From 8c9e374c996e7473e11afd55b8eac48866ad6f9d Mon Sep 17 00:00:00 2001
From: Henry Schreiner <henryschreineriii@gmail.com>
Date: Fri, 17 Dec 2021 15:59:30 -0500
Subject: [PATCH] tests: fix issues and add a simple mamba test

---
 nox/virtualenv.py      | 4 +---
 tests/test_sessions.py | 8 ++++++--
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/nox/virtualenv.py b/nox/virtualenv.py
index f5b4b37c..501118f9 100644
--- a/nox/virtualenv.py
+++ b/nox/virtualenv.py
@@ -156,9 +156,7 @@ class PassthroughEnv(ProcessEnv):
     hints about the actual env.
     """
 
-    @property
-    def conda_cmd(self) -> str:
-        return "conda"
+    conda_cmd = "conda"
 
     @staticmethod
     def is_offline() -> bool:
diff --git a/tests/test_sessions.py b/tests/test_sessions.py
index 6bcd916d..a7d16425 100644
--- a/tests/test_sessions.py
+++ b/tests/test_sessions.py
@@ -384,7 +384,8 @@ def test_conda_install_not_a_condaenv(self):
         "auto_offline", [False, True], ids="auto_offline={}".format
     )
     @pytest.mark.parametrize("offline", [False, True], ids="offline={}".format)
-    def test_conda_install(self, auto_offline, offline):
+    @pytest.mark.parametrize("conda", ["conda", "mamba"], ids=str)
+    def test_conda_install(self, auto_offline, offline, conda):
         runner = nox.sessions.SessionRunner(
             name="test",
             signatures=["test"],
@@ -396,6 +397,7 @@ def test_conda_install(self, auto_offline, offline):
         runner.venv.location = "/path/to/conda/env"
         runner.venv.env = {}
         runner.venv.is_offline = lambda: offline
+        runner.venv.conda_cmd = conda
 
         class SessionNoSlots(nox.sessions.Session):
             pass
@@ -406,7 +408,7 @@ class SessionNoSlots(nox.sessions.Session):
             args = ("--offline",) if auto_offline and offline else ()
             session.conda_install("requests", "urllib3", auto_offline=auto_offline)
             run.assert_called_once_with(
-                "conda",
+                conda,
                 "install",
                 "--yes",
                 *args,
@@ -434,6 +436,7 @@ def test_conda_venv_reused_with_no_install(self, no_install, reused, run_called)
         runner.venv.location = "/path/to/conda/env"
         runner.venv.env = {}
         runner.venv.is_offline = lambda: True
+        runner.venv.conda_cmd = "conda"
 
         runner.global_config.no_install = no_install
         runner.venv._reused = reused
@@ -460,6 +463,7 @@ def test_conda_install_non_default_kwargs(self, version_constraint):
         runner.venv.location = "/path/to/conda/env"
         runner.venv.env = {}
         runner.venv.is_offline = lambda: False
+        runner.venv.conda_cmd = "conda"
 
         class SessionNoSlots(nox.sessions.Session):
             pass