python3Packages.click-completion: add pythonImportsCheck, disable checkPhase

pkgs/development/python-modules/click-completion/default.nix

@@ -1,18 +1,38 @@
-{ lib, buildPythonPackage, fetchPypi, isPy3k,
-  click, jinja2, shellingham, six
+{ lib
+, buildPythonPackage
+, fetchPypi
+, isPy27
+
+# propagates
+, click
+, jinja2
+, shellingham
+, six
 }:
 
 buildPythonPackage rec {
   pname = "click-completion";
   version = "0.5.2";
-  disabled = (!isPy3k);
+  disabled = isPy27;
 
   src = fetchPypi {
     inherit pname version;
     sha256 = "5bf816b81367e638a190b6e91b50779007d14301b3f9f3145d68e3cade7bce86";
   };
 
-  propagatedBuildInputs = [ click jinja2 shellingham six ];
+  propagatedBuildInputs = [
+    click
+    jinja2
+    shellingham
+    six
+  ];
+
+  pythonImportsCheck = [
+    "click_completion"
+  ];
+
+  # has no tests
+  doCheck = false;
 
   meta = with lib; {
     description = "Add or enhance bash, fish, zsh and powershell completion in Click";