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      1 # Copyright 2013 The Chromium Authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 from telemetry import test
      5 from telemetry.page import page_set
      6 from webgl_conformance import WebglConformanceValidator
      7 from webgl_conformance import conformance_harness_script
      8 from webgl_conformance import conformance_path
      9 
     10 
     11 robustness_harness_script = conformance_harness_script + r"""
     12   var robustnessTestHarness = {};
     13   robustnessTestHarness._contextLost = false;
     14   robustnessTestHarness.initialize = function() {
     15     var canvas = document.getElementById('example');
     16     canvas.addEventListener('webglcontextlost', function() {
     17       robustnessTestHarness._contextLost = true;
     18     });
     19   }
     20   robustnessTestHarness.runTestLoop = function() {
     21     // Run the test in a loop until the context is lost.
     22     main();
     23     if (!robustnessTestHarness._contextLost)
     24       window.requestAnimationFrame(robustnessTestHarness.runTestLoop);
     25     else
     26       robustnessTestHarness.notifyFinished();
     27   }
     28   robustnessTestHarness.notifyFinished = function() {
     29     // The test may fail in unpredictable ways depending on when the context is
     30     // lost. We ignore such errors and only require that the browser doesn't
     31     // crash.
     32     webglTestHarness._allTestSucceeded = true;
     33     // Notify test completion after a delay to make sure the browser is able to
     34     // recover from the lost context.
     35     setTimeout(webglTestHarness.notifyFinished, 3000);
     36   }
     37 
     38   window.confirm = function() {
     39     robustnessTestHarness.initialize();
     40     robustnessTestHarness.runTestLoop();
     41     return false;
     42   }
     43   window.webglRobustnessTestHarness = robustnessTestHarness;
     44 """
     45 
     46 
     47 class WebglRobustness(test.Test):
     48   enabled = False
     49   test = WebglConformanceValidator
     50 
     51   def CreatePageSet(self, options):
     52     page_set_dict = {
     53       'description': 'Test cases for WebGL robustness',
     54       'user_agent_type': 'desktop',
     55       'serving_dirs': [''],
     56       'pages': [
     57         {
     58           'url': 'file:///extra/lots-of-polys-example.html',
     59           'script_to_evaluate_on_commit': robustness_harness_script,
     60           'wait_for_javascript_expression': 'webglTestHarness._finished'
     61         }
     62       ]
     63     }
     64     return page_set.PageSet.FromDict(page_set_dict, conformance_path)
     65