$ mvn test -Dtest=TestRestTemplateMigrationTest
# captured with spring-boot-starter-restclient removed from pom.xml: @AutoConfigureTestRestTemplate
# is present, but TestRestTemplateTestAutoConfiguration itself cannot even be inspected, because
# TestRestTemplateBuilder's bean method signature needs org.springframework.boot.restclient.RestTemplateBuilder
# on the classpath, and nothing else in this module pulls that class in.

[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.401 s <<< FAILURE! -- in com.ankurm.resttestclient.TestRestTemplateMigrationTest
[ERROR] com.ankurm.resttestclient.TestRestTemplateMigrationTest.theOldApiStillWorksWithOneAnnotationAdded -- Time elapsed: 0.008 s <<< ERROR!
java.lang.IllegalStateException: Failed to load ApplicationContext for [WebMergedContextConfiguration@4b2acb12 testClass = com.ankurm.resttestclient.TestRestTemplateMigrationTest, ...]
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.lambda$loadContext$0(DefaultCacheAwareContextLoaderDelegate.java:195)
	at org.springframework.test.context.cache.DefaultContextCache.put(DefaultContextCache.java:214)
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:160)
	at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:128)
	at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:156)
	at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:111)
	at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:260)
	at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance(SpringExtension.java:242)
Caused by: java.lang.IllegalStateException: Error processing condition on org.springframework.boot.resttestclient.autoconfigure.TestRestTemplateTestAutoConfiguration.testRestTemplate
	at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:60)
	at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:100)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForBeanMethod(ConfigurationClassBeanDefinitionReader.java:196)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:148)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:464)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:316)
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:349)
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:795)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:603)
	at org.springframework.boot.web.server.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:756)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:445)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:321)
Caused by: java.lang.IllegalStateException: @ConditionalOnMissingBean did not specify a bean using type, name or annotation and the attempt to deduce the bean's type failed
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.validate(OnBeanCondition.java:657)
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.<init>(OnBeanCondition.java:603)
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchOutcome(OnBeanCondition.java:147)
	at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:47)
Caused by: org.springframework.boot.autoconfigure.condition.OnBeanCondition$BeanTypeDeductionException: Failed to deduce bean type for org.springframework.boot.resttestclient.autoconfigure.TestRestTemplateTestAutoConfiguration.testRestTemplate
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.deducedBeanTypeForBeanMethod(OnBeanCondition.java:686)
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.deducedBeanType(OnBeanCondition.java:676)
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.<init>(OnBeanCondition.java:596)
Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.boot.resttestclient.autoconfigure.TestRestTemplateTestAutoConfiguration] from ClassLoader [jdk.internal.loader.ClassLoaders$AppClassLoader@c387f44]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:483)
	at org.springframework.util.ReflectionUtils.findMethod(ReflectionUtils.java:240)
	at org.springframework.util.ReflectionUtils.findMethod(ReflectionUtils.java:221)
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.findBeanMethod(OnBeanCondition.java:715)
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.getMethodReturnType(OnBeanCondition.java:710)
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.getReturnType(OnBeanCondition.java:694)
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.deducedBeanTypeForBeanMethod(OnBeanCondition.java:683)
Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/restclient/RestTemplateBuilder
	at java.base/java.lang.Class.getDeclaredMethods0(Native Method)
	at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3010)
	at java.base/java.lang.Class.getDeclaredMethods(Class.java:2329)
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:465)
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.restclient.RestTemplateBuilder
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:580)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:490)