- [Spanner] (#testing-code-that-uses-cloud-spanner)

Currently, there isn't an emulator for Cloud Spanner, so an alternative is to create a test project. `RemoteSpannerHelper` contains convenience methods to make setting up and cleaning up the test project easier. To use this class, follow the steps below:

1. Create a test Google Cloud project.

2. Download a JSON service account credentials file from the Google Developer's Console. See more about this on the [Google Cloud Platform Storage Authentication page][cloud-platform-storage-authentication].

3. Create or use an existing Cloud Spanner Instance.

4. Create a `RemoteSpannerHelper` object using your instance ID and

`SpannerOptions` pointing to the credentials file.

Here is an example that uses the `RemoteSpannerHelper` to create a database.

```java

SpannerOptions options = SpannerOptions.newBuilder()

.setCredentials(GoogleCredentials.fromStream(new FileInputStream("/path/to/my/JSON/key.json")))

.build()

RemoteSpannerHelper helper =

RemoteSpannerHelper.create(options, InstanceId.of(options.getProjectId(), INSTANCE_ID),

new FileInputStream("/path/to/my/JSON/key.json"));

Database db = RemoteSpannerHelper.createTestDatabase("my ddl statements"...);

DatabaseClient client = RemoteSpannerHelper.getDatabaseClient(db);

```

5. Run your tests.

6. Clean up the test project by using `cleanUp` to clear any databases created.

```java

RemoteSpannerHelper.cleanUp();

Java idiomatic client for [Cloud

Spanner](https://cloud.google.com/spanner).

[![Build

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- [Homepage](https://googlecloudplatform.github.io/google-cloud-java/)

- [API

Documentation](https://googlecloudplatform.github.io/google-cloud-java/apidocs/index.html?com/google/cloud/spanner/package-summary.html)

If you are using Maven, add this to your pom.xml file `xml <dependency>

<groupId>com.google.cloud</groupId>

<artifactId>google-cloud-spanner</artifactId> <version>0.8.2-beta</version>

</dependency>` If you are using Gradle, add this to your dependencies `Groovy

compile 'com.google.cloud:google-cloud-spanner:0.8.2-beta'` If you are using

SBT, add this to your dependencies `Scala libraryDependencies +=

"com.google.cloud" % "google-cloud-spanner" % "0.8.2-beta"`

See the

[Authentication](https://github.com/GoogleCloudPlatform/google-cloud-java#authentication)

section in the base directory's README.

[Cloud Spanner][cloud-spanner] is a fully managed, mission-critical relational database service

built from the ground up and battle tested for transactional consistency, high

availability, and global scale. With traditional relational semantics (schemas,

ACID transactions, SQL) and automatic, synchronous replication for high

availability, Cloud Spanner is the only database service of its kind on the

market.

Be sure to activate the Cloud Spanner API on the Developer's Console to

use Cloud Spanner from your project.

See the `google-cloud` API [spanner documentation][spanner-api] to learn how to

interact with Cloud Spanner using this Client Library.

Please refer to the [getting

started](https://cloud.google.com/spanner/docs/getting-started/java/) guide.

To get help, follow the instructions in the [shared Troubleshooting

document](https://github.com/GoogleCloudPlatform/gcloud-common/blob/master/troubleshooting/readme.md#troubleshooting).

Java 7 or above is required for using this client.

This library has tools to help make tests for code using Cloud Spanner.

See [TESTING] to read more about testing.

This library follows [Semantic Versioning](http://semver.org/).

It is currently in major version zero (`0.y.z`), which means that anything may

change at any time and the public API should not be considered stable.

Contributions to this library are always welcome and highly encouraged.

See [CONTRIBUTING] for more information on how to get started.

Apache 2.0 - See [LICENSE] for more information.

[CONTRIBUTING]:https://github.com/GoogleCloudPlatform/google-cloud-java/blob/master/CONTRIBUTING.md

[LICENSE]: https://github.com/GoogleCloudPlatform/google-cloud-java/blob/master/LICENSE

[TESTING]: https://github.com/GoogleCloudPlatform/google-cloud-java/blob/master/TESTING.md#testing-code-that-uses-cloud-spanner

[cloud-platform]: https://cloud.google.com/

[cloud-spanner]: https://cloud.google.com/spanner/

[spanner-api]: https://googlecloudplatform.github.io/google-cloud-java/apidocs/index.html?com/google/cloud/spanner/package-summary.html