Use filter constants

spring-cloud-netflix-core/src/test/java/org/springframework/cloud/netflix/zuul/FormZuulProxyApplicationTests.java

@@ -63,6 +63,7 @@ import org.springframework.web.multipart.MultipartFile;
 
 import static java.nio.charset.Charset.defaultCharset;
 import static org.junit.Assert.assertEquals;
+import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_TYPE;
 import static org.springframework.util.StreamUtils.copyToString;
 
 import lombok.extern.slf4j.Slf4j;
@@ -271,7 +272,7 @@ class FormZuulProxyApplication {
 
 			@Override
 			public String filterType() {
-				return "pre";
+				return PRE_TYPE;
 			}
 
 			@Override

spring-cloud-netflix-core/src/test/java/org/springframework/cloud/netflix/zuul/FormZuulServletProxyApplicationTests.java

@@ -61,6 +61,7 @@ import org.springframework.web.bind.annotation.RestController;
 import org.springframework.web.multipart.MultipartFile;
 
 import static org.junit.Assert.assertEquals;
+import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_TYPE;
 
 import lombok.extern.slf4j.Slf4j;
 
@@ -181,7 +182,7 @@ class FormZuulServletProxyApplication {
 
 			@Override
 			public String filterType() {
-				return "pre";
+				return PRE_TYPE;
 			}
 
 			@Override

spring-cloud-netflix-core/src/test/java/org/springframework/cloud/netflix/zuul/RetryableZuulProxyApplicationTests.java

@@ -37,6 +37,7 @@ import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.RestController;
 
 import static org.junit.Assert.assertEquals;
+import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_TYPE;
 
 @RunWith(SpringJUnit4ClassRunner.class)
 @SpringBootTest(classes = RetryableZuulProxyApplication.class, webEnvironment = WebEnvironment.RANDOM_PORT, value = {
@@ -100,7 +101,7 @@ class RetryableZuulProxyApplication {
 		return new ZuulFilter() {
 			@Override
 			public String filterType() {
-				return "pre";
+				return PRE_TYPE;
 			}
 
 			@Override

spring-cloud-netflix-core/src/test/java/org/springframework/cloud/netflix/zuul/SimpleZuulServerApplicationTests.java

@@ -45,6 +45,7 @@ import org.springframework.web.bind.annotation.RestController;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
+import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_TYPE;
 
 @RunWith(SpringJUnit4ClassRunner.class)
 @SpringBootTest(classes = SimpleZuulServerApplication.class, webEnvironment = WebEnvironment.RANDOM_PORT)
@@ -119,7 +120,7 @@ class SimpleZuulServerApplication {
 		return new ZuulFilter() {
 			@Override
 			public String filterType() {
-				return "pre";
+				return PRE_TYPE;
 			}
 
 			@Override

spring-cloud-netflix-core/src/test/java/org/springframework/cloud/netflix/zuul/filters/post/SendErrorFilterIntegrationTests.java

@@ -47,6 +47,9 @@ import org.springframework.web.bind.annotation.RestController;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;
+import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.POST_TYPE;
+import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_TYPE;
+import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.ROUTE_TYPE;
 
 /**
  * @author Spencer Gibb
@@ -111,7 +114,7 @@ public class SendErrorFilterIntegrationTests {
 			return new FailureFilter() {
 				@Override
 				public String filterType() {
-					return "pre";
+					return PRE_TYPE;
 				}
 			};
 		}
@@ -121,7 +124,7 @@ public class SendErrorFilterIntegrationTests {
 			return new FailureFilter() {
 				@Override
 				public String filterType() {
-					return "route";
+					return ROUTE_TYPE;
 				}
 			};
 		}
@@ -131,7 +134,7 @@ public class SendErrorFilterIntegrationTests {
 			return new FailureFilter() {
 				@Override
 				public String filterType() {
-					return "post";
+					return POST_TYPE;
 				}
 			};
 		}

spring-cloud-netflix-core/src/test/java/org/springframework/cloud/netflix/zuul/filters/pre/PreDecorationFilterTests.java

@@ -42,6 +42,7 @@ import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.MockitoAnnotations.initMocks;
 import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.FORWARD_TO_KEY;
+import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_TYPE;
 import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.REQUEST_URI_KEY;
 import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.SERVICE_ID_KEY;
 
@@ -85,7 +86,7 @@ public class PreDecorationFilterTests {
 	public void basicProperties() throws Exception {
 		assertEquals(5, this.filter.filterOrder());
 		assertEquals(true, this.filter.shouldFilter());
-		assertEquals("pre", this.filter.filterType());
+		assertEquals(PRE_TYPE, this.filter.filterType());
 	}
 
 	@Test

spring-cloud-netflix-core/src/test/java/org/springframework/cloud/netflix/zuul/filters/route/support/ZuulProxyTestBase.java

@@ -82,6 +82,7 @@ import static org.hamcrest.Matchers.is;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assume.assumeThat;
+import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_TYPE;
 
 /**
  * @author Spencer Gibb
@@ -406,7 +407,7 @@ public abstract class ZuulProxyTestBase {
 			return new ZuulFilter() {
 				@Override
 				public String filterType() {
-					return "pre";
+					return PRE_TYPE;
 				}
 
 				@Override