Update tests for the new MD renderer

Empty __init__.py and unused fixtures/files are
removed. The new test only verifies the download
url. The acutual render process is done in the
browser.

tests/extensions/md/test_renderer.py

@@ -1,12 +1,13 @@
 import os
+
 import pytest
 
 from mfr.core.provider import ProviderMetadata
 from mfr.extensions.md import MdRenderer
 
 
 @pytest.fixture
-def metadata():
+def provider_metadata():
     return ProviderMetadata('test', '.md', 'text/plain', '1234', 'http://wb.osf.io/file/test.md?token=1234')
 
 
@@ -15,10 +16,6 @@ def test_md_file_path():
     return os.path.join(os.path.dirname(os.path.abspath(__file__)), 'files', 'test.md')
 
 
-@pytest.fixture
-def invalid_md_file_path():
-    return os.path.join(os.path.dirname(os.path.abspath(__file__)), 'files', 'invalid.md')
-
 @pytest.fixture
 def url():
     return 'http://osf.io/file/test.md'
@@ -35,51 +32,18 @@ def export_url():
 
 
 @pytest.fixture
-def renderer(metadata, test_md_file_path, url, assets_url, export_url):
-    return MdRenderer(metadata, test_md_file_path, url, assets_url, export_url)
+def mock_renderer(provider_metadata, test_md_file_path, url, assets_url, export_url):
+    return MdRenderer(provider_metadata, test_md_file_path, url, assets_url, export_url)
 
 
 class TestMdRenderer:
 
-    def test_render_md_file_required(self, renderer):
-        assert renderer.file_required is True
-
-    def test_render_md_cache_result(self, renderer):
-        assert renderer.cache_result is True
-
-    def test_render_md(self, test_md_file_path, assets_url, export_url):
-        metadata = ProviderMetadata('test', '.md', 'text/plain', '1234', 'http://wb.osf.io/file/test.md?token=1234')
-        renderer = MdRenderer(metadata, test_md_file_path, url, assets_url, export_url)
-        body = renderer.render()
-        inbody = """
-<h1>Heading</h1>
-<h2>Sub-heading</h2>
-<h3>Another deeper heading</h3>
-<p>Paragraphs are separated
-by a blank line.</p>
-<p>Leave 2 spaces at the end of a line to do a<br />
-line break</p>
-<p>Text attributes <em>italic</em>, <strong>bold</strong>, 
-<code>monospace</code>.</p>
-<p>A <a href="http://example.com">link</a>.
-[28]</p>
-<p>Shopping list:</p>
-<ul>
-<li>apples</li>
-<li>oranges</li>
-<li>pears</li>
-</ul>
-<p>Numbered list:</p>
-<ol>
-<li>apples</li>
-<li>oranges</li>
-<li>pears</li>
-</ol>
-<p>The rain---not the reign---in
-Spain.</p>
-<p>&lt;script&gt;
-alert("Hello world");
-&lt;/script&gt;</p>
-"""
-        assert inbody in body
+    def test_render_md_file_required(self, mock_renderer):
+        assert mock_renderer.file_required is True
+
+    def test_render_md_cache_result(self, mock_renderer):
+        assert mock_renderer.cache_result is True
 
+    def test_render_md(self, mock_renderer):
+        body = mock_renderer.render()
+        assert mock_renderer.metadata.download_url in body