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MusicAppTest

A simple Android app that contains a list with different numbers of cells on each row. It represents an implemented Music Player.

MusicPlayer Module (Logic Only)

Three entities implement Music Player:

  • User: Represents the user of the Music Player.
  • Music: Represents the music that is used to play in the Music Player.
  • Player: Implements the Music Player operations.

Entities

User has only one property named type that represents the type of the user, whether REGULAR or PREMIUM.

Music has three properties:

  • id that assigns an ID to each music and is used for identification.
  • state that holds the playing state of the music, whether PLAYING or STOPPED.
  • duration that holds the music playback time in milliseconds.
    Also, Music comprises play, pause, and stop functions of itself.

Player has one property: musicQueue that holds the Music Queue of the player. Also, Player comprises methods for managing the Player functionalities, e.g., getPlayingMusic() and addMusicToQueue().

Exceptions

There are three classes of Exceptions:

  • IllegalOperationException: Is thrown when the user wants to do a not-allowed operation in MusicPlayer, e.g., pausing a previously paused music.
  • IllegalQueueSizeException: Is thrown when the user wants to use a queue with a not-allowed size.
  • NotPremiumUserException: Is thrown when a Regular User wants to use a Premium-Only feature.

Tests

Four classes test MusicPlayer functionalities by JUnit 5:

  • PlayerRegularUserTest: Tests the features which are dependent on the type of user with a Regular User.
  • PlayerPremiumUserTest: Tests the features which are dependent on the type of user with a Premium User.
  • PlayerGeneralTest: It is a Test Suite that tests the general features of the player, independent from user type.
  • PlayerTestSuite: Tests all these three Test classes, It covers functionalities of the Player entity.

App Module (Presentation Layer Only)

A simple list presentation that has one cell on even index rows and two cells on odd index ones. The colors of cells are set randomly.