chore(tests): add test for CoincidentTopologyHelper functions

Author: PaulHax

Sources/Rendering/Core/Mapper/test/testCoincidentTopologyHelper.js

@@ -0,0 +1,38 @@
+import test from 'tape';
+import testUtils from 'vtk.js/Sources/Testing/testUtils';
+
+import vtkMapper from 'vtk.js/Sources/Rendering/Core/Mapper';
+
+test('Test calling CoincidentTopologyHelper static functions', async (t) => {
+  const gc = testUtils.createGarbageCollector(t);
+
+  // set back to starting/default values to avoid side effects for other tests
+  const startingParameters =
+    vtkMapper.getResolveCoincidentTopologyPolygonOffsetParameters();
+  vtkMapper.setResolveCoincidentTopologyPolygonOffsetParameters({
+    factor: -3,
+    offset: -3,
+  });
+  vtkMapper.setResolveCoincidentTopologyPolygonOffsetParameters(
+    startingParameters
+  );
+  const endingParameters =
+    vtkMapper.getResolveCoincidentTopologyPolygonOffsetParameters();
+  t.deepEqual(
+    startingParameters,
+    endingParameters,
+    'Initial PolygonOffset parameters after get and set are matching'
+  );
+
+  const startingLineParameters =
+    vtkMapper.getResolveCoincidentTopologyLineOffsetParameters();
+  vtkMapper.setResolveCoincidentTopologyLineOffsetParameters(-3, -3);
+  vtkMapper.setResolveCoincidentTopologyLineOffsetParameters(
+    startingLineParameters
+  );
+
+  t.ok('rendering', 'CoincidentTopologyHelper functions called without error');
+
+  // Free memory, end the test
+  gc.releaseResources();
+});