add mdx-linkify to markdown extensions

this is really pushing my patience for CSS, but I've always thought this
looked nice, so I'm going to try to retain it

incorporealcms/__init__.py

@@ -3,6 +3,7 @@ import logging
 import os
 from logging.config import dictConfig
 
+import markdown
 from flask import Flask, request, send_from_directory
 
 from ._version import get_versions
@@ -31,6 +32,10 @@ def create_app(instance_path=None, test_config=None):
 
     logger.debug("instance path: %s", app.instance_path)
 
+    # initialize markdown parser from config, but include
+    # extensions our app depends on, like the meta extension
+    app.config['md'] = markdown.Markdown(extensions=app.config['MARKDOWN_EXTENSIONS'] + ['meta'])
+
     @app.before_request
     def log_request():
         logger.info("REQUEST:  %s %s", request.method, request.path)

incorporealcms/config.py

@@ -32,5 +32,9 @@ class Config(object):
         },
     }
 
+    MARKDOWN_EXTENSIONS = ['mdx_linkify', 'tables']
+
+    DEFAULT_PAGE_STYLE = 'light'
+
     TITLE_SUFFIX = 'incorporeal.org'
     MEDIA_DIR = 'media'

incorporealcms/lib.py

@@ -0,0 +1,7 @@
+"""Miscellaneous helper functions and whatnot."""
+from flask import current_app as app
+
+
+def get_meta_str(key):
+    """Provide the page's metadata for the specified key, or '' if unset."""
+    return " ".join(app.config['md'].Meta.get(key)) if app.config['md'].Meta.get(key) else ""

incorporealcms/pages.py

@@ -3,16 +3,16 @@ import datetime
 import logging
 import os
 
-import markdown
 from flask import Blueprint, Markup, abort
 from flask import current_app as app
-from flask import redirect, render_template
+from flask import make_response, redirect, render_template, request
 from tzlocal import get_localzone
 
+from incorporealcms.lib import get_meta_str
+
 logger = logging.getLogger(__name__)
 
 bp = Blueprint('pages', __name__, url_prefix='/')
-md = markdown.Markdown(extensions=['meta', 'tables'])
 
 
 @bp.route('/', defaults={'path': 'index'})
@@ -34,11 +34,36 @@ def display_page(path):
         logger.warning("requested path '%s' (resolved path '%s') not found!", path, resolved_path)
         abort(404)
     else:
-        content = Markup(md.convert(entry))
+        content = Markup(app.config['md'].convert(entry))
-        logger.debug("file metadata: %s", md.Meta)
+        logger.debug("file metadata: %s", app.config['md'].Meta)
-        title = " ".join(md.Meta.get('title')) if md.Meta.get('title') else ""
+
-        return render_template('base.html', title=title, content=content, navs=parent_navs,
+        return render('base.html', title=get_meta_str('title'), description=get_meta_str('description'),
-                               mtime=mtime.strftime('%Y-%m-%d %H:%M:%S %Z'))
+                      image=get_meta_str('image'), base_url=request.base_url, content=content, navs=parent_navs,
+                      mtime=mtime.strftime('%Y-%m-%d %H:%M:%S %Z'))
+
+
+def render(template_name_or_list, **context):
+    """Wrap Flask's render_template.
+
+    * Determine the proper site theme to use in the template and provide it.
+    """
+    PAGE_STYLES = {
+        'dark': 'css/dark.css',
+        'light': 'css/light.css',
+    }
+
+    selected_style = request.args.get('style', None)
+    if selected_style:
+        user_style = selected_style
+    else:
+        user_style = request.cookies.get('user-style')
+        logger.debug("user style cookie: %s", user_style)
+    context['user_style'] = PAGE_STYLES.get(user_style, PAGE_STYLES.get(app.config['DEFAULT_PAGE_STYLE']))
+
+    resp = make_response(render_template(template_name_or_list, **context))
+    if selected_style:
+        resp.set_cookie('user-style', selected_style)
+    return resp
 
 
 def resolve_page_file(path):
@@ -86,6 +111,6 @@ def generate_parent_navs(path):
     else:
         with app.open_instance_resource(resolved_path, 'r') as entry_file:
             entry = entry_file.read()
-        _ = Markup(md.convert(entry))
+        _ = Markup(app.config['md'].convert(entry))
-        page_name = " ".join(md.Meta.get('title')) if md.Meta.get('title') else f'/{path}'
+        page_name = " ".join(app.config['md'].Meta.get('title')) if app.config['md'].Meta.get('title') else f'/{path}'
         return generate_parent_navs(parent_path) + [(page_name, f'/{path}')]

incorporealcms/static/css/dark.css

@@ -0,0 +1,61 @@
+html {
+    color: #DDD;
+}
+
+body {
+    background: black;
+}
+
+.site-wrap {
+    background: #111;
+
+    border: 1px solid #222;
+    border-top: none;
+    border-bottom: none;
+}
+
+h1, h2, h3, h4, h5, h6 {
+    color: #B31D15;
+}
+
+a:link, a:visited {
+    color: #EEE;
+    border-bottom: 1px dotted #EEE;
+}
+
+a:hover, a:active {
+    color: #B31D15;
+    border-bottom: 1px dotted #EEE;
+}
+
+section.nav, section.styles {
+    color: #BBB;
+    background: #222;
+    border-bottom: 1px solid #222;
+}
+
+section.nav a, section.styles a {
+    color: #BBB;
+}
+
+table, th, td {
+    border: 1px solid #333;
+}
+
+th {
+    background: #333;
+}
+
+blockquote {
+    background-color: rgba(120, 120, 120, 0.3);
+    border: 1px solid #222;
+}
+
+figure {
+    background: #222;
+    border: 1px solid #333;
+}
+
+figcaption {
+    color: #BBB;
+}

incorporealcms/static/css/light.css

@@ -0,0 +1,61 @@
+html {
+    color: #222;
+}
+
+body {
+    background: #888;
+}
+
+.site-wrap {
+    background: white;
+
+    border: 1px solid #ddd;
+    border-top: none;
+    border-bottom: none;
+}
+
+h1, h2, h3, h4, h5, h6 {
+    color: #811610;
+}
+
+a:link, a:visited {
+    color: #111;
+    border-bottom: 1px dotted #111;
+}
+
+a:hover, a:active {
+    color: #811610;
+    border-bottom: 1px dotted #111;
+}
+
+section.nav, section.styles {
+    color: #666;
+    background: #EEE;
+    border-bottom: 1px solid #CCC;
+}
+
+section.nav a, section.styles a {
+    color: #666;
+}
+
+table, th, td {
+    border: 1px solid #ccc;
+}
+
+th {
+    background: #eee;
+}
+
+blockquote {
+    background-color: rgba(120, 120, 120, 0.1);
+    border: 1px solid #CCC;
+}
+
+figure {
+    background: #EFEFEF;
+    border: 1px solid #CCCCCC;
+}
+
+figcaption {
+    color: #777777;
+}

incorporealcms/static/css/style.css

@@ -1,31 +1,22 @@
 html {
     font-family: sans-serif;
     padding: 0;
-    color: #222;
 }
 
 body {
-    background: #888;
-
     margin: 0;
+    text-size-adjust: 100%;
+    -ms-text-size-adjust: 100%;
+    -moz-text-size-adjust: 100%;
+    -webkit-text-size-adjust: 100%;
 }
 
 .site-wrap {
-    background: white;
-
     max-width: 70pc;
     min-height: 100vh;
     margin: 0;
     margin-left: auto;
     margin-right: auto;
-
-    border: 1px solid #ddd;
-    border-top: none;
-    border-bottom: none;
-}
-
-h1,h2,h3,h4,h5,h6 {
-    color: #811610;
 }
 
 h1 {
@@ -53,46 +44,39 @@ h6 {
 }
 
 a:link {
-    color: #222;
     font-weight: bold;
     text-decoration: none;
-    border-bottom: 1px dotted #222;
 }
 
 a:visited {
-    color: #222;
     font-weight: bold;
     text-decoration: none;
-    border-bottom: 1px dotted #222;
 }
 
 a:hover {
-    color: #811610;
     font-weight: bold;
     text-decoration: none;
-    border-bottom: 1px dotted #222;
 }
 
 a:active {
-    color: #811610;
     font-weight: bold;
     text-decoration: none;
-    border-bottom: 1px dotted #222;
 }
 
-section.nav {
+section.nav, section.styles {
-    color: #666;
-    background: #eee;
     font-size: 0.75em;
-    border-bottom: 1px solid #ccc;
+    border-bottom: 1px solid #444;
     padding: 0.25em 0.5em;
 }
 
-section.nav a {
+section.nav a, section.styles a {
-    color: #666;
     border-bottom: none;
 }
 
+section.styles {
+    float: right;
+}
+
 section.content {
     font-size: 11pt;
 
@@ -119,11 +103,73 @@ table, th, td {
     margin-bottom: 15px;
 }
 
-th {
-    background: #eee;
-}
-
 blockquote {
-    background-color: rgba(120, 120, 120, 0.1);
+    background-color: rgba(120, 120, 120, 0.3);
     padding: 1px 10px;
 }
+
+.splash {
+    margin-top: 1em;
+    margin-bottom: 1em;
+    text-align: center;
+}
+
+.splash img {
+    max-width: 100%;
+}
+
+.img-50 {
+    max-width: 50% !important;
+}
+
+/* For screens with width smaller than 400px */
+.figure-left .figure-right {
+    max-width: 95%;
+    float: none;
+    margin-left: 10px;
+    margin-right: 10px;
+}
+
+/* For larger screens */
+@media only screen and (min-width: 400px) {
+    .figure-left {
+        float: left;
+        margin-top: 0;
+        margin-left: 0;
+    }
+
+    .figure-right {
+        float: right;
+        margin-top: 0;
+        margin-right: 0;
+    }
+}
+
+figure {
+    max-width: 400px;
+    padding: 5px;
+    margin: 10px;
+    margin-top: 0;
+    margin-bottom: 5px;
+}
+
+figure img {
+    max-width: 100%;
+    height: auto;
+}
+
+figcaption {
+    font-family: "Times New Roman", serif;
+    color: #777777;
+    text-align: center;
+    font-style: italic;
+    line-height: 1.3em;
+    margin-top: 5px;
+}
+
+.thumbnail-image {
+    width: 150px;
+    height: auto;
+    margin: 5px;
+    display: inline;
+}

incorporealcms/templates/base.html

@@ -1,8 +1,20 @@
 <!doctype html>
 <title>{{ title }}{% if title %} - {% endif %}{{ config.TITLE_SUFFIX }}</title>
+{% if title %}<meta property="og:title" content="{{ title }}">{% endif %}
+{% if description %}<meta property="og:description" content="{{ description }}">{% endif %}
+{% if image %}<meta property="og:image" content="{{ image }}">{% endif %}
+<meta property="og:url" content="{{ base_url }}">
+<meta name="twitter:card" content="summary_large_image">
+<meta name="viewport" content="width=device-width, initial-scale=1">
 <link rel="stylesheet" href="{{ url_for('static', filename='css/style.css') }}">
+<link rel="stylesheet" href="{{ url_for('static', filename=user_style) }}">
 <link rel="icon" href="{{ url_for('static', filename='img/favicon.png') }}">
+
 <section class="site-wrap">
+    <section class="styles">
+        <a href="?style=dark">[dark]</a>
+        <a href="?style=light">[light]</a>
+    </section>
     <section class="nav">
         {% for nav in navs %}
         <a href="{{ nav.1 }}">{{ nav.0 }}</a>

requirements/requirements-dev.txt

@@ -4,61 +4,148 @@
 #
 #    pip-compile --output-file=requirements/requirements-dev.txt requirements/requirements-dev.in
 #
-appdirs==1.4.4            # via virtualenv
+appdirs==1.4.4
-attrs==20.2.0             # via pytest
+    # via virtualenv
-bandit==1.6.2             # via -r requirements/requirements-dev.in
+attrs==20.3.0
-click==7.1.2              # via flask, pip-tools
+    # via pytest
-coverage==5.3             # via pytest-cov
+bandit==1.7.0
-distlib==0.3.1            # via virtualenv
+    # via -r requirements/requirements-dev.in
-dlint==0.10.3             # via -r requirements/requirements-dev.in
+bleach==3.2.2
-filelock==3.0.12          # via tox, virtualenv
+    # via mdx-linkify
-flake8-blind-except==0.1.1  # via -r requirements/requirements-dev.in
+click==7.1.2
-flake8-builtins==1.5.3    # via -r requirements/requirements-dev.in
+    # via
-flake8-docstrings==1.5.0  # via -r requirements/requirements-dev.in
+    #   flask
-flake8-executable==2.0.4  # via -r requirements/requirements-dev.in
+    #   pip-tools
-flake8-fixme==1.1.1       # via -r requirements/requirements-dev.in
+coverage==5.3.1
-flake8-isort==4.0.0       # via -r requirements/requirements-dev.in
+    # via pytest-cov
-flake8-logging-format==0.6.0  # via -r requirements/requirements-dev.in
+distlib==0.3.1
-flake8-mutable==1.2.0     # via -r requirements/requirements-dev.in
+    # via virtualenv
-flake8==3.8.4             # via -r requirements/requirements-dev.in, dlint, flake8-builtins, flake8-docstrings, flake8-executable, flake8-isort, flake8-mutable
+dlint==0.11.0
-flask==1.1.2              # via -r requirements/requirements.in
+    # via -r requirements/requirements-dev.in
-gitdb==4.0.5              # via gitpython
+filelock==3.0.12
-gitpython==3.1.9          # via bandit
+    # via
-importlib-metadata==2.0.0  # via flake8, markdown, pluggy, pytest, stevedore, tox, virtualenv
+    #   tox
-iniconfig==1.1.1          # via pytest
+    #   virtualenv
-isort==5.6.4              # via flake8-isort
+flake8-blind-except==0.2.0
-itsdangerous==1.1.0       # via flask
+    # via -r requirements/requirements-dev.in
-jinja2==2.11.2            # via flask
+flake8-builtins==1.5.3
-markdown==3.3.2           # via -r requirements/requirements.in
+    # via -r requirements/requirements-dev.in
-markupsafe==1.1.1         # via jinja2
+flake8-docstrings==1.5.0
-mccabe==0.6.1             # via flake8
+    # via -r requirements/requirements-dev.in
-packaging==20.4           # via pytest, tox
+flake8-executable==2.1.1
-pbr==5.5.1                # via stevedore
+    # via -r requirements/requirements-dev.in
-pip-tools==5.3.1          # via -r requirements/requirements-dev.in
+flake8-fixme==1.1.1
-pluggy==0.13.1            # via pytest, tox
+    # via -r requirements/requirements-dev.in
-py==1.9.0                 # via pytest, tox
+flake8-isort==4.0.0
-pycodestyle==2.6.0        # via flake8
+    # via -r requirements/requirements-dev.in
-pydocstyle==5.1.1         # via flake8-docstrings
+flake8-logging-format==0.6.0
-pyflakes==2.2.0           # via flake8
+    # via -r requirements/requirements-dev.in
-pyparsing==2.4.7          # via packaging
+flake8-mutable==1.2.0
-pytest-cov==2.10.1        # via -r requirements/requirements-dev.in
+    # via -r requirements/requirements-dev.in
-pytest==6.1.1             # via -r requirements/requirements-dev.in, pytest-cov
+flake8==3.8.4
-pytz==2020.1              # via tzlocal
+    # via
-pyyaml==5.3.1             # via bandit
+    #   -r requirements/requirements-dev.in
-six==1.15.0               # via bandit, packaging, pip-tools, tox, virtualenv
+    #   dlint
-smmap==3.0.4              # via gitdb
+    #   flake8-builtins
-snowballstemmer==2.0.0    # via pydocstyle
+    #   flake8-docstrings
-stevedore==3.2.2          # via bandit
+    #   flake8-executable
-testfixtures==6.15.0      # via flake8-isort
+    #   flake8-isort
-toml==0.10.1              # via pytest, tox
+    #   flake8-mutable
-tox-wheel==0.5.0          # via -r requirements/requirements-dev.in
+flask==1.1.2
-tox==3.20.1               # via -r requirements/requirements-dev.in, tox-wheel
+    # via -r requirements/requirements.in
-tzlocal==2.1              # via -r requirements/requirements.in
+gitdb==4.0.5
-versioneer==0.18          # via -r requirements/requirements-dev.in
+    # via gitpython
-virtualenv==20.0.35       # via tox
+gitpython==3.1.12
-werkzeug==1.0.1           # via flask
+    # via bandit
-wheel==0.35.1             # via tox-wheel
+iniconfig==1.1.1
-zipp==3.3.1               # via importlib-metadata
+    # via pytest
+isort==5.7.0
+    # via flake8-isort
+itsdangerous==1.1.0
+    # via flask
+jinja2==2.11.2
+    # via flask
+markdown==3.3.3
+    # via
+    #   -r requirements/requirements.in
+    #   mdx-linkify
+markupsafe==1.1.1
+    # via jinja2
+mccabe==0.6.1
+    # via flake8
+mdx-linkify==2.1
+    # via -r requirements/requirements.in
+packaging==20.8
+    # via
+    #   bleach
+    #   pytest
+    #   tox
+pbr==5.5.1
+    # via stevedore
+pip-tools==5.5.0
+    # via -r requirements/requirements-dev.in
+pluggy==0.13.1
+    # via
+    #   pytest
+    #   tox
+py==1.10.0
+    # via
+    #   pytest
+    #   tox
+pycodestyle==2.6.0
+    # via flake8
+pydocstyle==5.1.1
+    # via flake8-docstrings
+pyflakes==2.2.0
+    # via flake8
+pyparsing==2.4.7
+    # via packaging
+pytest-cov==2.11.1
+    # via -r requirements/requirements-dev.in
+pytest==6.2.1
+    # via
+    #   -r requirements/requirements-dev.in
+    #   pytest-cov
+pytz==2020.5
+    # via tzlocal
+pyyaml==5.4.1
+    # via bandit
+six==1.15.0
+    # via
+    #   bandit
+    #   bleach
+    #   tox
+    #   virtualenv
+smmap==3.0.4
+    # via gitdb
+snowballstemmer==2.1.0
+    # via pydocstyle
+stevedore==3.3.0
+    # via bandit
+testfixtures==6.17.1
+    # via flake8-isort
+toml==0.10.2
+    # via
+    #   pytest
+    #   tox
+tox-wheel==0.6.0
+    # via -r requirements/requirements-dev.in
+tox==3.21.2
+    # via
+    #   -r requirements/requirements-dev.in
+    #   tox-wheel
+tzlocal==2.1
+    # via -r requirements/requirements.in
+versioneer==0.19
+    # via -r requirements/requirements-dev.in
+virtualenv==20.4.0
+    # via tox
+webencodings==0.5.1
+    # via bleach
+werkzeug==1.0.1
+    # via flask
+wheel==0.36.2
+    # via tox-wheel
 
 # The following packages are considered to be unsafe in a requirements file:
 # pip

requirements/requirements.in

@@ -1,3 +1,4 @@
 Flask                       # general purpose web service and web server stuff
 Markdown                    # markdown rendering in templates
+mdx-linkify                 # convert URLs in the text to clickable links
 tzlocal                     # identifying system's local timezone

requirements/requirements.txt

@@ -4,14 +4,35 @@
 #
 #    pip-compile --output-file=requirements/requirements.txt requirements/requirements.in
 #
-click==7.1.2              # via flask
+bleach==3.2.2
-flask==1.1.2              # via -r requirements/requirements.in
+    # via mdx-linkify
-importlib-metadata==2.0.0  # via markdown
+click==7.1.2
-itsdangerous==1.1.0       # via flask
+    # via flask
-jinja2==2.11.2            # via flask
+flask==1.1.2
-markdown==3.3.2           # via -r requirements/requirements.in
+    # via -r requirements/requirements.in
-markupsafe==1.1.1         # via jinja2
+itsdangerous==1.1.0
-pytz==2020.1              # via tzlocal
+    # via flask
-tzlocal==2.1              # via -r requirements/requirements.in
+jinja2==2.11.2
-werkzeug==1.0.1           # via flask
+    # via flask
-zipp==3.3.1               # via importlib-metadata
+markdown==3.3.3
+    # via
+    #   -r requirements/requirements.in
+    #   mdx-linkify
+markupsafe==1.1.1
+    # via jinja2
+mdx-linkify==2.1
+    # via -r requirements/requirements.in
+packaging==20.8
+    # via bleach
+pyparsing==2.4.7
+    # via packaging
+pytz==2020.5
+    # via tzlocal
+six==1.15.0
+    # via bleach
+tzlocal==2.1
+    # via -r requirements/requirements.in
+webencodings==0.5.1
+    # via bleach
+werkzeug==1.0.1
+    # via flask

tests/functional_tests.py

@@ -30,6 +30,15 @@ def test_page_without_title_metadata(client):
     assert b'<h1>this page doesn\'t have a title!</h1>' in response.data
 
 
+def test_page_with_card_metadata(client):
+    """Test that a page with opengraph metadata."""
+    response = client.get('/more-metadata')
+    assert response.status_code == 200
+    assert b'<meta property="og:title" content="title for the page">' in response.data
+    assert b'<meta property="og:description" content="description of this page made even longer">' in response.data
+    assert b'<meta property="og:image" content="http://buh.com/test.img">' in response.data
+
+
 def test_page_has_modified_timestamp(client):
     """Test that pages have modified timestamps in them."""
     response = client.get('/')
@@ -52,3 +61,24 @@ def test_that_dir_request_does_not_redirect(client):
     response = client.get('/subdir/')
     assert response.status_code == 200
     assert b'another page' in response.data
+
+
+def test_setting_selected_style_includes_cookie(client):
+    """Test that a request with style=foo sets the cookie and renders appropriately."""
+    response = client.get('/')
+    style_cookie = next((cookie for cookie in client.cookie_jar if cookie.name == 'user-style'), None)
+    assert style_cookie is None
+
+    response = client.get('/?style=light')
+    style_cookie = next((cookie for cookie in client.cookie_jar if cookie.name == 'user-style'), None)
+    assert response.status_code == 200
+    assert b'light.css' in response.data
+    assert b'dark.css' not in response.data
+    assert style_cookie.value == 'light'
+
+    response = client.get('/?style=dark')
+    style_cookie = next((cookie for cookie in client.cookie_jar if cookie.name == 'user-style'), None)
+    assert response.status_code == 200
+    assert b'dark.css' in response.data
+    assert b'light.css' not in response.data
+    assert style_cookie.value == 'dark'

tests/instance/pages/mdash-or-triple-dash.md

@@ -0,0 +1,3 @@
+Test page
+
+word --- word

tests/instance/pages/more-metadata.md

@@ -0,0 +1,6 @@
+Title:          title for the page
+Description:    description of this page
+                made even longer
+Image:          http://buh.com/test.img
+
+hello

tests/test_factory.py

@@ -13,6 +13,32 @@ def test_config():
     assert create_app(instance_path=instance_path, test_config={"TESTING": True}).testing
 
 
+def test_markdown_meta_extension_always():
+    """Test that the markdown meta extension is always loaded, even if not specified."""
+    app = create_app(instance_path=os.path.join(HERE, 'instance'),
+                     test_config={'MARKDOWN_EXTENSIONS': []})
+    client = app.test_client()
+    response = client.get('/')
+    assert response.status_code == 200
+    assert b'<title>Index - incorporeal.org</title>' in response.data
+
+
+def test_extra_markdown_extensions_work():
+    """Test we can load more extensions via config, and that they work."""
+    app = create_app(instance_path=os.path.join(HERE, 'instance'))
+    client = app.test_client()
+    response = client.get('/mdash-or-triple-dash')
+    assert response.status_code == 200
+    assert b'word --- word' in response.data
+
+    app = create_app(instance_path=os.path.join(HERE, 'instance'),
+                     test_config={'MARKDOWN_EXTENSIONS': ['smarty']})
+    client = app.test_client()
+    response = client.get('/mdash-or-triple-dash')
+    assert response.status_code == 200
+    assert b'word &mdash; word' in response.data
+
+
 def test_title_override():
     """Test that a configuration with a specific title overrides the default."""
     instance_path = os.path.join(HERE, 'instance')

tests/test_pages.py

@@ -1,5 +1,7 @@
 """Unit test helper methods."""
-from incorporealcms.pages import generate_parent_navs, is_file_path_actually_dir_path, resolve_page_file
+from werkzeug.http import dump_cookie
+
+from incorporealcms.pages import generate_parent_navs, is_file_path_actually_dir_path, render, resolve_page_file
 
 
 def test_resolve_page_file_dir_to_index():
@@ -74,3 +76,25 @@ def test_is_file_path_actually_dir_path_nonsense_dir_is_no(app):
     """Test that a directory request is a directory request even if the dir doesn't exist."""
     with app.app_context():
         assert not is_file_path_actually_dir_path('/antphnathpnthapnthsnthax/')
+
+
+def test_render_with_user_dark_theme(app):
+    """Test that a request with the dark theme selected renders the dark theme."""
+    cookie = dump_cookie("user-style", 'dark')
+    with app.test_request_context(headers={'COOKIE': cookie}):
+        assert b'dark.css' in render('base.html').data
+        assert b'light.css' not in render('base.html').data
+
+
+def test_render_with_user_light_theme(app):
+    """Test that a request with the light theme selected renders the light theme."""
+    with app.test_request_context():
+        assert b'light.css' in render('base.html').data
+        assert b'dark.css' not in render('base.html').data
+
+
+def test_render_with_no_user_theme(app):
+    """Test that a request with no theme set renders the light theme."""
+    with app.test_request_context():
+        assert b'light.css' in render('base.html').data
+        assert b'dark.css' not in render('base.html').data