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-docker-compose/src/test/java/org/springframework/boot/docker/compose/core/DockerComposeFileTests.java

@@ -129,20 +129,20 @@ class DockerComposeFileTests {
 	@Test
 	void ofWhenFileIsNullThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> DockerComposeFile.of((File) null))
-			.withMessage("File must not be null");
+			.withMessage("'file' must not be null");
 	}
 
 	@Test
 	void ofWhenFileDoesNotExistThrowsException() {
 		File file = new File(this.temp, "missing");
 		assertThatIllegalArgumentException().isThrownBy(() -> DockerComposeFile.of(file))
-			.withMessageEndingWith("does not exist");
+			.withMessageEndingWith("must exist");
 	}
 
 	@Test
 	void ofWhenFileIsNotFileThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> DockerComposeFile.of(this.temp))
-			.withMessageEndingWith("is not a file");
+			.withMessageEndingWith("must be a normal file");
 	}
 
 	private DockerComposeFile createComposeFile(String name) throws IOException {

spring-boot-project/spring-boot-docker-compose/src/test/java/org/springframework/boot/docker/compose/core/ImageNameTests.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.
@@ -118,25 +118,26 @@ class ImageNameTests {
 	@Test
 	void ofWhenNameIsNullThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> ImageName.of(null))
-			.withMessage("Value must not be empty");
+			.withMessage("'value' must not be empty");
 	}
 
 	@Test
 	void ofWhenNameIsEmptyThrowsException() {
-		assertThatIllegalArgumentException().isThrownBy(() -> ImageName.of("")).withMessage("Value must not be empty");
+		assertThatIllegalArgumentException().isThrownBy(() -> ImageName.of(""))
+			.withMessage("'value' must not be empty");
 	}
 
 	@Test
 	void ofWhenContainsUppercaseThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> ImageName.of("Test"))
-			.withMessageContaining("Unable to parse name")
+			.withMessageContaining("must contain an image reference")
 			.withMessageContaining("Test");
 	}
 
 	@Test
 	void ofWhenNameIncludesTagThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> ImageName.of("ubuntu:latest"))
-			.withMessageContaining("Unable to parse name")
+			.withMessageContaining("must contain an image reference")
 			.withMessageContaining(":latest");
 	}
 
@@ -144,7 +145,7 @@ class ImageNameTests {
 	void ofWhenNameIncludeDigestThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(
 				() -> ImageName.of("ubuntu@sha256:47bfdb88c3ae13e488167607973b7688f69d9e8c142c2045af343ec199649c09"))
-			.withMessageContaining("Unable to parse name")
+			.withMessageContaining("must contain an image reference")
 			.withMessageContaining("@sha256:47b");
 	}
 

spring-boot-project/spring-boot-docker-compose/src/test/java/org/springframework/boot/docker/compose/core/ImageReferenceTests.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.
@@ -165,7 +165,7 @@ class ImageReferenceTests {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> ImageReference
 				.of("registry.example.com/example/example-app:1.6.0-dev.2.uncommitted+wip.foo.c75795d"))
-			.withMessageContaining("Unable to parse image reference");
+			.withMessageContaining("must contain an image reference");
 	}
 
 	@Test
@@ -173,7 +173,7 @@ class ImageReferenceTests {
 	void ofWhenImageNameIsVeryLongAndHasIllegalCharacterThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> ImageReference
 			.of("docker.io/library/this-image-has-a-long-name-with-an-invalid-tag-which-is-at-danger-of-catastrophic-backtracking:1.0.0+1234"))
-			.withMessageContaining("Unable to parse image reference");
+			.withMessageContaining("must contain an image reference");
 	}
 
 	@Test

spring-boot-project/spring-boot-docker-compose/src/test/java/org/springframework/boot/docker/compose/service/connection/jdbc/JdbcUrlBuilderTests.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.
@@ -43,7 +43,7 @@ class JdbcUrlBuilderTests {
 	@Test
 	void createWhenDriverProtocolIsNullThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new JdbcUrlBuilder(null, 123))
-			.withMessage("DriverProtocol must not be null");
+			.withMessage("'driverProtocol' must not be null");
 	}
 
 	@Test
@@ -84,7 +84,7 @@ class JdbcUrlBuilderTests {
 	@Test
 	void buildWhenServiceIsNullThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> this.builder.build(null, "mydb"))
-			.withMessage("Service must not be null");
+			.withMessage("'service' must not be null");
 	}
 
 	private RunningService mockService(int mappedPort) {

spring-boot-project/spring-boot-docker-compose/src/test/java/org/springframework/boot/docker/compose/service/connection/r2dbc/ConnectionFactoryOptionsBuilderTests.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.
@@ -46,7 +46,7 @@ class ConnectionFactoryOptionsBuilderTests {
 	@Test
 	void createWhenDriverProtocolIsNullThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new JdbcUrlBuilder(null, 123))
-			.withMessage("DriverProtocol must not be null");
+			.withMessage("'driverProtocol' must not be null");
 	}
 
 	@Test
@@ -81,14 +81,14 @@ class ConnectionFactoryOptionsBuilderTests {
 	@Test
 	void buildWhenServiceIsNullThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> this.builder.build(null, "mydb", "user", "pass"))
-			.withMessage("Service must not be null");
+			.withMessage("'service' must not be null");
 	}
 
 	@Test
 	void buildWhenDatabaseIsNullThrowsException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> this.builder.build(mockService(456), null, "user", "pass"))
-			.withMessage("Database must not be null");
+			.withMessage("'database' must not be null");
 	}
 
 	private RunningService mockService(int mappedPort) {