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UnitTestSCAD: expect(cube.scad).toBe(cube);

Unit Testing for OpenSCAD

UnitTestSCAD brings forth unit testing capabilities to OpenSCAD. Unit testing enables you to check for regressions, accuracy and robustness of code in a fast, repeatable manner. Speed of development increases as unit tests will worry about your regressions, and allow you to plow ahead with your vision.

Contents

Getting Started

Installing OpenSCAD

UnitTestSCAD has a very strong dependency on OpenSCAD. This is because UnitTestSCAD uses some of the features from OpenSCAD to perform some of its underlying testing.

Simply start by installing OpenSCAD if you have not done so already:

OpenSCAD Home

Adding OpenSCAD to PATH

In order for UnitTestSCAD to take advantage of OpenSCAD's features, the folder which contains the OpenSCAD files must be added to the PATH environment variable on your machine.

While the path will generally be the same on all platforms (Windows, Linux, Mac), the file they point to specifically is different. If you have moved the respective file manually, you will need to point at:

  • Windows: openscad.com
  • Linux: openscad.exe
  • Mac: openscad.exe

These files will be in the location where you installed OpenSCAD. For example, by default on Windows: C:/Program Files/OpenSCAD.

Note: The path to the folder containing the files is to be added to the PATH environment variable.

Installing NodeJS and NPM

UnitTestSCAD is powered by NodeJS and distributed by NPM. They are distributed together and complement each other well. Follow the installation from the NodeJS website if you do not have these installed:

NodeJS Home

Installing UnitTestSCAD

If all has gone well, then installing UnitTestSCAD will be a simple command to run in the command line/terminal.

To install UnitTestSCAD, run the command:

npm i unittestscad

Usage

UnitTestSCAD should be required as standard into a NodeJS script.

const UnitTestSCAD = require('unittestscad');

UnitTestSCAD exposes several classes designed to enable assertions on your .scad functions and modules. For example, to assert against a .scad file which produces a 3d model (my3dmodel.scad), you can create it as such:

const my3dmodel = new UnitTestSCAD.ThreeDModule({
  include: ['my3dmodel.scad'],
  variables: {
    points: '[[0, 0], [1,1]]',
    range: '[0 : 20 : 80]',
    width: 5.56,
    text: '"some text"',
    withExtension: true,
    $fn: 100,
  }
});

expect(my3dmodel.width).toBe(5.56);

API Reference

See API Documentation for more details.

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4.1.0

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