Polish LocaleResolver tests

spring-webmvc/src/test/java/org/springframework/web/servlet/i18n/AcceptHeaderLocaleResolverTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 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.
@@ -43,49 +43,49 @@ import static org.assertj.core.api.Assertions.assertThat;
  * @author Rossen Stoyanchev
  * @author Juergen Hoeller
  */
-public class AcceptHeaderLocaleResolverTests {
+class AcceptHeaderLocaleResolverTests {
 
 	private final AcceptHeaderLocaleResolver resolver = new AcceptHeaderLocaleResolver();
 
 
 	@Test
-	public void resolve() {
+	void resolve() {
 		assertThat(this.resolver.resolveLocale(request(CANADA))).isEqualTo(CANADA);
 		assertThat(this.resolver.resolveLocale(request(US, CANADA))).isEqualTo(US);
 	}
 
 	@Test
-	public void resolvePreferredSupported() {
+	void resolvePreferredSupported() {
 		this.resolver.setSupportedLocales(Collections.singletonList(CANADA));
 		assertThat(this.resolver.resolveLocale(request(US, CANADA))).isEqualTo(CANADA);
 	}
 
 	@Test
-	public void resolvePreferredNotSupported() {
+	void resolvePreferredNotSupported() {
 		this.resolver.setSupportedLocales(Collections.singletonList(CANADA));
 		assertThat(this.resolver.resolveLocale(request(US, UK))).isEqualTo(US);
 	}
 
 	@Test
-	public void resolvePreferredAgainstLanguageOnly() {
+	void resolvePreferredAgainstLanguageOnly() {
 		this.resolver.setSupportedLocales(Collections.singletonList(ENGLISH));
 		assertThat(this.resolver.resolveLocale(request(GERMANY, US, UK))).isEqualTo(ENGLISH);
 	}
 
 	@Test
-	public void resolvePreferredAgainstCountryIfPossible() {
+	void resolvePreferredAgainstCountryIfPossible() {
 		this.resolver.setSupportedLocales(Arrays.asList(ENGLISH, UK));
 		assertThat(this.resolver.resolveLocale(request(GERMANY, US, UK))).isEqualTo(UK);
 	}
 
 	@Test
-	public void resolvePreferredAgainstLanguageWithMultipleSupportedLocales() {
+	void resolvePreferredAgainstLanguageWithMultipleSupportedLocales() {
 		this.resolver.setSupportedLocales(Arrays.asList(GERMAN, US));
 		assertThat(this.resolver.resolveLocale(request(GERMANY, US, UK))).isEqualTo(GERMAN);
 	}
 
 	@Test
-	public void resolvePreferredNotSupportedWithDefault() {
+	void resolvePreferredNotSupportedWithDefault() {
 		this.resolver.setSupportedLocales(Arrays.asList(US, JAPAN));
 		this.resolver.setDefaultLocale(Locale.JAPAN);
 
@@ -96,7 +96,7 @@ public class AcceptHeaderLocaleResolverTests {
 	}
 
 	@Test
-	public void defaultLocale() {
+	void defaultLocale() {
 		this.resolver.setDefaultLocale(JAPANESE);
 		MockHttpServletRequest request = new MockHttpServletRequest();
 		assertThat(this.resolver.resolveLocale(request)).isEqualTo(JAPANESE);

spring-webmvc/src/test/java/org/springframework/web/servlet/i18n/CookieLocaleResolverTests.java

@@ -36,123 +36,109 @@ import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
 
 /**
+ * Unit tests for {@link CookieLocaleResolver}.
+ *
  * @author Alef Arendsen
  * @author Juergen Hoeller
  * @author Rick Evans
+ * @author Sam Brannen
  */
-public class CookieLocaleResolverTests {
+class CookieLocaleResolverTests {
+
+	private MockHttpServletRequest request = new MockHttpServletRequest();
+
+	private MockHttpServletResponse response = new MockHttpServletResponse();
+
+	private CookieLocaleResolver resolver = new CookieLocaleResolver();
+
 
 	@Test
-	public void testResolveLocale() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void resolveLocale() {
 		Cookie cookie = new Cookie("LanguageKoekje", "nl");
 		request.setCookies(cookie);
 
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
 		resolver.setCookieName("LanguageKoekje");
 		Locale loc = resolver.resolveLocale(request);
 		assertThat(loc.getLanguage()).isEqualTo("nl");
 	}
 
 	@Test
-	public void testResolveLocaleContext() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void resolveLocaleContext() {
 		Cookie cookie = new Cookie("LanguageKoekje", "nl");
 		request.setCookies(cookie);
 
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
 		resolver.setCookieName("LanguageKoekje");
 		LocaleContext loc = resolver.resolveLocaleContext(request);
 		assertThat(loc.getLocale().getLanguage()).isEqualTo("nl");
-		boolean condition = loc instanceof TimeZoneAwareLocaleContext;
-		assertThat(condition).isTrue();
+		assertThat(loc).isInstanceOf(TimeZoneAwareLocaleContext.class);
 		assertThat(((TimeZoneAwareLocaleContext) loc).getTimeZone()).isNull();
 	}
 
 	@Test
-	public void testResolveLocaleContextWithTimeZone() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void resolveLocaleContextWithTimeZone() {
 		Cookie cookie = new Cookie("LanguageKoekje", "nl GMT+1");
 		request.setCookies(cookie);
 
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
 		resolver.setCookieName("LanguageKoekje");
 		LocaleContext loc = resolver.resolveLocaleContext(request);
 		assertThat(loc.getLocale().getLanguage()).isEqualTo("nl");
-		boolean condition = loc instanceof TimeZoneAwareLocaleContext;
-		assertThat(condition).isTrue();
+		assertThat(loc).isInstanceOf(TimeZoneAwareLocaleContext.class);
 		assertThat(((TimeZoneAwareLocaleContext) loc).getTimeZone()).isEqualTo(TimeZone.getTimeZone("GMT+1"));
 	}
 
 	@Test
-	public void testResolveLocaleContextWithInvalidLocale() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void resolveLocaleContextWithInvalidLocale() {
 		Cookie cookie = new Cookie("LanguageKoekje", "++ GMT+1");
 		request.setCookies(cookie);
 
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
 		resolver.setCookieName("LanguageKoekje");
-		assertThatIllegalStateException().isThrownBy(() ->
-				resolver.resolveLocaleContext(request))
+		assertThatIllegalStateException().isThrownBy(() -> resolver.resolveLocaleContext(request))
 			.withMessageContaining("LanguageKoekje")
 			.withMessageContaining("++ GMT+1");
 	}
 
 	@Test
-	public void testResolveLocaleContextWithInvalidLocaleOnErrorDispatch() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void resolveLocaleContextWithInvalidLocaleOnErrorDispatch() {
 		request.addPreferredLocale(Locale.GERMAN);
 		request.setAttribute(WebUtils.ERROR_EXCEPTION_ATTRIBUTE, new ServletException());
 		Cookie cookie = new Cookie("LanguageKoekje", "++ GMT+1");
 		request.setCookies(cookie);
 
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
 		resolver.setDefaultTimeZone(TimeZone.getTimeZone("GMT+2"));
 		resolver.setCookieName("LanguageKoekje");
 		LocaleContext loc = resolver.resolveLocaleContext(request);
 		assertThat(loc.getLocale()).isEqualTo(Locale.GERMAN);
-		boolean condition = loc instanceof TimeZoneAwareLocaleContext;
-		assertThat(condition).isTrue();
+		assertThat(loc).isInstanceOf(TimeZoneAwareLocaleContext.class);
 		assertThat(((TimeZoneAwareLocaleContext) loc).getTimeZone()).isEqualTo(TimeZone.getTimeZone("GMT+2"));
 	}
 
 	@Test
-	public void testResolveLocaleContextWithInvalidTimeZone() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void resolveLocaleContextWithInvalidTimeZone() {
 		Cookie cookie = new Cookie("LanguageKoekje", "nl X-MT");
 		request.setCookies(cookie);
 
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
 		resolver.setCookieName("LanguageKoekje");
-		assertThatIllegalStateException().isThrownBy(() ->
-				resolver.resolveLocaleContext(request))
+		assertThatIllegalStateException().isThrownBy(() -> resolver.resolveLocaleContext(request))
 			.withMessageContaining("LanguageKoekje")
 			.withMessageContaining("nl X-MT");
 	}
 
 	@Test
-	public void testResolveLocaleContextWithInvalidTimeZoneOnErrorDispatch() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void resolveLocaleContextWithInvalidTimeZoneOnErrorDispatch() {
 		request.setAttribute(WebUtils.ERROR_EXCEPTION_ATTRIBUTE, new ServletException());
 		Cookie cookie = new Cookie("LanguageKoekje", "nl X-MT");
 		request.setCookies(cookie);
 
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
 		resolver.setDefaultTimeZone(TimeZone.getTimeZone("GMT+2"));
 		resolver.setCookieName("LanguageKoekje");
 		LocaleContext loc = resolver.resolveLocaleContext(request);
 		assertThat(loc.getLocale().getLanguage()).isEqualTo("nl");
-		boolean condition = loc instanceof TimeZoneAwareLocaleContext;
-		assertThat(condition).isTrue();
+		assertThat(loc).isInstanceOf(TimeZoneAwareLocaleContext.class);
 		assertThat(((TimeZoneAwareLocaleContext) loc).getTimeZone()).isEqualTo(TimeZone.getTimeZone("GMT+2"));
 	}
 
 	@Test
-	public void testSetAndResolveLocale() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
-		MockHttpServletResponse response = new MockHttpServletResponse();
-
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
+	void setAndResolveLocale() {
 		resolver.setLocale(request, response, new Locale("nl", ""));
 
 		Cookie cookie = response.getCookie(CookieLocaleResolver.DEFAULT_COOKIE_NAME);
@@ -171,11 +157,7 @@ public class CookieLocaleResolverTests {
 	}
 
 	@Test
-	public void testSetAndResolveLocaleContext() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
-		MockHttpServletResponse response = new MockHttpServletResponse();
-
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
+	void setAndResolveLocaleContext() {
 		resolver.setLocaleContext(request, response, new SimpleLocaleContext(new Locale("nl", "")));
 
 		Cookie cookie = response.getCookie(CookieLocaleResolver.DEFAULT_COOKIE_NAME);
@@ -185,17 +167,12 @@ public class CookieLocaleResolverTests {
 		resolver = new CookieLocaleResolver();
 		LocaleContext loc = resolver.resolveLocaleContext(request);
 		assertThat(loc.getLocale().getLanguage()).isEqualTo("nl");
-		boolean condition = loc instanceof TimeZoneAwareLocaleContext;
-		assertThat(condition).isTrue();
+		assertThat(loc).isInstanceOf(TimeZoneAwareLocaleContext.class);
 		assertThat(((TimeZoneAwareLocaleContext) loc).getTimeZone()).isNull();
 	}
 
 	@Test
-	public void testSetAndResolveLocaleContextWithTimeZone() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
-		MockHttpServletResponse response = new MockHttpServletResponse();
-
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
+	void setAndResolveLocaleContextWithTimeZone() {
 		resolver.setLocaleContext(request, response,
 				new SimpleTimeZoneAwareLocaleContext(new Locale("nl", ""), TimeZone.getTimeZone("GMT+1")));
 
@@ -206,17 +183,12 @@ public class CookieLocaleResolverTests {
 		resolver = new CookieLocaleResolver();
 		LocaleContext loc = resolver.resolveLocaleContext(request);
 		assertThat(loc.getLocale().getLanguage()).isEqualTo("nl");
-		boolean condition = loc instanceof TimeZoneAwareLocaleContext;
-		assertThat(condition).isTrue();
+		assertThat(loc).isInstanceOf(TimeZoneAwareLocaleContext.class);
 		assertThat(((TimeZoneAwareLocaleContext) loc).getTimeZone()).isEqualTo(TimeZone.getTimeZone("GMT+1"));
 	}
 
 	@Test
-	public void testSetAndResolveLocaleContextWithTimeZoneOnly() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
-		MockHttpServletResponse response = new MockHttpServletResponse();
-
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
+	void setAndResolveLocaleContextWithTimeZoneOnly() {
 		resolver.setLocaleContext(request, response,
 				new SimpleTimeZoneAwareLocaleContext(null, TimeZone.getTimeZone("GMT+1")));
 
@@ -228,17 +200,12 @@ public class CookieLocaleResolverTests {
 		resolver = new CookieLocaleResolver();
 		LocaleContext loc = resolver.resolveLocaleContext(request);
 		assertThat(loc.getLocale()).isEqualTo(Locale.GERMANY);
-		boolean condition = loc instanceof TimeZoneAwareLocaleContext;
-		assertThat(condition).isTrue();
+		assertThat(loc).isInstanceOf(TimeZoneAwareLocaleContext.class);
 		assertThat(((TimeZoneAwareLocaleContext) loc).getTimeZone()).isEqualTo(TimeZone.getTimeZone("GMT+1"));
 	}
 
 	@Test
-	public void testSetAndResolveLocaleWithCountry() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
-		MockHttpServletResponse response = new MockHttpServletResponse();
-
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
+	void setAndResolveLocaleWithCountry() {
 		resolver.setLocale(request, response, new Locale("de", "AT"));
 
 		Cookie cookie = response.getCookie(CookieLocaleResolver.DEFAULT_COOKIE_NAME);
@@ -259,11 +226,7 @@ public class CookieLocaleResolverTests {
 	}
 
 	@Test
-	public void testSetAndResolveLocaleWithCountryAsLegacyJava() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
-		MockHttpServletResponse response = new MockHttpServletResponse();
-
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
+	void setAndResolveLocaleWithCountryAsLegacyJava() {
 		resolver.setLanguageTagCompliant(false);
 		resolver.setLocale(request, response, new Locale("de", "AT"));
 
@@ -285,11 +248,7 @@ public class CookieLocaleResolverTests {
 	}
 
 	@Test
-	public void testCustomCookie() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
-		MockHttpServletResponse response = new MockHttpServletResponse();
-
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
+	void customCookie() {
 		resolver.setCookieName("LanguageKoek");
 		resolver.setCookieDomain(".springframework.org");
 		resolver.setCookiePath("/mypath");
@@ -315,36 +274,27 @@ public class CookieLocaleResolverTests {
 	}
 
 	@Test
-	public void testResolveLocaleWithoutCookie() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void resolveLocaleWithoutCookie() {
 		request.addPreferredLocale(Locale.TAIWAN);
 
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
-
 		Locale loc = resolver.resolveLocale(request);
 		assertThat(loc).isEqualTo(request.getLocale());
 	}
 
 	@Test
-	public void testResolveLocaleContextWithoutCookie() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void resolveLocaleContextWithoutCookie() {
 		request.addPreferredLocale(Locale.TAIWAN);
 
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
-
 		LocaleContext loc = resolver.resolveLocaleContext(request);
 		assertThat(loc.getLocale()).isEqualTo(request.getLocale());
-		boolean condition = loc instanceof TimeZoneAwareLocaleContext;
-		assertThat(condition).isTrue();
+		assertThat(loc).isInstanceOf(TimeZoneAwareLocaleContext.class);
 		assertThat(((TimeZoneAwareLocaleContext) loc).getTimeZone()).isNull();
 	}
 
 	@Test
-	public void testResolveLocaleWithoutCookieAndDefaultLocale() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void resolveLocaleWithoutCookieAndDefaultLocale() {
 		request.addPreferredLocale(Locale.TAIWAN);
 
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
 		resolver.setDefaultLocale(Locale.GERMAN);
 
 		Locale loc = resolver.resolveLocale(request);
@@ -352,79 +302,63 @@ public class CookieLocaleResolverTests {
 	}
 
 	@Test
-	public void testResolveLocaleContextWithoutCookieAndDefaultLocale() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void resolveLocaleContextWithoutCookieAndDefaultLocale() {
 		request.addPreferredLocale(Locale.TAIWAN);
 
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
 		resolver.setDefaultLocale(Locale.GERMAN);
 		resolver.setDefaultTimeZone(TimeZone.getTimeZone("GMT+1"));
 
 		LocaleContext loc = resolver.resolveLocaleContext(request);
 		assertThat(loc.getLocale()).isEqualTo(Locale.GERMAN);
-		boolean condition = loc instanceof TimeZoneAwareLocaleContext;
-		assertThat(condition).isTrue();
+		assertThat(loc).isInstanceOf(TimeZoneAwareLocaleContext.class);
 		assertThat(((TimeZoneAwareLocaleContext) loc).getTimeZone()).isEqualTo(TimeZone.getTimeZone("GMT+1"));
 	}
 
 	@Test
-	public void testResolveLocaleWithCookieWithoutLocale() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void resolveLocaleWithCookieWithoutLocale() {
 		request.addPreferredLocale(Locale.TAIWAN);
 		Cookie cookie = new Cookie(CookieLocaleResolver.DEFAULT_COOKIE_NAME, "");
 		request.setCookies(cookie);
 
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
-
 		Locale loc = resolver.resolveLocale(request);
 		assertThat(loc).isEqualTo(request.getLocale());
 	}
 
 	@Test
-	public void testResolveLocaleContextWithCookieWithoutLocale() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void resolveLocaleContextWithCookieWithoutLocale() {
 		request.addPreferredLocale(Locale.TAIWAN);
 		Cookie cookie = new Cookie(CookieLocaleResolver.DEFAULT_COOKIE_NAME, "");
 		request.setCookies(cookie);
 
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
-
 		LocaleContext loc = resolver.resolveLocaleContext(request);
 		assertThat(loc.getLocale()).isEqualTo(request.getLocale());
-		boolean condition = loc instanceof TimeZoneAwareLocaleContext;
-		assertThat(condition).isTrue();
+		assertThat(loc).isInstanceOf(TimeZoneAwareLocaleContext.class);
 		assertThat(((TimeZoneAwareLocaleContext) loc).getTimeZone()).isNull();
 	}
 
 	@Test
-	public void testSetLocaleToNull() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void setLocaleToNull() {
 		request.addPreferredLocale(Locale.TAIWAN);
 		Cookie cookie = new Cookie(CookieLocaleResolver.DEFAULT_COOKIE_NAME, Locale.UK.toString());
 		request.setCookies(cookie);
-		MockHttpServletResponse response = new MockHttpServletResponse();
 
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
 		resolver.setLocale(request, response, null);
 		Locale locale = (Locale) request.getAttribute(CookieLocaleResolver.LOCALE_REQUEST_ATTRIBUTE_NAME);
 		assertThat(locale).isEqualTo(Locale.TAIWAN);
 
 		Cookie[] cookies = response.getCookies();
-		assertThat(cookies.length).isEqualTo(1);
+		assertThat(cookies).hasSize(1);
 		Cookie localeCookie = cookies[0];
 		assertThat(localeCookie.getName()).isEqualTo(CookieLocaleResolver.DEFAULT_COOKIE_NAME);
 		assertThat(localeCookie.getValue()).isEqualTo("");
 	}
 
 	@Test
-	public void testSetLocaleContextToNull() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void setLocaleContextToNull() {
 		request.addPreferredLocale(Locale.TAIWAN);
 		Cookie cookie = new Cookie(CookieLocaleResolver.DEFAULT_COOKIE_NAME, Locale.UK.toString());
 		request.setCookies(cookie);
-		MockHttpServletResponse response = new MockHttpServletResponse();
 
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
 		resolver.setLocaleContext(request, response, null);
 		Locale locale = (Locale) request.getAttribute(CookieLocaleResolver.LOCALE_REQUEST_ATTRIBUTE_NAME);
 		assertThat(locale).isEqualTo(Locale.TAIWAN);
@@ -432,42 +366,36 @@ public class CookieLocaleResolverTests {
 		assertThat(timeZone).isNull();
 
 		Cookie[] cookies = response.getCookies();
-		assertThat(cookies.length).isEqualTo(1);
+		assertThat(cookies).hasSize(1);
 		Cookie localeCookie = cookies[0];
 		assertThat(localeCookie.getName()).isEqualTo(CookieLocaleResolver.DEFAULT_COOKIE_NAME);
 		assertThat(localeCookie.getValue()).isEqualTo("");
 	}
 
 	@Test
-	public void testSetLocaleToNullWithDefault() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void setLocaleToNullWithDefault() {
 		request.addPreferredLocale(Locale.TAIWAN);
 		Cookie cookie = new Cookie(CookieLocaleResolver.DEFAULT_COOKIE_NAME, Locale.UK.toString());
 		request.setCookies(cookie);
-		MockHttpServletResponse response = new MockHttpServletResponse();
 
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
 		resolver.setDefaultLocale(Locale.CANADA_FRENCH);
 		resolver.setLocale(request, response, null);
 		Locale locale = (Locale) request.getAttribute(CookieLocaleResolver.LOCALE_REQUEST_ATTRIBUTE_NAME);
 		assertThat(locale).isEqualTo(Locale.CANADA_FRENCH);
 
 		Cookie[] cookies = response.getCookies();
-		assertThat(cookies.length).isEqualTo(1);
+		assertThat(cookies).hasSize(1);
 		Cookie localeCookie = cookies[0];
 		assertThat(localeCookie.getName()).isEqualTo(CookieLocaleResolver.DEFAULT_COOKIE_NAME);
 		assertThat(localeCookie.getValue()).isEqualTo("");
 	}
 
 	@Test
-	public void testSetLocaleContextToNullWithDefault() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void setLocaleContextToNullWithDefault() {
 		request.addPreferredLocale(Locale.TAIWAN);
 		Cookie cookie = new Cookie(CookieLocaleResolver.DEFAULT_COOKIE_NAME, Locale.UK.toString());
 		request.setCookies(cookie);
-		MockHttpServletResponse response = new MockHttpServletResponse();
 
-		CookieLocaleResolver resolver = new CookieLocaleResolver();
 		resolver.setDefaultLocale(Locale.CANADA_FRENCH);
 		resolver.setDefaultTimeZone(TimeZone.getTimeZone("GMT+1"));
 		resolver.setLocaleContext(request, response, null);
@@ -477,7 +405,7 @@ public class CookieLocaleResolverTests {
 		assertThat(timeZone).isEqualTo(TimeZone.getTimeZone("GMT+1"));
 
 		Cookie[] cookies = response.getCookies();
-		assertThat(cookies.length).isEqualTo(1);
+		assertThat(cookies).hasSize(1);
 		Cookie localeCookie = cookies[0];
 		assertThat(localeCookie.getName()).isEqualTo(CookieLocaleResolver.DEFAULT_COOKIE_NAME);
 		assertThat(localeCookie.getValue()).isEqualTo("");

spring-webmvc/src/test/java/org/springframework/web/servlet/i18n/LocaleResolverTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 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.
@@ -35,28 +35,30 @@ import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.fail;
 
 /**
+ * Unit tests for various {@link LocaleResolver} implementations.
+ *
  * @author Juergen Hoeller
  * @since 20.03.2003
  */
-public class LocaleResolverTests {
+class LocaleResolverTests {
 
 	@Test
-	public void testAcceptHeaderLocaleResolver() {
+	void acceptHeaderLocaleResolver() {
 		doTest(new AcceptHeaderLocaleResolver(), false);
 	}
 
 	@Test
-	public void testFixedLocaleResolver() {
+	void fixedLocaleResolver() {
 		doTest(new FixedLocaleResolver(Locale.UK), false);
 	}
 
 	@Test
-	public void testCookieLocaleResolver() {
+	void cookieLocaleResolver() {
 		doTest(new CookieLocaleResolver(), true);
 	}
 
 	@Test
-	public void testSessionLocaleResolver() {
+	void sessionLocaleResolver() {
 		doTest(new SessionLocaleResolver(), true);
 	}
 

spring-webmvc/src/test/java/org/springframework/web/servlet/i18n/SessionLocaleResolverTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 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.
@@ -28,25 +28,29 @@ import org.springframework.web.testfixture.servlet.MockHttpServletResponse;
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**
+ * Unit tests for {@link SessionLocaleResolver}.
+ *
  * @author Juergen Hoeller
+ * @author Sam Brannen
  */
-public class SessionLocaleResolverTests {
+class SessionLocaleResolverTests {
+
+	private MockHttpServletRequest request = new MockHttpServletRequest();
+
+	private MockHttpServletResponse response = new MockHttpServletResponse();
+
+	private SessionLocaleResolver resolver = new SessionLocaleResolver();
+
 
 	@Test
-	public void testResolveLocale() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void resolveLocale() {
 		request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME, Locale.GERMAN);
 
-		SessionLocaleResolver resolver = new SessionLocaleResolver();
 		assertThat(resolver.resolveLocale(request)).isEqualTo(Locale.GERMAN);
 	}
 
 	@Test
-	public void testSetAndResolveLocale() {
-		MockHttpServletRequest request = new MockHttpServletRequest();
-		MockHttpServletResponse response = new MockHttpServletResponse();
-
-		SessionLocaleResolver resolver = new SessionLocaleResolver();
+	void setAndResolveLocale() {
 		resolver.setLocale(request, response, Locale.GERMAN);
 		assertThat(resolver.resolveLocale(request)).isEqualTo(Locale.GERMAN);
 
@@ -59,34 +63,26 @@ public class SessionLocaleResolverTests {
 	}
 
 	@Test
-	public void testResolveLocaleWithoutSession() throws Exception {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void resolveLocaleWithoutSession() throws Exception {
 		request.addPreferredLocale(Locale.TAIWAN);
 
-		SessionLocaleResolver resolver = new SessionLocaleResolver();
-
 		assertThat(resolver.resolveLocale(request)).isEqualTo(request.getLocale());
 	}
 
 	@Test
-	public void testResolveLocaleWithoutSessionAndDefaultLocale() throws Exception {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void resolveLocaleWithoutSessionAndDefaultLocale() throws Exception {
 		request.addPreferredLocale(Locale.TAIWAN);
 
-		SessionLocaleResolver resolver = new SessionLocaleResolver();
 		resolver.setDefaultLocale(Locale.GERMAN);
 
 		assertThat(resolver.resolveLocale(request)).isEqualTo(Locale.GERMAN);
 	}
 
 	@Test
-	public void testSetLocaleToNullLocale() throws Exception {
-		MockHttpServletRequest request = new MockHttpServletRequest();
+	void setLocaleToNullLocale() throws Exception {
 		request.addPreferredLocale(Locale.TAIWAN);
 		request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME, Locale.GERMAN);
-		MockHttpServletResponse response = new MockHttpServletResponse();
 
-		SessionLocaleResolver resolver = new SessionLocaleResolver();
 		resolver.setLocale(request, response, null);
 		Locale locale = (Locale) request.getSession().getAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME);
 		assertThat(locale).isNull();