OGC API - Features Conformance Test Suite

Scope

This executable test suite (ETS) verifies that an OGC API - Features instance conforms to OGC API - Features - Part 1: Core (OGC 17-069r3) and related standards. Conformance testing is a kind of "black box" testing that examines externally visible characteristics or behaviors of the SUT and is independent of any implementation details.

Several conformance classes are defined in the principal specifications. The ones listed below are covered by this test suite:

  • Core

    • The Core specifies requirements that all OGC API - Features instances have to fulfill.

Test requirements

The documents listed below stipulate requirements that must be satisfied by a conforming implementation.

There are some requirements the test suite expects to be satisfied by the service under test:

  • The API landing page response must be available in JSON.

  • The API definition response must be available in OpenAPI 3.0.

  • The conformance classes response must be available in JSON.

  • The feature collections metadata response and feature collection metadata responses must be available in JSON.

  • Feature collections and features must be available in GeoJSON.

Test suite structure

The test suite definition file (testng.xml) is located in the root package, org.opengis.cite.ogcapifeatures10. A conformance class corresponds to a <test> element, each of which includes a set of test classes that contain the actual test methods. The general structure of the test suite is shown in Table 1.

Table 1. Test suite structure
Conformance class Test classes

Core

  • org.opengis.cite.ogcapifeatures10.general.*

  • org.opengis.cite.ogcapifeatures10.apidescription.*

  • org.opengis.cite.ogcapifeatures10.conformance.*

  • org.opengis.cite.ogcapifeatures10.collections.*

The Javadoc documentation provides more detailed information about the test methods that constitute the suite.

How to run the tests

The options for running the test suite are summarized below.

As entry point the API landing page of an OGC API - Features instance is expected.

1. Integrated development environment (IDE)

Use a Java IDE such as Eclipse, NetBeans, or IntelliJ. Clone the repository and build the project.

Set the main class to run: org.opengis.cite.ogcapifeatures10.TestNGController

Arguments: The first argument must refer to an XML properties file containing the required test run arguments. If not specified, the default location at $ {user.home}/test-run-props.xml will be used.

You can modify the sample file in src/main/config/test-run-props.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">
<properties version="1.0">
  <comment>Test run arguments</comment>
  <entry key="iut">https://www.ldproxy.nrw.de/rest/services/kataster/</entry>
</properties>

The TestNG results file (testng-results.xml) will be written to a subdirectory in ${user.home}/testng/ having a UUID value as its name.

2. Command shell (console)

One of the build artifacts is an "all-in-one" JAR file that includes the test suite and all of its dependencies; this makes it very easy to execute the test suite in a command shell:

java -jar ets-ogcapi-features10-${version}-aio.jar [-o|--outputDir $TMPDIR] [test-run-props.xml]

3. Docker

This test suite comes with a Dockerfile which can be used to easily setup the OGC test harness with the test suite.

You need to retrieve the image from Docker Hub by running the following

docker run -p 8081:8080 ogccite/ets-ogcapi-features10

Then, open http://localhost:8081/teamengine/ to see below

welcome ogccite 01

Login with user and password 'ogctest'

login ogccite 02

Create a new session from the list

test session ogccite 03

Choose 'OGC' organization then Specification 'OGC API - Features - 1.0'

complete test session ogccite 04

Choose the endpoint URL to test if you query all the endpoints (it could take too long depending of the available datasets for the endpoint)

ogc api features conformance test suite ogccite 05

Wait test execution and see the results from the validator

result ogc api features test suite ogccite 06

HTTP calls to localhost are not working with Docker. You need to make calls using host IP (ipconfig on Windows or ifconfig on Unix based OS like Linux or Mac)

4. OGC test harness

Use TEAM Engine, the official OGC test harness. The latest test suite release are usually available at the beta testing facility. You can also build and deploy the test harness yourself and use a local installation.

Using the REST API

Using the REST API of the TEAM Engine requires some run arguments. These are summarized in Table 2. The Obligation descriptor can have the following values: M (mandatory), O (optional), or C (conditional).

Table 2. Test run arguments
Name Value domain Obligation Description

iut

URI

M

A URI that refers to the landing page of the service under test. Ampersand ('&') characters must be percent-encoded as '%26'.

noofcollections

Integer

O

Number of collections under test. -1 means that all collections should be tested. Default: 3