Fix congratulations message that occurs on KeyboardInterrupt during package installation

docs/changelog/1453.bugfix.rst

@@ -0,0 +1 @@
+Fix the false ``congratulations`` message that appears when a ``KeyboardInterrupt`` occurs during package installation. - by :user:`gnikonorov`

src/tox/venv.py

@@ -430,6 +430,9 @@ def expand(val):
                 redirect=reporter.verbosity() < reporter.Verbosity.DEBUG,
                 env=env,
             )
+        except KeyboardInterrupt:
+            self.status = "keyboardinterrupt"
+            raise
         finally:
             sys.stdout = old_stdout
 
@@ -636,6 +639,9 @@ def setupenv(self):
                 status = e
                 if self.envconfig.config.option.skip_missing_interpreters == "true":
                     default_ret_code = 0
+            except KeyboardInterrupt:
+                self.status = "keyboardinterrupt"
+                raise
             if status:
                 str_status = str(status)
                 command_log = envlog.get_commandlog("setup")

tests/unit/test_venv.py

@@ -84,16 +84,18 @@ def test_create(mocksession, newconfig):
     assert venv.path_config.check(exists=False)
 
 
-def test_create_KeyboardInterrupt(mocksession, newconfig, mocker):
+@pytest.mark.parametrize("patched_venv_methodname", ["_pcall", "update"])
+def test_create_KeyboardInterrupt(mocksession, newconfig, mocker, patched_venv_methodname):
     config = newconfig(
         [],
         """\
         [testenv:py123]
+        deps = pip >= 19.3.1
         """,
     )
     mocksession.new_config(config)
     venv = mocksession.getvenv("py123")
-    mocker.patch.object(venv, "_pcall", side_effect=KeyboardInterrupt)
+    mocker.patch.object(venv, patched_venv_methodname, side_effect=KeyboardInterrupt)
     with pytest.raises(KeyboardInterrupt):
         venv.setupenv()
 
@@ -916,6 +918,20 @@ def test_run_custom_install_command(newmocksession):
     assert pcalls[0].args[1:] == ["whatever"]
 
 
+def test_run_install_command_handles_KeyboardInterrupt(newmocksession, mocker):
+    mocksession = newmocksession([], "")
+    venv = mocksession.getvenv("python")
+    venv.just_created = True
+    venv.envconfig.envdir.ensure(dir=1)
+
+    mocker.patch.object(venv, "_pcall", side_effect=KeyboardInterrupt)
+    with mocksession.newaction(venv.name, "hello") as action:
+        with pytest.raises(KeyboardInterrupt):
+            venv.run_install_command(packages=["whatever"], action=action)
+
+    assert venv.status == "keyboardinterrupt"
+
+
 def test_command_relative_issue36(newmocksession, tmpdir, monkeypatch):
     mocksession = newmocksession(
         [],