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diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/state/gl-enable-enum-test.html b/dom/canvas/test/webgl-conf/checkout/conformance/state/gl-enable-enum-test.html
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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.
+-->
+
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>WebGL gl.ENABLE enums Conformance Tests</title>
+<link rel="stylesheet" href="../../resources/js-test-style.css"/>
+<script src="../../js/desktop-gl-constants.js"></script>
+<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>
+<script>
+"use strict";
+description("This test ensures WebGL implementations allow OpenGL ES 2.0 features to be turned on but not non OpenGL ES 2.0 features.");
+
+var wtu = WebGLTestUtils;
+
+var invalidEnums = [
+  'ALPHA_TEST',
+  'AUTO_NORMAL',
+  'CLIP_PLANE0',
+  'CLIP_PLANE1',
+  'COLOR_LOGIC_OP',
+  'COLOR_MATERIAL',
+  'COLOR_SUM',
+  'COLOR_TABLE',
+  //'CONVOLUTION_1D',
+  //'CONVOLUTION_2D',
+  'FOG',
+  'HISTOGRAM',
+  'INDEX_LOGIC_OP',
+  'LIGHT0',
+  'LIGHT1',
+  'LIGHTING',
+  'LINE_SMOOTH',
+  'LINE_STIPPLE',
+  'MAP1_COLOR_4',
+  'MAP1_INDEX',
+  'MAP1_NORMAL',
+  'MAP1_TEXTURE_COORD_1',
+  'MAP1_TEXTURE_COORD_2',
+  'MAP1_TEXTURE_COORD_3',
+  'MAP1_TEXTURE_COORD_4',
+  'MAP1_VERTEX_3',
+  'MAP1_VERTEX_4',
+  'MAP2_COLOR_4',
+  'MAP2_INDEX',
+  'MAP2_NORMAL',
+  'MAP2_TEXTURE_COORD_1',
+  'MAP2_TEXTURE_COORD_2',
+  'MAP2_TEXTURE_COORD_3',
+  'MAP2_TEXTURE_COORD_4',
+  'MAP2_VERTEX_3',
+  'MAP2_VERTEX_4',
+  'MINMAX',
+  'MULTISAMPLE',
+  'NORMALIZE',
+  'POINT_SMOOTH',
+  'POINT_SPRITE',
+  'POLYGON_OFFSET_LINE',
+  'POLYGON_OFFSET_POINT',
+  'POLYGON_SMOOTH',
+  'POLYGON_STIPPLE',
+  'POST_COLOR_MATRIX_COLOR_TABLE',
+  'POST_CONVOLUTION_COLOR_TABLE',
+  'RESCALE_NORMAL',
+  'SAMPLE_ALPHA_TO_ONE',
+  //'SEPARABLE_2D',
+  'TEXTURE_1D',
+  'TEXTURE_2D',
+  'TEXTURE_3D',
+  'TEXTURE_CUBE_MAP',
+  'TEXTURE_GEN_Q',
+  'TEXTURE_GEN_R',
+  'TEXTURE_GEN_S',
+  'TEXTURE_GEN_T',
+  'VERTEX_PROGRAM_POINT_SIZE',
+  'VERTEX_PROGRAM_TWO_SIDE'
+];
+var validEnums = [
+  'BLEND',
+  'CULL_FACE',
+  'DEPTH_TEST',
+  'DITHER',
+  'POLYGON_OFFSET_FILL',
+  'SAMPLE_ALPHA_TO_COVERAGE',
+  'SAMPLE_COVERAGE',
+  'SCISSOR_TEST',
+  'STENCIL_TEST'
+];
+
+var gl;
+
+function runNegativeTests() {
+  debug("");
+  debug("Running negative tests");
+
+  gl = wtu.create3DContext();
+  if (!gl) {
+    testFailed("context does not exist");
+    return;
+  }
+  testPassed("context exists");
+
+  for (var ii = 0; ii < invalidEnums.length; ++ii) {
+    var name = invalidEnums[ii];
+    gl.enable(desktopGL[name]);
+    wtu.glErrorShouldBe(gl, gl.INVALID_ENUM,
+              "gl.enable must set INVALID_ENUM when passed GL_" + name );
+  }
+}
+
+function runPositiveTestsWithParameters(params) {
+  debug("");
+  debug("Running positive tests with parameters: " + JSON.stringify(params));
+
+  // Pass null for the canvas, to make sure we create a new context each time.
+  var newgl = wtu.create3DContext(null, params);
+  if (gl == newgl) {
+    testFailed("got an old context");
+    return;
+  }
+  gl = newgl;
+  if (!gl) {
+    testFailed("context does not exist");
+    return;
+  }
+  testPassed("context exists");
+
+  debug("Checking gl.ENABLE enums.");
+
+  for (var ii = 0; ii < validEnums.length; ++ii) {
+    var name = validEnums[ii];
+    gl.enable(gl[name]);
+    wtu.glErrorShouldBe(gl, gl.NO_ERROR,
+              "gl.enable must succeed when passed gl." + name );
+    shouldBe('gl.isEnabled(gl.' + name + ')', 'true');
+    shouldBe('gl.getParameter(gl.' + name + ')', 'true');
+    gl.disable(gl[name]);
+    shouldBe('gl.isEnabled(gl.' + name + ')', 'false');
+    shouldBe('gl.getParameter(gl.' + name + ')', 'false');
+    wtu.glErrorShouldBe(gl, gl.NO_ERROR,
+              "gl.isEnabled and gl.GetParameter must not set errors when passed GL_" + name );
+  }
+
+  wtu.glErrorShouldBe(gl, gl.NO_ERROR, "there should be no errors");
+}
+
+runNegativeTests();
+runPositiveTestsWithParameters({alpha: true, antialias: true, stencil: true, depth: true});
+runPositiveTestsWithParameters({alpha: false, antialias: true, stencil: true, depth: true});
+runPositiveTestsWithParameters({alpha: true, antialias: false, stencil: true, depth: true});
+runPositiveTestsWithParameters({alpha: true, antialias: true, stencil: false, depth: true});
+runPositiveTestsWithParameters({alpha: true, antialias: true, stencil: true, depth: false});
+
+debug("");
+var successfullyParsed = true;
+
+</script>
+<script src="../../js/js-test-post.js"></script>
+
+</body>
+</html>