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Copyright (c) 2019 The Khronos Group Inc.

Use of this source code is governed by an MIT-style license that can be

found in the LICENSE.txt file.

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<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8">

<title>WebGL gl.getParameter Strings Conformance Tests</title>

<link rel="stylesheet" href="../../resources/js-test-style.css"/>

<script src="../../js/js-test-pre.js"></script>

<script src="../../js/webgl-test-utils.js"></script>

</head>

<body>

<div id="description"></div>

<div id="console"></div>

<canvas id="canvas" width="2" height="2"> </canvas>

<script>

"use strict";

description("This test checks getParameter returns strings in the correct format");

debug("");

debug("Canvas.getContext");

var wtu = WebGLTestUtils;

var gl = wtu.create3DContext("canvas", null, 2);

if (!gl) {

  testFailed("context does not exist");

} else {

  testPassed("context exists");

  debug("");

  checkPrefix("WebGL 2.0", "VERSION");

  checkPrefix("WebGL GLSL ES 3.00", "SHADING_LANGUAGE_VERSION");

  shouldBeNonNull("gl.getParameter(gl.VENDOR)");

  shouldBeNonNull("gl.getParameter(gl.RENDERER)");

  shouldBe("gl.getError()", "gl.NO_ERROR");

function checkPrefix(expected, enum_val) {

  var s = gl.getParameter(gl[enum_val]);

  if (s != null &&

      s.length >= expected.length &&

      s.substring(0, expected.length) == expected) {

    testPassed("getParameter(gl." + enum_val + ") correctly started with " + expected);

  } else {

    testFailed("getParameter(gl." + enum_val + ") did not start with " + expected);

debug("");

var successfullyParsed = true;

</script>

<script src="../../js/js-test-post.js"></script>

</body>

</html>