Fix --no-julia; declare missing dependencies (#469)

Author: tkf

src/julia/tests/test_magic.py

@@ -173,11 +173,11 @@ def throw():
 
 
 @pytest.mark.skipif(sys.version_info[0] < 3, reason="Python 2 not supported")
-def test_completions():
+def test_completions(julia):
     from IPython.core.completer import provisionalcompleter
     from julia.ipy.monkeypatch_completer import JuliaCompleter
 
-    jc = JuliaCompleter()
+    jc = JuliaCompleter(julia)
     t = "%julia Base.si"
     with provisionalcompleter():
         completions = jc.julia_completions(t, len(t))

src/julia/tests/test_plugin.py

@@ -48,7 +48,7 @@ def test():
 @pytest.mark.skipif(
     is_windows, reason="cannot run on Windows; symlink is used inside test"
 )
-def test_undo_no_julia(testdir, request):
+def test_undo_no_julia(testdir, request, julia):
     if request.config.getoption("runpytest") != "subprocess":
         raise ValueError("Need `-p pytester --runpytest=subprocess` options.")