1 files changed, 105 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/js/tests/instanceof-test.js b/dom/canvas/test/webgl-conf/checkout/js/tests/instanceof-test.js
new file mode 100644
index 0000000000..edcad3b1f6
--- /dev/null
+++ b/dom/canvas/test/webgl-conf/checkout/js/tests/instanceof-test.js
@@ -0,0 +1,105 @@
+/*
+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.
+*/
+
+// This test relies on the surrounding web page defining a variable
+// "contextVersion" which indicates what version of WebGL it's running
+// on -- 1 for WebGL 1.0, 2 for WebGL 2.0, etc.
+
+"use strict";
+var wtu = WebGLTestUtils;
+description(document.title);
+debug("Tests that instanceof works on WebGL objects.");
+debug("");
+
+function checkGLError(message) {
+  var error = gl.getError();
+  if (error != gl.NO_ERROR) {
+    wtu.error("Error: " + message + " caused " + wtu.glEnumToString(gl, error));
+  }
+}
+
+var gl = wtu.create3DContext("canvas", undefined, contextVersion);
+if (contextVersion === 1) {
+  shouldBeTrue('gl instanceof WebGLRenderingContext');
+} else if (contextVersion === 2) {
+  shouldBeTrue('gl instanceof WebGL2RenderingContext');
+}
+
+shouldBeTrue('gl.createBuffer() instanceof WebGLBuffer');
+checkGLError("createBuffer")
+
+shouldBeTrue('gl.createFramebuffer() instanceof WebGLFramebuffer');
+checkGLError("createFramebuffer")
+
+shouldBeTrue('gl.createProgram() instanceof WebGLProgram');
+checkGLError("createProgram")
+
+shouldBeTrue('gl.createRenderbuffer() instanceof WebGLRenderbuffer');
+checkGLError("createRenderbuffer")
+
+shouldBeTrue('gl.createShader(gl.VERTEX_SHADER) instanceof WebGLShader');
+checkGLError("createShader")
+
+shouldBeTrue('gl.createTexture() instanceof WebGLTexture');
+checkGLError("createTexture")
+
+if (contextVersion > 1) {
+  shouldBeTrue('gl.createQuery() instanceof WebGLQuery');
+  checkGLError("createQuery")
+
+  shouldBeTrue('gl.createSampler() instanceof WebGLSampler');
+  checkGLError("createSampler")
+
+  shouldBeTrue('gl.createTransformFeedback() instanceof WebGLTransformFeedback');
+  checkGLError("createTransformFeedback")
+
+  shouldBeTrue('gl.createVertexArray() instanceof WebGLVertexArrayObject');
+  checkGLError("createVertexArray")
+}
+
+var program = wtu.setupProgram(gl, ['vshader', 'fshader'], ['vPosition'], [0]);
+
+shouldBeTrue('gl.getUniformLocation(program, "color") instanceof WebGLUniformLocation');
+checkGLError("getUniformLocation")
+
+shouldBeTrue('gl.getActiveAttrib(program, 0) instanceof WebGLActiveInfo');
+checkGLError("getActiveAttrib")
+
+shouldBeTrue('gl.getActiveUniform(program, 0) instanceof WebGLActiveInfo');
+checkGLError("getActiveUniform")
+
+debug("");
+debug("Tests that those WebGL objects can not be constructed through new operator");
+debug("");
+
+function shouldThrowWithNew(objectType, objectName) {
+  try {
+    new objectType;
+    testFailed('new ' + objectName + ' did not throw');
+  } catch (e) {
+    testPassed('new ' + objectName + ' threw an error');
+  }
+}
+
+shouldThrowWithNew(window.WebGLRenderingContext, 'WebGLRenderingContext');
+shouldThrowWithNew(window.WebGLActiveInfo, 'WebGLActiveInfo');
+shouldThrowWithNew(window.WebGLBuffer, 'WebGLBuffer');
+shouldThrowWithNew(window.WebGLFramebuffer, 'WebGLFramebuffer');
+shouldThrowWithNew(window.WebGLProgram, 'WebGLProgram');
+shouldThrowWithNew(window.WebGLRenderbuffer, 'WebGLRenderbuffer');
+shouldThrowWithNew(window.WebGLShader, 'WebGLShader');
+shouldThrowWithNew(window.WebGLTexture, 'WebGLTexture');
+shouldThrowWithNew(window.WebGLUniformLocation, 'WebGLUniformLocation');
+shouldThrowWithNew(window.WebGLShaderPrecisionFormat, 'WebGLShaderPrecisionFormat');
+if (contextVersion > 1) {
+  shouldThrowWithNew(window.WebGLQuery, 'WebGLQuery');
+  shouldThrowWithNew(window.WebGLSampler, 'WebGLSampler');
+  shouldThrowWithNew(window.WebGLSync, 'WebGLSync');
+  shouldThrowWithNew(window.WebGLTransformFeedback, 'WebGLTransformFeedback');
+  shouldThrowWithNew(window.WebGLVertexArrayObject, 'WebGLVertexArrayObject');
+}
+
+var successfullyParsed = true;