Merge pull request #4322 from pypa/bugfix/uninstall-missing-param

Correct the exception to PipenvUsageError

news/4321.bugfix.rst

@@ -0,0 +1 @@
+Fix a bug that ``pipenv uninstall`` throws an exception that does not exist.

pipenv/core.py

@@ -2231,10 +2231,7 @@ def do_uninstall(
     ensure_project(three=three, python=python, pypi_mirror=pypi_mirror)
     # Un-install all dependencies, if --all was provided.
     if not any([packages, editable_packages, all_dev, all]):
-        raise exceptions.MissingParameter(
-            crayons.red("No package provided!"),
-            ctx=ctx, param_type="parameter",
-        )
+        raise exceptions.PipenvUsageError("No package provided!", ctx=ctx)
     editable_pkgs = [
         Requirement.from_line("-e {0}".format(p)).name for p in editable_packages if p
     ]

tests/integration/test_uninstall.py

@@ -186,3 +186,14 @@ def test_uninstall_all_dev_with_shared_dependencies(PipenvInstance):
         assert c.return_code == 0
 
         assert "six" in p.lockfile["develop"]
+
+
+@pytest.mark.uninstall
+def test_uninstall_missing_parameters(PipenvInstance):
+    with PipenvInstance() as p:
+        c = p.pipenv("install requests")
+        assert c.return_code == 0
+
+        c = p.pipenv("uninstall")
+        assert c.return_code != 0
+        assert "No package provided!" in c.err