Mocking and Test Fixtures

Use traits and test fixtures to mock behavior for unit testing.

Fixture Example

trait Database {
  def getUser(id: Int): String
}

class MockDatabase extends Database {
  def getUser(id: Int): String = "TestUser"
}

Use the mock in your tests to simulate behavior without real dependencies.

class ServiceTest extends AnyFunSuite {
  val db = new MockDatabase()
  test("getUser returns test user") {
    assert(db.getUser(1) == "TestUser")
  }
}