ConfigurationPropertySourcesPropertyResolverTests Class — spring-boot Architecture

Source Code

core/spring-boot/src/test/java/org/springframework/boot/context/properties/source/ConfigurationPropertySourcesPropertyResolverTests.java lines 41–191

class ConfigurationPropertySourcesPropertyResolverTests {

	@Test
	void standardPropertyResolverResolvesMultipleTimes() {
		StandardEnvironment environment = new StandardEnvironment();
		CountingMockPropertySource propertySource = createMockPropertySource(environment, true);
		environment.getProperty("missing");
		assertThat(propertySource.getCount("missing")).isEqualTo(2);
	}

	@Test
	void configurationPropertySourcesPropertyResolverResolvesSingleTime() {
		ResolverEnvironment environment = new ResolverEnvironment();
		CountingMockPropertySource propertySource = createMockPropertySource(environment, true);
		environment.getProperty("missing");
		assertThat(propertySource.getCount("missing")).isOne();
	}

	@Test
	void containsPropertyWhenValidConfigurationPropertyName() {
		ResolverEnvironment environment = new ResolverEnvironment();
		CountingMockPropertySource propertySource = createMockPropertySource(environment, true);
		assertThat(environment.containsProperty("spring")).isTrue();
		assertThat(environment.containsProperty("sprong")).isFalse();
		assertThat(propertySource.getCount("spring")).isOne();
		assertThat(propertySource.getCount("sprong")).isOne();
	}

	@Test
	void containsPropertyWhenNotValidConfigurationPropertyName() {
		ResolverEnvironment environment = new ResolverEnvironment();
		CountingMockPropertySource propertySource = createMockPropertySource(environment, true);
		assertThat(environment.containsProperty("spr!ng")).isTrue();
		assertThat(environment.containsProperty("spr*ng")).isFalse();
		assertThat(propertySource.getCount("spr!ng")).isOne();
		assertThat(propertySource.getCount("spr*ng")).isOne();
	}

	@Test
	void getPropertyWhenValidConfigurationPropertyName() {
		ResolverEnvironment environment = new ResolverEnvironment();
		CountingMockPropertySource propertySource = createMockPropertySource(environment, true);
		assertThat(environment.getProperty("spring")).isEqualTo("boot");
		assertThat(environment.getProperty("sprong")).isNull();
		assertThat(propertySource.getCount("spring")).isOne();
		assertThat(propertySource.getCount("sprong")).isOne();
	}

	@Test
	void getPropertyWhenNotValidConfigurationPropertyName() {
		ResolverEnvironment environment = new ResolverEnvironment();
		CountingMockPropertySource propertySource = createMockPropertySource(environment, true);
		assertThat(environment.getProperty("spr!ng")).isEqualTo("boot");
		assertThat(environment.getProperty("spr*ng")).isNull();
		assertThat(propertySource.getCount("spr!ng")).isOne();
		assertThat(propertySource.getCount("spr*ng")).isOne();
	}

	@Test
	void getPropertyWhenNotAttached() {
		ResolverEnvironment environment = new ResolverEnvironment();
		CountingMockPropertySource propertySource = createMockPropertySource(environment, false);
		assertThat(environment.getProperty("spring")).isEqualTo("boot");
		assertThat(environment.getProperty("sprong")).isNull();
		assertThat(propertySource.getCount("spring")).isOne();
		assertThat(propertySource.getCount("sprong")).isOne();
	}

	@Test // gh-26732
	void getPropertyAsTypeWhenHasPlaceholder() {
		ResolverEnvironment environment = new ResolverEnvironment();
		MockPropertySource propertySource = new MockPropertySource();
		propertySource.withProperty("v1", "1");
		propertySource.withProperty("v2", "${v1}");
		environment.getPropertySources().addFirst(propertySource);
		assertThat(environment.getProperty("v2")).isEqualTo("1");
		assertThat(environment.getProperty("v2", Integer.class)).isOne();
	}

	@Test
	void throwsInvalidConfigurationPropertyValueExceptionWhenGetPropertyAsTypeFailsToConvert() {
		ResolverEnvironment environment = new ResolverEnvironment();
		MockPropertySource propertySource = new MockPropertySource();
		propertySource.withProperty("v1", "one");
		propertySource.withProperty("v2", "${v1}");
		environment.getPropertySources().addFirst(propertySource);
		assertThat(environment.getProperty("v2")).isEqualTo("one");
		assertThatExceptionOfType(ConversionFailedException.class)
			.isThrownBy(() -> environment.getProperty("v2", Integer.class))
			.satisfies((ex) -> {
				assertThat(ex.getValue()).isEqualTo("one");
				assertThat(ex.getSourceType()).isEqualTo(TypeDescriptor.valueOf(String.class));
				assertThat(ex.getTargetType()).isEqualTo(TypeDescriptor.valueOf(Integer.class));
			})
			.havingCause()
			.satisfies((ex) -> {
				InvalidConfigurationPropertyValueException invalidValueEx = (InvalidConfigurationPropertyValueException) ex;
				assertThat(invalidValueEx.getName()).isEqualTo("v2");
				assertThat(invalidValueEx.getValue()).isEqualTo("one");
				assertThat(ex).cause().isInstanceOf(NumberFormatException.class);
			});
	}

	private CountingMockPropertySource createMockPropertySource(StandardEnvironment environment, boolean attach) {
		CountingMockPropertySource propertySource = new CountingMockPropertySource();
		propertySource.withProperty("spring", "boot");
		propertySource.withProperty("spr!ng", "boot");
		environment.getPropertySources().addFirst(propertySource);
		if (attach) {
			ConfigurationPropertySources.attach(environment);
		}
		return propertySource;
	}

	static class ResolverEnvironment extends StandardEnvironment {

		@Override
		protected ConfigurablePropertyResolver createPropertyResolver(MutablePropertySources propertySources) {
			return new ConfigurationPropertySourcesPropertyResolver(propertySources);
		}

	}

	static class CountingMockPropertySource extends MockPropertySource {

		private final Map<String, AtomicInteger> counts = new HashMap<>();

		@Override
		public @Nullable Object getProperty(String name) {
			incrementCount(name);
			return super.getProperty(name);
		}

		@Override
		public boolean containsProperty(String name) {
			incrementCount(name);
			return super.containsProperty(name);
		}

		private void incrementCount(String name) {
			this.counts.computeIfAbsent(name, (k) -> new AtomicInteger()).incrementAndGet();
		}

		int getCount(String name) {
			AtomicInteger count = this.counts.get(name);
			return (count != null) ? count.get() : 0;
		}

	}

}