chore: add integration tests in main test file for the samples

samples/schema.js

@@ -37,19 +37,20 @@ async function createDatabase(instanceID, databaseID, projectID) {
   const databaseAdminClient = spanner.getDatabaseAdminClient();
 
   const createSingersTableStatement = `
-    CREATE TABLE Singers (
-        SingerId   INT64 NOT NULL,
-        FirstName  STRING(1024),
-        LastName   STRING(1024),
-        SingerInfo BYTES(MAX)
-    ) PRIMARY KEY (SingerId)`;
+  CREATE TABLE Singers (
+    SingerId    INT64 NOT NULL,
+    FirstName   STRING(1024),
+    LastName    STRING(1024),
+    SingerInfo  BYTES(MAX),
+    FullName    STRING(2048) AS (ARRAY_TO_STRING([FirstName, LastName], " ")) STORED,
+  ) PRIMARY KEY (SingerId)`;
   const createAlbumsTableStatement = `
-    CREATE TABLE Albums (
-        SingerId     INT64 NOT NULL,
-        AlbumId      INT64 NOT NULL,
-        AlbumTitle   STRING(MAX)
-    ) PRIMARY KEY (SingerId, AlbumId),
-        INTERLEAVE IN PARENT Singers ON DELETE CASCADE`;
+  CREATE TABLE Albums (
+    SingerId    INT64 NOT NULL,
+    AlbumId     INT64 NOT NULL,
+    AlbumTitle  STRING(MAX)
+  ) PRIMARY KEY (SingerId, AlbumId),
+  INTERLEAVE IN PARENT Singers ON DELETE CASCADE`;
 
   // Creates a new database
   try {