Polish Base64 usages

See gh-17459

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-actuator-log4j2/src/test/java/smoketest/actuator/log4j2/SampleActuatorLog4J2ApplicationTests.java

@@ -31,7 +31,6 @@ import org.springframework.boot.test.system.OutputCaptureExtension;
 import org.springframework.test.web.servlet.MockMvc;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.hamcrest.Matchers.equalTo;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
@@ -61,12 +60,12 @@ class SampleActuatorLog4J2ApplicationTests {
 	@Test
 	void validateLoggersEndpoint() throws Exception {
 		this.mvc.perform(get("/actuator/loggers/org.apache.coyote.http11.Http11NioProtocol").header("Authorization",
-				"Basic " + getBasicAuth())).andExpect(status().isOk()).andExpect(
-						content().string(equalTo("{\"configuredLevel\":\"WARN\"," + "\"effectiveLevel\":\"WARN\"}")));
+				getBasicAuth())).andExpect(status().isOk())
+				.andExpect(content().string("{\"configuredLevel\":\"WARN\"," + "\"effectiveLevel\":\"WARN\"}"));
 	}
 
 	private String getBasicAuth() {
-		return new String(Base64.getEncoder().encode(("user:password").getBytes()));
+		return "Basic " + Base64.getEncoder().encodeToString("user:password".getBytes());
 	}
 
 }

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-secure-webflux/src/test/java/smoketest/secure/webflux/ManagementPortSampleSecureWebFluxTests.java

@@ -56,9 +56,8 @@ class ManagementPortSampleSecureWebFluxTests {
 
 	@Test
 	void testHome() {
-		this.webClient.get().uri("http://localhost:" + this.port, String.class)
-				.header("Authorization", "basic " + getBasicAuth()).exchange().expectStatus().isOk()
-				.expectBody(String.class).isEqualTo("Hello user");
+		this.webClient.get().uri("http://localhost:" + this.port, String.class).header("Authorization", getBasicAuth())
+				.exchange().expectStatus().isOk().expectBody(String.class).isEqualTo("Hello user");
 	}
 
 	@Test
@@ -84,7 +83,7 @@ class ManagementPortSampleSecureWebFluxTests {
 	}
 
 	private String getBasicAuth() {
-		return new String(Base64.getEncoder().encode(("user:password").getBytes()));
+		return "Basic " + Base64.getEncoder().encodeToString("user:password".getBytes());
 	}
 
 	@Configuration(proxyBeanMethods = false)

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-secure-webflux/src/test/java/smoketest/secure/webflux/SampleSecureWebFluxApplicationTests.java

@@ -63,20 +63,19 @@ class SampleSecureWebFluxApplicationTests {
 
 	@Test
 	void userDefinedMappingsAccessibleOnLogin() {
-		this.webClient.get().uri("/").accept(MediaType.APPLICATION_JSON)
-				.header("Authorization", "basic " + getBasicAuth()).exchange().expectBody(String.class)
-				.isEqualTo("Hello user");
+		this.webClient.get().uri("/").accept(MediaType.APPLICATION_JSON).header("Authorization", getBasicAuth())
+				.exchange().expectBody(String.class).isEqualTo("Hello user");
 	}
 
 	@Test
 	void actuatorsAccessibleOnLogin() {
 		this.webClient.get().uri("/actuator/health").accept(MediaType.APPLICATION_JSON)
-				.header("Authorization", "basic " + getBasicAuth()).exchange().expectBody(String.class)
+				.header("Authorization", getBasicAuth()).exchange().expectBody(String.class)
 				.isEqualTo("{\"status\":\"UP\"}");
 	}
 
 	private String getBasicAuth() {
-		return new String(Base64.getEncoder().encode(("user:password").getBytes()));
+		return "Basic " + Base64.getEncoder().encodeToString("user:password".getBytes());
 	}
 
 }

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-secure-webflux/src/test/java/smoketest/secure/webflux/SampleSecureWebFluxCustomSecurityTests.java

@@ -63,19 +63,19 @@ class SampleSecureWebFluxCustomSecurityTests {
 	@Test
 	void actuatorsSecuredByRole() {
 		this.webClient.get().uri("/actuator/env").accept(MediaType.APPLICATION_JSON)
-				.header("Authorization", "basic " + getBasicAuth()).exchange().expectStatus().isForbidden();
+				.header("Authorization", getBasicAuth()).exchange().expectStatus().isForbidden();
 	}
 
 	@Test
 	void actuatorsAccessibleOnCorrectLogin() {
 		this.webClient.get().uri("/actuator/env").accept(MediaType.APPLICATION_JSON)
-				.header("Authorization", "basic " + getBasicAuthForAdmin()).exchange().expectStatus().isOk();
+				.header("Authorization", getBasicAuthForAdmin()).exchange().expectStatus().isOk();
 	}
 
 	@Test
 	void actuatorExcludedFromEndpointRequestMatcher() {
 		this.webClient.get().uri("/actuator/mappings").accept(MediaType.APPLICATION_JSON)
-				.header("Authorization", "basic " + getBasicAuth()).exchange().expectStatus().isOk();
+				.header("Authorization", getBasicAuth()).exchange().expectStatus().isOk();
 	}
 
 	@Test
@@ -89,15 +89,15 @@ class SampleSecureWebFluxCustomSecurityTests {
 		this.webClient.get().uri("/actuator").accept(MediaType.APPLICATION_JSON).exchange().expectStatus()
 				.isUnauthorized();
 		this.webClient.get().uri("/actuator").accept(MediaType.APPLICATION_JSON)
-				.header("Authorization", "basic " + getBasicAuthForAdmin()).exchange().expectStatus().isOk();
+				.header("Authorization", getBasicAuthForAdmin()).exchange().expectStatus().isOk();
 	}
 
 	private String getBasicAuth() {
-		return new String(Base64.getEncoder().encode(("user:password").getBytes()));
+		return "Basic " + Base64.getEncoder().encodeToString("user:password".getBytes());
 	}
 
 	private String getBasicAuthForAdmin() {
-		return new String(Base64.getEncoder().encode(("admin:admin").getBytes()));
+		return "Basic " + Base64.getEncoder().encodeToString("admin:admin".getBytes());
 	}
 
 	@Configuration(proxyBeanMethods = false)

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-session/src/test/java/smoketest/session/SampleSessionApplicationTests.java

@@ -65,7 +65,7 @@ class SampleSessionApplicationTests {
 
 	private ResponseEntity<String> firstRequest(RestTemplate restTemplate, URI uri) {
 		HttpHeaders headers = new HttpHeaders();
-		headers.set("Authorization", "Basic " + Base64.getEncoder().encodeToString("user:password".getBytes()));
+		headers.set("Authorization", getBasicAuth());
 		RequestEntity<Object> request = new RequestEntity<>(headers, HttpMethod.GET, uri);
 		return restTemplate.exchange(request, String.class);
 	}
@@ -77,4 +77,8 @@ class SampleSessionApplicationTests {
 		return restTemplate.exchange(request, String.class);
 	}
 
+	private String getBasicAuth() {
+		return "Basic " + Base64.getEncoder().encodeToString("user:password".getBytes());
+	}
+
 }