SPA tests fail

[jgosmann]

at least on my Macbook

============================= test session starts ==============================
platform darwin -- Python 2.7.12, pytest-2.9.2, py-1.4.31, pluggy-0.3.1
rootdir: /Volumes/Home/blubb/Documents/projects/uni/nengo_gui, inifile:
collected 1 items

nengo_gui/tests/test_spa.py F

=================================== FAILURES ===================================
___________________________________ test_spa ___________________________________

driver = <selenium.webdriver.firefox.webdriver.WebDriver (session="b48982de-580f-f944-b196-f82a3d880bdc")>

    def test_spa(driver):
        # Tests the functionality of SPA simulations

        try:
            #Test page response by clicking the reset button and applying new code to ace-editor
            test_file  = """
    import nengo
    import nengo.spa as spa

    D = 2  # the dimensionality of the vectors

    model = spa.SPA()
    with model:
        model.color = spa.State(D)
        model.shape = spa.State(D)
        model.memory = spa.State(D, feedback=1)
        model.query = spa.State(D)
        model.answer = spa.State(D)

        actions = spa.Actions(
            "memory = color * shape",
            "answer = memory * ~query",
            )

        model.cortical = spa.Cortical(actions)
            """
            tt.reset_page(driver)
            tt.update_editor(driver, test_file)
            tt.mouse_scroll(driver,200)

            # Generates semantic pointer clouds for each network
            driver.execute_script("""
            var a = Nengo.netgraph.svg_objects;
            for(model in a){
                if(a[model].sp_targets.length > 0){
                    a[model].create_graph('Pointer',a[model].sp_targets[0]);
                    a[model].create_graph('SpaSimilarity',a[model].sp_targets[0]);
                }
            };
            """)
            time.sleep(1)
            # Ensures the simulation has started
            hang_time = 100 # alloted time until test fails
            compiled = False
            tt.start_stop_sim(driver)
            time_start = time.time()
            while(time.time() - time_start < hang_time):
                time_script = 'var time = $("#ticks_tr"); \
                return time.find("td").text()'
                sim_time = driver.execute_script(time_script)
                if(float(sim_time) > 0):
                    compiled = True
                    break
                time.sleep(1)

            assert(compiled)

            # Sets the semantic pointers appropriately
            spa_values = {"shape":"CIRCLE", "color":"BLUE", "query":"CIRCLE"}
            set_cloud_value(driver,spa_values)
            time.sleep(10)
            result = driver.execute_script("""
            var objects = Nengo.Component.components;
            var answer = objects.filter(function(item){
                  return item.label.innerHTML == "answer";}
            )[0];
            var answer_data = answer.data_store.data[0];
            var result = answer_data.pop();
            return result
            """)

            data_script = """
            shape_data = Nengo.Component.components.filter(function(item){
                return (item.constructor === Nengo.SpaSimilarity);
            })[0].data_store.data;
            return shape_data;
            """
            plot_data = driver.execute_script(data_script)

            # Checks that the 'answer' is BLUE
            assert any("BLUE" in x for x in result)

            # Checks the dimensionality of the spa similarity plot
            assert(len(plot_data) == 2 and len(plot_data[0]) > 1)

            set_cloud_value(driver,{"color":"ORANGE"})

            time.sleep(10)

            plot_data = driver.execute_script(data_script)

            # Checks that the data store grows when input changes
            assert(len(plot_data) == 3 and len(plot_data[0]) > 1)

        except Exception as e:
            #Travis Only: On fail takes screenshot and uploads it to imgur


            if('TRAVIS' in os.environ):
                tt.imgur_screenshot(driver)

            _, _, tb = sys.exc_info()
            traceback.print_tb(tb) # Fixed format
            tb_info = traceback.extract_tb(tb)
            filename, line, func, text = tb_info[-1]

            print('An error occurred on line {} in statement {}'.format(line, text))
            print(str(e))
>           exit(1)

nengo_gui/tests/test_spa.py:137:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = Use exit() or Ctrl-D (i.e. EOF) to exit, code = 1

    def __call__(self, code=None):
        # Shells like IDLE catch the SystemExit, but listen when their
        # stdin wrapper is closed.
        try:
            sys.stdin.close()
        except:
            pass
>       raise SystemExit(code)
E       SystemExit: 1

../../../../.virtualenvs/nengogui/lib/python2.7/site.py:403: SystemExit
----------------------------- Captured stdout call -----------------------------
An error occurred on line 192 in statement raise exception_class(message, screen, stacktrace)
Message: Unable to locate element: {"method":"xpath","selector":"//*[@id='singleInput']"}
Stacktrace:
    at FirefoxDriver.prototype.findElementInternal_ (file:///var/folders/t7/99gtw6151wz7r76dzhxl08vr0000gn/T/tmp1DK3RX/extensions/[email protected]/components/driver-component.js:10770)
    at FirefoxDriver.prototype.findElement (file:///var/folders/t7/99gtw6151wz7r76dzhxl08vr0000gn/T/tmp1DK3RX/extensions/[email protected]/components/driver-component.js:10779)
    at DelayedCommand.prototype.executeInternal_/h (file:///var/folders/t7/99gtw6151wz7r76dzhxl08vr0000gn/T/tmp1DK3RX/extensions/[email protected]/components/command-processor.js:12661)
    at DelayedCommand.prototype.executeInternal_ (file:///var/folders/t7/99gtw6151wz7r76dzhxl08vr0000gn/T/tmp1DK3RX/extensions/[email protected]/components/command-processor.js:12666)
    at DelayedCommand.prototype.execute/< (file:///var/folders/t7/99gtw6151wz7r76dzhxl08vr0000gn/T/tmp1DK3RX/extensions/[email protected]/components/command-processor.js:12608)
----------------------------- Captured stderr call -----------------------------
  File "/Volumes/Home/blubb/Documents/projects/uni/nengo_gui/nengo_gui/tests/test_spa.py", line 88, in test_spa
    set_cloud_value(driver,spa_values)
  File "/Volumes/Home/blubb/Documents/projects/uni/nengo_gui/nengo_gui/tests/test_spa.py", line 22, in set_cloud_value
    field = driver.find_element_by_xpath("//*[@id='singleInput']")
  File "/Volumes/Home/blubb/.virtualenvs/nengogui/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 293, in find_element_by_xpath
    return self.find_element(by=By.XPATH, value=xpath)
  File "/Volumes/Home/blubb/.virtualenvs/nengogui/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 752, in find_element
    'value': value})['value']
  File "/Volumes/Home/blubb/.virtualenvs/nengogui/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 236, in execute
    self.error_handler.check_response(response)
  File "/Volumes/Home/blubb/.virtualenvs/nengogui/lib/python2.7/site-packages/selenium/webdriver/remote/errorhandler.py", line 192, in check_response
    raise exception_class(message, screen, stacktrace)
========================== 1 failed in 12.30 seconds ===========================

[tbekolay]

I've also had this fail sporadically for me. My guess is that the time.sleep calls need to be tweaked, but I wouldn't worry about this for the time being as I plan to improve the testing infrastructure in #806.