Align with body method changes in RequestBodySpec

Closes gh-17460

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/annotation/AbstractWebEndpointIntegrationTests.java

@@ -163,7 +163,7 @@ public abstract class AbstractWebEndpointIntegrationTests<T extends Configurable
 			Map<String, Object> body = new HashMap<>();
 			body.put("foo", "one");
 			body.put("bar", "two");
-			client.post().uri("/test").syncBody(body).exchange().expectStatus().isNoContent().expectBody().isEmpty();
+			client.post().uri("/test").body(body).exchange().expectStatus().isNoContent().expectBody().isEmpty();
 		});
 	}
 
@@ -194,7 +194,7 @@ public abstract class AbstractWebEndpointIntegrationTests<T extends Configurable
 		load(TestEndpointConfiguration.class, (context, client) -> {
 			Map<String, Object> body = new HashMap<>();
 			body.put("foo", "one");
-			client.post().uri("/test").syncBody(body).exchange().expectStatus().isNoContent().expectBody().isEmpty();
+			client.post().uri("/test").body(body).exchange().expectStatus().isNoContent().expectBody().isEmpty();
 			verify(context.getBean(EndpointDelegate.class)).write("one", null);
 		});
 	}

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/reactive/ControllerEndpointHandlerMappingIntegrationTests.java

@@ -80,7 +80,7 @@ class ControllerEndpointHandlerMappingIntegrationTests {
 	@Test
 	void post() {
 		this.contextRunner.run(withWebTestClient((webTestClient) -> webTestClient.post().uri("/actuator/example/two")
-				.syncBody(Collections.singletonMap("id", "test")).exchange().expectStatus().isCreated().expectHeader()
+				.body(Collections.singletonMap("id", "test")).exchange().expectStatus().isCreated().expectHeader()
 				.valueEquals(HttpHeaders.LOCATION, "/example/test")));
 	}
 

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/servlet/ControllerEndpointHandlerMappingIntegrationTests.java

@@ -79,7 +79,7 @@ class ControllerEndpointHandlerMappingIntegrationTests {
 	@Test
 	void post() {
 		this.contextRunner.run(withWebTestClient((webTestClient) -> webTestClient.post().uri("/actuator/example/two")
-				.syncBody(Collections.singletonMap("id", "test")).exchange().expectStatus().isCreated().expectHeader()
+				.body(Collections.singletonMap("id", "test")).exchange().expectStatus().isCreated().expectHeader()
 				.valueEquals(HttpHeaders.LOCATION, "/example/test")));
 	}
 

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/logging/LoggersEndpointWebIntegrationTests.java

@@ -95,7 +95,7 @@ class LoggersEndpointWebIntegrationTests {
 	@WebEndpointTest
 	void setLoggerUsingApplicationJsonShouldSetLogLevel() {
 		this.client.post().uri("/actuator/loggers/ROOT").contentType(MediaType.APPLICATION_JSON)
-				.syncBody(Collections.singletonMap("configuredLevel", "debug")).exchange().expectStatus().isNoContent();
+				.body(Collections.singletonMap("configuredLevel", "debug")).exchange().expectStatus().isNoContent();
 		verify(this.loggingSystem).setLogLevel("ROOT", LogLevel.DEBUG);
 	}
 
@@ -103,15 +103,14 @@ class LoggersEndpointWebIntegrationTests {
 	void setLoggerUsingActuatorV2JsonShouldSetLogLevel() {
 		this.client.post().uri("/actuator/loggers/ROOT")
 				.contentType(MediaType.parseMediaType(ActuatorMediaType.V2_JSON))
-				.syncBody(Collections.singletonMap("configuredLevel", "debug")).exchange().expectStatus().isNoContent();
+				.body(Collections.singletonMap("configuredLevel", "debug")).exchange().expectStatus().isNoContent();
 		verify(this.loggingSystem).setLogLevel("ROOT", LogLevel.DEBUG);
 	}
 
 	@WebEndpointTest
 	void setLoggerWithWrongLogLevelResultInBadRequestResponse() {
 		this.client.post().uri("/actuator/loggers/ROOT").contentType(MediaType.APPLICATION_JSON)
-				.syncBody(Collections.singletonMap("configuredLevel", "other")).exchange().expectStatus()
-				.isBadRequest();
+				.body(Collections.singletonMap("configuredLevel", "other")).exchange().expectStatus().isBadRequest();
 		verifyZeroInteractions(this.loggingSystem);
 	}
 
@@ -119,14 +118,14 @@ class LoggersEndpointWebIntegrationTests {
 	void setLoggerWithNullLogLevel() {
 		this.client.post().uri("/actuator/loggers/ROOT")
 				.contentType(MediaType.parseMediaType(ActuatorMediaType.V2_JSON))
-				.syncBody(Collections.singletonMap("configuredLevel", null)).exchange().expectStatus().isNoContent();
+				.body(Collections.singletonMap("configuredLevel", null)).exchange().expectStatus().isNoContent();
 		verify(this.loggingSystem).setLogLevel("ROOT", null);
 	}
 
 	@WebEndpointTest
 	void setLoggerWithNoLogLevel() {
 		this.client.post().uri("/actuator/loggers/ROOT")
-				.contentType(MediaType.parseMediaType(ActuatorMediaType.V2_JSON)).syncBody(Collections.emptyMap())
+				.contentType(MediaType.parseMediaType(ActuatorMediaType.V2_JSON)).body(Collections.emptyMap())
 				.exchange().expectStatus().isNoContent();
 		verify(this.loggingSystem).setLogLevel("ROOT", null);
 	}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/reactive/error/AbstractErrorWebExceptionHandler.java

@@ -222,7 +222,7 @@ public abstract class AbstractErrorWebExceptionHandler implements ErrorWebExcept
 			builder.append("<div style='white-space:pre-wrap;'>").append(htmlEscape(trace)).append("</div>");
 		}
 		builder.append("</body></html>");
-		return responseBody.syncBody(builder.toString());
+		return responseBody.body(builder.toString());
 	}
 
 	private String htmlEscape(Object input) {

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/reactive/error/DefaultErrorWebExceptionHandlerIntegrationTests.java

@@ -111,7 +111,7 @@ class DefaultErrorWebExceptionHandlerIntegrationTests {
 	void bindingResultError() {
 		this.contextRunner.run((context) -> {
 			WebTestClient client = getWebClient(context);
-			client.post().uri("/bind").contentType(MediaType.APPLICATION_JSON).syncBody("{}").exchange().expectStatus()
+			client.post().uri("/bind").contentType(MediaType.APPLICATION_JSON).body("{}").exchange().expectStatus()
 					.isBadRequest().expectBody().jsonPath("status").isEqualTo("400").jsonPath("error")
 					.isEqualTo(HttpStatus.BAD_REQUEST.getReasonPhrase()).jsonPath("path").isEqualTo(("/bind"))
 					.jsonPath("exception").doesNotExist().jsonPath("errors").isArray().jsonPath("message").isNotEmpty()