added support for implicit ns packages and added tests

test/test_evaluate/test_implicit_namespace_package.py

@@ -0,0 +1,58 @@
+from os.path import dirname, join
+
+import jedi
+import pytest
+
+
+@pytest.mark.skipif('sys.version_info[:2] < (3,4)')
+def test_implicit_namespace_package():
+    sys_path = [join(dirname(__file__), d)
+                for d in ['implicit_namespace_package/ns1', 'implicit_namespace_package/ns2']]
+
+    def script_with_path(*args, **kwargs):
+        return jedi.Script(sys_path=sys_path, *args, **kwargs)
+
+    # goto definition
+    assert script_with_path('from pkg import ns1_file').goto_definitions()
+    assert script_with_path('from pkg import ns2_file').goto_definitions()
+    assert not script_with_path('from pkg import ns3_file').goto_definitions()
+
+    # goto assignment
+    tests = {
+        'from pkg.ns2_file import foo': 'ns2_file!',
+        'from pkg.ns1_file import foo': 'ns1_file!',
+    }
+    for source, solution in tests.items():
+        ass = script_with_path(source).goto_assignments()
+        assert len(ass) == 1
+        assert ass[0].description == "foo = '%s'" % solution
+
+    # completion
+    completions = script_with_path('from pkg import ').completions()
+    names = [str(c.name) for c in completions]  # str because of unicode
+    compare = ['ns1_file', 'ns2_file']
+    # must at least contain these items, other items are not important
+    assert set(compare) == set(names)
+
+    tests = {
+        'from pkg import ns2_file as x': 'ns2_file!',
+        'from pkg import ns1_file as x': 'ns1_file!'
+    }
+    for source, solution in tests.items():
+        for c in script_with_path(source + '; x.').completions():
+            if c.name == 'foo':
+                completion = c
+        solution = "foo = '%s'" % solution
+        assert completion.description == solution
+
+@pytest.mark.skipif('sys.version_info[:2] < (3,4)')
+def test_implicit_nested_namespace_package():
+    CODE = 'from implicit_nested_namespaces.namespace.pkg.module import CONST'
+
+    sys_path = [dirname(__file__)]
+
+    script = jedi.Script(sys_path=sys_path, source=CODE, line=1, column=61)
+
+    result = script.goto_definitions()
+
+    assert len(result) == 1