Moved fromServerRequest to ServerRequest itself

This commit moves WebFluxUriComponentsBuilder.fromServerRequest to the
ServerRequest interface itself.

Consequently, the WebFluxUriComponentsBuilder is removes itself, as it
contained no other methods.

Issue: SPR-15953

spring-webflux/src/test/java/org/springframework/web/reactive/function/server/DefaultServerRequestTests.java

@@ -87,6 +87,21 @@ public class DefaultServerRequestTests {
 		assertEquals(uri, request.uri());
 	}
 
+	@Test
+	public void uriBuilder() throws Exception {
+		URI uri = new URI("http", "localhost", "/path", "a=1", null);
+		MockServerHttpRequest mockRequest = MockServerHttpRequest.method(HttpMethod.GET, uri).build();
+		DefaultServerRequest request = new DefaultServerRequest(mockRequest.toExchange(), messageReaders);
+
+
+		URI result = request.uriBuilder().build();
+		assertEquals("http", result.getScheme());
+		assertEquals("localhost", result.getHost());
+		assertEquals(-1, result.getPort());
+		assertEquals("/path", result.getPath());
+		assertEquals("a=1", result.getQuery());
+	}
+
 	@Test
 	public void attribute() throws Exception {
 		MockServerHttpRequest mockRequest = MockServerHttpRequest.method(HttpMethod.GET, "http://example.com").build();

spring-webflux/src/test/java/org/springframework/web/reactive/function/server/MockServerRequest.java

@@ -38,6 +38,7 @@ import org.springframework.http.HttpCookie;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpMethod;
 import org.springframework.http.HttpRange;
+import org.springframework.http.HttpRequest;
 import org.springframework.http.MediaType;
 import org.springframework.http.server.PathContainer;
 import org.springframework.http.server.RequestPath;
@@ -49,6 +50,8 @@ import org.springframework.util.LinkedMultiValueMap;
 import org.springframework.util.MultiValueMap;
 import org.springframework.web.reactive.function.BodyExtractor;
 import org.springframework.web.server.WebSession;
+import org.springframework.web.util.UriBuilder;
+import org.springframework.web.util.UriComponentsBuilder;
 
 /**
  * Mock implementation of {@link ServerRequest}.
@@ -118,6 +121,11 @@ public class MockServerRequest implements ServerRequest {
 		return this.uri;
 	}
 
+	@Override
+	public UriBuilder uriBuilder() {
+		return UriComponentsBuilder.fromHttpRequest(new ServerRequestAdapter());
+	}
+
 	@Override
 	public PathContainer pathContainer() {
 		return this.pathContainer;
@@ -466,4 +474,23 @@ public class MockServerRequest implements ServerRequest {
 
 	}
 
+	private final class ServerRequestAdapter implements HttpRequest {
+
+		@Override
+		public String getMethodValue() {
+			return methodName();
+		}
+
+		@Override
+		public URI getURI() {
+			return MockServerRequest.this.uri;
+		}
+
+		@Override
+		public HttpHeaders getHeaders() {
+			return MockServerRequest.this.headers.headers;
+		}
+	}
+
+
 }

spring-webflux/src/test/java/org/springframework/web/reactive/support/WebFluxUriComponentsBuilderTests.java

@@ -1,46 +0,0 @@
-/*
- * Copyright 2002-2017 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.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.web.reactive.support;
-
-import java.net.URI;
-
-import org.junit.Test;
-
-import org.springframework.web.reactive.function.server.MockServerRequest;
-import org.springframework.web.util.UriComponents;
-
-import static org.junit.Assert.*;
-
-/**
- * @author Arjen Poutsma
- */
-public class WebFluxUriComponentsBuilderTests {
-
-	@Test
-	public void fromServerRequest() throws Exception {
-		URI uri = new URI("http", "localhost", "/path", "a=1", null);
-		MockServerRequest request = MockServerRequest.builder().uri(uri).build();
-
-		UriComponents result = WebFluxUriComponentsBuilder.fromServerRequest(request).build();
-		assertEquals("http", result.getScheme());
-		assertEquals("localhost", result.getHost());
-		assertEquals(-1, result.getPort());
-		assertEquals("/path", result.getPath());
-		assertEquals("a=1", result.getQuery());
-	}
-
-}