Polish "Use Assert.state() with Supplier where possible"

Closes gh-10658

Author: snicoll

spring-boot-project/spring-boot-cli/src/it/java/org/springframework/boot/cli/infrastructure/CommandLineInvoker.java

@@ -93,8 +93,8 @@ private File findLaunchScript() throws IOException {
 		}
 		File bin = new File(unpacked.listFiles()[0], "bin");
 		File launchScript = new File(bin, isWindows() ? "spring.bat" : "spring");
-		Assert.state(launchScript.exists() && launchScript.isFile(),
-				() -> "Could not find CLI launch script " + launchScript.getAbsolutePath());
+		Assert.state(launchScript.exists() && launchScript.isFile(), () ->
+				"Could not find CLI launch script " + launchScript.getAbsolutePath());
 		return launchScript;
 	}
 

spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/mock/mockito/DefinitionsParser.java

@@ -109,8 +109,8 @@ private void parseSpyBeanAnnotation(SpyBean annotation, AnnotatedElement element
 	private void addDefinition(AnnotatedElement element, Definition definition,
 			String type) {
 		boolean isNewDefinition = this.definitions.add(definition);
-		Assert.state(isNewDefinition,
-				() -> "Duplicate " + type + " definition " + definition);
+		Assert.state(isNewDefinition, () ->
+				"Duplicate " + type + " definition " + definition);
 		if (element instanceof Field) {
 			Field field = (Field) element;
 			this.definitionFields.put(definition, field);

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/ApplicationTemp.java

@@ -91,7 +91,8 @@ private File getTempDirectory() {
 		Assert.state(StringUtils.hasLength(property), "No 'java.io.tmpdir' property set");
 		File file = new File(property);
 		Assert.state(file.exists(), () -> "Temp directory" + file + " does not exist");
-		Assert.state(file.isDirectory(), () -> "Temp location " + file + " is not a directory");
+		Assert.state(file.isDirectory(), () -> "Temp location " + file
+				+ " is not a directory");
 		return file;
 	}
 

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/jetty/JettyWebServer.java

@@ -92,8 +92,8 @@ private void initialize() {
 					@Override
 					protected void doStart() throws Exception {
 						for (Connector connector : JettyWebServer.this.connectors) {
-							Assert.state(connector.isStopped(), () -> "Connector " + connector
-									+ " has been started prematurely");
+							Assert.state(connector.isStopped(), () -> "Connector "
+									+ connector + " has been started prematurely");
 						}
 						JettyWebServer.this.server.setConnectors(null);
 					}