Use HttpStatusCode interface

This commit contains changes made because of the introduction of
HttpStatusCode. In general, methods that used to return a HttpStatus
now return HttpStatusCode instead, and methods that returned raw status
codes are now deprecated.

See gh-28214

spring-web/src/testFixtures/java/org/springframework/web/testfixture/http/client/reactive/MockClientHttpResponse.java

@@ -30,6 +30,7 @@ import org.springframework.core.io.buffer.DataBufferUtils;
 import org.springframework.core.io.buffer.DefaultDataBufferFactory;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
+import org.springframework.http.HttpStatusCode;
 import org.springframework.http.MediaType;
 import org.springframework.http.ResponseCookie;
 import org.springframework.http.client.reactive.ClientHttpResponse;
@@ -46,7 +47,7 @@ import org.springframework.util.MultiValueMap;
  */
 public class MockClientHttpResponse implements ClientHttpResponse {
 
-	private final int status;
+	private final HttpStatusCode statusCode;
 
 	private final HttpHeaders headers = new HttpHeaders();
 
@@ -55,25 +56,25 @@ public class MockClientHttpResponse implements ClientHttpResponse {
 	private Flux<DataBuffer> body = Flux.empty();
 
 
-	public MockClientHttpResponse(HttpStatus status) {
-		Assert.notNull(status, "HttpStatus is required");
-		this.status = status.value();
-	}
-
 	public MockClientHttpResponse(int status) {
-		Assert.isTrue(status > 99 && status < 1000, "Status must be between 100 and 999");
-		this.status = status;
+		this(HttpStatusCode.valueOf(status));
+	}
+
+	public MockClientHttpResponse(HttpStatusCode status) {
+		Assert.notNull(status, "HttpStatusCode is required");
+		this.statusCode = status;
 	}
 
 
 	@Override
-	public HttpStatus getStatusCode() {
-		return HttpStatus.valueOf(this.status);
+	public HttpStatusCode getStatusCode() {
+		return this.statusCode;
 	}
 
 	@Override
+	@Deprecated
 	public int getRawStatusCode() {
-		return this.status;
+		return this.statusCode.value();
 	}
 
 	@Override
@@ -140,7 +141,11 @@ public class MockClientHttpResponse implements ClientHttpResponse {
 
 	@Override
 	public String toString() {
-		HttpStatus code = HttpStatus.resolve(this.status);
-		return (code != null ? code.name() + "(" + this.status + ")" : "Status (" + this.status + ")") + this.headers;
+		if (this.statusCode instanceof HttpStatus status) {
+			return status.name() + "(" + this.statusCode + ")" + this.headers;
+		}
+		else {
+			return "Status (" + this.statusCode + ")" + this.headers;
+		}
 	}
 }