Merge pull request #27819 from jdubois

* pr/27819:
  Polish "Use more precise variables to detect Azure App Service"
  Use more precise variables to detect Azure App Service

Closes gh-27819

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/cloud/CloudPlatform.java

@@ -16,6 +16,9 @@
 
 package org.springframework.boot.cloud;
 
+import java.util.Arrays;
+import java.util.List;
+
 import org.springframework.boot.context.properties.bind.Binder;
 import org.springframework.core.env.ConfigurableEnvironment;
 import org.springframework.core.env.EnumerablePropertySource;
@@ -138,14 +141,12 @@ public enum CloudPlatform {
 	 */
 	AZURE_APP_SERVICE {
 
-		private static final String WEBSITE_SITE_NAME = "WEBSITE_SITE_NAME";
-
-		private static final String WEBSITES_ENABLE_APP_SERVICE_STORAGE = "WEBSITES_ENABLE_APP_SERVICE_STORAGE";
+		private final List<String> azureEnvVariables = Arrays.asList("WEBSITE_SITE_NAME", "WEBSITE_INSTANCE_ID",
+				"WEBSITE_RESOURCE_GROUP", "WEBSITE_SKU");
 
 		@Override
 		public boolean isDetected(Environment environment) {
-			return environment.containsProperty(WEBSITE_SITE_NAME)
-					&& environment.containsProperty(WEBSITES_ENABLE_APP_SERVICE_STORAGE);
+			return this.azureEnvVariables.stream().allMatch(environment::containsProperty);
 		}
 
 	};

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/cloud/CloudPlatformTests.java

@@ -133,10 +133,12 @@ class CloudPlatformTests {
 	}
 
 	@Test
-	void getActiveWhenHasWebsiteSiteNameAndWebsitesEnableAppServiceStorageShouldReturnAzureAppService() {
+	void getActiveWhenHasAllAzureEnvVariablesShouldReturnAzureAppService() {
 		Map<String, Object> envVars = new HashMap<>();
 		envVars.put("WEBSITE_SITE_NAME", "---");
-		envVars.put("WEBSITES_ENABLE_APP_SERVICE_STORAGE", "false");
+		envVars.put("WEBSITE_INSTANCE_ID", "1234");
+		envVars.put("WEBSITE_RESOURCE_GROUP", "test");
+		envVars.put("WEBSITE_SKU", "1234");
 		Environment environment = getEnvironmentWithEnvVariables(envVars);
 		CloudPlatform platform = CloudPlatform.getActive(environment);
 		assertThat(platform).isEqualTo(CloudPlatform.AZURE_APP_SERVICE);
@@ -144,16 +146,45 @@ class CloudPlatformTests {
 	}
 
 	@Test
-	void getActiveWhenHasWebsiteSiteNameAndNoWebsitesEnableAppServiceStorageShouldNotReturnAzureAppService() {
-		Environment environment = getEnvironmentWithEnvVariables(Collections.singletonMap("WEBSITE_SITE_NAME", "---"));
+	void getActiveWhenHasMissingWebsiteSiteNameShouldNotReturnAzureAppService() {
+		Map<String, Object> envVars = new HashMap<>();
+		envVars.put("WEBSITE_INSTANCE_ID", "1234");
+		envVars.put("WEBSITE_RESOURCE_GROUP", "test");
+		envVars.put("WEBSITE_SKU", "1234");
+		Environment environment = getEnvironmentWithEnvVariables(envVars);
 		CloudPlatform platform = CloudPlatform.getActive(environment);
 		assertThat(platform).isNull();
 	}
 
 	@Test
-	void getActiveWhenHasWebsitesEnableAppServiceStorageAndNoWebsiteSiteNameShouldNotReturnAzureAppService() {
-		Environment environment = getEnvironmentWithEnvVariables(
-				Collections.singletonMap("WEBSITES_ENABLE_APP_SERVICE_STORAGE", "false"));
+	void getActiveWhenHasMissingWebsiteInstanceIdShouldNotReturnAzureAppService() {
+		Map<String, Object> envVars = new HashMap<>();
+		envVars.put("WEBSITE_SITE_NAME", "---");
+		envVars.put("WEBSITE_RESOURCE_GROUP", "test");
+		envVars.put("WEBSITE_SKU", "1234");
+		Environment environment = getEnvironmentWithEnvVariables(envVars);
+		CloudPlatform platform = CloudPlatform.getActive(environment);
+		assertThat(platform).isNull();
+	}
+
+	@Test
+	void getActiveWhenHasMissingWebsiteResourceGroupShouldNotReturnAzureAppService() {
+		Map<String, Object> envVars = new HashMap<>();
+		envVars.put("WEBSITE_SITE_NAME", "---");
+		envVars.put("WEBSITE_INSTANCE_ID", "1234");
+		envVars.put("WEBSITE_SKU", "1234");
+		Environment environment = getEnvironmentWithEnvVariables(envVars);
+		CloudPlatform platform = CloudPlatform.getActive(environment);
+		assertThat(platform).isNull();
+	}
+
+	@Test
+	void getActiveWhenHasMissingWebsiteSkuShouldNotReturnAzureAppService() {
+		Map<String, Object> envVars = new HashMap<>();
+		envVars.put("WEBSITE_SITE_NAME", "---");
+		envVars.put("WEBSITE_INSTANCE_ID", "1234");
+		envVars.put("WEBSITE_RESOURCE_GROUP", "test");
+		Environment environment = getEnvironmentWithEnvVariables(envVars);
 		CloudPlatform platform = CloudPlatform.getActive(environment);
 		assertThat(platform).isNull();
 	}