gpu.js/test/issues/357-modulus-issue.js

const { assert, skip, test, module: describe, only } = require('qunit');
const { GPU } = require('../../src');

describe('issue #357');

//TODO: move to math features
function testModKernel(mode) {
	const gpu = new GPU({mode});
	const nValues = 100;

	const myFunc3 = gpu.createKernel(function(x) {
		return x[this.thread.x % 3];
	}).setOutput([nValues]);

	const input = [1, 2, 3];
	myFunc3(input);

	const expected = new Float32Array(nValues);
	for (let i = 0; i < nValues; i++) {
		expected[i] = input[i % 3];
	}
	assert.deepEqual(myFunc3([1, 2, 3]), expected);
	gpu.destroy();
}

(GPU.isWebGLSupported ? test : skip)('Issue #357 - modulus issue webgl', () => {
	testModKernel('webgl');
});

(GPU.isWebGL2Supported ? test : skip)('Issue #357 - modulus issue webgl2', () => {
	testModKernel('webgl2');
});

(GPU.isHeadlessGLSupported ? test : skip)('Issue #357 - modulus issue headlessgl', () => {
	testModKernel('headlessgl');
});