test(spanner): fix BackupTest timeout and PgQueryTest schema collision

Author: cy-yun

Spanner/tests/System/BackupTest.php

@@ -324,7 +324,19 @@ public function testCreateBackupCopy()
         $this->assertArrayHasKey('progressPercent', $metadata['progress']);
         $this->assertArrayHasKey('startTime', $metadata['progress']);
 
-        $op->pollUntilComplete();
+        $timeout = time() + self::LONG_TIMEOUT_SECONDS;
+        while (time() < $timeout) {
+            try {
+                $op->pollUntilComplete([
+                    'maxPollingDurationSeconds' => $timeout - time()
+                ]);
+                break;
+            } catch (\Google\ApiCore\ApiException $e) {
+                if ($e->getStatus() !== 'DEADLINE_EXCEEDED') {
+                    throw $e;
+                }
+            }
+        }
 
         self::$deletionQueue->add(function () use ($newBackup) {
             $newBackup->delete();

Spanner/tests/System/PgQueryTest.php

@@ -41,7 +41,7 @@ class PgQueryTest extends SystemTestCase
 {
     use PgSystemTestCaseTrait;
 
-    const TABLE_NAME = 'PgQueryTest';
+    const TABLE_NAME = 'PgQueryTest_2';
 
     public static $timestampVal;
 

Spanner/tests/System/PgSystemTestCaseTrait.php

@@ -126,7 +126,7 @@ protected static function setUpTestDatabase(): void
                     boolField BOOL,
                     PRIMARY KEY (id)
                 )',
-                'CREATE TABLE IF NOT EXISTS PgQueryTest (
+                'CREATE TABLE IF NOT EXISTS PgQueryTest_2 (
                     id bigint NOT NULL,
                     name varchar(1024),
                     registered bool,