Theming support:

1. Machinery to load specified theme files
2. Uses settings service to get selected theme
3. LMS theme
4. Blank apros theme - mentoring default css is essentially an Apros theme. Likely to move some parts of it later.
5. Unit and integration tests for theming

mentoring/mentoring.py

@@ -44,12 +44,18 @@ from xblockutils.studio_editable import StudioEditableXBlockMixin, StudioContain
 log = logging.getLogger(__name__)
 loader = ResourceLoader(__name__)
 
+_default_theme_config = {
+    'package': 'mentoring',
+    'locations': ['public/themes/lms.css']
+}
+
 # Classes ###########################################################
 
 Score = namedtuple("Score", ["raw", "percentage", "correct", "incorrect", "partially_correct"])
 
 
 @XBlock.needs("i18n")
+@XBlock.wants('settings')
 class MentoringBlock(XBlock, StepParentMixin, StudioEditableXBlockMixin, StudioContainerXBlockMixin):
     """
     An XBlock providing mentoring capabilities
@@ -156,14 +162,31 @@ class MentoringBlock(XBlock, StepParentMixin, StudioEditableXBlockMixin, StudioC
     has_score = True
     has_children = True
 
+    block_settings_key = 'mentoring'
+    theme_key = 'theme'
+
     def _(self, text):
         """ translate text """
         return self.runtime.service(self, "i18n").ugettext(text)
 
     @property
     def is_assessment(self):
+        """ Checks if mentoring XBlock is in assessment mode """
         return self.mode == 'assessment'
 
+    def get_theme(self):
+        """
+        Gets theme settings from settings service. Falls back to default (LMS) theme
+        if settings service is not available, xblock theme settings are not set or does
+        contain mentoring theme settings.
+        """
+        settings_service = self.runtime.service(self, "settings")
+        if settings_service:
+            xblock_settings = settings_service.get_settings_bucket(self)
+            if xblock_settings and self.theme_key in xblock_settings:
+                return xblock_settings[self.theme_key]
+        return _default_theme_config
+
     @property
     def score(self):
         """Compute the student score taking into account the weight of each step."""
@@ -178,6 +201,12 @@ class MentoringBlock(XBlock, StepParentMixin, StudioEditableXBlockMixin, StudioC
 
         return Score(score, int(round(score * 100)), correct, incorrect, partially_correct)
 
+    def include_theme_files(self, fragment):
+        theme = self.get_theme()
+        theme_package, theme_files = theme['package'], theme['locations']
+        for theme_file in theme_files:
+            fragment.add_css(ResourceLoader(theme_package).load_unicode(theme_file))
+
     def student_view(self, context):
         # Migrate stored data if necessary
         self.migrate_fields()
@@ -219,6 +248,7 @@ class MentoringBlock(XBlock, StepParentMixin, StudioEditableXBlockMixin, StudioC
         fragment.add_resource(loader.load_unicode('templates/html/mentoring_attempts.html'), "text/html")
         fragment.add_resource(loader.load_unicode('templates/html/mentoring_grade.html'), "text/html")
 
+        self.include_theme_files(fragment)
         # Workbench doesn't have font awesome, so add it:
         try:
             from workbench.runtime import WorkbenchRuntime
@@ -515,6 +545,7 @@ class MentoringBlock(XBlock, StepParentMixin, StudioEditableXBlockMixin, StudioC
             "url_name": self.url_name
         }))
         fragment.add_css_url(self.runtime.local_resource_url(self, 'public/css/mentoring_edit.css'))
+        self.include_theme_files(fragment)
         return fragment
 
     def author_edit_view(self, context):

mentoring/public/themes/lms.css

+.themed-xblock.mentoring .checkmark-incorrect {
+    color: #c1373f;
+}
+
+.themed-xblock.mentoring .checkmark-incorrect::before {
+    content: "\f00d";
+}
+
+.themed-xblock.mentoring .grade .checkmark-incorrect {
+    margin-left: 0;
+    margin-right: 10px;
+    width: 29px;
+}
+
+div.course-wrapper section.course-content .themed-xblock.mentoring p:empty {
+    display: block;
+    margin-bottom: 1.41575em;
+}
\ No newline at end of file

mentoring/templates/html/mentoring.html

-<div class="mentoring" data-mode="{{ self.mode }}" data-step="{{ self.step }}">
+<div class="mentoring themed-xblock" data-mode="{{ self.mode }}" data-step="{{ self.step }}">
   <div class="missing-dependency warning" data-missing="{{ self.has_missing_dependency }}">
     You need to complete <a href="{{ missing_dependency_url }}">the previous step</a> before
     attempting this step.

mentoring/tests/integration/base_test.py

@@ -34,3 +34,70 @@ MentoringBlock.url_name = String()
 class MentoringBaseTest(SeleniumBaseTest):
     module_name = __name__
     default_css_selector = 'div.mentoring'
+
+
+class MentoringAssessmentBaseTest(MentoringBaseTest):
+    @staticmethod
+    def question_text(number):
+        if number:
+            return "Question %s" % number
+        else:
+            return "Question"
+
+    def go_to_assessment(self, page):
+        """ Navigates to assessment page """
+        mentoring = self.go_to_page(page)
+
+        class Namespace(object):
+            pass
+
+        controls = Namespace()
+
+        controls.submit = mentoring.find_element_by_css_selector("input.input-main")
+        controls.next_question = mentoring.find_element_by_css_selector("input.input-next")
+        controls.review = mentoring.find_element_by_css_selector("input.input-review")
+        controls.try_again = mentoring.find_element_by_css_selector("input.input-try-again")
+
+        return mentoring, controls
+
+    def expect_question_visible(self, number, mentoring):
+        question_text = self.question_text(number)
+        self.wait_until_text_in(self.question_text(number), mentoring)
+        question_div = None
+        for xblock_div in mentoring.find_elements_by_css_selector('div.xblock-v1'):
+            header_text = xblock_div.find_elements_by_css_selector('h3.question-title')
+            if header_text and question_text in header_text[0].text:
+                question_div = xblock_div
+                self.assertTrue(xblock_div.is_displayed())
+            elif header_text:
+                self.assertFalse(xblock_div.is_displayed())
+            # else this is an HTML block or something else, not a question step
+
+        self.assertIsNotNone(question_div)
+        return question_div
+
+
+class GetChoices(object):
+    """ Helper class for interacting with MCQ options """
+    def __init__(self, question, selector=".choices"):
+        self._mcq = question.find_element_by_css_selector(selector)
+
+    @property
+    def text(self):
+        return self._mcq.text
+
+    @property
+    def state(self):
+        return {
+            choice.text: choice.find_element_by_css_selector("input").is_selected()
+            for choice in self._mcq.find_elements_by_css_selector(".choice")}
+
+    def select(self, text):
+        choice_wrapper = self.get_option_element(text)
+        choice_wrapper.find_element_by_css_selector("input").click()
+
+    def get_option_element(self, text):
+        for choice in self._mcq.find_elements_by_css_selector(".choice"):
+            if choice.text == text:
+                return choice
+        raise AssertionError("Expected selectable item present: {}".format(text))

mentoring/tests/integration/test_assessment.py

-from .base_test import MentoringBaseTest
+from .base_test import MentoringAssessmentBaseTest, GetChoices
 
 CORRECT, INCORRECT, PARTIAL = "correct", "incorrect", "partially-correct"
 
 
-class MentoringAssessmentTest(MentoringBaseTest):
+class MentoringAssessmentTest(MentoringAssessmentBaseTest):
     def _selenium_bug_workaround_scroll_to(self, mentoring, question):
         """Workaround for selenium bug:
 
@@ -41,27 +41,6 @@ class MentoringAssessmentTest(MentoringBaseTest):
         self.assertIn("A Simple Assessment", mentoring.text)
         self.assertIn("This paragraph is shared between all questions.", mentoring.text)
 
-    class _GetChoices(object):
-        def __init__(self, question, selector=".choices"):
-            self._mcq = question.find_element_by_css_selector(selector)
-
-        @property
-        def text(self):
-            return self._mcq.text
-
-        @property
-        def state(self):
-            return {
-                choice.text: choice.find_element_by_css_selector("input").is_selected()
-                for choice in self._mcq.find_elements_by_css_selector(".choice")}
-
-        def select(self, text):
-            for choice in self._mcq.find_elements_by_css_selector(".choice"):
-                if choice.text == text:
-                    choice.find_element_by_css_selector("input").click()
-                    return
-            raise AssertionError("Expected selectable item present: {}".format(text))
-
     def _assert_checkmark(self, mentoring, result):
         """Assert that only the desired checkmark is present."""
         states = {CORRECT: 0, INCORRECT: 0, PARTIAL: 0}
@@ -73,28 +52,6 @@ class MentoringAssessmentTest(MentoringBaseTest):
     def go_to_workbench_main_page(self):
         self.browser.get(self.live_server_url)
 
-    def go_to_assessment(self, number):
-        mentoring = self.go_to_page('Assessment %s' % number)
-
-        class Namespace(object):
-            pass
-
-        controls = Namespace()
-
-        controls.submit = mentoring.find_element_by_css_selector("input.input-main")
-        controls.next_question = mentoring.find_element_by_css_selector("input.input-next")
-        controls.review = mentoring.find_element_by_css_selector("input.input-review")
-        controls.try_again = mentoring.find_element_by_css_selector("input.input-try-again")
-
-        return mentoring, controls
-
-    @staticmethod
-    def question_text(number):
-        if number:
-            return "Question %s" % number
-        else:
-            return "Question"
-
     def freeform_answer(self, number, mentoring, controls, text_input, result, saved_value="", last=False):
         question = self.expect_question_visible(number, mentoring)
         self.assert_persistent_elements_present(mentoring)
@@ -166,7 +123,7 @@ class MentoringAssessmentTest(MentoringBaseTest):
         self.ending_controls(controls, last)
         self.assert_hidden(controls.try_again)
 
-        choices = self._GetChoices(question)
+        choices = GetChoices(question)
         expected_state = {"Yes": False, "Maybe not": False, "I don't understand": False}
         self.assertEquals(choices.state, expected_state)
 
@@ -194,7 +151,7 @@ class MentoringAssessmentTest(MentoringBaseTest):
         self.assert_hidden(controls.review)
         self.assert_hidden(controls.try_again)
 
-        choices = self._GetChoices(mentoring, ".rating")
+        choices = GetChoices(mentoring, ".rating")
         expected_choices = {
             "1 - Not good at all": False,
             "2": False, "3": False, "4": False,
@@ -214,22 +171,6 @@ class MentoringAssessmentTest(MentoringBaseTest):
         self._assert_checkmark(mentoring, result)
         self.do_post(controls, last)
 
-    def expect_question_visible(self, number, mentoring):
-        question_text = self.question_text(number)
-        self.wait_until_text_in(self.question_text(number), mentoring)
-        question_div = None
-        for xblock_div in mentoring.find_elements_by_css_selector('div.xblock-v1'):
-            header_text = xblock_div.find_elements_by_css_selector('h3.question-title')
-            if header_text and question_text in header_text[0].text:
-                question_div = xblock_div
-                self.assertTrue(xblock_div.is_displayed())
-            elif header_text:
-                self.assertFalse(xblock_div.is_displayed())
-            # else this is an HTML block or something else, not a question step
-
-        self.assertIsNotNone(question_div)
-        return question_div
-
     def peek_at_multiple_choice_question(self, number, mentoring, controls, last=False):
         question = self.expect_question_visible(number, mentoring)
         self.assert_persistent_elements_present(mentoring)
@@ -244,7 +185,7 @@ class MentoringAssessmentTest(MentoringBaseTest):
     def multiple_choice_question(self, number, mentoring, controls, choice_names, result, last=False):
         question = self.peek_at_multiple_choice_question(number, mentoring, controls, last=last)
 
-        choices = self._GetChoices(question)
+        choices = GetChoices(question)
         expected_choices = {
             "Its elegance": False,
             "Its beauty": False,
@@ -282,7 +223,7 @@ class MentoringAssessmentTest(MentoringBaseTest):
         self.assert_hidden(controls.review)
 
     def test_assessment(self):
-        mentoring, controls = self.go_to_assessment(1)
+        mentoring, controls = self.go_to_assessment("Assessment 1")
 
         self.freeform_answer(1, mentoring, controls, 'This is the answer', CORRECT)
         self.single_choice_question(2, mentoring, controls, 'Maybe not', INCORRECT)
@@ -291,7 +232,7 @@ class MentoringAssessmentTest(MentoringBaseTest):
 
         # see if assessment remembers the current step
         self.go_to_workbench_main_page()
-        mentoring, controls = self.go_to_assessment(1)
+        mentoring, controls = self.go_to_assessment("Assessment 1")
 
         self.multiple_choice_question(4, mentoring, controls, ("Its beauty",), PARTIAL, last=True)
 
@@ -324,7 +265,7 @@ class MentoringAssessmentTest(MentoringBaseTest):
         """
         No 'Next Question' button on single question assessment.
         """
-        mentoring, controls = self.go_to_assessment(2)
+        mentoring, controls = self.go_to_assessment("Assessment 2")
         self.single_choice_question(0, mentoring, controls, 'Maybe not', INCORRECT, last=True)
 
         expected_results = {

mentoring/tests/integration/test_mentoring.py

+import re
+import mock
+import ddt
 from selenium.common.exceptions import NoSuchElementException
-from .base_test import MentoringBaseTest
+from .base_test import MentoringBaseTest, MentoringAssessmentBaseTest, GetChoices
 
 
 class MentoringTest(MentoringBaseTest):
@@ -7,3 +10,46 @@ class MentoringTest(MentoringBaseTest):
         mentoring = self.go_to_page('No Display Submit')
         with self.assertRaises(NoSuchElementException):
             mentoring.find_element_by_css_selector('.submit input.input-main')
+
+
+def _get_mentoring_theme_settings(theme):
+    return {
+        'package': 'mentoring',
+        'locations': ['public/themes/{}.css'.format(theme)]
+    }
+
+
+@ddt.ddt
+class MentoringThemeTest(MentoringAssessmentBaseTest):
+    def rgb_to_hex(self, rgb):
+        r, g, b = map(int, re.search(r'rgba?\((\d+),\s*(\d+),\s*(\d+)', rgb).groups())
+        return '#%02x%02x%02x' % (r, g, b)
+
+    def assert_status_icon_color(self, color):
+        mentoring, controls = self.go_to_assessment('Theme 1')
+        question = self.expect_question_visible(0, mentoring)
+        choice_name = "Maybe not"
+
+        choices = GetChoices(question)
+        expected_state = {"Yes": False, "Maybe not": False, "I don't understand": False}
+        self.assertEquals(choices.state, expected_state)
+
+        choices.select(choice_name)
+        expected_state[choice_name] = True
+        self.assertEquals(choices.state, expected_state)
+
+        controls.submit.click()
+        self.wait_until_disabled(controls.submit)
+
+        answer_result = mentoring.find_element_by_css_selector(".assessment-checkmark")
+        self.assertEqual(self.rgb_to_hex(answer_result.value_of_css_property("color")), color)
+
+    @ddt.unpack
+    @ddt.data(
+        ('lms', "#c1373f"),
+        ('apros', "#ff0000")
+    )
+    def test_lms_theme_applied(self, theme, expected_color):
+        with mock.patch("mentoring.MentoringBlock.get_theme") as patched_theme:
+            patched_theme.return_value = _get_mentoring_theme_settings(theme)
+            self.assert_status_icon_color(expected_color)

mentoring/tests/integration/xml/theme_1.xml

+<mentoring url_name="mentoring-assessment-2" display_name="A Simple Assessment" weight="1" mode="assessment" max_attempts="2">
+    <html_demo>
+        <p>This paragraph is shared between <strong>all</strong> questions.</p>
+        <p>Please answer the questions below.</p>
+    </html_demo>
+
+    <mcq name="mcq_1_1" question="Do you like this MCQ?" correct_choices="yes">
+        <choice value="yes">Yes</choice>
+        <choice value="maybenot">Maybe not</choice>
+        <choice value="understand">I don't understand</choice>
+
+        <tip values="yes">Great!</tip>
+        <tip values="maybenot">Ah, damn.</tip>
+        <tip values="understand"><div id="test-custom-html">Really?</div></tip>
+    </mcq>
+</mentoring>

mentoring/tests/unit/test_mentoring.py

 import unittest
+import ddt
 from mock import MagicMock, Mock, patch
 from xblock.field_data import DictFieldData
 from mentoring import MentoringBlock
+from mentoring.mentoring import _default_theme_config
 
 
 class TestMentoringBlock(unittest.TestCase):
@@ -28,3 +30,81 @@ class TestMentoringBlock(unittest.TestCase):
             block.student_view(context={})
 
             self.assertFalse(patched_runtime.publish.called)
+
+
+@ddt.ddt
+class TestMentoringBlockTheming(unittest.TestCase):
+    def setUp(self):
+        self.service_mock = Mock()
+        self.runtime_mock = Mock()
+        self.runtime_mock.service = Mock(return_value=self.service_mock)
+        self.block = MentoringBlock(self.runtime_mock, DictFieldData({}), Mock())
+
+    def test_theme_uses_default_theme_if_settings_service_is_not_available(self):
+        self.runtime_mock.service = Mock(return_value=None)
+        self.assertEqual(self.block.get_theme(), _default_theme_config)
+
+    def test_theme_uses_default_theme_if_no_theme_is_set(self):
+        self.service_mock.get_settings_bucket = Mock(return_value=None)
+        self.assertEqual(self.block.get_theme(), _default_theme_config)
+        self.service_mock.get_settings_bucket.assert_called_once_with(self.block)
+
+    @ddt.data(123, object())
+    def test_theme_raises_if_theme_object_is_not_iterable(self, theme_config):
+        self.service_mock.get_settings_bucket = Mock(return_value=theme_config)
+        with self.assertRaises(TypeError):
+            self.block.get_theme()
+        self.service_mock.get_settings_bucket.assert_called_once_with(self.block)
+
+    @ddt.data(
+        {}, {'mass': 123}, {'spin': {}}, {'parity': "1"}
+    )
+    def test_theme_uses_default_theme_if_no_mentoring_theme_is_set_up(self, theme_config):
+        self.service_mock.get_settings_bucket = Mock(return_value=theme_config)
+        self.assertEqual(self.block.get_theme(), _default_theme_config)
+        self.service_mock.get_settings_bucket.assert_called_once_with(self.block)
+
+    @ddt.data(
+        {MentoringBlock.theme_key: 123},
+        {MentoringBlock.theme_key: [1, 2, 3]},
+        {MentoringBlock.theme_key: {'package': 'qwerty', 'locations': ['something_else.css']}},
+    )
+    def test_theme_correctly_returns_configured_theme(self, theme_config):
+        self.service_mock.get_settings_bucket = Mock(return_value=theme_config)
+        self.assertEqual(self.block.get_theme(), theme_config[MentoringBlock.theme_key])
+
+    def test_theme_files_are_loaded_from_correct_package(self):
+        fragment = MagicMock()
+        package_name = 'some_package'
+        theme_config = {MentoringBlock.theme_key: {'package': package_name, 'locations': ['lms.css']}}
+        self.service_mock.get_settings_bucket = Mock(return_value=theme_config)
+        with patch("mentoring.mentoring.ResourceLoader") as patched_resource_loader:
+            self.block.include_theme_files(fragment)
+            patched_resource_loader.assert_called_with(package_name)
+
+    @ddt.data(
+        ('mentoring', ['public/themes/lms.css']),
+        ('mentoring', ['public/themes/lms.css', 'public/themes/lms.part2.css']),
+        ('my_app.my_rules', ['typography.css', 'icons.css']),
+    )
+    @ddt.unpack
+    def test_theme_files_are_added_to_fragment(self, package_name, locations):
+        fragment = MagicMock()
+        theme_config = {MentoringBlock.theme_key: {'package': package_name, 'locations': locations}}
+        self.service_mock.get_settings_bucket = Mock(return_value=theme_config)
+        with patch("mentoring.mentoring.ResourceLoader.load_unicode") as patched_load_unicode:
+            self.block.include_theme_files(fragment)
+            for location in locations:
+                patched_load_unicode.assert_any_call(location)
+
+            self.assertEqual(patched_load_unicode.call_count, len(locations))
+
+    def test_student_view_calls_include_theme_files(self):
+        with patch.object(self.block, 'include_theme_files') as patched_include_theme_files:
+            fragment = self.block.student_view({})
+            patched_include_theme_files.assert_called_with(fragment)
+
+    def test_author_preview_view_calls_include_theme_files(self):
+        with patch.object(self.block, 'include_theme_files') as patched_include_theme_files:
+            fragment = self.block.author_preview_view({})
+            patched_include_theme_files.assert_called_with(fragment)

requirements.txt

 ddt
+mock
 unicodecsv==0.9.4
 -e git+https://github.com/open-craft/xblock-utils.git@387a3ed97725d167862014e2367548ff54e4c1b7#egg=xblock-utils
 -e .