used to update the statistics of all that channel's monitors (not subscribers).
  364.          *
  365.          * Assume that the second argument of method `watch` is always an integer specifying the watch time in terms of minutes.
  366.          *
  367.          * Since video names across all channels are assumed to be unique,
  368.          *  the `watch` method should be able to figure out to which channel the specified video name belongs.
  369.          */
  370.         sub1.watch("Jazz Piano Radio", 20);
  371.         /*
  372.          * Statistics for the watched video is updated for `mon1`.
  373.          * For the average watch time, display the value with two digits after the decimal point.
  374.          */
  375.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM {#views: 1, max watch time: 20, avg watch time: 20.00}, I Love You Venice].", mon1.toString());
  376.         /* All other channels and subscribers remain unchanged. */
  377.         assertEquals("Cafe Music BGM released <Jazz Piano Radio> and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark].", ch1.toString());
  378.         assertEquals("I Love You Venice released <Baroque Live Music 24/7> and is followed by [Monitor Stat Sensor A, Subscriber Mark, Subscriber Alan].", ch2.toString());
  379.         assertEquals("Subscriber Alan follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub1.toString());
  380.         assertEquals("Subscriber Mark follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub2.toString());
  381.        
  382.         /*
  383.          * Subscriber `sub2` watched Jazz Piano Radio for 30 minutes.
  384.          */
  385.         sub2.watch("Jazz Piano Radio", 30);
  386.         /*
  387.          * Statistics for the watched video is updated for `mon1`.
  388.          */
  389.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM {#views: 2, max watch time: 30, avg watch time: 25.00}, I Love You Venice].", mon1.toString());
  390.         /* All other channels and subscribers remain unchanged. */
  391.         assertEquals("Cafe Music BGM released <Jazz Piano Radio> and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark].", ch1.toString());
  392.         assertEquals("I Love You Venice released <Baroque Live Music 24/7> and is followed by [Monitor Stat Sensor A, Subscriber Mark, Subscriber Alan].", ch2.toString());
  393.         assertEquals("Subscriber Alan follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub1.toString());
  394.         assertEquals("Subscriber Mark follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub2.toString());
  395.        
  396.         /*
  397.          * Subscriber `sub1` watched Jazz Piano Radio again for 15 minutes.
  398.          */
  399.         sub1.watch("Jazz Piano Radio", 15);
  400.         /*
  401.          * Statistics for the watched video is updated for `mon1`.
  402.          */
  403.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM {#views: 3, max watch time: 30, avg watch time: 21.67}, I Love You Venice].", mon1.toString());
  404.         /* All other channels and subscribers remain unchanged. */
  405.         assertEquals("Cafe Music BGM released <Jazz Piano Radio> and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark].", ch1.toString());
  406.         assertEquals("I Love You Venice released <Baroque Live Music 24/7> and is followed by [Monitor Stat Sensor A, Subscriber Mark, Subscriber Alan].", ch2.toString());
  407.         assertEquals("Subscriber Alan follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub1.toString());
  408.         assertEquals("Subscriber Mark follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub2.toString());
  409.        
  410.         /*
  411.          * Subscriber `sub2` watched Baroque Live Music 24/7 for 11 minutes.
  412.          */
  413.         sub2.watch("Baroque Live Music 24/7", 11);
  414.         /*
  415.          * Statistics for the watched video is updated for `mon1`.
  416.          */
  417.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM {#views: 3, max watch time: 30, avg watch time: 21.67}, I Love You Venice {#views: 1, max watch time: 11, avg watch time: 11.00}].", mon1.toString());
  418.         /* All other channels and subscribers remain unchanged. */
  419.         assertEquals("Cafe Music BGM released <Jazz Piano Radio> and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark].", ch1.toString());
  420.         assertEquals("I Love You Venice released <Baroque Live Music 24/7> and is followed by [Monitor Stat Sensor A, Subscriber Mark, Subscriber Alan].", ch2.toString());
  421.         assertEquals("Subscriber Alan follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub1.toString());
  422.         assertEquals("Subscriber Mark follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub2.toString());
  423.         /*
  424.          * Subscriber `sub1` watched Baroque Live Music 24/7 for 8 minutes.
  425.          */
  426.         sub1.watch("Baroque Live Music 24/7", 8);
  427.         /*
  428.          * Statistics for the watched video is updated for `mon1`.
  429.          */
  430.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM {#views: 3, max watch time: 30, avg watch time: 21.67}, I Love You Venice {#views: 2, max watch time: 11, avg watch time: 9.50}].", mon1.toString());
  431.         /* All other channels and subscribers remain unchanged. */
  432.         assertEquals("Cafe Music BGM released <Jazz Piano Radio> and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark].", ch1.toString());
  433.         assertEquals("I Love You Venice released <Baroque Live Music 24/7> and is followed by [Monitor Stat Sensor A, Subscriber Mark, Subscriber Alan].", ch2.toString());
  434.         assertEquals("Subscriber Alan follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub1.toString());
  435.         assertEquals("Subscriber Mark follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub2.toString());
  436.        
  437.         /*
  438.          * Subscriber `sub2` watched Baroque Live Music 24/7 again for 18 minutes.
  439.          */
  440.         sub2.watch("Baroque Live Music 24/7", 18);
  441.         /*
  442.          * Statistics for the watched video is updated for `mon1`.
  443.          */
  444.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM {#views: 3, max watch time: 30, avg watch time: 21.67}, I Love You Venice {#views: 3, max watch time: 18, avg watch time: 12.33}].", mon1.toString());
  445.         /* All other channels and subscribers remain unchanged. */
  446.         assertEquals("Cafe Music BGM released <Jazz Piano Radio> and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark].", ch1.toString());
  447.         assertEquals("I Love You Venice released <Baroque Live Music 24/7> and is followed by [Monitor Stat Sensor A, Subscriber Mark, Subscriber Alan].", ch2.toString());
  448.         assertEquals("Subscriber Alan follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub1.toString());
  449.         assertEquals("Subscriber Mark follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub2.toString());
  450.     }
  451.    
  452.     @Test
  453.     public void test_channel_03b() {
  454.         Channel ch1 = new Channel("Cafe Music BGM", 50, 100);
  455.         Channel ch2 = new Channel("I Love You Venice", 60, 135);
  456.        
  457.         Subscriber sub1 = new Subscriber("Alan", 20, 40);
  458.         Subscriber sub2 = new Subscriber("Mark", 20, 40);
  459.         Monitor mon1 = new Monitor("Stat Sensor A", 30);
  460.        
  461.         ch1.follow(sub1);
  462.         ch1.follow(mon1);
  463.         ch1.follow(sub2);
  464.        
  465.         ch2.follow(mon1);
  466.         ch2.follow(sub2);
  467.         ch2.follow(sub1);
  468.        
  469.        
  470.         ch1.releaseANewVideo("Jazz Piano Radio");
  471.         ch2.releaseANewVideo("Baroque Live Music 24/7");
  472.        
  473.         assertEquals("Cafe Music BGM released <Jazz Piano Radio> and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark].", ch1.toString());
  474.         assertEquals("I Love You Venice released <Baroque Live Music 24/7> and is followed by [Monitor Stat Sensor A, Subscriber Mark, Subscriber Alan].", ch2.toString());
  475.         assertEquals("Subscriber Alan follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub1.toString());
  476.         assertEquals("Subscriber Mark follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub2.toString());
  477.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM, I Love You Venice].", mon1.toString());
  478.        
  479.         /*
  480.          * Subscriber `sub1` watched Jazz Piano Radio for 40 minutes.
  481.          */
  482.         sub1.watch("Jazz Piano Radio", 40);
  483.        
  484.         /*
  485.          * Statistics for the watched video is updated for `mon1`.
  486.          * For the average watch time, display with two digits after the decimal point.
  487.          */
  488.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM {#views: 1, max watch time: 40, avg watch time: 40.00}, I Love You Venice].", mon1.toString());
  489.         /* All other channels and subscribers remain unchanged. */
  490.         assertEquals("Cafe Music BGM released <Jazz Piano Radio> and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark].", ch1.toString());
  491.         assertEquals("I Love You Venice released <Baroque Live Music 24/7> and is followed by [Monitor Stat Sensor A, Subscriber Mark, Subscriber Alan].", ch2.toString());
  492.         assertEquals("Subscriber Alan follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub1.toString());
  493.         assertEquals("Subscriber Mark follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub2.toString());
  494.        
  495.         Monitor mon2 = new Monitor("Stat Sensor B", 30);
  496.         assertEquals("Monitor Stat Sensor B follows no channels.", mon2.toString());
  497.        
  498.         /*
  499.          * Let `mon2` start following `ch1`, meaning that
  500.          *  its statistics only covers the watch times happening from now on.
  501.          */
  502.         ch1.follow(mon2);
  503.         assertEquals("Monitor Stat Sensor B follows [Cafe Music BGM].", mon2.toString());
  504.         assertEquals("Cafe Music BGM released <Jazz Piano Radio> and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark, Monitor Stat Sensor B].", ch1.toString());
  505.        
  506.         /*
  507.          * Subscriber `sub2` watched Jazz Piano Radio for 30 minutes.
  508.          */
  509.         sub2.watch("Jazz Piano Radio", 30);
  510.  
  511.         /*
  512.          * Statistics for the watched video is updated for `mon1` and `mon2`.
  513.          */
  514.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM {#views: 2, max watch time: 40, avg watch time: 35.00}, I Love You Venice].", mon1.toString());
  515.         assertEquals("Monitor Stat Sensor B follows [Cafe Music BGM {#views: 1, max watch time: 30, avg watch time: 30.00}].", mon2.toString());
  516.         /* All other channels and subscribers remain unchanged. */
  517.         assertEquals("Cafe Music BGM released <Jazz Piano Radio> and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark, Monitor Stat Sensor B].", ch1.toString());
  518.         assertEquals("I Love You Venice released <Baroque Live Music 24/7> and is followed by [Monitor Stat Sensor A, Subscriber Mark, Subscriber Alan].", ch2.toString());
  519.         assertEquals("Subscriber Alan follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub1.toString());
  520.         assertEquals("Subscriber Mark follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub2.toString());
  521.        
  522.         /*
  523.          * Subscriber `sub1` watched Jazz Piano Radio again for 15 minutes.
  524.          */
  525.         sub2.watch("Jazz Piano Radio", 15);
  526.        
  527.         /*
  528.          * Statistics for the watched video is updated for `mon1` and `mon2`.
  529.          */
  530.         assertEquals("Monitor Stat Sensor A follows [Cafe Music BGM {#views: 3, max watch time: 40, avg watch time: 28.33}, I Love You Venice].", mon1.toString());
  531.         assertEquals("Monitor Stat Sensor B follows [Cafe Music BGM {#views: 2, max watch time: 30, avg watch time: 22.50}].", mon2.toString());
  532.         /* All other channels and subscribers remain unchanged. */
  533.         assertEquals("Cafe Music BGM released <Jazz Piano Radio> and is followed by [Subscriber Alan, Monitor Stat Sensor A, Subscriber Mark, Monitor Stat Sensor B].", ch1.toString());
  534.         assertEquals("I Love You Venice released <Baroque Live Music 24/7> and is followed by [Monitor Stat Sensor A, Subscriber Mark, Subscriber Alan].", ch2.toString());
  535.         assertEquals("Subscriber Alan follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub1.toString());
  536.         assertEquals("Subscriber Mark follows [Cafe Music BGM, I Love You Venice] and is recommended <Jazz Piano Radio, Baroque Live Music 24/7>.", sub2.toString());
  537.     }
  538.    
  539. }
Advertisement
Add Comment
Please, Sign In to add comment
Public Pastes
We use cookies for various purposes including analytics. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy.  OK, I Understand
Not a member of Pastebin yet?
Sign Up, it unlocks many cool features!