// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package org.chromium.base;
import static org.hamcrest.core.StringStartsWith.startsWith;
import androidx.test.filters.SmallTest;
import org.junit.Assert;
import org.junit.Assume;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.annotation.Config;
import org.chromium.base.ThreadUtils.ThreadChecker;
import org.chromium.base.task.PostTask;
import org.chromium.base.task.TaskTraits;
import org.chromium.base.test.BaseRobolectricTestRunner;
import org.chromium.build.BuildConfig;
/** Unit tests for ThreadUtils. */
@RunWith(BaseRobolectricTestRunner.class)
@Config(manifest = Config.NONE)
public class ThreadUtilsTest {
@Test
@SmallTest
public void testThreadChecker_uiThread() {
Assume.assumeTrue(BuildConfig.ENABLE_ASSERTS);
ThreadChecker checker = new ThreadChecker();
checker.assertOnValidThread();
RuntimeException e =
Assert.assertThrows(
RuntimeException.class,
() ->
PostTask.runSynchronously(
TaskTraits.USER_BLOCKING, checker::assertOnValidThread));
Assert.assertThat(
e.getCause().getMessage(),
startsWith("UI-only class called from background thread"));
}
@Test
@SmallTest
public void testThreadChecker_backgroundThread() {
Assume.assumeTrue(BuildConfig.ENABLE_ASSERTS);
ThreadChecker[] checkerHolder = new ThreadChecker[1];
PostTask.runSynchronously(
TaskTraits.USER_BLOCKING,
() -> {
checkerHolder[0] = new ThreadChecker();
});
AssertionError e =
Assert.assertThrows(AssertionError.class, checkerHolder[0]::assertOnValidThread);
Assert.assertThat(
e.getMessage(), startsWith("Background-only class called from UI thread"));
}
}