Better tests for fstrings

test/completion/fstring.py

@@ -22,3 +22,6 @@ F"{Excepti
 Fr'a{Foo.bar'
 #? str()
 Fr'sasdf'
+
+#? 7 str()
+Fr'''sasdf''' + ''

test/test_evaluate/test_fstring.py

@@ -0,0 +1,19 @@
+import pytest
+from textwrap import dedent
+
+
+@pytest.fixture(autouse=True)
+def skip_not_supported(environment):
+    if environment.version_info < (3, 6):
+        pytest.skip()
+
+
+def test_fstring_multiline(Script):
+    code = dedent("""\
+        '' f'''s{
+           str.uppe
+        '''
+        """
+    )
+    c, = Script(code, line=2, column=9).completions()
+    assert c.name == 'upper'