remove superfluous leading/trailing whitespace (#181)

tests/test_args.py

@@ -2,7 +2,8 @@
 Test whitelisting/blacklisting of specific tags.
 
 """
-from markdownify import markdownify as md
+from markdownify import markdownify, LSTRIP, RSTRIP, STRIP
+from .utils import md
 
 
 def test_strip():
@@ -23,3 +24,11 @@ def test_convert():
 def test_do_not_convert():
     text = md('<a href="https://github.com/matthewwithanm">Some Text</a>', convert=[])
     assert text == 'Some Text'
+
+
+def test_strip_document():
+    assert markdownify("<p>Hello</p>") == "Hello"  # test default of STRIP
+    assert markdownify("<p>Hello</p>", strip_document=LSTRIP) == "Hello\n\n"
+    assert markdownify("<p>Hello</p>", strip_document=RSTRIP) == "\n\nHello"
+    assert markdownify("<p>Hello</p>", strip_document=STRIP) == "Hello"
+    assert markdownify("<p>Hello</p>", strip_document=None) == "\n\nHello\n\n"