Add DatastoreEmulatorContainer to gcloud module

docs/modules/gcloud.md

@@ -8,16 +8,16 @@ Testcontainers module for the Google Cloud Platform's [Cloud SDK](https://cloud.
 npm install @testcontainers/gcloud --save-dev
 ```
 
+Currently, the module supports `Firestore` emulators in Native mode and Datastore mode. In order to use them, you should use the following classes:
 
-Currently, the module supports `Firestore` emulators. In order to use it, you should use the following classes:
-
-Class | Container Image
--|-
-FirestoreEmulatorContainer | [gcr.io/google.com/cloudsdktool/google-cloud-cli:emulators](https://gcr.io/google.com/cloudsdktool/google-cloud-cli)
+Mode | Class | Container Image
+-|-|-
+Native mode | FirestoreEmulatorContainer | [gcr.io/google.com/cloudsdktool/google-cloud-cli:emulators](https://gcr.io/google.com/cloudsdktool/google-cloud-cli)
+Datastore mode | DatastoreEmulatorContainer | [gcr.io/google.com/cloudsdktool/google-cloud-cli:emulators](https://gcr.io/google.com/cloudsdktool/google-cloud-cli)
 
 ## Examples
 
-### Firestore
+### Firestore Native mode
 
 <!--codeinclude-->
 [Starting a Firestore Emulator container with the default image](../../packages/modules/gcloud/src/firestore-emulator-container.test.ts) inside_block:firestore4
@@ -26,3 +26,13 @@ FirestoreEmulatorContainer | [gcr.io/google.com/cloudsdktool/google-cloud-cli:em
 <!--codeinclude-->
 [Starting a Firestore Emulator container with a custom emulator image](../../packages/modules/gcloud/src/firestore-emulator-container.test.ts) inside_block:firestore5
 <!--/codeinclude-->
+
+### Firestore Datastore mode
+
+<!--codeinclude-->
+[Starting a Datastore Emulator container with the default image](../../packages/modules/gcloud/src/datastore-emulator-container.test.ts) inside_block:datastore4
+<!--/codeinclude-->
+
+<!--codeinclude-->
+[Starting a Datastore Emulator container with a custom emulator image](../../packages/modules/gcloud/src/datastore-emulator-container.test.ts) inside_block:datastore5
+<!--/codeinclude-->

packages/modules/gcloud/package.json

@@ -34,6 +34,7 @@
     "testcontainers": "^10.10.4"
   },
   "devDependencies": {
+    "@google-cloud/datastore": "^9.0.0",
     "@google-cloud/firestore": "7.9.0",
     "firebase-admin": "12.2.0"
   }

packages/modules/gcloud/src/datastore-emulator-container.test.ts

@@ -0,0 +1,45 @@
+import { DatastoreEmulatorContainer, StartedDatastoreEmulatorContainer } from "./datastore-emulator-container";
+import { Datastore } from "@google-cloud/datastore";
+
+describe("DatastoreEmulatorContainer", () => {
+  jest.setTimeout(240_000);
+
+  // datastore4 {
+  it("should work using default version", async () => {
+    const datastoreEmulatorContainer = await new DatastoreEmulatorContainer().start();
+
+    await checkDatastore(datastoreEmulatorContainer);
+
+    await datastoreEmulatorContainer.stop();
+  });
+  // }
+
+  // datastore5 {
+  it("should work using version 468.0.0", async () => {
+    const datastoreEmulatorContainer = await new DatastoreEmulatorContainer(
+      "gcr.io/google.com/cloudsdktool/google-cloud-cli:468.0.0-emulators"
+    ).start();
+
+    await checkDatastore(datastoreEmulatorContainer);
+
+    await datastoreEmulatorContainer.stop();
+  });
+
+  // }
+
+  async function checkDatastore(datastoreEmulatorContainer: StartedDatastoreEmulatorContainer) {
+    expect(datastoreEmulatorContainer).toBeDefined();
+    const testProjectId = "test-project";
+    const testKind = "test-kind";
+    const testId = "123";
+    const databaseConfig = { projectId: testProjectId, apiEndpoint: datastoreEmulatorContainer.getEmulatorEndpoint() };
+    const datastore = new Datastore(databaseConfig);
+
+    const key = datastore.key([testKind, testId]);
+    const data = { message: "Hello, Datastore!" };
+    await datastore.save({ key, data });
+    const [entity] = await datastore.get(key);
+
+    expect(entity).toEqual({ message: "Hello, Datastore!", [Datastore.KEY]: key });
+  }
+});

packages/modules/gcloud/src/datastore-emulator-container.ts

@@ -0,0 +1,33 @@
+import { AbstractStartedContainer, GenericContainer, StartedTestContainer, Wait } from "testcontainers";
+
+const EMULATOR_PORT = 8080;
+const CMD = `gcloud beta emulators firestore start --host-port 0.0.0.0:${EMULATOR_PORT} --database-mode=datastore-mode`;
+const DEFAULT_IMAGE = "gcr.io/google.com/cloudsdktool/cloud-sdk";
+
+export class DatastoreEmulatorContainer extends GenericContainer {
+  constructor(image = DEFAULT_IMAGE) {
+    super(image);
+    this.withExposedPorts(EMULATOR_PORT)
+      .withCommand(["/bin/sh", "-c", CMD])
+      .withWaitStrategy(Wait.forLogMessage(RegExp(".*running.*"), 1))
+      .withStartupTimeout(120_000);
+  }
+
+  public override async start(): Promise<StartedDatastoreEmulatorContainer> {
+    return new StartedDatastoreEmulatorContainer(await super.start());
+  }
+}
+
+export class StartedDatastoreEmulatorContainer extends AbstractStartedContainer {
+  constructor(startedTestContainer: StartedTestContainer) {
+    super(startedTestContainer);
+  }
+
+  /**
+   * @return a <code>host:port</code> pair corresponding to the address on which the emulator is
+   * reachable from the test host machine.
+   */
+  public getEmulatorEndpoint(): string {
+    return `${this.getHost()}:${this.getMappedPort(EMULATOR_PORT)}`;
+  }
+}