Add tests to fail if gRPC trailers are present

Author: sakthivelmanii

google-cloud-spanner/src/test/java/com/google/cloud/spanner/ITTransactionRetryTest.java

@@ -18,8 +18,10 @@
 
 import static com.google.cloud.spanner.testing.EmulatorSpannerHelper.isUsingEmulator;
 import static com.google.common.truth.Truth.assertThat;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assume.assumeFalse;
+import static org.junit.Assume.assumeTrue;
 
 import org.junit.ClassRule;
 import org.junit.Test;
@@ -84,4 +86,56 @@ public void TestRetryInfo() {
 
     assertTrue("Transaction is not aborted with the trailers", isAbortedWithRetryInfo);
   }
+
+  @Test
+  public void TestRetryInfoWithDirectPath() {
+    assumeFalse("emulator does not support parallel transaction", isUsingEmulator());
+    // TODO(sakthivelmani) - Re-enable once b/422916293 is resolved
+    assumeTrue(
+        "Enabling this test due to bug b/422916293",
+        env.getTestHelper().getOptions().isEnableDirectAccess());
+
+    // Creating a database with the table which contains INT64 columns
+    Database db =
+        env.getTestHelper()
+            .createTestDatabase("CREATE TABLE Test(ID INT64, " + "EMPID INT64) PRIMARY KEY (ID)");
+    DatabaseClient databaseClient = env.getTestHelper().getClient().getDatabaseClient(db.getId());
+
+    // Inserting one row
+    databaseClient
+        .readWriteTransaction()
+        .run(
+            transaction -> {
+              transaction.buffer(
+                  Mutation.newInsertBuilder("Test").set("ID").to(1).set("EMPID").to(1).build());
+              return null;
+            });
+
+    int numRetries = 10;
+    boolean isAbortedWithRetryInfo = false;
+    while (numRetries-- > 0) {
+      try (TransactionManager transactionManager1 = databaseClient.transactionManager()) {
+        try (TransactionManager transactionManager2 = databaseClient.transactionManager()) {
+          try {
+            TransactionContext transaction1 = transactionManager1.begin();
+            TransactionContext transaction2 = transactionManager2.begin();
+            transaction1.executeUpdate(
+                Statement.of("UPDATE Test SET EMPID = EMPID + 1 WHERE ID = 1"));
+            transaction2.executeUpdate(
+                Statement.of("UPDATE Test SET EMPID = EMPID + 1 WHERE ID = 1"));
+            transactionManager1.commit();
+            transactionManager2.commit();
+          } catch (AbortedException abortedException) {
+            assertThat(abortedException.getErrorCode()).isEqualTo(ErrorCode.ABORTED);
+            if (abortedException.getRetryDelayInMillis() > 0) {
+              isAbortedWithRetryInfo = true;
+              break;
+            }
+          }
+        }
+      }
+    }
+
+    assertFalse("Transaction is aborted with the trailers", isAbortedWithRetryInfo);
+  }
 }