Switch to pytest

tests/test_basic.py

@@ -0,0 +1,13 @@
+from markdownify import markdownify as md
+
+
+def test_single_tag():
+    assert md('<span>Hello</span>') == 'Hello'
+
+
+def test_soup():
+    assert md('<div><span>Hello</div></span>') == 'Hello'
+
+
+def test_whitespace():
+    assert md(' a  b \n\n c ') == ' a b c '