Test that background tasks work as expected. Args: background_task: harness for BackgroundTask app. driver: WebDriver instance. token: The token for the connected client.
(
background_task: AppHarness,
driver: WebDriver,
token: str,
)
| 281 | |
| 282 | |
| 283 | def test_background_task( |
| 284 | background_task: AppHarness, |
| 285 | driver: WebDriver, |
| 286 | token: str, |
| 287 | ): |
| 288 | """Test that background tasks work as expected. |
| 289 | |
| 290 | Args: |
| 291 | background_task: harness for BackgroundTask app. |
| 292 | driver: WebDriver instance. |
| 293 | token: The token for the connected client. |
| 294 | """ |
| 295 | assert background_task.app_instance is not None |
| 296 | |
| 297 | # get a reference to all buttons |
| 298 | delayed_increment_button = driver.find_element(By.ID, "delayed-increment") |
| 299 | yield_increment_button = driver.find_element(By.ID, "yield-increment") |
| 300 | increment_button = driver.find_element(By.ID, "increment") |
| 301 | blocking_pause_button = driver.find_element(By.ID, "blocking-pause") |
| 302 | non_blocking_pause_button = driver.find_element(By.ID, "non-blocking-pause") |
| 303 | racy_increment_button = driver.find_element(By.ID, "racy-increment") |
| 304 | driver.find_element(By.ID, "reset") |
| 305 | |
| 306 | # get a reference to the counter |
| 307 | counter = driver.find_element(By.ID, "counter") |
| 308 | counter_async_cv = driver.find_element(By.ID, "counter-async-cv") |
| 309 | |
| 310 | # get a reference to the iterations input |
| 311 | iterations_input = driver.find_element(By.ID, "iterations") |
| 312 | |
| 313 | # kick off background tasks |
| 314 | iterations_input.clear() |
| 315 | iterations_input.send_keys("50") |
| 316 | delayed_increment_button.click() |
| 317 | blocking_pause_button.click() |
| 318 | delayed_increment_button.click() |
| 319 | for _ in range(10): |
| 320 | increment_button.click() |
| 321 | blocking_pause_button.click() |
| 322 | delayed_increment_button.click() |
| 323 | delayed_increment_button.click() |
| 324 | yield_increment_button.click() |
| 325 | racy_increment_button.click() |
| 326 | non_blocking_pause_button.click() |
| 327 | yield_increment_button.click() |
| 328 | blocking_pause_button.click() |
| 329 | yield_increment_button.click() |
| 330 | for _ in range(10): |
| 331 | increment_button.click() |
| 332 | yield_increment_button.click() |
| 333 | blocking_pause_button.click() |
| 334 | AppHarness.expect(lambda: counter.text == "620", timeout=40) |
| 335 | AppHarness.expect(lambda: counter_async_cv.text == "620", timeout=40) |
| 336 | # all tasks should have exited and cleaned up |
| 337 | AppHarness.expect( |
| 338 | lambda: not background_task.app_instance.event_processor._tasks # pyright: ignore [reportOptionalMemberAccess] |
| 339 | ) |
| 340 |