shader node api tests

shadernode

   var inputVariables = [ a, b, c];
   var outputVariable = factory.getVariable('vec4','outputResult');

   factory.getNodeAdd().inputs(inputsVariables).output(outputVariable);

   var normal = this.getOrCreateNormal();

   var lightingInputs = {
      lights: lights
      normal: normal,
      view: eyeVector,
      ambient: materialAmbient,
      diffuse: materialDiffuse,
      specular: materialSpecular,
      shininess: materialShininess,
   };

   var outputLighting = factory.getVariable('vec4','outputResult');
   factory.getNodeLighting().inputs( lightingInputs ).output( outputLighting );
   factory.getAddNode().inputs( [ outputLighting, materialEmission ] ).output( outputLighting );
   
   var alpha = factory.getVariable('float);
   var inputsAlpha = {
     rgb: outputLighting
   };
   var alphaOutput = {
      alpha: alpha
   };
   factory.getNode('InlineCode').code( '%alpha = %rgb.a * %rgb.a', ).inputs(inputsAlpha).outputs(alphaOutput);