Conformance test

The GeoAPI conformance module provides two kind of Java classes:

• Validators for testing the conformance of existing instances of GeoAPI interfaces.
• TestCases as suites of JUnit tests.

  For example an implementor can test the validity of his Coordinate Reference System objects and related objects in a test suite like below:

  import org.junit.*;
  import static org.opengis.test.Validators.*;
  
  public class MyTests {
      @Test
      public void testMyCRS() {
          CoordinateReferenceSystem crs = ...
          validate(crs);
  
          MathTransform transform = ...
          validate(transform);
      }
  }

  Validators are thread-safe except for the configuration phase (which is optional and usually executed only once before the tests begin). They test the logical consistency of their argument. For example if given a chain of concatenated transforms, validate(object) will ensure that the source dimension of a transformation step is equals to the target dimension of the previous step. Dependencies are traversed recursively, for example validating a CoordinateReferenceSystem object implies validating its CoordinateSystem and Datum attributes.