Use Gradle test fixture support for spring-core

See gh-23550

spring-webmvc/src/test/java/org/springframework/web/servlet/DispatcherServletTests.java

@@ -35,7 +35,6 @@ import org.springframework.beans.PropertyValue;
 import org.springframework.context.ApplicationContextInitializer;
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.core.env.ConfigurableEnvironment;
-import org.springframework.core.env.DummyEnvironment;
 import org.springframework.http.HttpHeaders;
 import org.springframework.mock.web.test.MockHttpServletRequest;
 import org.springframework.mock.web.test.MockHttpServletResponse;

spring-webmvc/src/test/java/org/springframework/web/servlet/DummyEnvironment.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright 2002-2019 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
+ *
+ *      https://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.servlet;
+
+import org.springframework.core.env.Environment;
+import org.springframework.core.env.Profiles;
+
+class DummyEnvironment implements Environment {
+
+	@Override
+	public boolean containsProperty(String key) {
+		return false;
+	}
+
+	@Override
+	public String getProperty(String key) {
+		return null;
+	}
+
+	@Override
+	public String getProperty(String key, String defaultValue) {
+		return null;
+	}
+
+	@Override
+	public <T> T getProperty(String key, Class<T> targetType) {
+		return null;
+	}
+
+	@Override
+	public <T> T getProperty(String key, Class<T> targetType, T defaultValue) {
+		return null;
+	}
+
+	@Override
+	public String getRequiredProperty(String key) throws IllegalStateException {
+		return null;
+	}
+
+	@Override
+	public <T> T getRequiredProperty(String key, Class<T> targetType) throws IllegalStateException {
+		return null;
+	}
+
+	@Override
+	public String resolvePlaceholders(String text) {
+		return null;
+	}
+
+	@Override
+	public String resolveRequiredPlaceholders(String text) throws IllegalArgumentException {
+		return null;
+	}
+
+	@Override
+	public String[] getActiveProfiles() {
+		return null;
+	}
+
+	@Override
+	public String[] getDefaultProfiles() {
+		return null;
+	}
+
+	@Deprecated
+	@Override
+	public boolean acceptsProfiles(String... profiles) {
+		return false;
+	}
+
+	@Override
+	public boolean acceptsProfiles(Profiles profiles) {
+		return false;
+	}
+
+}

spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/ServletAnnotationControllerHandlerMethodTests.java

@@ -74,6 +74,7 @@ import org.springframework.context.annotation.AnnotationConfigUtils;
 import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
 import org.springframework.core.MethodParameter;
 import org.springframework.core.convert.converter.Converter;
+import org.springframework.core.test.fixtures.io.SerializationTestUtils;
 import org.springframework.format.annotation.DateTimeFormat;
 import org.springframework.format.support.DefaultFormattingConversionService;
 import org.springframework.format.support.FormattingConversionServiceFactoryBean;
@@ -110,7 +111,6 @@ import org.springframework.ui.Model;
 import org.springframework.ui.ModelMap;
 import org.springframework.util.Assert;
 import org.springframework.util.MultiValueMap;
-import org.springframework.util.SerializationTestUtils;
 import org.springframework.util.StringUtils;
 import org.springframework.validation.BindingResult;
 import org.springframework.validation.Errors;

spring-webmvc/src/test/java/org/springframework/web/servlet/view/feed/AtomFeedViewTests.java

@@ -29,9 +29,9 @@ import com.rometools.rome.feed.atom.Entry;
 import com.rometools.rome.feed.atom.Feed;
 import org.junit.jupiter.api.Test;
 
+import org.springframework.core.test.fixtures.xml.XmlContent;
 import org.springframework.mock.web.test.MockHttpServletRequest;
 import org.springframework.mock.web.test.MockHttpServletResponse;
-import org.springframework.tests.XmlContent;
 
 import static org.assertj.core.api.Assertions.assertThat;
 

spring-webmvc/src/test/java/org/springframework/web/servlet/view/feed/RssFeedViewTests.java

@@ -29,9 +29,9 @@ import com.rometools.rome.feed.rss.Description;
 import com.rometools.rome.feed.rss.Item;
 import org.junit.jupiter.api.Test;
 
+import org.springframework.core.test.fixtures.xml.XmlContent;
 import org.springframework.mock.web.test.MockHttpServletRequest;
 import org.springframework.mock.web.test.MockHttpServletResponse;
-import org.springframework.tests.XmlContent;
 
 import static org.assertj.core.api.Assertions.assertThat;