Add RenderProgram unit test file, see: #2

js/alpenglow-tests.js

@@ -15,6 +15,7 @@ import './clip/PolygonClippingTests.js';
 import './parallel/ParallelTests.js';
 import './webgpu/SnippetTests.js';
 import './webgpu/ExampleTests.js';
+import './render-program/RenderProgramTests.js';
 
 // Since our tests are loaded asynchronously, we must direct QUnit to begin the tests
 qunitStart();

js/render-program/RenderProgram.ts

@@ -116,6 +116,10 @@ export default abstract class RenderProgram {
     }
   }
 
+  // REVIEW: Documentation here would be helpful. I see that this is getting overridden, but when are we getting
+  // a RenderProgram and when are we getting null? What does the difference of that return value tell us?
+  // Is this what is actually doing the simplification based on the type of RenderProgram we are?
+  // Is null essentially saying that this RenderProgram cannot be simplified?
   protected getSimplified( children: RenderProgram[] ): RenderProgram | null {
     return null;
   }

js/render-program/RenderProgramTests.ts

@@ -0,0 +1,19 @@
+// Copyright 2023, University of Colorado Boulder
+
+/**
+ * Testing for RenderProgram vs a simplified RenderProgram
+ *
+ * @author Marla Schulz (PhET Interactive Simulations)
+ *
+ */
+
+import { RenderColor } from '../imports.js';
+import Vector4 from '../../../dot/js/Vector4.js';
+
+QUnit.module( 'RenderProgram' );
+
+QUnit.test( 'color', assert => {
+  const renderColorProgram = new RenderColor( new Vector4( 245, 40, 145, 0.8 ) );
+
+  assert.equal( renderColorProgram.getName(), 'RenderColor' );
+} );