Intro to Android Testing

Originally presented at DevFest Conakry 2018 in Guinea, West Africa.

https://www.meetup.com/Meetup-GDG-Conakry/events/253639851/

In this talk we'll cover why it's important to test your app, and the different types of testing frameworks available for Android including local unit tests, instrumentation tests, and Espresso.

Transcript

1. Intro to Android Testing Charles “Chuck” Greb @ecgreb DevFest Conakry December 1st, 2018
4. • Software Engineer • Mobile applications since 2009 • Mostly Android • Button About me
5. Why test?
6. • Verify code is correct • Prevent regressions • Documentation Why test?
7. Testing Strategies
8. • Don’t test • Manual • Automation Testing Strategies
9. Types of Automated Tests
10. • Unit • Integration • User Interface (UI) Types of Automated Tests
11. Testing Pyramid https://martinfowler.com/bliki/TestPyramid.html
12. Android Testing Pyramid
15. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }+ }+ }+
16. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }+ }+ }+
17. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() } reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }+ }+ }+
18. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() } reset_button.setOnClickListener { counter_view.text = counter.reset().toString() } } }
19. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }+ }+ }+
20. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }+ }+ }+
21. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }+ }+ }+
22. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }+ }+ }+
23. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }+ }+ }+
24. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }_ }+ }+
25. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }_ }+ }+
26. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }_ }+ }+
27. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }_ }+ }+
28. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }_ }+ }+
29. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }_ }+ }+
30. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }_ }+ }+
31. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }_ }+ }+
32. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }_ }+ }+
33. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }_ }+ }+
34. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) val counter = Counter() counter_view.text = counter.reset().toString() count_button.setOnClickListener { counter_view.text = counter.count().toString() }+ reset_button.setOnClickListener { counter_view.text = counter.reset().toString() }+ }+ }+
35. class Counter { private var count = 0 fun count(): Int { count++ return count }+ fun reset(): Int { count = 0 return count }+ }
36. class Counter { private var count = 0 fun count(): Int { count++ return count }+ fun reset(): Int { count = 0 return count }+ }
37. class Counter { private var count = 0 fun count(): Int { count++ return count }+ fun reset(): Int { count = 0 return count }+ }
38. class Counter { private var count = 0 fun count(): Int { count++ return count }+ fun reset(): Int { count = 0 return count }+ }
39. class Counter { private var count = 0 fun count(): Int { count++ return count }+ fun reset(): Int { count = 0 return count }+ }
40. class Counter { private var count = 0 fun count(): Int { count++ return count }+ fun reset(): Int { count = 0 return count }+ }
41. class Counter { private var count = 0 fun count(): Int { count++ return count }_ fun reset(): Int { count = 0 return count }+ }
42. class Counter { private var count = 0 fun count(): Int { count++ return count }_ fun reset(): Int { count = 0 return count }+ }
43. class Counter { private var count = 0 fun count(): Int { count++ return count }_ fun reset(): Int { count = 0 return count }+ }
44. class Counter { private var count = 0 fun count(): Int { count++ return count }+ fun reset(): Int { count = 0 return count }+ }
46. MainActivity
47. MainActivity Counter
48. MainActivity Counter
49. MainActivity Counter
50. MainActivity Counter CounterTest JUnit
51. MainActivity Counter MainActivityTest CounterTest JUnit Instrumentation
52. MainActivity Counter MainActivityTest CounterTest MainActivityUiTest JUnit Instrumentation Espresso
53. Unit Tests JUnit
54. class CounterTest { @Test fun shouldNotBeNull() { val counter = Counter() assertNotNull(counter) }+ @Test fun reset_shouldReturnZero() { val counter = Counter() assertEquals(0, counter.reset()) }a @Test fun count_shouldIncrementNumber() { val counter = Counter() assertEquals(1, counter.count()) assertEquals(2, counter.count()) assertEquals(3, counter.count())
55. class CounterTest { @Test fun shouldNotBeNull() { val counter = Counter() assertNotNull(counter) }+ @Test fun reset_shouldReturnZero() { val counter = Counter() assertEquals(0, counter.reset()) }a @Test fun count_shouldIncrementNumber() { val counter = Counter() assertEquals(1, counter.count()) assertEquals(2, counter.count()) assertEquals(3, counter.count())
56. class CounterTest { @Test+ fun shouldNotBeNull() { val counter = Counter()+ assertNotNull(counter) }+ @Test fun reset_shouldReturnZero() { val counter = Counter() assertEquals(0, counter.reset()) }a @Test fun count_shouldIncrementNumber() { val counter = Counter() assertEquals(1, counter.count()) assertEquals(2, counter.count()) assertEquals(3, counter.count())
57. class CounterTest { @Test+ fun shouldNotBeNull() { val counter = Counter()+ assertNotNull(counter) }+ @Test fun reset_shouldReturnZero() { val counter = Counter() assertEquals(0, counter.reset()) }a @Test fun count_shouldIncrementNumber() { val counter = Counter() assertEquals(1, counter.count()) assertEquals(2, counter.count()) assertEquals(3, counter.count())
58. class CounterTest { @Test+ fun shouldNotBeNull() { val counter = Counter()+ assertNotNull(counter) }+ @Test fun reset_shouldReturnZero() { val counter = Counter() assertEquals(0, counter.reset()) }a @Test fun count_shouldIncrementNumber() { val counter = Counter() assertEquals(1, counter.count()) assertEquals(2, counter.count()) assertEquals(3, counter.count())
59. class CounterTest { @Test+ fun shouldNotBeNull() { val counter = Counter()+ assertNotNull(counter) }+ @Test fun reset_shouldReturnZero() { val counter = Counter() assertEquals(0, counter.reset()) }a @Test fun count_shouldIncrementNumber() { val counter = Counter() assertEquals(1, counter.count()) assertEquals(2, counter.count()) assertEquals(3, counter.count())
60. class CounterTest { @Test+ fun shouldNotBeNull() { val counter = Counter()+ assertNotNull(counter) }+ @Test fun reset_shouldReturnZero() { val counter = Counter() assertEquals(0, counter.reset()) }a @Test fun count_shouldIncrementNumber() { val counter = Counter() assertEquals(1, counter.count()) assertEquals(2, counter.count()) assertEquals(3, counter.count())
61. class CounterTest { @Test+ fun shouldNotBeNull() { val counter = Counter()+ assertNotNull(counter) }+ @Test fun reset_shouldReturnZero() { val counter = Counter() assertEquals(0, counter.reset()) }a @Test fun count_shouldIncrementNumber() { val counter = Counter() assertEquals(1, counter.count()) assertEquals(2, counter.count()) assertEquals(3, counter.count())
62. class CounterTest { @Test+ fun shouldNotBeNull() { val counter = Counter()+ assertNotNull(counter) }+ @Test fun reset_shouldReturnZero() { val counter = Counter() assertEquals(0, counter.reset()) }a @Test fun count_shouldIncrementNumber() { val counter = Counter() assertEquals(1, counter.count()) assertEquals(2, counter.count()) assertEquals(3, counter.count())
63. assertEquals(0, counter.reset()) }a @Test fun count_shouldIncrementNumber() { val counter = Counter() assertEquals(1, counter.count()) assertEquals(2, counter.count()) assertEquals(3, counter.count()) }b @Test fun reset_shouldResetCounter() { val counter = Counter() counter.count() counter.count() counter.count() counter.reset() assertEquals(1, counter.count()) }c }d
64. assertEquals(0, counter.reset()) }a @Testc fun count_shouldIncrementNumber() { val counter = Counter()c assertEquals(1, counter.count())c assertEquals(2, counter.count()) assertEquals(3, counter.count()) }b @Test fun reset_shouldResetCounter() { val counter = Counter() counter.count() counter.count() counter.count() counter.reset() assertEquals(1, counter.count()) }c }d
65. assertEquals(0, counter.reset()) }a @Testc fun count_shouldIncrementNumber() { val counter = Counter()c assertEquals(1, counter.count())c assertEquals(2, counter.count()) assertEquals(3, counter.count()) }b @Test fun reset_shouldResetCounter() { val counter = Counter() counter.count() counter.count() counter.count() counter.reset() assertEquals(1, counter.count()) }c }d
66. assertEquals(0, counter.reset()) }a @Testc fun count_shouldIncrementNumber() { val counter = Counter()c assertEquals(1, counter.count())c assertEquals(2, counter.count()) assertEquals(3, counter.count()) }b @Test fun reset_shouldResetCounter() { val counter = Counter() counter.count() counter.count() counter.count() counter.reset() assertEquals(1, counter.count()) }c }d
67. assertEquals(0, counter.reset()) }a @Testc fun count_shouldIncrementNumber() { val counter = Counter()c assertEquals(1, counter.count())c assertEquals(2, counter.count()) assertEquals(3, counter.count()) }b @Test fun reset_shouldResetCounter() { val counter = Counter() counter.count() counter.count() counter.count() counter.reset() assertEquals(1, counter.count()) }c }d
68. assertEquals(0, counter.reset()) }a @Testc fun count_shouldIncrementNumber() { val counter = Counter()c assertEquals(1, counter.count())c assertEquals(2, counter.count()) assertEquals(3, counter.count()) }b @Test fun reset_shouldResetCounter() { val counter = Counter() counter.count() counter.count() counter.count() counter.reset() assertEquals(1, counter.count()) }c }d
69. assertEquals(0, counter.reset()) }a @Testc fun count_shouldIncrementNumber() { val counter = Counter()c assertEquals(1, counter.count())c assertEquals(2, counter.count()) assertEquals(3, counter.count()) }b @Test fun reset_shouldResetCounter() { val counter = Counter() counter.count() counter.count() counter.count() counter.reset() assertEquals(1, counter.count()) }c }d
70. assertEquals(0, counter.reset()) }a @Testc fun count_shouldIncrementNumber() { val counter = Counter()c assertEquals(1, counter.count())c assertEquals(2, counter.count()) assertEquals(3, counter.count()) }b @Test fun reset_shouldResetCounter() { val counter = Counter() counter.count() counter.count() counter.count() counter.reset() assertEquals(1, counter.count()) }c }d
71. assertEquals(0, counter.reset()) }a @Testc fun count_shouldIncrementNumber() { val counter = Counter()c assertEquals(1, counter.count())c assertEquals(2, counter.count()) assertEquals(3, counter.count()) }b @Test fun reset_shouldResetCounter() { val counter = Counter() counter.count() counter.count() counter.count() counter.reset() assertEquals(1, counter.count()) }c }d
72. assertEquals(0, counter.reset()) }a @Testc fun count_shouldIncrementNumber() { val counter = Counter()c assertEquals(1, counter.count())c assertEquals(2, counter.count()) assertEquals(3, counter.count()) }b @Test fun reset_shouldResetCounter() { val counter = Counter() counter.count() counter.count() counter.count() counter.reset() assertEquals(1, counter.count()) }c }d
73. assertEquals(0, counter.reset()) }a @Testc fun count_shouldIncrementNumber() { val counter = Counter()c assertEquals(1, counter.count())c assertEquals(2, counter.count()) assertEquals(3, counter.count()) }b @Test fun reset_shouldResetCounter() { val counter = Counter() counter.count() counter.count() counter.count() counter.reset() assertEquals(1, counter.count()) }c }d
75. Integration Tests Instrumentation
76. @RunWith(AndroidJUnit4::class) class MainActivityTest { @get:Rule val activityTestRule: ActivityTestRule<MainActivity> = ActivityTestRule(MainActivity::class.java, false, false) @Before fun setUp() { activityTestRule.launchActivity(Intent()) }a @Test fun shouldNotBeNull() { assertNotNull(activityTestRule.activity) }b @Test fun counterView_shouldDisplayZeroOnCreate() { assertEquals("0", activityTestRule.activity.counter_view.text)
77. @RunWith(AndroidJUnit4::class) class MainActivityTest { @get:Rule val activityTestRule: ActivityTestRule<MainActivity> = ActivityTestRule(MainActivity::class.java, false, false) @Before fun setUp() { activityTestRule.launchActivity(Intent()) }a @Test fun shouldNotBeNull() { assertNotNull(activityTestRule.activity) }b @Test fun counterView_shouldDisplayZeroOnCreate() { assertEquals("0", activityTestRule.activity.counter_view.text)
78. @RunWith(AndroidJUnit4::class) class MainActivityTest { @get:Rule val activityTestRule: ActivityTestRule<MainActivity> = ActivityTestRule(MainActivity::class.java, false, false) @Before fun setUp() { activityTestRule.launchActivity(Intent()) }a @Test fun shouldNotBeNull() { assertNotNull(activityTestRule.activity) }b @Test fun counterView_shouldDisplayZeroOnCreate() { assertEquals("0", activityTestRule.activity.counter_view.text)
79. @RunWith(AndroidJUnit4::class) class MainActivityTest { @get:Rule val activityTestRule: ActivityTestRule<MainActivity> = ActivityTestRule(MainActivity::class.java, false, false) @Before fun setUp() { activityTestRule.launchActivity(Intent()) }a @Test fun shouldNotBeNull() { assertNotNull(activityTestRule.activity) }b @Test fun counterView_shouldDisplayZeroOnCreate() { assertEquals("0", activityTestRule.activity.counter_view.text)
80. @RunWith(AndroidJUnit4::class) class MainActivityTest { @get:Rule val activityTestRule: ActivityTestRule<MainActivity> = ActivityTestRule(MainActivity::class.java, false, false) @Before fun setUp() { activityTestRule.launchActivity(Intent()) }a @Test fun shouldNotBeNull() { assertNotNull(activityTestRule.activity) }b @Test fun counterView_shouldDisplayZeroOnCreate() { assertEquals("0", activityTestRule.activity.counter_view.text)
81. @RunWith(AndroidJUnit4::class) class MainActivityTest { @get:Rule val activityTestRule: ActivityTestRule<MainActivity> = ActivityTestRule(MainActivity::class.java, false, false) @Before fun setUp() { activityTestRule.launchActivity(Intent()) }a @Test fun shouldNotBeNull() { assertNotNull(activityTestRule.activity) }b @Test fun counterView_shouldDisplayZeroOnCreate() { assertEquals("0", activityTestRule.activity.counter_view.text)
82. @Test fun shouldNotBeNull() { assertNotNull(activityTestRule.activity) }b @Test fun counterView_shouldDisplayZeroOnCreate() { assertEquals("0", activityTestRule.activity.counter_view.text) }c @Test @UiThreadTest fun counterView_shouldDisplayNewCountOnCountButtonClick() { activityTestRule.activity.count_button.performClick() assertEquals("1", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick() assertEquals("2", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick() assertEquals("3", activityTestRule.activity.counter_view.text) }
83. @Test+ fun shouldNotBeNull() { assertNotNull(activityTestRule.activity) }b @Test fun counterView_shouldDisplayZeroOnCreate() { assertEquals("0", activityTestRule.activity.counter_view.text) }c @Test @UiThreadTest fun counterView_shouldDisplayNewCountOnCountButtonClick() { activityTestRule.activity.count_button.performClick() assertEquals("1", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick() assertEquals("2", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick() assertEquals("3", activityTestRule.activity.counter_view.text) }
84. @Test+ fun shouldNotBeNull() { assertNotNull(activityTestRule.activity) }b @Test fun counterView_shouldDisplayZeroOnCreate() { assertEquals("0", activityTestRule.activity.counter_view.text) }c @Test @UiThreadTest fun counterView_shouldDisplayNewCountOnCountButtonClick() { activityTestRule.activity.count_button.performClick() assertEquals("1", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick() assertEquals("2", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick() assertEquals("3", activityTestRule.activity.counter_view.text) }
85. @Test fun shouldNotBeNull() { assertNotNull(activityTestRule.activity) }b @Test fun counterView_shouldDisplayZeroOnCreate() { assertEquals("0", activityTestRule.activity.counter_view.text) }c @Test @UiThreadTest+ fun counterView_shouldDisplayNewCountOnCountButtonClick() { activityTestRule.activity.count_button.performClick()+ assertEquals("1", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("2", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("3", activityTestRule.activity.counter_view.text) }+
86. @Test fun shouldNotBeNull() { assertNotNull(activityTestRule.activity) }b @Test fun counterView_shouldDisplayZeroOnCreate() { assertEquals("0", activityTestRule.activity.counter_view.text) }c @Test @UiThreadTest+ fun counterView_shouldDisplayNewCountOnCountButtonClick() { activityTestRule.activity.count_button.performClick()+ assertEquals("1", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("2", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("3", activityTestRule.activity.counter_view.text) }+
87. @Test fun shouldNotBeNull() { assertNotNull(activityTestRule.activity) }b @Test fun counterView_shouldDisplayZeroOnCreate() { assertEquals("0", activityTestRule.activity.counter_view.text) }c @Test @UiThreadTest+ fun counterView_shouldDisplayNewCountOnCountButtonClick() { activityTestRule.activity.count_button.performClick()+ assertEquals("1", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("2", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("3", activityTestRule.activity.counter_view.text) }+
88. @Test fun shouldNotBeNull() { assertNotNull(activityTestRule.activity) }b @Test fun counterView_shouldDisplayZeroOnCreate() { assertEquals("0", activityTestRule.activity.counter_view.text) }c @Test @UiThreadTest+ fun counterView_shouldDisplayNewCountOnCountButtonClick() { activityTestRule.activity.count_button.performClick()+ assertEquals("1", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("2", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("3", activityTestRule.activity.counter_view.text) }+
89. @Test fun shouldNotBeNull() { assertNotNull(activityTestRule.activity) }b @Test fun counterView_shouldDisplayZeroOnCreate() { assertEquals("0", activityTestRule.activity.counter_view.text) }c @Test @UiThreadTest+ fun counterView_shouldDisplayNewCountOnCountButtonClick() { activityTestRule.activity.count_button.performClick()+ assertEquals("1", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("2", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("3", activityTestRule.activity.counter_view.text) }+
90. @Test fun shouldNotBeNull() { assertNotNull(activityTestRule.activity) }b @Test fun counterView_shouldDisplayZeroOnCreate() { assertEquals("0", activityTestRule.activity.counter_view.text) }c @Test @UiThreadTest+ fun counterView_shouldDisplayNewCountOnCountButtonClick() { activityTestRule.activity.count_button.performClick()+ assertEquals("1", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("2", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("3", activityTestRule.activity.counter_view.text) }+
91. @Test fun shouldNotBeNull() { assertNotNull(activityTestRule.activity) }b @Test fun counterView_shouldDisplayZeroOnCreate() { assertEquals("0", activityTestRule.activity.counter_view.text) }c @Test @UiThreadTest+ fun counterView_shouldDisplayNewCountOnCountButtonClick() { activityTestRule.activity.count_button.performClick()+ assertEquals("1", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("2", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("3", activityTestRule.activity.counter_view.text) }+
92. @Test @UiThreadTest+ fun counterView_shouldDisplayNewCountOnCountButtonClick() { activityTestRule.activity.count_button.performClick()+ assertEquals("1", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("2", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("3", activityTestRule.activity.counter_view.text) }+ @Test @UiThreadTest fun counterView_shouldDisplayZeroOnResetButtonClick() { activityTestRule.activity.count_button.performClick() activityTestRule.activity.count_button.performClick() activityTestRule.activity.count_button.performClick() activityTestRule.activity.reset_button.performClick() assertEquals("0", activityTestRule.activity.counter_view.text) } }
93. @Test @UiThreadTest+ fun counterView_shouldDisplayNewCountOnCountButtonClick() { activityTestRule.activity.count_button.performClick()+ assertEquals("1", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("2", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("3", activityTestRule.activity.counter_view.text) }+ @Test @UiThreadTest fun counterView_shouldDisplayZeroOnResetButtonClick() { activityTestRule.activity.count_button.performClick() activityTestRule.activity.count_button.performClick() activityTestRule.activity.count_button.performClick() activityTestRule.activity.reset_button.performClick() assertEquals("0", activityTestRule.activity.counter_view.text) }+ }-
94. @Test @UiThreadTest+ fun counterView_shouldDisplayNewCountOnCountButtonClick() { activityTestRule.activity.count_button.performClick()+ assertEquals("1", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("2", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("3", activityTestRule.activity.counter_view.text) }+ @Test @UiThreadTest fun counterView_shouldDisplayZeroOnResetButtonClick() { activityTestRule.activity.count_button.performClick() activityTestRule.activity.count_button.performClick() activityTestRule.activity.count_button.performClick() activityTestRule.activity.reset_button.performClick() assertEquals("0", activityTestRule.activity.counter_view.text) }+ }--
95. @Test @UiThreadTest+ fun counterView_shouldDisplayNewCountOnCountButtonClick() { activityTestRule.activity.count_button.performClick()+ assertEquals("1", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("2", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("3", activityTestRule.activity.counter_view.text) }+ @Test @UiThreadTest fun counterView_shouldDisplayZeroOnResetButtonClick() { activityTestRule.activity.count_button.performClick() activityTestRule.activity.count_button.performClick() activityTestRule.activity.count_button.performClick() activityTestRule.activity.reset_button.performClick() assertEquals("0", activityTestRule.activity.counter_view.text) }+ }-
96. @Test @UiThreadTest+ fun counterView_shouldDisplayNewCountOnCountButtonClick() { activityTestRule.activity.count_button.performClick()+ assertEquals("1", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("2", activityTestRule.activity.counter_view.text) activityTestRule.activity.count_button.performClick()+ assertEquals("3", activityTestRule.activity.counter_view.text) }+ @Test @UiThreadTest fun counterView_shouldDisplayZeroOnResetButtonClick() { activityTestRule.activity.count_button.performClick() activityTestRule.activity.count_button.performClick() activityTestRule.activity.count_button.performClick() activityTestRule.activity.reset_button.performClick() assertEquals("0", activityTestRule.activity.counter_view.text) }+ }-
98. UI Tests Espresso
99. @RunWith(AndroidJUnit4::class) class MainActivityUiTest { @get:Rule val activityTestRule: ActivityTestRule<MainActivity> = ActivityTestRule(MainActivity::class.java, false, false) @Before fun setUp() { activityTestRule.launchActivity(Intent()) }a @Test fun counterView_shouldDisplayZeroOnCreate() { onView(withId(R.id.counter_view)).check(matches(withText("0"))) }a @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click())
100. @RunWith(AndroidJUnit4::class) class MainActivityUiTest { @get:Rule val activityTestRule: ActivityTestRule<MainActivity> = ActivityTestRule(MainActivity::class.java, false, false) @Before fun setUp() { activityTestRule.launchActivity(Intent()) }a @Test fun counterView_shouldDisplayZeroOnCreate() { onView(withId(R.id.counter_view)).check(matches(withText("0"))) }a @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click())
101. @RunWith(AndroidJUnit4::class) class MainActivityUiTest { @get:Rule val activityTestRule: ActivityTestRule<MainActivity> = ActivityTestRule(MainActivity::class.java, false, false) @Before fun setUp() { activityTestRule.launchActivity(Intent()) }a @Test+ fun counterView_shouldDisplayZeroOnCreate() { +onView(withId(R.id.counter_view)).check(matches(withText(“0"))) }b @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click())
102. @RunWith(AndroidJUnit4::class) class MainActivityUiTest { @get:Rule val activityTestRule: ActivityTestRule<MainActivity> = ActivityTestRule(MainActivity::class.java, false, false) @Before fun setUp() { activityTestRule.launchActivity(Intent()) }a @Test fun counterView_shouldDisplayZeroOnCreate() { onView(withId(R.id.counter_view)).check(matches(withText("0"))) }b @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click())
103. @RunWith(AndroidJUnit4::class) class MainActivityUiTest { @get:Rule val activityTestRule: ActivityTestRule<MainActivity> = ActivityTestRule(MainActivity::class.java, false, false) @Before fun setUp() { activityTestRule.launchActivity(Intent()) }a @Test fun counterView_shouldDisplayZeroOnCreate() { onView(withId(R.id.counter_view)).check(matches(withText("0"))) }b @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click())
104. @RunWith(AndroidJUnit4::class) class MainActivityUiTest { @get:Rule val activityTestRule: ActivityTestRule<MainActivity> = ActivityTestRule(MainActivity::class.java, false, false) @Before fun setUp() { activityTestRule.launchActivity(Intent()) }a @Test fun counterView_shouldDisplayZeroOnCreate() { onView(withId(R.id.counter_view)).check(matches(withText("0"))) }b @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click())
105. @RunWith(AndroidJUnit4::class) class MainActivityUiTest { @get:Rule val activityTestRule: ActivityTestRule<MainActivity> = ActivityTestRule(MainActivity::class.java, false, false) @Before fun setUp() { activityTestRule.launchActivity(Intent()) }a @Test fun counterView_shouldDisplayZeroOnCreate() { onView(withId(R.id.counter_view)).check(matches(withText("0"))) }b @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click())
106. @RunWith(AndroidJUnit4::class) class MainActivityUiTest { @get:Rule val activityTestRule: ActivityTestRule<MainActivity> = ActivityTestRule(MainActivity::class.java, false, false) @Before fun setUp() { activityTestRule.launchActivity(Intent()) }a @Test fun counterView_shouldDisplayZeroOnCreate() { onView(withId(R.id.counter_view)).check(matches(withText("0"))) }b @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click())
107. @RunWith(AndroidJUnit4::class) class MainActivityUiTest { @get:Rule val activityTestRule: ActivityTestRule<MainActivity> = ActivityTestRule(MainActivity::class.java, false, false) @Before fun setUp() { activityTestRule.launchActivity(Intent()) }a @Test fun counterView_shouldDisplayZeroOnCreate() { onView(withId(R.id.counter_view)).check(matches(withText("0"))) }b @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click())
108. @RunWith(AndroidJUnit4::class) class MainActivityUiTest { @get:Rule val activityTestRule: ActivityTestRule<MainActivity> = ActivityTestRule(MainActivity::class.java, false, false) @Before fun setUp() { activityTestRule.launchActivity(Intent()) }a @Test fun counterView_shouldDisplayZeroOnCreate() { onView(withId(R.id.counter_view)).check(matches(withText("0"))) }b @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click())
109. @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("1"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("2"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("3"))) }a @Test fun counterView_shouldDisplayZeroOnResetButtonClick() { onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.reset_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("0"))) }a }
110. @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("1"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("2"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("3"))) }a @Test fun counterView_shouldDisplayZeroOnResetButtonClick() { onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.reset_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("0"))) }a }
111. @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("1"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("2"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("3"))) }a @Test fun counterView_shouldDisplayZeroOnResetButtonClick() { onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.reset_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("0"))) }a }
112. @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click())a onView(withId(R.id.counter_view)).check(matches(withText("1"))) onView(withId(R.id.count_button)).perform(click())b onView(withId(R.id.counter_view)).check(matches(withText("2"))) onView(withId(R.id.count_button)).perform(click())c onView(withId(R.id.counter_view)).check(matches(withText("3"))) }a @Test fun counterView_shouldDisplayZeroOnResetButtonClick() { onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.reset_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("0"))) }a }
113. @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click())a onView(withId(R.id.counter_view)).check(matches(withText("1"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("2"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("3"))) }a @Test fun counterView_shouldDisplayZeroOnResetButtonClick() { onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.reset_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("0"))) }a }
114. @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click())a onView(withId(R.id.counter_view)).check(matches(withText("1"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("2"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("3"))) }a @Test fun counterView_shouldDisplayZeroOnResetButtonClick() { onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.reset_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("0"))) }a }
115. @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click())a onView(withId(R.id.counter_view)).check(matches(withText("1"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("2"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("3"))) }a @Test fun counterView_shouldDisplayZeroOnResetButtonClick() { onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.reset_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("0"))) }a }
116. @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click())a onView(withId(R.id.counter_view)).check(matches(withText("1"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("2"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("3"))) }a @Test fun counterView_shouldDisplayZeroOnResetButtonClick() { onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.reset_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("0"))) }a }
117. @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("1"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("2"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("3"))) }a @Test fun counterView_shouldDisplayZeroOnResetButtonClick() { onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.count_button)).perform(click())+ onView(withId(R.id.reset_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("0"))) }a }
118. @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("1"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("2"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("3"))) }a @Test fun counterView_shouldDisplayZeroOnResetButtonClick() { onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.reset_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("0"))) }a }
119. @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("1"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("2"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("3"))) }a @Test fun counterView_shouldDisplayZeroOnResetButtonClick() { onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.reset_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("0"))) }a }
120. @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("1"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("2"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("3"))) }a @Test fun counterView_shouldDisplayZeroOnResetButtonClick() { onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.reset_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("0"))) }a }
121. @Test fun counterView_shouldDisplayNewCountOnCountButtonClick() { onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("1"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("2"))) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("3"))) }a @Test fun counterView_shouldDisplayZeroOnResetButtonClick() { onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.count_button)).perform(click()) onView(withId(R.id.reset_button)).perform(click()) onView(withId(R.id.counter_view)).check(matches(withText("0"))) }a }p
123. Demo
124. Conclusion Testing is fun!
125. • Why test? • Types of tests • Unit Tests • Integration Tests • UI Tests • Continuous Integration (CI) • Test-Driven Development (TDD) • Tests == Quality Conclusion
126. Tests == Quality
127. Merci Charles “Chuck” Greb @ecgreb DevFest Conakry December 1st, 2018
128. usebutton.com