DelegatingLoggingSystemFactoryTests Class — spring-boot Architecture

Source Code

core/spring-boot/src/test/java/org/springframework/boot/logging/DelegatingLoggingSystemFactoryTests.java lines 34–65

class DelegatingLoggingSystemFactoryTests {

	private final ClassLoader classLoader = getClass().getClassLoader();

	@Test
	void getLoggingSystemWhenDelegatesFunctionIsNullReturnsNull() {
		DelegatingLoggingSystemFactory factory = new DelegatingLoggingSystemFactory(null);
		assertThat(factory.getLoggingSystem(this.classLoader)).isNull();
	}

	@Test
	void getLoggingSystemWhenDelegatesFunctionReturnsNullReturnsNull() {
		DelegatingLoggingSystemFactory factory = new DelegatingLoggingSystemFactory((cl) -> null);
		assertThat(factory.getLoggingSystem(this.classLoader)).isNull();
	}

	@Test
	void getLoggingSystemReturnsFirstNonNullLoggingSystem() {
		List<LoggingSystemFactory> delegates = new ArrayList<>();
		delegates.add(mock(LoggingSystemFactory.class));
		delegates.add(mock(LoggingSystemFactory.class));
		delegates.add(mock(LoggingSystemFactory.class));
		LoggingSystem result = mock(LoggingSystem.class);
		given(delegates.get(1).getLoggingSystem(this.classLoader)).willReturn(result);
		DelegatingLoggingSystemFactory factory = new DelegatingLoggingSystemFactory((cl) -> delegates);
		assertThat(factory.getLoggingSystem(this.classLoader)).isSameAs(result);
		then(delegates.get(0)).should().getLoggingSystem(this.classLoader);
		then(delegates.get(1)).should().getLoggingSystem(this.classLoader);
		then(delegates.get(2)).shouldHaveNoInteractions();
	}

}