Lesson 9: Sharing code between tests with setUp() and tearDown()

[samuelematias]

Description

PR with Lesson 9.

  setUpAll(() => print('Runs BEFORE any test is executed'));

  setUp(() => print('Runs BEFORE EVERY test is executed'));

  tearDown(() => print('Runs AFTER EVERY test is executed'));

  tearDownAll(() => print('Runs AFTER ALL tests have been executed'));

Types of changes

• Fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (non-breaking change which adds Improvements)