ThreadPoolTaskSchedulerBuilderTests Class — spring-boot Architecture

Source Code

core/spring-boot/src/test/java/org/springframework/boot/task/ThreadPoolTaskSchedulerBuilderTests.java lines 39–146

class ThreadPoolTaskSchedulerBuilderTests {

	private final ThreadPoolTaskSchedulerBuilder builder = new ThreadPoolTaskSchedulerBuilder();

	@Test
	void poolSettingsShouldApply() {
		ThreadPoolTaskScheduler scheduler = this.builder.poolSize(4).build();
		assertThat(scheduler.getPoolSize()).isEqualTo(4);
	}

	@Test
	void awaitTerminationShouldApply() {
		ThreadPoolTaskScheduler executor = this.builder.awaitTermination(true).build();
		assertThat(executor).hasFieldOrPropertyWithValue("waitForTasksToCompleteOnShutdown", true);
	}

	@Test
	void awaitTerminationPeriodShouldApply() {
		Duration period = Duration.ofMinutes(1);
		ThreadPoolTaskScheduler executor = this.builder.awaitTerminationPeriod(period).build();
		assertThat(executor).hasFieldOrPropertyWithValue("awaitTerminationMillis", period.toMillis());
	}

	@Test
	void threadNamePrefixShouldApply() {
		ThreadPoolTaskScheduler scheduler = this.builder.threadNamePrefix("test-").build();
		assertThat(scheduler.getThreadNamePrefix()).isEqualTo("test-");
	}

	@Test
	void taskDecoratorShouldApply() {
		TaskDecorator taskDecorator = mock(TaskDecorator.class);
		ThreadPoolTaskScheduler scheduler = this.builder.taskDecorator(taskDecorator).build();
		assertThat(scheduler).extracting("taskDecorator").isSameAs(taskDecorator);
	}

	@Test
	@SuppressWarnings("NullAway") // Test null check
	void customizersWhenCustomizersAreNullShouldThrowException() {
		assertThatIllegalArgumentException()
			.isThrownBy(() -> this.builder.customizers((ThreadPoolTaskSchedulerCustomizer[]) null))
			.withMessageContaining("'customizers' must not be null");
	}

	@Test
	@SuppressWarnings("NullAway") // Test null check
	void customizersCollectionWhenCustomizersAreNullShouldThrowException() {
		assertThatIllegalArgumentException()
			.isThrownBy(() -> this.builder.customizers((Set<ThreadPoolTaskSchedulerCustomizer>) null))
			.withMessageContaining("'customizers' must not be null");
	}

	@Test
	void customizersShouldApply() {
		ThreadPoolTaskSchedulerCustomizer customizer = mock(ThreadPoolTaskSchedulerCustomizer.class);
		ThreadPoolTaskScheduler scheduler = this.builder.customizers(customizer).build();
		then(customizer).should().customize(scheduler);
	}

	@Test
	void customizersShouldBeAppliedLast() {
		ThreadPoolTaskScheduler scheduler = spy(new ThreadPoolTaskScheduler());
		this.builder.poolSize(4).threadNamePrefix("test-").additionalCustomizers((taskScheduler) -> {
			then(taskScheduler).should().setPoolSize(4);
			then(taskScheduler).should().setThreadNamePrefix("test-");
		});
		this.builder.configure(scheduler);
	}

	@Test
	void customizersShouldReplaceExisting() {
		ThreadPoolTaskSchedulerCustomizer customizer1 = mock(ThreadPoolTaskSchedulerCustomizer.class);
		ThreadPoolTaskSchedulerCustomizer customizer2 = mock(ThreadPoolTaskSchedulerCustomizer.class);
		ThreadPoolTaskScheduler scheduler = this.builder.customizers(customizer1)
			.customizers(Collections.singleton(customizer2))
			.build();
		then(customizer1).shouldHaveNoInteractions();
		then(customizer2).should().customize(scheduler);
	}

	@Test
	@SuppressWarnings("NullAway") // Test null check
	void additionalCustomizersWhenCustomizersAreNullShouldThrowException() {
		assertThatIllegalArgumentException()
			.isThrownBy(() -> this.builder.additionalCustomizers((ThreadPoolTaskSchedulerCustomizer[]) null))
			.withMessageContaining("'customizers' must not be null");
	}

	@Test
	@SuppressWarnings("NullAway") // Test null check
	void additionalCustomizersCollectionWhenCustomizersAreNullShouldThrowException() {
		assertThatIllegalArgumentException()
			.isThrownBy(() -> this.builder.additionalCustomizers((Set<ThreadPoolTaskSchedulerCustomizer>) null))
			.withMessageContaining("'customizers' must not be null");
	}

	@Test
	void additionalCustomizersShouldAddToExisting() {
		ThreadPoolTaskSchedulerCustomizer customizer1 = mock(ThreadPoolTaskSchedulerCustomizer.class);
		ThreadPoolTaskSchedulerCustomizer customizer2 = mock(ThreadPoolTaskSchedulerCustomizer.class);
		ThreadPoolTaskScheduler scheduler = this.builder.customizers(customizer1)
			.additionalCustomizers(customizer2)
			.build();
		then(customizer1).should().customize(scheduler);
		then(customizer2).should().customize(scheduler);
	}

}