feat(spanner): add samples for creating instances with processing units (GoogleCloudPlatform#1441)

Author: hengfengli

spanner/src/create_instance_with_processing_units.php

@@ -0,0 +1,69 @@
+
+/**
+ * Copyright 2021 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * For instructions on how to run the full sample:
+ *
+ * @see https://github.com/GoogleCloudPlatform/php-docs-samples/tree/master/spanner/README.md
+ */
+
+namespace Google\Cloud\Samples\Spanner;
+
+// [START spanner_create_instance_with_processing_units]
+use Google\Cloud\Spanner\SpannerClient;
+
+/**
+ * Creates an instance.
+ * Example:
+ * ```
+ * create_instance_with_processing_units($instanceId);
+ * ```
+ *
+ * @param string $instanceId The Spanner instance ID.
+ */
+function create_instance_with_processing_units(string $instanceId): void
+{
+    $spanner = new SpannerClient();
+    $instanceConfig = $spanner->instanceConfiguration(
+        'regional-us-central1'
+    );
+    $operation = $spanner->createInstance(
+        $instanceConfig,
+        $instanceId,
+        [
+            'displayName' => 'This is a display name.',
+            'processingUnits' => 500,
+            'labels' => [
+                'cloud_spanner_samples' => true,
+            ]
+        ]
+    );
+
+    print('Waiting for operation to complete...' . PHP_EOL);
+    $operation->pollUntilComplete();
+
+    printf('Created instance %s' . PHP_EOL, $instanceId);
+
+    $instance = $spanner->instance($instanceId);
+    $info = $instance->info(['processingUnits']);
+    printf('Instance %s has %d processing units.' . PHP_EOL, $instanceId, $info['processingUnits']);
+}
+// [END spanner_create_instance_with_processing_units]
+
+// The following 2 lines are only needed to run the samples
+require_once __DIR__ . '/../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);

spanner/test/spannerTest.php

@@ -36,6 +36,9 @@ class spannerTest extends TestCase
     /** @var string instanceId */
     protected static $instanceId;
 
+    /** @var string lowCostInstanceId */
+    protected static $lowCostInstanceId;
+
     /** @var string databaseId */
     protected static $databaseId;
 
@@ -45,6 +48,13 @@ class spannerTest extends TestCase
     /** @var $instance Instance */
     protected static $instance;
 
+    /**
+     * Low cost instance with less than 1000 processing units.
+     *
+     * @var $instance lowCostInstance
+     */
+    protected static $lowCostInstance;
+
     /** @var $lastUpdateData int */
     protected static $lastUpdateDataTimestamp;
 
@@ -61,9 +71,11 @@ public static function setUpBeforeClass(): void
         ]);
 
         self::$instanceId = 'test-' . time() . rand();
+        self::$lowCostInstanceId = 'test-' . time() . rand();
         self::$databaseId = 'test-' . time() . rand();
         self::$backupId = 'backup-' . self::$databaseId;
         self::$instance = $spanner->instance(self::$instanceId);
+        self::$lowCostInstance = $spanner->instance(self::$lowCostInstanceId);
     }
 
     public function testCreateInstance()
@@ -75,6 +87,15 @@ public function testCreateInstance()
         $this->assertStringContainsString('Created instance test-', $output);
     }
 
+    public function testCreateInstanceWithProcessingUnits()
+    {
+        $output = $this->runFunctionSnippet('create_instance_with_processing_units', [
+            'instance_id' => self::$lowCostInstanceId
+        ]);
+        $this->assertStringContainsString('Waiting for operation to complete...', $output);
+        $this->assertStringContainsString('Created instance test-', $output);
+    }
+
     /**
      * @depends testCreateInstance
      */
@@ -699,5 +720,6 @@ public static function tearDownAfterClass(): void
             $database->drop();
         }
         self::$instance->delete();
+        self::$lowCostInstance->delete();
     }
 }