Use consistent exception messages in Assert calls

Update `Assert` calls to consistently use messages of the form
"'item' must [not] ...".

Closes gh-43780

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/availability/AvailabilityProbesHealthEndpointGroups.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 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.
@@ -48,7 +48,7 @@ class AvailabilityProbesHealthEndpointGroups implements HealthEndpointGroups {
 	private static final String READINESS = "readiness";
 
 	AvailabilityProbesHealthEndpointGroups(HealthEndpointGroups groups, boolean addAdditionalPaths) {
-		Assert.notNull(groups, "Groups must not be null");
+		Assert.notNull(groups, "'groups' must not be null");
 		this.groups = groups;
 		this.probeGroups = createProbeGroups(addAdditionalPaths);
 		Set<String> names = new LinkedHashSet<>(groups.getNames());

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/availability/DelegatingAvailabilityProbesHealthEndpointGroup.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 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.
@@ -37,7 +37,7 @@ class DelegatingAvailabilityProbesHealthEndpointGroup implements HealthEndpointG
 
 	DelegatingAvailabilityProbesHealthEndpointGroup(HealthEndpointGroup delegate,
 			AdditionalHealthEndpointPath additionalPath) {
-		Assert.notNull(delegate, "Delegate must not be null");
+		Assert.notNull(delegate, "'delegate' must not be null");
 		this.delegate = delegate;
 		this.additionalPath = additionalPath;
 	}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/reactive/ReactiveCloudFoundrySecurityService.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.
@@ -56,8 +56,8 @@ class ReactiveCloudFoundrySecurityService {
 
 	ReactiveCloudFoundrySecurityService(WebClient.Builder webClientBuilder, String cloudControllerUrl,
 			boolean skipSslValidation) {
-		Assert.notNull(webClientBuilder, "WebClient must not be null");
-		Assert.notNull(cloudControllerUrl, "CloudControllerUrl must not be null");
+		Assert.notNull(webClientBuilder, "'webClientBuilder' must not be null");
+		Assert.notNull(cloudControllerUrl, "'cloudControllerUrl' must not be null");
 		if (skipSslValidation) {
 			webClientBuilder.clientConnector(buildTrustAllSslConnector());
 		}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/servlet/CloudFoundrySecurityService.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.
@@ -49,8 +49,8 @@ class CloudFoundrySecurityService {
 
 	CloudFoundrySecurityService(RestTemplateBuilder restTemplateBuilder, String cloudControllerUrl,
 			boolean skipSslValidation) {
-		Assert.notNull(restTemplateBuilder, "RestTemplateBuilder must not be null");
-		Assert.notNull(cloudControllerUrl, "CloudControllerUrl must not be null");
+		Assert.notNull(restTemplateBuilder, "'restTemplateBuilder' must not be null");
+		Assert.notNull(cloudControllerUrl, "'cloudControllerUrl' must not be null");
 		if (skipSslValidation) {
 			restTemplateBuilder = restTemplateBuilder.requestFactory(SkipSslVerificationHttpRequestFactory.class);
 		}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/endpoint/expose/IncludeExcludeEndpointFilter.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.
@@ -80,10 +80,10 @@ public IncludeExcludeEndpointFilter(Class<E> endpointType, Collection<String> in
 
 	private IncludeExcludeEndpointFilter(Class<E> endpointType, Environment environment, String prefix,
 			EndpointPatterns defaultIncludes) {
-		Assert.notNull(endpointType, "EndpointType must not be null");
-		Assert.notNull(environment, "Environment must not be null");
-		Assert.hasText(prefix, "Prefix must not be empty");
-		Assert.notNull(defaultIncludes, "DefaultIncludes must not be null");
+		Assert.notNull(endpointType, "'endpointType' must not be null");
+		Assert.notNull(environment, "'environment' must not be null");
+		Assert.hasText(prefix, "'prefix' must not be empty");
+		Assert.notNull(defaultIncludes, "'defaultIncludes' must not be null");
 		Binder binder = Binder.get(environment);
 		this.endpointType = endpointType;
 		this.include = new EndpointPatterns(bind(binder, prefix + ".include"));
@@ -93,8 +93,8 @@ private IncludeExcludeEndpointFilter(Class<E> endpointType, Environment environm
 
 	private IncludeExcludeEndpointFilter(Class<E> endpointType, Collection<String> include, Collection<String> exclude,
 			EndpointPatterns defaultIncludes) {
-		Assert.notNull(endpointType, "EndpointType Type must not be null");
-		Assert.notNull(defaultIncludes, "DefaultIncludes must not be null");
+		Assert.notNull(endpointType, "'endpointType' Type must not be null");
+		Assert.notNull(defaultIncludes, "'defaultIncludes' must not be null");
 		this.endpointType = endpointType;
 		this.include = new EndpointPatterns(include);
 		this.defaultIncludes = defaultIncludes;

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/WebEndpointProperties.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.
@@ -62,7 +62,7 @@ public String getBasePath() {
 	}
 
 	public void setBasePath(String basePath) {
-		Assert.isTrue(basePath.isEmpty() || basePath.startsWith("/"), "Base path must start with '/' or be empty");
+		Assert.isTrue(basePath.isEmpty() || basePath.startsWith("/"), "'basePath' must start with '/' or be empty");
 		this.basePath = cleanBasePath(basePath);
 	}
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/AbstractCompositeHealthContributorConfiguration.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.
@@ -47,7 +47,7 @@ protected AbstractCompositeHealthContributorConfiguration(Function<B, I> indicat
 	}
 
 	protected final C createContributor(Map<String, B> beans) {
-		Assert.notEmpty(beans, "Beans must not be empty");
+		Assert.notEmpty(beans, "'beans' must not be empty");
 		if (beans.size() == 1) {
 			return createIndicator(beans.values().iterator().next());
 		}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/jdbc/DataSourceHealthContributorAutoConfiguration.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.
@@ -97,7 +97,7 @@ public HealthContributor dbHealthContributor(Map<String, DataSource> dataSources
 	}
 
 	private HealthContributor createContributor(Map<String, DataSource> beans) {
-		Assert.notEmpty(beans, "Beans must not be empty");
+		Assert.notEmpty(beans, "'beans' must not be empty");
 		if (beans.size() == 1) {
 			return createContributor(beans.values().iterator().next());
 		}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/OnlyOnceLoggingDenyMeterFilter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 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.
@@ -43,7 +43,7 @@ public final class OnlyOnceLoggingDenyMeterFilter implements MeterFilter {
 	private final Supplier<String> message;
 
 	public OnlyOnceLoggingDenyMeterFilter(Supplier<String> message) {
-		Assert.notNull(message, "Message must not be null");
+		Assert.notNull(message, "'message' must not be null");
 		this.message = message;
 	}
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/PropertiesMeterFilter.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.
@@ -51,7 +51,7 @@ public class PropertiesMeterFilter implements MeterFilter {
 	private final MeterFilter mapFilter;
 
 	public PropertiesMeterFilter(MetricsProperties properties) {
-		Assert.notNull(properties, "Properties must not be null");
+		Assert.notNull(properties, "'properties' must not be null");
 		this.properties = properties;
 		this.mapFilter = createMapFilter(properties.getTags());
 	}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/properties/PropertiesConfigAdapter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 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.
@@ -38,7 +38,7 @@ public class PropertiesConfigAdapter<T> {
 	 * @param properties the source properties
 	 */
 	public PropertiesConfigAdapter(T properties) {
-		Assert.notNull(properties, "Properties must not be null");
+		Assert.notNull(properties, "'properties' must not be null");
 		this.properties = properties;
 	}
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/system/DiskSpaceHealthIndicatorProperties.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 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.
@@ -56,7 +56,7 @@ public DataSize getThreshold() {
 	}
 
 	public void setThreshold(DataSize threshold) {
-		Assert.isTrue(!threshold.isNegative(), "threshold must be greater than or equal to 0");
+		Assert.isTrue(!threshold.isNegative(), "'threshold' must be greater than or equal to 0");
 		this.threshold = threshold;
 	}
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/LocalBaggageFields.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.
@@ -37,7 +37,7 @@ class LocalBaggageFields {
 	private final List<String> fields;
 
 	LocalBaggageFields(List<String> fields) {
-		Assert.notNull(fields, "fields must not be null");
+		Assert.notNull(fields, "'fields' must not be null");
 		this.fields = fields;
 	}
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/SpanExporters.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.
@@ -68,7 +68,7 @@ static SpanExporters of(SpanExporter... spanExporters) {
 	 * @return the constructed {@link SpanExporters} instance
 	 */
 	static SpanExporters of(Collection<? extends SpanExporter> spanExporters) {
-		Assert.notNull(spanExporters, "SpanExporters must not be null");
+		Assert.notNull(spanExporters, "'spanExporters' must not be null");
 		List<SpanExporter> copy = List.copyOf(spanExporters);
 		return () -> copy;
 	}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/SpanProcessors.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.
@@ -68,7 +68,7 @@ static SpanProcessors of(SpanProcessor... spanProcessors) {
 	 * @return the constructed {@link SpanProcessors} instance
 	 */
 	static SpanProcessors of(Collection<? extends SpanProcessor> spanProcessors) {
-		Assert.notNull(spanProcessors, "SpanProcessors must not be null");
+		Assert.notNull(spanProcessors, "'spanProcessors' must not be null");
 		List<SpanProcessor> copy = List.copyOf(spanProcessors);
 		return () -> copy;
 	}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/web/servlet/ManagementErrorEndpoint.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.
@@ -47,8 +47,8 @@ public class ManagementErrorEndpoint {
 	private final ErrorProperties errorProperties;
 
 	public ManagementErrorEndpoint(ErrorAttributes errorAttributes, ErrorProperties errorProperties) {
-		Assert.notNull(errorAttributes, "ErrorAttributes must not be null");
-		Assert.notNull(errorProperties, "ErrorProperties must not be null");
+		Assert.notNull(errorAttributes, "'errorAttributes' must not be null");
+		Assert.notNull(errorProperties, "'errorProperties' must not be null");
 		this.errorAttributes = errorAttributes;
 		this.errorProperties = errorProperties;
 	}

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/availability/AvailabilityProbesHealthEndpointGroupsTests.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.
@@ -52,7 +52,7 @@ void setup() {
 	@Test
 	void createWhenGroupsIsNullThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new AvailabilityProbesHealthEndpointGroups(null, false))
-			.withMessage("Groups must not be null");
+			.withMessage("'groups' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/endpoint/expose/IncludeExcludeEndpointFilterTests.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.
@@ -45,28 +45,28 @@ class IncludeExcludeEndpointFilterTests {
 	void createWhenEndpointTypeIsNullShouldThrowException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new IncludeExcludeEndpointFilter<>(null, new MockEnvironment(), "foo"))
-			.withMessageContaining("EndpointType must not be null");
+			.withMessageContaining("'endpointType' must not be null");
 	}
 
 	@Test
 	void createWhenEnvironmentIsNullShouldThrowException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new IncludeExcludeEndpointFilter<>(ExposableEndpoint.class, null, "foo"))
-			.withMessageContaining("Environment must not be null");
+			.withMessageContaining("'environment' must not be null");
 	}
 
 	@Test
 	void createWhenPrefixIsNullShouldThrowException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new IncludeExcludeEndpointFilter<>(ExposableEndpoint.class, new MockEnvironment(), null))
-			.withMessageContaining("Prefix must not be empty");
+			.withMessageContaining("'prefix' must not be empty");
 	}
 
 	@Test
 	void createWhenPrefixIsEmptyShouldThrowException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new IncludeExcludeEndpointFilter<>(ExposableEndpoint.class, new MockEnvironment(), ""))
-			.withMessageContaining("Prefix must not be empty");
+			.withMessageContaining("'prefix' must not be empty");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/WebEndpointPropertiesTests.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.
@@ -47,7 +47,7 @@ void basePathShouldBeCleaned() {
 	void basePathMustStartWithSlash() {
 		WebEndpointProperties properties = new WebEndpointProperties();
 		assertThatIllegalArgumentException().isThrownBy(() -> properties.setBasePath("admin"))
-			.withMessageContaining("Base path must start with '/' or be empty");
+			.withMessageContaining("'basePath' must start with '/' or be empty");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/health/AbstractCompositeHealthContributorConfigurationTests.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.
@@ -49,7 +49,7 @@ abstract class AbstractCompositeHealthContributorConfigurationTests<C, I extends
 	void createContributorWhenBeansIsEmptyThrowsException() {
 		Map<String, TestBean> beans = Collections.emptyMap();
 		assertThatIllegalArgumentException().isThrownBy(() -> newComposite().createContributor(beans))
-			.withMessage("Beans must not be empty");
+			.withMessage("'beans' must not be empty");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/metrics/PropertiesMeterFilterTests.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.
@@ -48,7 +48,7 @@ class PropertiesMeterFilterTests {
 	@Test
 	void createWhenPropertiesIsNullShouldThrowException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new PropertiesMeterFilter(null))
-			.withMessageContaining("Properties must not be null");
+			.withMessageContaining("'properties' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/system/DiskSpaceHealthContributorAutoConfigurationTests.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.
@@ -49,7 +49,7 @@ void thresholdMustBePositive() {
 			.run((context) -> assertThat(context).hasFailed()
 				.getFailure()
 				.rootCause()
-				.hasMessage("threshold must be greater than or equal to 0"));
+				.hasMessage("'threshold' must be greater than or equal to 0"));
 	}
 
 	@Test