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Showcase Integration Testing

GAPIC Showcase is an API that demonstrates Generated API Client (GAPIC) features and common API patterns used by Google. It follows the Cloud APIs design guide. gapic-generator-java generates a client for the Showcase API which can communicate with a local Showcase server to perform integration tests.

Requirements

  • Install Go in your PATH.

Installing the Server

Using the latest version of showcase is recommended, but backward compatibility between server versions is not guaranteed. If changing the version of the server, it may also be necessary to update to a compatible client version in ./WORKSPACE.

# Install the showcase server version defined in gapic-showcase/pom.xml
cd showcase
go install github.com/googleapis/gapic-showcase/cmd/gapic-showcase@v"$(cd gapic-showcase;mvn help:evaluate -Dexpression=gapic-showcase.version -q -DforceStdout |sed 's/\x1b\[[0-9;]*m//g')"
PATH=$PATH:`go env GOPATH`/bin
gapic-showcase --help
> Root command of gapic-showcase
> 
> Usage:
>   gapic-showcase [command]
> 
> Available Commands:
>   completion  Emits bash a completion for gapic-showcase
>   compliance  This service is used to test that GAPICs...
>   echo        This service is used showcase the four main types...
>   help        Help about any command
>   identity    A simple identity service.
>   messaging   A simple messaging service that implements chat...
>   run         Runs the showcase server
>   sequence    Sub-command for Service: Sequence
>   testing     A service to facilitate running discrete sets of...
> 
> Flags:
>   -h, --help      help for gapic-showcase
>   -j, --json      Print JSON output
>   -v, --verbose   Print verbose output
>       --version   version for gapic-showcase

Running the Server

Run the showcase server to allow requests to be sent to it. This opens port :7469 to send and receive requests.

gapic-showcase run
> 2022/11/21 16:22:15 Showcase listening on port: :7469
> 2022/11/21 16:22:15 Starting endpoint 0: gRPC endpoint
> 2022/11/21 16:22:15 Starting endpoint 1: HTTP/REST endpoint
> 2022/11/21 16:22:15 Starting endpoint multiplexer
> 2022/11/21 16:22:15 Listening for gRPC-fallback connections
> 2022/11/21 16:22:15 Listening for gRPC connections
> 2022/11/21 16:22:15 Listening for REST connections
> 2022/11/21 16:22:15 Fallback server listening on port: :1337

Running the Integration Tests

Open a new terminal window in the root project directory.

cd showcase
mvn verify -P enable-integration-tests -P enable-golden-tests

Note:

  • -P enable-golden-tests is optional. These tests do not require a local server.

Update the Golden Showcase Files

Open a new terminal window in the root project directory. Note that the underlying scripts will modify your $HOME folder by creating a .library_generation folder. This is the well-known location of the artifacts the generation scripts use. For more details see the development guide

# In repository's root directory
mvn clean install -DskipTests
cd showcase
mvn compile -P update