Deprecate and set trailingSlash option to false

Closes gh-28552

spring-test/src/main/java/org/springframework/test/web/servlet/client/MockMvcWebTestClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -358,7 +358,10 @@ public interface MockMvcWebTestClient {
 		 * Whether to match trailing slashes.
 		 * <p>This is delegated to
 		 * {@link StandaloneMockMvcBuilder#setUseTrailingSlashPatternMatch(boolean)}.
+		 * @deprecated as of 6.0, see
+		 * {@link PathPatternParser#setMatchOptionalTrailingSeparator(boolean)}
 		 */
+		@Deprecated
 		ControllerSpec useTrailingSlashPatternMatch(boolean useTrailingSlashPatternMatch);
 
 		/**

spring-test/src/main/java/org/springframework/test/web/servlet/client/StandaloneMockMvcSpec.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -152,6 +152,7 @@ class StandaloneMockMvcSpec extends AbstractMockMvcServerSpec<MockMvcWebTestClie
 		return this;
 	}
 
+	@SuppressWarnings("deprecation")
 	@Override
 	public StandaloneMockMvcSpec useTrailingSlashPatternMatch(boolean useTrailingSlashPatternMatch) {
 		this.mockMvcBuilder.setUseTrailingSlashPatternMatch(useTrailingSlashPatternMatch);

spring-test/src/main/java/org/springframework/test/web/servlet/setup/StandaloneMockMvcBuilder.java

@@ -343,8 +343,10 @@ public class StandaloneMockMvcBuilder extends AbstractMockMvcBuilder<StandaloneM
 	/**
 	 * Whether to match to URLs irrespective of the presence of a trailing slash.
 	 * If enabled a method mapped to "/users" also matches to "/users/".
-	 * <p>The default value is {@code true}.
+	 * @deprecated as of 6.0, see
+	 * {@link PathPatternParser#setMatchOptionalTrailingSeparator(boolean)}
 	 */
+	@Deprecated
 	public StandaloneMockMvcBuilder setUseTrailingSlashPatternMatch(boolean useTrailingSlashPatternMatch) {
 		this.useTrailingSlashPatternMatch = useTrailingSlashPatternMatch;
 		return this;