StandardTestDispatcher.kt

// Copyright 2022 Google LLC.	
// SPDX-License-Identifier: Apache-2.0
@Test
fun loadTasks_loading() = runTest {
    // Set Main dispatcher to not run coroutines eagerly, for just this one test
    Dispatchers.setMain(StandardTestDispatcher())

    // Load the task in the viewmodel
    statisticsViewModel.refresh()
    // Then progress indicator is shown
    assertThat(statisticsViewModel.dataLoading.getOrAwaitValue()).isTrue()

    // Execute pending coroutine actions
    advanceUntilIdle()
    // Then progress indicator is hidden
    assertThat(statisticsViewModel.dataLoading.getOrAwaitValue()).isFalse()
}