Add graceful test skipping when required environment variables are not set

- Updated ContentUnderstandingClientTestBase to include skipIfRequiredEnvironmentVariablesNotSet() utility method
- Added @beforeeach method to all 17 Sample test classes
- Tests now skip (instead of failing with NullPointerException) when CONTENTUNDERSTANDING_ENDPOINT or AZURE_CONTENT_UNDERSTANDING_KEY are not available
- This allows Azure DevOps pipeline to run without test credential setup

Author: Changjian Wang

sdk/contentunderstanding/azure-ai-contentunderstanding/src/test/java/com/azure/ai/contentunderstanding/generated/ContentUnderstandingClientTestBase.java

@@ -17,10 +17,27 @@
 import com.azure.core.test.utils.MockTokenCredential;
 import com.azure.core.util.Configuration;
 import com.azure.identity.DefaultAzureCredentialBuilder;
+import org.junit.jupiter.api.BeforeEach;
+import org.opentest4j.TestAbortedException;
 
 class ContentUnderstandingClientTestBase extends TestProxyTestBase {
     protected ContentUnderstandingClient contentUnderstandingClient;
 
+    /**
+     * Utility method to check if required environment variables are available.
+     * If they are not available, the test will be skipped.
+     * This is useful for integration tests that require real Azure credentials.
+     */
+    protected static void skipIfRequiredEnvironmentVariablesNotSet() {
+        String endpoint = Configuration.getGlobalConfiguration().get("CONTENTUNDERSTANDING_ENDPOINT");
+        String key = System.getenv("AZURE_CONTENT_UNDERSTANDING_KEY");
+
+        if ((endpoint == null || endpoint.trim().isEmpty()) && (key == null || key.trim().isEmpty())) {
+            throw new TestAbortedException(
+                "Required environment variables CONTENTUNDERSTANDING_ENDPOINT or AZURE_CONTENT_UNDERSTANDING_KEY are not set. Skipping test.");
+        }
+    }
+
     @Override
     protected void beforeTest() {
         ContentUnderstandingClientBuilder contentUnderstandingClientbuilder = new ContentUnderstandingClientBuilder()

sdk/contentunderstanding/azure-ai-contentunderstanding/src/test/java/com/azure/ai/contentunderstanding/generated/Sample00_ConfigureDefaultsTest.java

@@ -13,6 +13,7 @@
 import com.azure.core.util.BinaryData;
 import com.azure.core.util.Configuration;
 import com.azure.identity.DefaultAzureCredentialBuilder;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -26,6 +27,11 @@
  */
 public class Sample00_ConfigureDefaultsTest {
 
+    @BeforeEach
+    public void setUp() {
+        ContentUnderstandingClientTestBase.skipIfRequiredEnvironmentVariablesNotSet();
+    }
+
     @Test
     public void testConfigureDefaults() {
         // BEGIN: com.azure.ai.contentunderstanding.buildClient

sdk/contentunderstanding/azure-ai-contentunderstanding/src/test/java/com/azure/ai/contentunderstanding/generated/Sample01_AnalyzeBinaryTest.java

@@ -19,6 +19,7 @@
 import com.azure.core.util.polling.SyncPoller;
 import com.azure.identity.DefaultAzureCredentialBuilder;
 import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -41,6 +42,11 @@
  */
 public class Sample01_AnalyzeBinaryTest {
 
+    @BeforeEach
+    public void setUp() {
+        ContentUnderstandingClientTestBase.skipIfRequiredEnvironmentVariablesNotSet();
+    }
+
     @Test
     public void testAnalyzeBinaryAsync() throws IOException {
         // BEGIN: com.azure.ai.contentunderstanding.buildClient

sdk/contentunderstanding/azure-ai-contentunderstanding/src/test/java/com/azure/ai/contentunderstanding/generated/Sample02_AnalyzeUrlTest.java

@@ -19,6 +19,7 @@
 import com.azure.core.util.polling.SyncPoller;
 import com.azure.identity.DefaultAzureCredentialBuilder;
 import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -37,6 +38,11 @@
  */
 public class Sample02_AnalyzeUrlTest {
 
+    @BeforeEach
+    public void setUp() {
+        ContentUnderstandingClientTestBase.skipIfRequiredEnvironmentVariablesNotSet();
+    }
+
     @Test
     public void testAnalyzeUrlAsync() {
         // BEGIN: com.azure.ai.contentunderstanding.buildClient

sdk/contentunderstanding/azure-ai-contentunderstanding/src/test/java/com/azure/ai/contentunderstanding/generated/Sample03_AnalyzeInvoiceTest.java

@@ -22,6 +22,7 @@
 import com.azure.core.util.polling.SyncPoller;
 import com.azure.identity.DefaultAzureCredentialBuilder;
 import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -40,6 +41,11 @@
  */
 public class Sample03_AnalyzeInvoiceTest {
 
+    @BeforeEach
+    public void setUp() {
+        ContentUnderstandingClientTestBase.skipIfRequiredEnvironmentVariablesNotSet();
+    }
+
     @Test
     public void testAnalyzeInvoiceAsync() {
         // BEGIN: com.azure.ai.contentunderstanding.buildClient

sdk/contentunderstanding/azure-ai-contentunderstanding/src/test/java/com/azure/ai/contentunderstanding/generated/Sample04_CreateAnalyzerTest.java

@@ -28,6 +28,7 @@
 import com.azure.identity.DefaultAzureCredentialBuilder;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -48,6 +49,11 @@
  */
 public class Sample04_CreateAnalyzerTest {
 
+    @BeforeEach
+    public void setUp() {
+        ContentUnderstandingClientTestBase.skipIfRequiredEnvironmentVariablesNotSet();
+    }
+
     private String createdAnalyzerId;
 
     @AfterEach

sdk/contentunderstanding/azure-ai-contentunderstanding/src/test/java/com/azure/ai/contentunderstanding/generated/Sample05_CreateClassifierTest.java

@@ -19,6 +19,7 @@
 import com.azure.identity.DefaultAzureCredentialBuilder;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -36,6 +37,11 @@
  */
 public class Sample05_CreateClassifierTest {
 
+    @BeforeEach
+    public void setUp() {
+        ContentUnderstandingClientTestBase.skipIfRequiredEnvironmentVariablesNotSet();
+    }
+
     private String createdAnalyzerId;
 
     @AfterEach

sdk/contentunderstanding/azure-ai-contentunderstanding/src/test/java/com/azure/ai/contentunderstanding/generated/Sample06_GetAnalyzerTest.java

@@ -11,6 +11,7 @@
 import com.azure.core.util.Configuration;
 import com.azure.identity.DefaultAzureCredentialBuilder;
 import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -25,6 +26,11 @@
  */
 public class Sample06_GetAnalyzerTest {
 
+    @BeforeEach
+    public void setUp() {
+        ContentUnderstandingClientTestBase.skipIfRequiredEnvironmentVariablesNotSet();
+    }
+
     @Test
     public void testGetAnalyzerAsync() {
         // BEGIN: com.azure.ai.contentunderstanding.buildClient

sdk/contentunderstanding/azure-ai-contentunderstanding/src/test/java/com/azure/ai/contentunderstanding/generated/Sample07_ListAnalyzersTest.java

@@ -12,6 +12,7 @@
 import com.azure.core.util.Configuration;
 import com.azure.identity.DefaultAzureCredentialBuilder;
 import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -26,6 +27,11 @@
  */
 public class Sample07_ListAnalyzersTest {
 
+    @BeforeEach
+    public void setUp() {
+        ContentUnderstandingClientTestBase.skipIfRequiredEnvironmentVariablesNotSet();
+    }
+
     @Test
     public void testListAnalyzersAsync() {
         // BEGIN: com.azure.ai.contentunderstanding.buildClient

sdk/contentunderstanding/azure-ai-contentunderstanding/src/test/java/com/azure/ai/contentunderstanding/generated/Sample09_DeleteAnalyzerTest.java

@@ -17,6 +17,7 @@
 import com.azure.core.util.Configuration;
 import com.azure.identity.DefaultAzureCredentialBuilder;
 import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -34,6 +35,11 @@
  */
 public class Sample09_DeleteAnalyzerTest {
 
+    @BeforeEach
+    public void setUp() {
+        ContentUnderstandingClientTestBase.skipIfRequiredEnvironmentVariablesNotSet();
+    }
+
     @Test
     public void testDeleteAnalyzerAsync() {
         // BEGIN: com.azure.ai.contentunderstanding.buildClient