Minimize test resources and move remainder to appropriate packages

Closes gh-44397

Author: wilkinsona

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/BeanDefinitionLoaderTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,6 +23,7 @@
 
 import org.springframework.boot.sampleconfig.MyComponent;
 import org.springframework.boot.sampleconfig.MyNamedComponent;
+import org.springframework.boot.testsupport.classpath.resources.WithResource;
 import org.springframework.context.support.StaticApplicationContext;
 import org.springframework.core.io.ClassPathResource;
 
@@ -72,26 +73,43 @@ void loadJsr330Class() {
 	}
 
 	@Test
+	@WithSampleBeansXmlResource
 	void loadXmlResource() {
-		ClassPathResource resource = new ClassPathResource("sample-beans.xml", getClass());
+		ClassPathResource resource = new ClassPathResource("org/springframework/boot/sample-beans.xml");
 		BeanDefinitionLoader loader = new BeanDefinitionLoader(this.registry, resource);
 		assertThat(load(loader)).isOne();
 		assertThat(this.registry.containsBean("myXmlComponent")).isTrue();
 
 	}
 
 	@Test
+	@WithResource(name = "org/springframework/boot/sample-beans.groovy", content = """
+			import org.springframework.boot.sampleconfig.MyComponent;
+
+			beans {
+				myGroovyComponent(MyComponent) {}
+			}
+			""")
 	void loadGroovyResource() {
-		ClassPathResource resource = new ClassPathResource("sample-beans.groovy", getClass());
+		ClassPathResource resource = new ClassPathResource("org/springframework/boot/sample-beans.groovy");
 		BeanDefinitionLoader loader = new BeanDefinitionLoader(this.registry, resource);
 		assertThat(load(loader)).isOne();
 		assertThat(this.registry.containsBean("myGroovyComponent")).isTrue();
 
 	}
 
 	@Test
+	@WithResource(name = "org/springframework/boot/sample-namespace.groovy", content = """
+			import org.springframework.boot.sampleconfig.MyComponent;
+
+			beans {
+				xmlns([ctx:'http://www.springframework.org/schema/context'])
+				ctx.'component-scan'('base-package':'nonexistent')
+				myGroovyComponent(MyComponent) {}
+			}
+			""")
 	void loadGroovyResourceWithNamespace() {
-		ClassPathResource resource = new ClassPathResource("sample-namespace.groovy", getClass());
+		ClassPathResource resource = new ClassPathResource("org/springframework/boot/sample-namespace.groovy");
 		BeanDefinitionLoader loader = new BeanDefinitionLoader(this.registry, resource);
 		assertThat(load(loader)).isOne();
 		assertThat(this.registry.containsBean("myGroovyComponent")).isTrue();
@@ -114,14 +132,22 @@ void loadClassName() {
 	}
 
 	@Test
-	void loadResourceName() {
+	@WithSampleBeansXmlResource
+	void loadXmlName() {
 		BeanDefinitionLoader loader = new BeanDefinitionLoader(this.registry,
 				"classpath:org/springframework/boot/sample-beans.xml");
 		assertThat(load(loader)).isOne();
 		assertThat(this.registry.containsBean("myXmlComponent")).isTrue();
 	}
 
 	@Test
+	@WithResource(name = "org/springframework/boot/sample-beans.groovy", content = """
+			import org.springframework.boot.sampleconfig.MyComponent;
+
+			beans {
+				myGroovyComponent(MyComponent) {}
+			}
+			""")
 	void loadGroovyName() {
 		BeanDefinitionLoader loader = new BeanDefinitionLoader(this.registry,
 				"classpath:org/springframework/boot/sample-beans.groovy");

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/SimpleMainTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -61,12 +61,14 @@ void configClassContext(CapturedOutput output) throws Exception {
 	}
 
 	@Test
+	@WithSampleBeansXmlResource
 	void xmlContext(CapturedOutput output) throws Exception {
 		SpringApplication.main(getArgs("org/springframework/boot/sample-beans.xml"));
 		assertThat(output).contains(SPRING_STARTUP);
 	}
 
 	@Test
+	@WithSampleBeansXmlResource
 	void mixedContext(CapturedOutput output) throws Exception {
 		SpringApplication.main(getArgs(getClass().getName(), "org/springframework/boot/sample-beans.xml"));
 		assertThat(output).contains(SPRING_STARTUP);

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/SpringApplicationBannerPrinterTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,6 +22,7 @@
 
 import org.springframework.aot.hint.RuntimeHints;
 import org.springframework.aot.hint.predicate.RuntimeHintsPredicates;
+import org.springframework.boot.testsupport.classpath.resources.WithResource;
 import org.springframework.context.support.GenericApplicationContext;
 import org.springframework.core.io.Resource;
 import org.springframework.core.io.ResourceLoader;
@@ -47,9 +48,10 @@ void shouldRegisterRuntimeHints() {
 	}
 
 	@Test
+	@WithResource(name = "banner.txt", content = "\uD83D\uDE0D Spring Boot! \uD83D\uDE0D")
 	void shouldUseUtf8() {
 		ResourceLoader resourceLoader = new GenericApplicationContext();
-		Resource resource = resourceLoader.getResource("classpath:/banner-utf8.txt");
+		Resource resource = resourceLoader.getResource("classpath:banner.txt");
 		SpringApplicationBannerPrinter printer = new SpringApplicationBannerPrinter(resourceLoader,
 				new ResourceBanner(resource));
 		Log log = mock(Log.class);

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/SpringApplicationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -74,6 +74,7 @@
 import org.springframework.boot.context.event.SpringApplicationEvent;
 import org.springframework.boot.convert.ApplicationConversionService;
 import org.springframework.boot.testsupport.classpath.ForkedClassPath;
+import org.springframework.boot.testsupport.classpath.resources.WithResource;
 import org.springframework.boot.testsupport.system.CapturedOutput;
 import org.springframework.boot.testsupport.system.OutputCaptureExtension;
 import org.springframework.boot.web.embedded.netty.NettyReactiveWebServerFactory;
@@ -226,19 +227,24 @@ void sourcesMustBeAccessible() {
 	}
 
 	@Test
+	@WithResource(name = "banner.txt", content = "Running a Test!")
 	void customBanner(CapturedOutput output) {
 		SpringApplication application = spy(new SpringApplication(ExampleConfig.class));
 		application.setWebApplicationType(WebApplicationType.NONE);
-		this.context = application.run("--spring.banner.location=classpath:test-banner.txt");
+		this.context = application.run();
 		assertThat(output).startsWith("Running a Test!");
+
 	}
 
 	@Test
+	@WithResource(name = "banner.txt", content = """
+			Running a Test!
+
+			${test.property}""")
 	void customBannerWithProperties(CapturedOutput output) {
 		SpringApplication application = spy(new SpringApplication(ExampleConfig.class));
 		application.setWebApplicationType(WebApplicationType.NONE);
-		this.context = application.run("--spring.banner.location=classpath:test-banner-with-placeholder.txt",
-				"--test.property=123456");
+		this.context = application.run("--test.property=123456");
 		assertThat(output).containsPattern("Running a Test!\\s+123456");
 	}
 
@@ -289,6 +295,7 @@ void enableBannerInLogViaProperty(CapturedOutput output) {
 	}
 
 	@Test
+	@WithResource(name = "bindtoapplication.properties", content = "spring.main.banner-mode=off")
 	void triggersConfigFileApplicationListenerBeforeBinding() {
 		SpringApplication application = new SpringApplication(ExampleConfig.class);
 		application.setWebApplicationType(WebApplicationType.NONE);
@@ -540,6 +547,7 @@ void commandLinePropertySourceEnhancesEnvironment() {
 	}
 
 	@Test
+	@WithResource(name = "application.properties", content = "foo=bucket")
 	void propertiesFileEnhancesEnvironment() {
 		SpringApplication application = new SpringApplication(ExampleConfig.class);
 		application.setWebApplicationType(WebApplicationType.NONE);
@@ -572,6 +580,8 @@ void additionalProfilesOrderedBeforeActiveProfiles() {
 	}
 
 	@Test
+	@WithResource(name = "application.properties", content = "my.property=fromapplicationproperties")
+	@WithResource(name = "application-other.properties", content = "my.property=fromotherpropertiesfile")
 	void addProfilesOrderWithProperties() {
 		SpringApplication application = new SpringApplication(ExampleConfig.class);
 		application.setWebApplicationType(WebApplicationType.NONE);
@@ -584,6 +594,7 @@ void addProfilesOrderWithProperties() {
 	}
 
 	@Test
+	@WithResource(name = "application.properties", content = "foo=bucket")
 	void emptyCommandLinePropertySourceNotAdded() {
 		SpringApplication application = new SpringApplication(ExampleConfig.class);
 		application.setWebApplicationType(WebApplicationType.NONE);
@@ -814,11 +825,13 @@ void loadSources() {
 	}
 
 	@Test
+	@WithSampleBeansXmlResource
+	@WithResource(name = "application.properties", content = "sample.app.test.prop=*")
 	void wildcardSources() {
 		TestSpringApplication application = new TestSpringApplication();
 		application.getSources().add("classpath*:org/springframework/boot/sample-${sample.app.test.prop}.xml");
 		application.setWebApplicationType(WebApplicationType.NONE);
-		this.context = application.run();
+		this.context = application.run("--spring.config.location=classpath:/");
 	}
 
 	@Test
@@ -1139,6 +1152,8 @@ void reactiveApplicationConfiguredViaAPropertyHasTheCorrectTypeOfContextAndEnvir
 	}
 
 	@Test
+	@WithResource(name = "application-withwebapplicationtype.yml",
+			content = "spring.main.web-application-type: reactive")
 	void environmentIsConvertedIfTypeDoesNotMatch() {
 		ConfigurableApplicationContext context = new SpringApplication(ExampleReactiveWebConfig.class)
 			.run("--spring.profiles.active=withwebapplicationtype");
@@ -1195,6 +1210,7 @@ void circularReferencesCanBeEnabled() {
 	}
 
 	@Test
+	@WithResource(name = "custom-config/application.yml", content = "hello: world")
 	void relaxedBindingShouldWorkBeforeEnvironmentIsPrepared() {
 		SpringApplication application = new SpringApplication(ExampleConfig.class);
 		application.setWebApplicationType(WebApplicationType.NONE);
@@ -1329,6 +1345,8 @@ void bindsEnvironmentPrefixToSpringApplication() {
 	}
 
 	@Test
+	@WithResource(name = "spring-application-config-property-source.properties",
+			content = "test.name=spring-application-config-property-source")
 	void movesConfigClassPropertySourcesToEnd() {
 		SpringApplication application = new SpringApplication(PropertySourceConfig.class);
 		application.setWebApplicationType(WebApplicationType.NONE);

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/WithSampleBeansXmlResource.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2012-2025 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import org.springframework.boot.testsupport.classpath.resources.WithResource;
+
+/**
+ * Makes an {@code org/springframework/boot/sample-beans.xml} resource available from the
+ * thread context classloader.
+ *
+ * @author Andy Wilkinson
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+@WithResource(name = "org/springframework/boot/sample-beans.xml",
+		content = """
+				<?xml version="1.0" encoding="UTF-8"?>
+				<beans xmlns="http://www.springframework.org/schema/beans"
+					xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+					xmlns:context="http://www.springframework.org/schema/context"
+					xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
+								http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
+					<bean id="myXmlComponent" class="org.springframework.boot.sampleconfig.MyComponent"/>
+				</beans>
+				""")
+@interface WithSampleBeansXmlResource {
+
+}

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/builder/SpringApplicationBuilderTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -29,6 +29,7 @@
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.SpringApplicationShutdownHookInstance;
 import org.springframework.boot.WebApplicationType;
+import org.springframework.boot.testsupport.classpath.resources.WithResource;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
@@ -72,14 +73,21 @@ private void close(ApplicationContext context) {
 	}
 
 	@Test
+	@WithResource(name = "application.properties", content = """
+			b=file
+			c=file
+			""")
+	@WithResource(name = "application-foo.properties", content = "b=profile-specific-file")
 	void profileAndProperties() {
 		SpringApplicationBuilder application = new SpringApplicationBuilder().sources(ExampleConfig.class)
 			.contextFactory(ApplicationContextFactory.ofContextClass(StaticApplicationContext.class))
 			.profiles("foo")
-			.properties("foo=bar");
+			.properties("a=default");
 		this.context = application.run();
 		assertThat(this.context).isInstanceOf(StaticApplicationContext.class);
-		assertThat(this.context.getEnvironment().getProperty("foo")).isEqualTo("bucket");
+		assertThat(this.context.getEnvironment().getProperty("a")).isEqualTo("default");
+		assertThat(this.context.getEnvironment().getProperty("b")).isEqualTo("profile-specific-file");
+		assertThat(this.context.getEnvironment().getProperty("c")).isEqualTo("file");
 		assertThat(this.context.getEnvironment().acceptsProfiles(Profiles.of("foo"))).isTrue();
 	}
 
@@ -194,6 +202,7 @@ void parentFirstCreation() {
 	}
 
 	@Test
+	@WithResource(name = "application-node.properties", content = "bar=spam")
 	void parentFirstCreationWithProfileAndDefaultArgs() {
 		SpringApplicationBuilder application = new SpringApplicationBuilder(ExampleConfig.class).profiles("node")
 			.properties("transport=redis")

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/annotation/ImportCandidatesTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,6 +23,8 @@
 
 import org.junit.jupiter.api.Test;
 
+import org.springframework.boot.testsupport.classpath.resources.WithResource;
+
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**
@@ -32,7 +34,18 @@
  */
 class ImportCandidatesTests {
 
+	private static final String IMPORTS_FILE = "META-INF/spring/org.springframework.boot.context.annotation.ImportCandidatesTests$TestAnnotation.imports";
+
 	@Test
+	@WithResource(name = IMPORTS_FILE, content = """
+			# A comment spanning a complete line
+			class1
+
+			class2 # with comment at the end
+			   # Comment with some whitespace in front
+			class3
+
+			""")
 	void loadReadsFromClasspathFile() {
 		ImportCandidates candidates = ImportCandidates.load(TestAnnotation.class, null);
 		assertThat(candidates).containsExactly("class1", "class2", "class3");