Move the completion tests.

test/test_api/test_completion.py

@@ -0,0 +1,17 @@
+from textwrap import dedent
+from jedi import Script
+
+
+def test_in_whitespace():
+    code = dedent('''
+    def x():
+        pass''')
+    assert len(Script(code, column=2).completions()) > 20
+
+
+def test_empty_init():
+    """This was actually an issue."""
+    code = dedent('''\
+    class X(object): pass
+    X(''')
+    assert Script(code).completions()