Saving Data on Android

com.raywenderlich.sqlitetodo (test)
 and select 
New
 > 
Kotlin File/Class
. Name the 
class 
ToDoDatabaseTest
 and click 
OK
. Open the file and add the code:
@RunWith(RobolectricTestRunner::class)
 
class
 
TestDatabase
 { 
  
// 1
 
  
lateinit
 
var
 dbHelper: ToDoDatabaseHandler 
 
  
// 2
 
  
@Before
 
  
fun
 
setup
()
 { 
    dbHelper = 
ToDoDatabaseHandler(RuntimeEnvironment.application) 
    dbHelper.clearDbAndRecreate() 
  } 
 
 
  
@Test
 
  
@Throws(Exception::class)
 
  
fun
 
testDbInsertion
()
 { 
    
// 3
 
    
// Given
 
    
val
 item1 = ToDo(
0
, 
"Test my Program"
, 
false
) 
    
val
 item2 = ToDo(
0
, 
"Test my Program Again"
, 
false
) 
 
    
// 4
 
    
// When
 
    dbHelper.createToDo(item1) 
    dbHelper.createToDo(item2) 
 
    
// 5
 
    
// Then
 
    
val
 allText = dbHelper.getAllText() 
    
val
 expectedData = 
"
${item1.toDoName}${item2.toDoName}
"
 
    Assert.assertEquals(allText, expectedData) 
  } 
   
  
// 6
Saving Data on Android
Chapter 3: SQLite Database
raywenderlich.com
66

---

  
@After
 
  
fun
 
tearDown
()
 { 
    dbHelper.clearDb() 
  } 
}
With the above, you:
1. First, declare a database helper property, which you will test.
2. Perform setup by initializing the database, then clear and recreate the database 
to start with a fresh copy every time. The function annotated with 
@Setup
 will be 
the first function to run before every test.
3. The test is written in 
cucumber style
 or 
Given/When/Then
. You first create two 
TODO items with two different names. Given those items...
4. ...when they are added to the database...
5. ...then Assert that 
getAllText
 matches the expected value.
6. Clear the database after the test, just to be sure.
To run the test, click the green arrow next to the class declaration and select