Lab 22

🖥 Lab 22: Building an Android Test Suite

Let's build a simple test suite for our app

Objectives

1. Write unit tests for MyNotesViewModel

   1. Write tests to verify ViewState expectations
   2. Use @Before annotation method to simplify test setup
   3. Use Mockito to mock NoteDao behavior
   4. Use Turbine library to make assertions about multiple Flow emissions

2. Write instrumentation tests for MainActivity

   1. Write a basic test to verify Android framework api
   2. Write an Espresso test to verify the AppBar title is correct in MainActivity

3. Use Gradle Wrapper to run unit tests from the command line

4. Use Gradle Wrapper to run instrumentation tests from the command line

🖥 Lab 22 Hints: Building an Android Test Suite

💡 Helpful Resources

• Build Effective Android Unit Tests
• Build Local Unit Tests
• Build Instrumentation Tests
• Mock Dependencies with Mockito
• Testing Flows using Turbine

💡 How do I setup a basic instrumentation test?

Create a new test class, and add test methods that are annotated with @Test.

@Test
fun verifySomeBehavior() {
    // test logic
}