added tests for built-in templates page and article

tests/test_templates.py

@@ -0,0 +1,40 @@
+from jinja2 import Environment, PackageLoader
+import pytest
+
+
+@pytest.fixture
+def environment():
+    env = Environment(
+            loader=PackageLoader('blag', 'templates')
+    )
+    yield env
+
+
+@pytest.fixture
+def page_template(environment):
+    yield environment.get_template('page.html')
+
+
+@pytest.fixture
+def article_template(environment):
+    yield environment.get_template('article.html')
+
+
+def test_page(page_template):
+    ctx = {
+        'content': 'this is the content',
+        'title': 'this is the title',
+    }
+    result = page_template.render(ctx)
+    assert 'this is the content' in result
+    assert 'this is the title' in result
+
+
+def test_article(article_template):
+    ctx = {
+        'content': 'this is the content',
+        'title': 'this is the title',
+    }
+    result = article_template.render(ctx)
+    assert 'this is the content' in result
+    assert 'this is the title' in result