Use assertThat from Hamcrest instead of JUnit 4

org.junit.Assert.assertThat() is deprecated as of JUnit 4.13.

See gh-22894

spring-test/src/test/java/org/springframework/mock/web/MockFilterChainTests.java

@@ -29,6 +29,7 @@ import org.junit.Before;
 import org.junit.Test;
 
 import static org.hamcrest.Matchers.*;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.Assert.*;
 import static org.mockito.BDDMockito.*;
 

spring-test/src/test/java/org/springframework/test/context/ContextHierarchyDirtiesContextTests.java

@@ -35,6 +35,7 @@ import org.springframework.test.annotation.DirtiesContext.HierarchyMode;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
 import static org.hamcrest.CoreMatchers.*;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.Assert.*;
 
 /**

spring-test/src/test/java/org/springframework/test/context/TestContextConcurrencyTests.java

@@ -27,8 +27,8 @@ import org.junit.Test;
 import static java.util.Arrays.stream;
 import static java.util.stream.Collectors.toCollection;
 import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertThat;
 
 /**
  * Integration tests that verify proper concurrency support between a

spring-test/src/test/java/org/springframework/test/context/configuration/interfaces/TestPropertySourceInterfaceTests.java

@@ -25,7 +25,7 @@ import org.springframework.core.env.Environment;
 import org.springframework.test.context.junit4.SpringRunner;
 
 import static org.hamcrest.CoreMatchers.*;
-import static org.junit.Assert.*;
+import static org.hamcrest.MatcherAssert.assertThat;
 
 /**
  * @author Sam Brannen

spring-test/src/test/java/org/springframework/test/context/env/InlinedPropertiesTestPropertySourceTests.java

@@ -28,6 +28,7 @@ import org.springframework.test.context.TestPropertySource;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
 import static org.hamcrest.CoreMatchers.*;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.Assert.*;
 import static org.springframework.test.context.support.TestPropertySourceUtils.*;
 

spring-test/src/test/java/org/springframework/test/context/event/EventPublishingTestExecutionListenerIntegrationTests.java

@@ -55,7 +55,7 @@ import static java.lang.annotation.ElementType.METHOD;
 import static java.lang.annotation.RetentionPolicy.RUNTIME;
 import static org.hamcrest.CoreMatchers.equalTo;
 import static org.hamcrest.CoreMatchers.startsWith;
-import static org.junit.Assert.assertThat;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.only;

spring-test/src/test/java/org/springframework/test/context/junit4/spr6128/AutowiredQualifierTests.java

@@ -24,8 +24,8 @@ import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.core.IsEqual.*;
-import static org.junit.Assert.*;
 
 /**
  * Integration tests to verify claims made in <a

spring-test/src/test/java/org/springframework/test/context/support/ContextLoaderUtilsContextHierarchyTests.java

@@ -32,6 +32,7 @@ import org.springframework.test.context.ContextHierarchy;
 import org.springframework.test.context.ContextLoader;
 
 import static org.hamcrest.CoreMatchers.*;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.Assert.*;
 import static org.springframework.test.context.support.ContextLoaderUtils.*;
 

spring-test/src/test/java/org/springframework/test/jdbc/JdbcTestUtilsTests.java

@@ -24,7 +24,7 @@ import org.mockito.junit.MockitoJUnitRunner;
 import org.springframework.jdbc.core.JdbcTemplate;
 
 import static org.hamcrest.Matchers.*;
-import static org.junit.Assert.*;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.mockito.BDDMockito.*;
 
 /**

spring-test/src/test/java/org/springframework/test/util/AopTestUtilsTests.java

@@ -22,6 +22,7 @@ import org.springframework.aop.framework.ProxyFactory;
 import org.springframework.aop.support.AopUtils;
 
 import static org.hamcrest.CoreMatchers.*;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.Assert.*;
 import static org.springframework.test.util.AopTestUtils.*;
 

spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/ResponseEntityTests.java

@@ -41,6 +41,7 @@ import org.springframework.web.bind.annotation.RestController;
 
 import static java.time.Duration.*;
 import static org.hamcrest.CoreMatchers.*;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.Assert.*;
 import static org.springframework.http.MediaType.*;
 

spring-test/src/test/java/org/springframework/test/web/servlet/htmlunit/DelegatingWebConnectionTests.java

@@ -41,9 +41,9 @@ import org.springframework.tests.TestGroup;
 
 import static org.hamcrest.CoreMatchers.equalTo;
 import static org.hamcrest.CoreMatchers.sameInstance;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.*;
 import static org.hamcrest.core.IsNot.not;
-import static org.junit.Assert.*;
 import static org.mockito.Mockito.*;
 
 /**

spring-test/src/test/java/org/springframework/test/web/servlet/htmlunit/HtmlUnitRequestBuilderTests.java

@@ -46,6 +46,7 @@ import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.setup.MockMvcBuilders;
 
 import static java.util.Arrays.asList;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.contains;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.isEmptyString;
@@ -53,7 +54,6 @@ import static org.hamcrest.Matchers.not;
 import static org.hamcrest.Matchers.notNullValue;
 import static org.hamcrest.Matchers.nullValue;
 import static org.hamcrest.Matchers.sameInstance;
-import static org.junit.Assert.assertThat;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
 
 /**

spring-test/src/test/java/org/springframework/test/web/servlet/htmlunit/MockMvcConnectionBuilderSupportTests.java

@@ -43,8 +43,8 @@ import org.springframework.web.servlet.config.annotation.EnableWebMvc;
 
 import static org.hamcrest.CoreMatchers.equalTo;
 import static org.hamcrest.CoreMatchers.nullValue;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.notNullValue;
-import static org.junit.Assert.assertThat;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 

spring-test/src/test/java/org/springframework/test/web/servlet/htmlunit/MockMvcWebClientBuilderTests.java

@@ -49,7 +49,7 @@ import org.springframework.web.context.WebApplicationContext;
 import org.springframework.web.servlet.config.annotation.EnableWebMvc;
 
 import static org.hamcrest.CoreMatchers.*;
-import static org.junit.Assert.*;
+import static org.hamcrest.MatcherAssert.assertThat;
 
 /**
  * Integration tests for {@link MockMvcWebClientBuilder}.

spring-test/src/test/java/org/springframework/test/web/servlet/htmlunit/MockMvcWebConnectionTests.java

@@ -27,6 +27,7 @@ import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.setup.MockMvcBuilders;
 
 import static org.hamcrest.CoreMatchers.*;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.Assert.*;
 
 /**

spring-test/src/test/java/org/springframework/test/web/servlet/htmlunit/MockWebResponseBuilderTests.java

@@ -30,7 +30,7 @@ import org.junit.Test;
 import org.springframework.mock.web.MockHttpServletResponse;
 
 import static org.hamcrest.CoreMatchers.*;
-import static org.junit.Assert.*;
+import static org.hamcrest.MatcherAssert.assertThat;
 
 /**
  * Tests for {@link MockWebResponseBuilder}.

spring-test/src/test/java/org/springframework/test/web/servlet/htmlunit/webdriver/MockMvcHtmlUnitDriverBuilderTests.java

@@ -41,6 +41,7 @@ import org.springframework.web.context.WebApplicationContext;
 import org.springframework.web.servlet.config.annotation.EnableWebMvc;
 
 import static org.hamcrest.CoreMatchers.*;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.Assert.*;
 
 /**

spring-test/src/test/java/org/springframework/test/web/servlet/samples/spr/CustomRequestAttributesRequestContextHolderTests.java

@@ -44,7 +44,7 @@ import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 import static org.hamcrest.CoreMatchers.instanceOf;
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.CoreMatchers.nullValue;
-import static org.junit.Assert.assertThat;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
 import static org.springframework.test.web.servlet.setup.MockMvcBuilders.webAppContextSetup;

spring-test/src/test/java/org/springframework/test/web/servlet/samples/spr/RequestContextHolderTests.java

@@ -52,6 +52,7 @@ import org.springframework.web.servlet.config.annotation.EnableWebMvc;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
 import static org.hamcrest.CoreMatchers.*;
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.Assert.*;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;